WO2014157247A1 - Curable composition - Google Patents

Curable composition Download PDF

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Publication number
WO2014157247A1
WO2014157247A1 PCT/JP2014/058359 JP2014058359W WO2014157247A1 WO 2014157247 A1 WO2014157247 A1 WO 2014157247A1 JP 2014058359 W JP2014058359 W JP 2014058359W WO 2014157247 A1 WO2014157247 A1 WO 2014157247A1
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Prior art keywords
curable composition
meth
acrylate
group
weight
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PCT/JP2014/058359
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French (fr)
Japanese (ja)
Inventor
村山 之彦
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積水フーラー株式会社
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Application filed by 積水フーラー株式会社 filed Critical 積水フーラー株式会社
Priority to CN201480017940.XA priority Critical patent/CN105073894B/en
Priority to JP2014543390A priority patent/JP5791824B2/en
Publication of WO2014157247A1 publication Critical patent/WO2014157247A1/en

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    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G65/00Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
    • C08G65/02Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring
    • C08G65/32Polymers modified by chemical after-treatment
    • C08G65/329Polymers modified by chemical after-treatment with organic compounds
    • C08G65/336Polymers modified by chemical after-treatment with organic compounds containing silicon
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L71/00Compositions of polyethers obtained by reactions forming an ether link in the main chain; Compositions of derivatives of such polymers
    • C08L71/02Polyalkylene oxides

Definitions

  • the present invention relates to a curable composition that can be cured in a short time and is excellent in adhesiveness and storage stability.
  • curable compositions containing a polymer having a crosslinkable hydrolyzable silyl group as a main component are known. Curable compositions are used in various applications as paints, coating agents, adhesives, pressure sensitive adhesives, sealants and sealants.
  • crosslinkable hydrolyzable silyl group of the polymer is hydrolyzed by the atmosphere or moisture contained in the adherend, followed by dehydration condensation, whereby the curable composition is cured and bonded. Forms a cured product with excellent strength.
  • Patent Document 1 discloses a curable composition containing a polyoxyalkylene polymer having a crosslinkable hydrolyzable silyl group. By using a polyoxyalkylene polymer, a curable composition that can be cured in a short time can be provided.
  • the curable composition of Patent Document 1 can be cured in a short time, it has low adhesion. For this reason, the cured product of the curable composition does not have sufficient adhesion to various substrates.
  • the curable composition of Patent Document 1 has low storage stability.
  • the curable composition is often stored for several months in a warehouse or a storefront after the production.
  • the curable composition of Patent Document 1 is stored for a long period of time, the viscosity of the curable composition is rapidly increased and coating is likely to be difficult.
  • an object of the present invention is to provide a curable composition that can be cured in a short time and is excellent in adhesion and storage stability.
  • the curable composition of the present invention comprises 100 parts by weight of a polyoxyalkylene polymer (A) having a trimethoxysilyl group, a hydrolyzable silyl group, and ethyl (meth) acrylate and n- Copolymer of butyl (meth) acrylate, or (meth) acrylate polymer (B) containing a copolymer of methyl (meth) acrylate and n-butyl (meth) acrylate, and dioctyltin compound It is characterized by containing.
  • A polyoxyalkylene polymer having a trimethoxysilyl group, a hydrolyzable silyl group, and ethyl (meth) acrylate and n- Copolymer of butyl (meth) acrylate
  • B containing a copolymer of methyl (meth) acrylate and n-butyl (meth) acrylate, and dioctyl
  • the polyoxyalkylene polymer (A) has a trimethoxysilyl group (—Si (OCH 3 ) 3 ).
  • the main chain skeleton of the polyoxyalkylene polymer (A) has the formula: — (RO) n — (wherein R represents an alkylene group having 1 to 14 carbon atoms, and n is the number of repeating units. It is preferable that the polymer contains a repeating unit represented by the following formula:
  • the main chain skeleton of the polyoxyalkylene polymer may be composed of only one type of repeating unit, or may be composed of two or more types of repeating units. According to the polyoxyalkylene polymer (A) having such a main chain skeleton, the curing rate of the curable composition can be improved.
  • the main chain skeleton of the polyoxyalkylene polymer (A) includes polyoxyethylene, polyoxypropylene, polyoxybutylene, polyoxytetramethylene, polyoxyethylene-polyoxypropylene copolymer, and polyoxypropylene-poly Examples thereof include oxybutylene copolymers. Of these, polyoxypropylene is preferable. According to polyoxypropylene, not only can the curing rate of the curable composition be improved, but also the adhesiveness of the curable composition can be improved, and the cured product obtained by curing the curable composition is excellent. Flexibility and extensibility can be imparted.
  • the polyoxyalkylene polymer (A) preferably further has a urethane bond in addition to the trimethoxysilyl group.
  • the urethane bond can promote the hydrolysis reaction and dehydration condensation reaction of the trimethoxysilyl group, thereby improving the curing rate of the curable composition.
  • the urethane bond can impart polarity to the polyoxyalkylene polymer (A), thereby improving the adhesiveness of the curable composition.
  • the polyoxyalkylene polymer (A) preferably has a trimethoxysilyl group at both ends of the main chain skeleton via urethane bonds. According to the polyoxyalkylene polymer (A) having a urethane bond in the vicinity of the trimethoxysilyl group, the curing rate and adhesiveness of the curable composition can be further improved.
  • a polyoxyalkylene polymer (A) having a trimethoxysilyl group via urethane bonds at both ends of the main chain skeleton includes, for example, a prepolymer having hydroxy groups at both ends of the polyoxyalkylene chain, and trimethoxysilyl It is obtained by reacting a compound having a group and an isocyanate group.
  • prepolymers having hydroxy groups at both ends of the polyoxyalkylene chain include poly (oxyethylene) glycol, poly (oxypropylene) glycol, poly (oxybutylene) glycol, poly (oxytetramethylene) glycol, and poly (oxyethylene).
  • poly (oxyethylene) glycol poly (oxypropylene) glycol, poly (oxybutylene) glycol, poly (oxytetramethylene) glycol, and poly (oxyethylene).
  • -Poly (oxypropylene) glycol and poly (oxypropylene) -poly (oxybutylene) glycol examples include poly (oxyethylene) glycol, poly (oxypropylene) glycol, poly (oxybutylene) glycol, poly (oxytetramethylene) glycol, and poly (oxyethylene).
  • Examples of the compound having a trimethoxysilyl group and an isocyanate group include 1-isocyanate methyltrimethoxysilane, 2-isocyanateethyltrimethoxysilane, 3-isocyanatepropyltrimethoxysilane, 3-isocyanatebutyltrimethoxysilane, 3-isocyanatepentyltril. Examples include methoxysilane and 1-isocyanatopropyltrimethoxysilane.
  • a prepolymer having hydroxy groups at both ends of the polyoxyalkylene chain By mixing a compound having a trimethoxysilyl group and an isocyanate group to obtain a mixture, and stirring the mixture to react the hydroxy group of the prepolymer with the isocyanate group of the compound to form a urethane bond. It can be carried out. Moreover, reaction can be accelerated
  • the number average molecular weight of the polyoxyalkylene polymer (A) is preferably 5,000 to 50,000, more preferably 8,000 to 30,000, and particularly preferably 8,000 to 20,000. According to the polyoxyalkylene polymer (A) having a number average molecular weight of 5,000 or more, it is possible to further improve the adhesive force, mechanical strength, and extensibility of the cured product of the curable composition. In addition, according to the polyoxyalkylene polymer (A) having a number average molecular weight of 50,000 or less, the viscosity of the curable composition can be kept low, whereby excellent coating of the curable composition can be achieved. Sex can be secured.
  • the number average molecular weight of the polyoxyalkylene polymer (A) is measured by conversion with polystyrene using a GPC (gel permeation chromatography) method. Specifically, after 6-7 mg of polyoxyalkylene polymer (A) is supplied to a test tube, orthodichlorobenzene (o-DCB) containing 0.05% by weight of dibutylhydroxytoluene (BHT) in the test tube The solution is added to prepare a diluted solution having a polyoxyalkylene polymer (A) concentration of 1 mg / mL.
  • o-DCB orthodichlorobenzene
  • BHT dibutylhydroxytoluene
  • the diluted solution is shaken for 1 hour at 145 ° C. at a rotation speed of 25 rpm, and the polyoxyalkylene polymer (A) is dissolved in the o-DCB solution to obtain a measurement sample.
  • the number average molecular weight of the polyoxyalkylene polymer (A) can be measured by the GPC method using this measurement sample.
  • the number average molecular weight in the polyoxyalkylene polymer (A) can be measured by, for example, the following measuring apparatus and measuring conditions.
  • Product name "HLC-8121GPC / HT" manufactured by TOSOH Measurement conditions Column: TSKgelGMHHR-H (20) HT ⁇ 3 TSKguardcolumn-HHR (30) HT ⁇ 1
  • Detector Blythe refractometer Standard material: Polystyrene (Molecular weight: 500-8420000, manufactured by TOSOH) Elution conditions: 145 ° C
  • the measurement of the weight average molecular weight of the (meth) acrylate polymer (B) described later can also be performed by the same method as the method for measuring the number average molecular weight of the polyoxyalkylene polymer (A) described above.
  • the viscosity at 25 ° C. of the polyoxyalkylene polymer (A) is preferably 1,000 to 30,000 mPa ⁇ s, more preferably 4,000 to 25,000 mPa ⁇ s, and 5,000 to 15,000 mPa ⁇ s. Is particularly preferred. According to the polyoxyalkylene polymer (A) having a viscosity of 1,000 mPa ⁇ s or more, the adhesive force, mechanical strength, and extensibility of the cured product of the curable composition can be further improved.
  • the viscosity of the curable composition can be kept low, whereby excellent coating of the curable composition is achieved. Sex can be secured.
  • the viscosity of the polyoxyalkylene polymer (A) at 25 ° C. can be measured as follows. First, the polyoxyalkylene polymer (A) is allowed to stand at 25 ° C. for 24 hours, and then, according to JIS K7117-1, using a B-type viscometer under the condition of a rotation speed of 10 rpm. Thus, the viscosity of the polyoxyalkylene polymer (A) can be measured.
  • polyoxyalkylene polymer (A) containing a trimethoxysilyl group a commercially available product can be used.
  • a polyoxyalkylene polymer having a main chain skeleton of polyoxypropylene and having a trimethoxysilyl group at the end of the main chain skeleton and no urethane bond Exastar A2551 manufactured by Asahi Glass Co., Ltd .; Examples include Silyl SAX510, SAX520, SAX530, and SAX580 manufactured by Kaneka Corporation.
  • Desmosal (registered trademark) XP2749 manufactured by Bayer Corporation can be used as a polyoxyalkylene polymer having a main chain skeleton of polyoxypropylene and having a trimethoxysilyl group at the end of the main chain skeleton via a urethane bond.
  • Desmosal (registered trademark) XP2749 manufactured by Bayer Corporation can be used as a polyoxyalkylene polymer having a main chain skeleton of polyoxypropylene and having a trimethoxysilyl group at the end of the main chain skeleton via a urethane bond.
  • the (meth) acrylate polymer (B) has a hydrolyzable silyl group.
  • the hydrolyzable silyl group is a group in which 1 to 3 hydrolyzable groups are bonded to a silicon atom. According to the (meth) acrylate polymer (B), the adhesion of the curable composition is improved without inhibiting the improvement of the curing rate of the curable composition by the polyoxyalkylene polymer (A). Can do.
  • the hydrolyzable group of the hydrolyzable silyl group is not particularly limited, and examples thereof include a hydrogen atom, a halogen atom, an alkoxy group, an acyloxy group, a ketoximate group, an amino group, an amide group, an acid amide group, an aminooxy group, and a mercapto group. Group, an alkenyloxy group, and the like.
  • an alkoxysilyl group is preferable because the curing rate of the curable composition can be improved.
  • alkoxysilyl groups include trialkoxysilyl groups such as trimethoxysilyl group, triethoxysilyl group, triisopropoxysilyl group, and triphenoxysilyl group; dimethoxysilyl groups such as dimethoxymethylsilyl group and diethoxymethylsilyl group and monoalkoxysilyl groups such as a methoxydimethoxysilyl group and an ethoxydimethylsilyl group.
  • a trialkoxysilyl group is more preferable, and a trimethoxysilyl group is particularly preferable.
  • the main chain skeleton of the (meth) acrylate polymer (B) is a copolymer of ethyl (meth) acrylate and n-butyl (meth) acrylate, or a copolymer of methyl (meth) acrylate and n-butyl (meth) acrylate.
  • the adhesiveness of the curable composition can be improved without inhibiting the improvement of the curing rate of the curable composition by the polyoxyalkylene polymer (A). It can be improved further.
  • the main chain skeleton of the (meth) acrylate polymer (B) is preferably a copolymer of ethyl acrylate and n-butyl acrylate.
  • (meth) acrylate means a methacrylate or an acrylate.
  • the polymerization method of the (meth) acrylate polymer (B) is not particularly limited, and a known method can be used.
  • a free radical polymerization method an anionic polymerization method, a cationic polymerization method, a UV radical polymerization method, Various polymerization methods such as a living anionic polymerization method, a living cation polymerization method, and a living radical polymerization method may be mentioned.
  • the method for introducing the hydrolyzable silyl group into the (meth) acrylate polymer (B) is not particularly limited.
  • a copolymer of ethyl (meth) acrylate and n-butyl (meth) acrylate, or methyl It is possible to use a method of hydrosilylation by introducing a hydrosilane having a hydrolyzable silyl group after introducing an unsaturated group into the molecule of the copolymer of (meth) acrylate and n-butyl (meth) acrylate. it can.
  • the weight average molecular weight of the (meth) acrylate polymer (B) is preferably 2,000 to 50,000, more preferably 2,500 to 10,000, and particularly preferably 2,500 to 5,000. According to the (meth) acrylate polymer (B) having a weight average molecular weight of 2,000 or more, it is possible to further improve the adhesive strength, mechanical strength, and extensibility of the cured product of the curable composition. In addition, according to the (meth) acrylate polymer (B) having a weight average molecular weight of 50,000 or less, the viscosity of the curable composition can be kept low, whereby an excellent coating of the curable composition can be achieved. Workability can be secured.
  • the content of the (meth) acrylate polymer (B) in the curable composition is 10 to 100 parts by weight with respect to 100 parts by weight of the polyoxyalkylene polymer (A), but 10 to 60 parts by weight. Part is preferable, and 30 to 50 parts by weight is more preferable.
  • the adhesiveness of the curable composition can be sufficiently improved.
  • the high cure rate of a curable composition is securable by making content of the (meth) acrylate type polymer (B) in a curable composition into 100 weight part or less.
  • the curable composition of the present invention contains a dioctyltin compound as a silanol condensation catalyst.
  • the silanol condensation catalyst is a catalyst for promoting a dehydration condensation reaction between silanol groups.
  • the silanol group means a hydroxy group ( ⁇ Si—OH) directly bonded to a silicon atom.
  • the silanol group is formed by hydrolyzing a hydrolyzable silyl group such as a trimethoxysilyl group.
  • Dioctyltin compounds include dioctyltin diacetate, dioctyltin monodecanate, dioctyltin bisethoxysilicate, dioctyltin diacetate, dioctyltin monodecanate, dioctyltin bisethoxysilicate, reaction product of dioctyltin oxide and alkoxysilane compound, and dioctyl The reaction material of a tin dicarboxylate and an alkoxysilane compound is also mentioned. According to these dioctyltin compounds, the adhesiveness and storage stability of the curable composition can be improved.
  • a dioctyl tin compound may be used independently or 2 or more types may be used together.
  • examples of the alkoxysilane compound include tetraalkoxysilanes such as tetramethoxysilane, tetraethoxysilane, tetrapropoxysilane, tetraisopropoxysilane, and tetrabutoxysilane, and hydrolysates thereof.
  • Monoalkyltrialkoxysilanes such as triethoxymethylsilane, triethoxyethylsilane, triethoxypropylsilane, triethoxyisopropylsilane, triethoxybutylsilane and hydrolysates thereof; diethoxydimethylsilane, diethoxydiethylsilane, diethoxy; Dialkyl dialkoxysilanes and their hydrolysates such as dipropylsilane, diethoxydiisopropylsilane, and diethoxydibutylsilane; Chirushiran, ethoxy triethylsilane, triethoxy propyl silane, ethoxy triisopropylsilane, and the like trialkyl monoalkoxysilanes and hydrolysates thereof such as ethoxy tributyl silane.
  • a reaction product of dioctyltin oxide and an alkoxysilane compound is formed by a reaction between a group represented by —Sn ( ⁇ O) — in dioctyltin oxide and an alkoxy group bonded to a silicon atom in the alkoxysilane compound. It is a compound.
  • a reaction product of dioctyltin oxide and an alkoxysilane compound specifically, dioctyltin oxybisethoxysilicate, dioctyltin oxybismethoxysilicate, dioctyltin bis (triethoxysilicate), and dioctyltin bis (trimethoxysilicate) Etc.
  • examples of dioctyltin dicarboxylate include dioctyltin diacetate, dioctyltin dilaurate, and dioctyltin distearate.
  • the alkoxysilane compound may be the same as the alkoxysilane compound described above in the reaction product of dioctyltin oxide and alkoxysilane compound.
  • a reaction product of dioctyltin dicarboxylate and an alkoxysilane compound is a compound formed by a reaction between a carboxylate group in dioctyltin dicarboxylate and an alkoxy group bonded to a silicon atom in the alkoxysilane compound. is there.
  • a reaction product of dioctyltin dicarboxylate and alkoxysilane compound specifically, dioctyltin oxybisethoxysilicate, dioctyltin oxybismethoxysilicate, dioctyltin bis (triethoxysilicate), dioctyltin bis (trimethoxysilicate) ) And the like.
  • dioctyltin compound a dioctyltin diacetate, a reaction product of dioctyltin oxide and an alkoxysilane compound is preferable, a reaction product of dioctyltin oxide and an alkoxysilane compound is more preferable, dioctyltin oxybisethoxysilicate, And dioctyltin bis (triethoxysilicate) are particularly preferred.
  • the content of the dioctyltin compound in the curable composition is preferably 1 to 10 parts by weight and more preferably 1 to 5 parts by weight with respect to 100 parts by weight of the polyoxyalkylene polymer (A).
  • the curable composition of the present invention preferably further contains an aminosilane coupling agent.
  • the aminosilane coupling agent means a compound having a silicon atom having an alkoxy group bonded in one molecule and a functional group containing a nitrogen atom.
  • aminosilane coupling agents include 3-aminopropyltrimethoxysilane, 3-aminopropylmethyldimethoxysilane, 3-aminopropyltriethoxysilane, and N-2- (aminoethyl) -3-aminopropyltrimethoxy.
  • aminosilane coupling agents include 3-aminopropyltrimethoxysilane, N-2- (aminoethyl) -3-aminopropyltrimethoxysilane, and N-2- (aminoethyl) -3-aminopropyltrimethyl. Ethoxysilane is preferred, and N-2- (aminoethyl) -3-aminopropyltrimethoxysilane is more preferred. According to these aminosilane coupling agents, a synergistic effect with the (meth) acrylate polymer (B) can be easily obtained, and the adhesiveness of the curable composition can be further improved.
  • the content of the aminosilane coupling agent in the curable composition is preferably 0.5 to 10 parts by weight and more preferably 1 to 5 parts by weight with respect to 100 parts by weight of the polyoxyalkylene polymer (A).
  • the curable composition of the present invention preferably further contains a dehydrating agent. According to the dehydrating agent, when the curable composition is stored, the curable composition can be prevented from being cured by moisture contained in the air.
  • dehydrating agents include silane compounds such as vinyltrimethoxysilane, dimethyldimethoxysilane, tetraethoxysilane, methyltrimethoxysilane, methyltriethoxysilane, tetramethoxysilane, phenyltrimethoxysilane, and diphenyldimethoxysilane; and methyl orthoformate And ester compounds such as ethyl orthoformate, methyl orthoacetate, and ethyl orthoacetate.
  • dehydrating agents may be used alone or in combination of two or more. Of these, vinyltrimethoxysilane is preferable.
  • the content of the dehydrating agent in the curable composition is preferably 0.5 to 20 parts by weight, more preferably 5 to 20 parts by weight, with respect to 100 parts by weight of the polyoxyalkylene polymer (A). 12 parts by weight is particularly preferred.
  • the curable composition of the present invention preferably further contains a filler. According to the filler, a curable composition capable of obtaining a cured product having excellent mechanical strength can be provided.
  • filler examples include calcium carbonate, magnesium carbonate, calcium oxide, hydrous silicic acid, anhydrous silicic acid, finely divided silica, calcium silicate, titanium dioxide, clay, talc, carbon black, and glass balloon. These fillers may be used alone or in combination of two or more. Of these, calcium carbonate is preferably used.
  • the average particle size of calcium carbonate is preferably 0.01 to 5 ⁇ m, more preferably 0.05 to 2.5 ⁇ m. According to the calcium carbonate having such an average particle size, a cured product having excellent mechanical strength and extensibility can be obtained, and a curable composition having excellent adhesiveness can be obtained. Can be provided.
  • Calcium carbonate is preferably surface-treated with a fatty acid or a fatty acid ester. According to the calcium carbonate surface-treated with a fatty acid, a fatty acid ester, or the like, thixotropic properties can be imparted to the curable composition and aggregation of calcium carbonate can be suppressed.
  • the content of the filler in the curable composition is preferably 1 to 700 parts by weight and more preferably 10 to 200 parts by weight with respect to 100 parts by weight of the polyoxyalkylene polymer (A).
  • the curable composition of the present invention preferably further contains a weathering stabilizer.
  • a weathering stabilizer include an antioxidant, an ultraviolet absorber, and a light stabilizer.
  • a weathering stabilizer may be used individually by 1 type, and may use 2 or more types together.
  • antioxidants examples include hindered phenolic antioxidants, monophenolic antioxidants, bisphenolic antioxidants, and polyphenolic antioxidants. Of these, hindered phenol antioxidants are preferred. Specific examples of hindered phenol antioxidants include pentaerythritol tetrakis [3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate] (melting point: 118 ° C.), octadecyl-3- (3 , 5-di-tert-butyl-4-hydroxyphenyl) propionate] (melting point 52 ° C.), and N, N′-hexane-1,6-diylbis [3- (3,5-di-tert-butyl-4 -Hydroxyphenylpropionamide)] (melting point: 158 ° C.), and octyl 3- (4-hydroxy-3,5-diisopropylphenyl) propionate (melting point: 5
  • the content of the antioxidant in the curable composition is preferably 0.1 to 20 parts by weight, more preferably 0.3 to 10 parts by weight with respect to 100 parts by weight of the polyoxyalkylene polymer (A). .
  • UV absorbers examples include benzotriazole UV absorbers and benzophenone UV absorbers. Of these, benzotriazole-based ultraviolet absorbers are preferred. Specific examples of the benzotriazole ultraviolet absorber include 2- (2H-benzotriazol-2-yl) -p-cresol (melting point 130 ° C.), 2- (2H-benzotriazol-2-yl) -4- 6-bis (1-methyl-1-phenylethyl) phenol (melting point 139 ° C.), 2- [5-chloro (2H) -benzotriazol-2-yl] -4-methyl-6- (tert-butyl) phenol (Melting point 139 ° C.), 2- (2H-benzotriazol-2-yl) -4,6-di-tert-pentylphenol (melting point 84 ° C.), and 2- (2H-benzotriazol-2-yl) -4 -(1,1,3,3-tetramethylbutyl) phenol (mel
  • the content of the ultraviolet absorber in the curable composition is preferably 0.1 to 20 parts by weight, and more preferably 0.1 to 10 parts by weight with respect to 100 parts by weight of the polyoxyalkylene polymer (A). .
  • light stabilizers include hindered amine light stabilizers. Specifically, a mixture of bis (1,2,2,6,6-pentamethyl-4-piperidyl) sebacate and methyl 1,2,2,6,6-pentamethyl-4-piperidyl sebacate (melting point: 10 ° C.
  • the content of the light stabilizer in the curable composition is preferably 0.1 to 20 parts by weight, more preferably 0.1 to 10 parts by weight with respect to 100 parts by weight of the polyoxyalkylene polymer (A). .
  • the melting point of the weather resistance stabilizer is preferably 10 ° C. or less, more preferably ⁇ 20 to 10 ° C., and particularly preferably ⁇ 20 to 5 ° C. According to the weather stabilizer having a melting point of 10 ° C. or lower, excellent adhesiveness can be imparted to the curable composition.
  • the melting point of the weather stabilizer means the melting point of each weather stabilizer.
  • the melting point of the weather stabilizer is a value measured by a visual method according to JIS K0064 (1922).
  • the curable composition of the present invention may contain other additives such as a thixotropic agent, a pigment, a dye, and an anti-settling agent, a solvent, and the like in addition to the components described above.
  • Another additive and solvent may be used individually by 1 type, and may use 2 or more types together.
  • the thixotropic agent may be any one that can express thixotropic properties in the curable composition.
  • Preferred examples of the thixotropic agent include hydrogenated castor oil, fatty acid bisamide, and fumed silica.
  • the content of the thixotropic agent in the curable composition is preferably 0.1 to 200 parts by weight and more preferably 1 to 150 parts by weight with respect to 100 parts by weight of the polyoxyalkylene polymer (A).
  • Production of the curable composition of the present invention includes a polyoxyalkylene polymer (A) containing a trimethoxysilyl group, a (meth) acrylate polymer (B) containing a hydrolyzable silyl group, and a dioctyltin compound.
  • A polyoxyalkylene polymer
  • B (meth) acrylate polymer
  • dioctyltin compound e.g., a dioctyltin compound.
  • other additives and solvents can be mixed by a predetermined weight ratio. Mixing is preferably performed under reduced pressure.
  • the curable composition of the present invention is rapidly cured by moisture in the air or moisture contained in the adherend, and forms a cured product having excellent adhesion to various substrates.
  • a substrate is not particularly limited, and is a fluorine resin, vinyl chloride resin, vinylidene chloride resin, polyethylene resin, polypropylene resin, polystyrene resin, ABS resin, polyamide resin, polyester resin, polyurethane resin, polyvinyl alcohol resin, Synthetic resin board containing synthetic resin such as ethylene-vinyl acetate copolymer resin, chlorinated polypropylene resin, and melamine resin; natural wood, plywood, medium density fiber board (MDF) particle board, rigid fiber board, semi-rigid fiber board, And wood such as laminated wood; inorganic boards; and metal plates containing metals such as aluminum, iron, stainless steel, and steel sheets.
  • MDF medium density fiber board
  • examples of the base material include a synthetic resin-coated metal plate in which at least a part of the surface of the metal plate is coated with a synthetic resin.
  • examples of the synthetic resin used for the synthetic resin-coated metal plate include polyvinyl chloride resin, polyolefin resin, polyester resin, and fluorine resin.
  • examples of the metal plate used for the synthetic resin-coated metal plate include metal plates made of metals such as aluminum, iron, stainless steel, and steel plates.
  • the curable composition of this invention is used suitably for base materials, such as a synthetic resin board and a synthetic resin coating metal plate.
  • base materials such as a synthetic resin board and a synthetic resin coating metal plate.
  • Conventional curable compositions have low adhesion to these substrates, and can particularly demonstrate the effects of the present invention.
  • the curable composition of the present invention since the curable composition of the present invention has excellent adhesiveness, it is used for civil engineering, architectural, vehicle, electrical products, electronic parts, miscellaneous goods, sealing agents, It can be used for various applications as a coating agent, a sealant and a sealing agent, and a coating agent and primer agent for civil engineering or building base materials.
  • a curable composition was prepared by mixing the following components in a sealed stirrer until the mixture was uniform in a sealed stirrer so as to have the blending amounts shown in Table 1, respectively.
  • Polyoxyalkylene polymer (A1) Polyoxyalkylene polymer (A1) having a main chain skeleton of polyoxypropylene and having trimethoxysilyl groups at both ends of the main chain skeleton via urethane bonds (viscosity at 25 ° C.
  • Polyoxyalkylene polymer (A2) A polyoxyalkylene polymer (A2) having a main chain skeleton of polyoxypropylene, having a trimethoxysilyl group at both ends of the main chain skeleton and having no urethane bond (number average molecular weight 25,000, 25 Viscosity at 25,000 mPa ⁇ s, Silyl SAX580 manufactured by Kaneka Corporation) [(Meth) acrylate polymer (B1)] (Meth) acrylate polymer (B1) having a trimethoxysilyl group and the main chain skeleton being a copolymer of ethyl acrylate and n-butyl acrylate (Alfone US-6170, manufactured by Toagosei Co., Ltd., weight average molecular weight) 2,800) [(Meth)
  • tack free time In accordance with JIS A5758, tack-free time (minutes) of the curable composition was measured in an environment of a temperature of 23 ° C. and a relative humidity of 50%.
  • adherend As the adherend, a lauan plywood, a stainless steel plate, and a fluororesin-coated steel plate were prepared. A curable composition is applied on each adherend in a bead shape (width 5 mm, thickness 4 mm) and cured by leaving it to stand in an atmosphere of a temperature of 23 ° C. and a relative humidity of 50% for 7 days. Got. Then, the cured product is peeled from the adherend at a tensile speed of 100 mm / min from one end to the other end in the length direction with a finger, and the destruction state of the cured product at this time is visually confirmed. did.
  • the cohesive failure of the cured product means a state in which the cured product is destroyed when the cured product is peeled from the adherend.
  • cured material means the state which peeled in the interface of a to-be-adhered body and hardened
  • test body was produced using the curable composition, and tensile adhesive strength T [N / mm ⁇ 2 >] was measured about this test body.
  • a specific measurement procedure is as follows. A mortar plate (thickness 15 mm, length 70 mm ⁇ width 70 mm) was prepared as a base sample, and a polystyrene foam heat insulating plate (thickness 5 mm, length 40 mm ⁇ width 40 mm) was prepared as a finished sample. The curable composition was applied to the entire lower surface of the finished sample so that the coating thickness was 1 mm. After the finished samples were placed on the base sample, they were left in an environment of a temperature of 23 ° C.
  • the test body by which the ground sample and the finishing sample were bonded together by the hardened
  • the test specimen was subjected to a tensile bond strength test, and the maximum load P [N] until the bonded surface was broken was measured. Then, the tensile adhesive strength T [N / mm 2 ] was calculated by dividing the maximum load P [N] by the application area W (1600 [mm 2 ]) of the curable composition.
  • the curable composition was filled in a container, sealed, and left in an atmosphere at a temperature of 23 ° C. for 1 day.
  • the viscosity T 1 [mPa ⁇ s] at 23 ° C. of the curable composition after standing was measured using a viscometer (Brookfield B8U viscometer, rotor: No. 7, rotation speed: 10 rpm).
  • the curable composition was filled in a container and sealed, and left in an atmosphere at a temperature of 50 ° C. for 28 days.
  • the viscosity T 2 [mPa ⁇ s] at 23 ° C. of the curable composition after standing was measured in the same manner as described above.
  • the curable composition of the present invention can be cured in a short time and is excellent in adhesiveness and storage stability. Therefore, such a curable composition is suitably used for bonding various adherends.

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Abstract

A curable composition according to the present invention is characterized by comprising: 100 parts by weight of a polyoxyalkylene-type polymer (A) having a trimethoxysilyl group; 10 to 100 parts by weight of a (meth)acrylate-type polymer (B) having a hydrolysable silyl group and containing a copolymer of ethyl (meth)acrylate and n-butyl (meth)acrylate or a copolymer of methyl (meth)acrylate and n-butyl (meth)acrylate in the main chain backbone; and a dioctyltin compound.

Description

硬化性組成物Curable composition
 本発明は、短時間で硬化することができると共に、接着性及び貯蔵安定性にも優れている硬化性組成物に関する。 The present invention relates to a curable composition that can be cured in a short time and is excellent in adhesiveness and storage stability.
 従来から、架橋可能な加水分解性シリル基を有する重合体を主成分として含有する硬化性組成物が知られている。硬化性組成物は、塗料、コーティング剤、接着剤、感圧接着剤、シーラント及びシーリング材などとして様々な用途に用いられている。 Conventionally, curable compositions containing a polymer having a crosslinkable hydrolyzable silyl group as a main component are known. Curable compositions are used in various applications as paints, coating agents, adhesives, pressure sensitive adhesives, sealants and sealants.
 雰囲気又は被着体中に含まれている湿気により、重合体が有している架橋可能な加水分解性シリル基が加水分解した後に脱水縮合し、これにより硬化性組成物は硬化して、接着力に優れた硬化物を形成する。 The crosslinkable hydrolyzable silyl group of the polymer is hydrolyzed by the atmosphere or moisture contained in the adherend, followed by dehydration condensation, whereby the curable composition is cured and bonded. Forms a cured product with excellent strength.
 しかしながら、従来の硬化性組成物は硬化性が低く、硬化に要する時間が長いという問題があった。そこで、特許文献1では、架橋可能な加水分解性シリル基を有するポリオキシアルキレン系重合体を含んでいる硬化性組成物が開示されている。ポリオキシアルキレン系重合体を用いることによって、短時間で硬化することが可能な硬化性組成物を提供できる。 However, conventional curable compositions have a problem of low curability and a long time for curing. Therefore, Patent Document 1 discloses a curable composition containing a polyoxyalkylene polymer having a crosslinkable hydrolyzable silyl group. By using a polyoxyalkylene polymer, a curable composition that can be cured in a short time can be provided.
特開2008-280435号公報JP 2008-280435 A
 しかしながら、特許文献1の硬化性組成物は、短時間で硬化することができるものの接着性が低かった。そのため、硬化性組成物の硬化物は、各種基材に対する接着力が十分ではなかった。 However, although the curable composition of Patent Document 1 can be cured in a short time, it has low adhesion. For this reason, the cured product of the curable composition does not have sufficient adhesion to various substrates.
 さらに、特許文献1の硬化性組成物は貯蔵安定性が低い。硬化性組成物は、一般的に、製造後に倉庫や店頭などにおいて数カ月間に亘って保管されることが多い。特許文献1の硬化性組成物を長期間に亘って保管した場合、硬化性組成物の粘度が急激に上昇して、塗工が困難となる可能性が高い。 Furthermore, the curable composition of Patent Document 1 has low storage stability. In general, the curable composition is often stored for several months in a warehouse or a storefront after the production. When the curable composition of Patent Document 1 is stored for a long period of time, the viscosity of the curable composition is rapidly increased and coating is likely to be difficult.
 したがって、本発明は、短時間で硬化することができると共に、接着性及び貯蔵安定性にも優れている硬化性組成物を提供することを目的とする。 Therefore, an object of the present invention is to provide a curable composition that can be cured in a short time and is excellent in adhesion and storage stability.
 本発明の硬化性組成物は、トリメトキシシリル基を有するポリオキシアルキレン系重合体(A)100重量部、加水分解性シリル基を有し、且つ主鎖骨格にエチル(メタ)アクリレート及びn-ブチル(メタ)アクリレートの共重合体、又はメチル(メタ)アクリレート及びn-ブチル(メタ)アクリレートの共重合体を含む(メタ)アクリレート系重合体(B)10~100重量部、及びジオクチル錫化合物を含有することを特徴とする。 The curable composition of the present invention comprises 100 parts by weight of a polyoxyalkylene polymer (A) having a trimethoxysilyl group, a hydrolyzable silyl group, and ethyl (meth) acrylate and n- Copolymer of butyl (meth) acrylate, or (meth) acrylate polymer (B) containing a copolymer of methyl (meth) acrylate and n-butyl (meth) acrylate, and dioctyltin compound It is characterized by containing.
 [ポリオキシアルキレン系重合体(A)]
 ポリオキシアルキレン系重合体(A)は、トリメトキシシリル基(-Si(OCH3)3)を有している。ポリオキシアルキレン系重合体(A)の主鎖骨格は、式:-(R-O)n-(式中、Rは炭素数が1~14のアルキレン基を表し、nは繰り返し単位の数であって正の整数である。)で表される繰り返し単位を含有する重合体を含んでいることが好ましい。ポリオキシアルキレン系重合体の主鎖骨格は一種のみの繰り返し単位からなっていてもよいし、二種以上の繰り返し単位からなっていてもよい。このような主鎖骨格を有しているポリオキシアルキレン系重合体(A)によれば、硬化性組成物の硬化速度を向上させることができる。
[Polyoxyalkylene polymer (A)]
The polyoxyalkylene polymer (A) has a trimethoxysilyl group (—Si (OCH 3 ) 3 ). The main chain skeleton of the polyoxyalkylene polymer (A) has the formula: — (RO) n — (wherein R represents an alkylene group having 1 to 14 carbon atoms, and n is the number of repeating units. It is preferable that the polymer contains a repeating unit represented by the following formula: The main chain skeleton of the polyoxyalkylene polymer may be composed of only one type of repeating unit, or may be composed of two or more types of repeating units. According to the polyoxyalkylene polymer (A) having such a main chain skeleton, the curing rate of the curable composition can be improved.
 ポリオキシアルキレン系重合体(A)の主鎖骨格としては、ポリオキシエチレン、ポリオキシプロピレン、ポリオキシブチレン、ポリオキシテトラメチレン、ポリオキシエチレン-ポリオキシプロピレン共重合体、及びポリオキシプロピレン-ポリオキシブチレン共重合体などが挙げられる。なかでも、ポリオキシプロピレンが好ましい。ポリオキシプロピレンによれば、硬化性組成物の硬化速度を向上できるだけでなく、硬化性組成物の接着性を向上させることもでき、さらに硬化性組成物を硬化させて得られる硬化物に優れた柔軟性及び伸び性を付与することができる。 The main chain skeleton of the polyoxyalkylene polymer (A) includes polyoxyethylene, polyoxypropylene, polyoxybutylene, polyoxytetramethylene, polyoxyethylene-polyoxypropylene copolymer, and polyoxypropylene-poly Examples thereof include oxybutylene copolymers. Of these, polyoxypropylene is preferable. According to polyoxypropylene, not only can the curing rate of the curable composition be improved, but also the adhesiveness of the curable composition can be improved, and the cured product obtained by curing the curable composition is excellent. Flexibility and extensibility can be imparted.
 ポリオキシアルキレン系重合体(A)は、トリメトキシシリル基の他に、ウレタン結合をさらに有していることが好ましい。ウレタン結合は、トリメトキシシリル基の加水分解反応及び脱水縮合反応を促進させて、硬化性組成物の硬化速度を向上させることができる。さらに、ウレタン結合は、ポリオキシアルキレン系重合体(A)に極性を付与することができ、これにより硬化性組成物の接着性を向上させることも可能となる。 The polyoxyalkylene polymer (A) preferably further has a urethane bond in addition to the trimethoxysilyl group. The urethane bond can promote the hydrolysis reaction and dehydration condensation reaction of the trimethoxysilyl group, thereby improving the curing rate of the curable composition. Furthermore, the urethane bond can impart polarity to the polyoxyalkylene polymer (A), thereby improving the adhesiveness of the curable composition.
 ポリオキシアルキレン系重合体(A)は、主鎖骨格の両末端にウレタン結合を介してトリメトキシシリル基を有していることが好ましい。トリメトキシシリル基の近傍にウレタン結合を有しているポリオキシアルキレン系重合体(A)によれば、硬化性組成物の硬化速度及び接着性のさらなる向上が図れる。 The polyoxyalkylene polymer (A) preferably has a trimethoxysilyl group at both ends of the main chain skeleton via urethane bonds. According to the polyoxyalkylene polymer (A) having a urethane bond in the vicinity of the trimethoxysilyl group, the curing rate and adhesiveness of the curable composition can be further improved.
 主鎖骨格の両末端にウレタン結合を介してトリメトキシシリル基を有するポリオキシアルキレン系重合体(A)は、例えば、ポリオキシアルキレン鎖の両末端にヒドロキシ基を有するプレポリマーと、トリメトキシシリル基及びイソシアネート基を有する化合物とを反応させることにより得られる。 A polyoxyalkylene polymer (A) having a trimethoxysilyl group via urethane bonds at both ends of the main chain skeleton includes, for example, a prepolymer having hydroxy groups at both ends of the polyoxyalkylene chain, and trimethoxysilyl It is obtained by reacting a compound having a group and an isocyanate group.
 ポリオキシアルキレン鎖の両末端にヒドロキシ基を有するプレポリマーとしては、ポリ(オキシエチレン)グリコール、ポリ(オキシプロピレン)グリコール、ポリ(オキシブチレン)グリコール、ポリ(オキシテトラメチレン)グリコール、ポリ(オキシエチレン)-ポリ(オキシプロピレン)グリコール、及びポリ(オキシプロピレン)-ポリ(オキシブチレン)グリコールなどが挙げられる。 Examples of prepolymers having hydroxy groups at both ends of the polyoxyalkylene chain include poly (oxyethylene) glycol, poly (oxypropylene) glycol, poly (oxybutylene) glycol, poly (oxytetramethylene) glycol, and poly (oxyethylene). ) -Poly (oxypropylene) glycol and poly (oxypropylene) -poly (oxybutylene) glycol.
 トリメトキシシリル基及びイソシアネート基を有する化合物としては、1-イソシアネートメチルトリメトキシシラン、2-イソシアネートエチルトリメトキシシラン、3-イソシアネートプロピルトリメトキシシラン、3-イソシアネートブチルトリメトキシシラン、3-イソシアネートペンチルトリメトキシシラン、及び1-イソシアネートプロピルトリメトキシシランなどが挙げられる。 Examples of the compound having a trimethoxysilyl group and an isocyanate group include 1-isocyanate methyltrimethoxysilane, 2-isocyanateethyltrimethoxysilane, 3-isocyanatepropyltrimethoxysilane, 3-isocyanatebutyltrimethoxysilane, 3-isocyanatepentyltril. Examples include methoxysilane and 1-isocyanatopropyltrimethoxysilane.
 ポリオキシアルキレン鎖の両末端にウレタン結合を介してトリメトキシシリル基を有するポリオキシアルキレン系重合体(A)を合成するには、ポリオキシアルキレン鎖の両末端にヒドロキシ基を有するプレポリマーと、トリメトキシシリル基及びイソシアネート基を有する化合物とを混合して混合物を得、この混合物を撹拌して上記プレポリマーのヒドロキシ基と、上記化合物のイソシアネート基とを反応させてウレタン結合を形成させることにより行うことができる。また、上記混合物を加熱しながら撹拌することにより、反応を促進させることができる。 In order to synthesize a polyoxyalkylene polymer (A) having a trimethoxysilyl group via a urethane bond at both ends of the polyoxyalkylene chain, a prepolymer having hydroxy groups at both ends of the polyoxyalkylene chain; By mixing a compound having a trimethoxysilyl group and an isocyanate group to obtain a mixture, and stirring the mixture to react the hydroxy group of the prepolymer with the isocyanate group of the compound to form a urethane bond. It can be carried out. Moreover, reaction can be accelerated | stimulated by stirring the said mixture, heating.
 ポリオキシアルキレン系重合体(A)の数平均分子量は、5,000~50,000が好ましく、8,000~30,000がより好ましく、8,000~20,000が特に好ましい。数平均分子量が5,000以上であるポリオキシアルキレン系重合体(A)によれば、硬化性組成物の硬化物の接着力、機械的強度及び伸び性をさらに向上させることができる。また、数平均分子量が50,000以下であるポリオキシアルキレン系重合体(A)によれば、硬化性組成物の粘度を低く維持することができ、これにより硬化性組成物の優れた塗工性を確保することができる。 The number average molecular weight of the polyoxyalkylene polymer (A) is preferably 5,000 to 50,000, more preferably 8,000 to 30,000, and particularly preferably 8,000 to 20,000. According to the polyoxyalkylene polymer (A) having a number average molecular weight of 5,000 or more, it is possible to further improve the adhesive force, mechanical strength, and extensibility of the cured product of the curable composition. In addition, according to the polyoxyalkylene polymer (A) having a number average molecular weight of 50,000 or less, the viscosity of the curable composition can be kept low, whereby excellent coating of the curable composition can be achieved. Sex can be secured.
 なお、本発明において、ポリオキシアルキレン系重合体(A)の数平均分子量の測定は、GPC(ゲルパーミエーションクロマトグラフィー)法を用いて、ポリスチレンによって換算することにより行われる。具体的には、ポリオキシアルキレン系重合体(A)6~7mgを試験管に供給した後、試験管に0.05重量%のジブチルヒドロキシトルエン(BHT)を含むオルトジクロロベンゼン(o-DCB)溶液を加えて、ポリオキシアルキレン系重合体(A)の濃度が1mg/mLである希釈液を作製する。 In the present invention, the number average molecular weight of the polyoxyalkylene polymer (A) is measured by conversion with polystyrene using a GPC (gel permeation chromatography) method. Specifically, after 6-7 mg of polyoxyalkylene polymer (A) is supplied to a test tube, orthodichlorobenzene (o-DCB) containing 0.05% by weight of dibutylhydroxytoluene (BHT) in the test tube The solution is added to prepare a diluted solution having a polyoxyalkylene polymer (A) concentration of 1 mg / mL.
 溶解濾過装置を用いて145℃にて回転速度25rpmにて1時間に亘って希釈液を振とうさせて、ポリオキシアルキレン系重合体(A)をo-DCB溶液に溶解させて測定試料を得る。この測定試料を用いてGPC法によってポリオキシアルキレン系重合体(A)の数平均分子量を測定することができる。 Using a dissolution filter, the diluted solution is shaken for 1 hour at 145 ° C. at a rotation speed of 25 rpm, and the polyoxyalkylene polymer (A) is dissolved in the o-DCB solution to obtain a measurement sample. . The number average molecular weight of the polyoxyalkylene polymer (A) can be measured by the GPC method using this measurement sample.
 ポリオキシアルキレン系重合体(A)における数平均分子量は、例えば、下記測定装置及び測定条件にて測定することができる。
測定装置 TOSOH社製 商品名「HLC-8121GPC/HT」
測定条件 カラム:TSKgelGMHHR-H(20)HT×3本
         TSKguardcolumn-HHR(30)HT×1本
     移動相:o-DCB 1.0mL/分
     サンプル濃度:1mg/mL
     検出器:ブライス型屈折計
     標準物質:ポリスチレン(TOSOH社製 分子量:500~8420000)
     溶出条件:145℃
     SEC温度:145℃
The number average molecular weight in the polyoxyalkylene polymer (A) can be measured by, for example, the following measuring apparatus and measuring conditions.
Product name "HLC-8121GPC / HT" manufactured by TOSOH
Measurement conditions Column: TSKgelGMHHR-H (20) HT × 3 TSKguardcolumn-HHR (30) HT × 1 Mobile phase: o-DCB 1.0 mL / min Sample concentration: 1 mg / mL
Detector: Blythe refractometer Standard material: Polystyrene (Molecular weight: 500-8420000, manufactured by TOSOH)
Elution conditions: 145 ° C
SEC temperature: 145 ° C
 なお、後述する(メタ)アクリレート系重合体(B)の重量平均分子量の測定も、上述したポリオキシアルキレン系重合体(A)の数平均分子量の測定方法と同じ方法により行うことができる。 In addition, the measurement of the weight average molecular weight of the (meth) acrylate polymer (B) described later can also be performed by the same method as the method for measuring the number average molecular weight of the polyoxyalkylene polymer (A) described above.
 ポリオキシアルキレン系重合体(A)の25℃における粘度は、1,000~30,000mPa・sが好ましく、4,000~25,000mPa・sがより好ましく、5,000~15,000mPa・sが特に好ましい。粘度が1,000mPa・s以上であるポリオキシアルキレン系重合体(A)によれば、硬化性組成物の硬化物の接着力、機械的強度及び伸び性をさらに向上させることができる。また、粘度が30,000mPa・s以下であるポリオキシアルキレン系重合体(A)によれば、硬化性組成物の粘度を低く維持することができ、これにより硬化性組成物の優れた塗工性を確保することができる。 The viscosity at 25 ° C. of the polyoxyalkylene polymer (A) is preferably 1,000 to 30,000 mPa · s, more preferably 4,000 to 25,000 mPa · s, and 5,000 to 15,000 mPa · s. Is particularly preferred. According to the polyoxyalkylene polymer (A) having a viscosity of 1,000 mPa · s or more, the adhesive force, mechanical strength, and extensibility of the cured product of the curable composition can be further improved. In addition, according to the polyoxyalkylene polymer (A) having a viscosity of 30,000 mPa · s or less, the viscosity of the curable composition can be kept low, whereby excellent coating of the curable composition is achieved. Sex can be secured.
 なお、本発明において、ポリオキシアルキレン系重合体(A)の25℃における粘度は次の通りにして測定することができる。先ず、ポリオキシアルキレン系重合体(A)を25℃にて24時間に亘って放置し、その後、JIS K7117-1に準拠して、B型粘度計を用いて、回転数10rpmの条件下にてポリオキシアルキレン系重合体(A)の粘度を測定することができる。 In the present invention, the viscosity of the polyoxyalkylene polymer (A) at 25 ° C. can be measured as follows. First, the polyoxyalkylene polymer (A) is allowed to stand at 25 ° C. for 24 hours, and then, according to JIS K7117-1, using a B-type viscometer under the condition of a rotation speed of 10 rpm. Thus, the viscosity of the polyoxyalkylene polymer (A) can be measured.
 トリメトキシシリル基を含有するポリオキシアルキレン系重合体(A)は、市販されている製品を用いることができる。例えば、主鎖骨格がポリオキシプロピレンであり、主鎖骨格の末端にトリメトキシシリル基を有し且つウレタン結合を有していないポリオキシアルキレン系重合体としては、旭硝子株式会社製 エクセスターA2551;株式会社カネカ製 サイリル SAX510、SAX520、SAX530、SAX580が挙げられる。また、主鎖骨格がポリオキシプロピレンであり、主鎖骨格の末端にウレタン結合を介してトリメトキシシリル基を有しているポリオキシアルキレン系重合体としては、バイエル社製 Desmoseal(登録商標)XP2749が挙げられる。 As the polyoxyalkylene polymer (A) containing a trimethoxysilyl group, a commercially available product can be used. For example, as a polyoxyalkylene polymer having a main chain skeleton of polyoxypropylene and having a trimethoxysilyl group at the end of the main chain skeleton and no urethane bond, Exastar A2551 manufactured by Asahi Glass Co., Ltd .; Examples include Silyl SAX510, SAX520, SAX530, and SAX580 manufactured by Kaneka Corporation. In addition, as a polyoxyalkylene polymer having a main chain skeleton of polyoxypropylene and having a trimethoxysilyl group at the end of the main chain skeleton via a urethane bond, Desmosal (registered trademark) XP2749 manufactured by Bayer Corporation can be used. Is mentioned.
 [(メタ)アクリレート系重合体(B)]
 (メタ)アクリレート系重合体(B)は加水分解性シリル基を有している。加水分解性シリル基とは、珪素原子に1~3個の加水分解性基が結合している基である。(メタ)アクリレート系重合体(B)によれば、ポリオキシアルキレン系重合体(A)による硬化性組成物の硬化速度の向上を阻害することなく、硬化性組成物の接着性を向上させることができる。
[(Meth) acrylate polymer (B)]
The (meth) acrylate polymer (B) has a hydrolyzable silyl group. The hydrolyzable silyl group is a group in which 1 to 3 hydrolyzable groups are bonded to a silicon atom. According to the (meth) acrylate polymer (B), the adhesion of the curable composition is improved without inhibiting the improvement of the curing rate of the curable composition by the polyoxyalkylene polymer (A). Can do.
 加水分解性シリル基の加水分解性基としては、特に限定されず、例えば、水素原子、ハロゲン原子、アルコキシ基、アシルオキシ基、ケトキシメート基、アミノ基、アミド基、酸アミド基、アミノオキシ基、メルカプト基、及びアルケニルオキシ基などが挙げられる。 The hydrolyzable group of the hydrolyzable silyl group is not particularly limited, and examples thereof include a hydrogen atom, a halogen atom, an alkoxy group, an acyloxy group, a ketoximate group, an amino group, an amide group, an acid amide group, an aminooxy group, and a mercapto group. Group, an alkenyloxy group, and the like.
 なかでも、加水分解性シリル基としては、硬化性組成物の硬化速度を向上させることができることから、アルコキシシリル基が好ましい。アルコキシシリル基としては、トリメトキシシリル基、トリエトキシシリル基、トリイソプロポキシシリル基、及びトリフェノキシシリル基などのトリアルコキシシリル基;ジメトキシメチルシリル基、及びジエトキシメチルシリル基などのジメトキシシリル基;並びに、メトキシジメトキシシリル基、及びエトキシジメチルシリル基などのモノアルコキシシリル基が挙げられる。なかでも、トリアルコキシシリル基がより好ましく、トリメトキシシリル基が特に好ましい。 Among these, as the hydrolyzable silyl group, an alkoxysilyl group is preferable because the curing rate of the curable composition can be improved. Examples of alkoxysilyl groups include trialkoxysilyl groups such as trimethoxysilyl group, triethoxysilyl group, triisopropoxysilyl group, and triphenoxysilyl group; dimethoxysilyl groups such as dimethoxymethylsilyl group and diethoxymethylsilyl group And monoalkoxysilyl groups such as a methoxydimethoxysilyl group and an ethoxydimethylsilyl group. Among these, a trialkoxysilyl group is more preferable, and a trimethoxysilyl group is particularly preferable.
 (メタ)アクリレート系重合体(B)の主鎖骨格は、エチル(メタ)アクリレート及びn-ブチル(メタ)アクリレートの共重合体、又はメチル(メタ)アクリレート及びn-ブチル(メタ)アクリレートの共重合体を含む。このような(メタ)アクリレート系重合体(B)によれば、ポリオキシアルキレン系重合体(A)による硬化性組成物の硬化速度の向上を阻害することなく、硬化性組成物の接着性をより向上させることができる。なかでも、(メタ)アクリレート系重合体(B)の主鎖骨格は、エチルアクリレート及びn-ブチルアクリレートの共重合体であることが好ましい。なお、(メタ)アクリレートは、メタクリレート又はアクリレートを意味する。 The main chain skeleton of the (meth) acrylate polymer (B) is a copolymer of ethyl (meth) acrylate and n-butyl (meth) acrylate, or a copolymer of methyl (meth) acrylate and n-butyl (meth) acrylate. Including polymers. According to such a (meth) acrylate polymer (B), the adhesiveness of the curable composition can be improved without inhibiting the improvement of the curing rate of the curable composition by the polyoxyalkylene polymer (A). It can be improved further. Of these, the main chain skeleton of the (meth) acrylate polymer (B) is preferably a copolymer of ethyl acrylate and n-butyl acrylate. In addition, (meth) acrylate means a methacrylate or an acrylate.
 (メタ)アクリレート系重合体(B)の重合方法としては、特に限定されず、公知の方法を用いることができ、例えば、フリーラジカル重合法、アニオン重合法、カチオン重合法、UVラジカル重合法、リビングアニオン重合法、リビングカチオン重合法、リビングラジカル重合法などの各種重合法が挙げられる。 The polymerization method of the (meth) acrylate polymer (B) is not particularly limited, and a known method can be used. For example, a free radical polymerization method, an anionic polymerization method, a cationic polymerization method, a UV radical polymerization method, Various polymerization methods such as a living anionic polymerization method, a living cation polymerization method, and a living radical polymerization method may be mentioned.
 (メタ)アクリレート系重合体(B)への加水分解性シリル基の導入方法としては、特に限定されず、例えば、エチル(メタ)アクリレート及びn-ブチル(メタ)アクリレートの共重合体、又はメチル(メタ)アクリレート及びn-ブチル(メタ)アクリレートの共重合体に分子中に不飽和基を導入した後、加水分解性シリル基を有するヒドロシランを作用させてヒドロシリル化する方法などを利用することができる。 The method for introducing the hydrolyzable silyl group into the (meth) acrylate polymer (B) is not particularly limited. For example, a copolymer of ethyl (meth) acrylate and n-butyl (meth) acrylate, or methyl It is possible to use a method of hydrosilylation by introducing a hydrosilane having a hydrolyzable silyl group after introducing an unsaturated group into the molecule of the copolymer of (meth) acrylate and n-butyl (meth) acrylate. it can.
 (メタ)アクリレート系重合体(B)の重量平均分子量は、2,000~50,000が好ましく、2,500~10,000がより好ましく、2,500~5,000が特に好ましい。重量平均分子量が2,000以上である(メタ)アクリレート系重合体(B)によれば、硬化性組成物の硬化物の接着力、機械的強度及び伸び性をさらに向上させることができる。また、重量平均分子量が50,000以下である(メタ)アクリレート系重合体(B)によれば、硬化性組成物の粘度を低く維持することができ、これにより硬化性組成物の優れた塗工性を確保することができる。 The weight average molecular weight of the (meth) acrylate polymer (B) is preferably 2,000 to 50,000, more preferably 2,500 to 10,000, and particularly preferably 2,500 to 5,000. According to the (meth) acrylate polymer (B) having a weight average molecular weight of 2,000 or more, it is possible to further improve the adhesive strength, mechanical strength, and extensibility of the cured product of the curable composition. In addition, according to the (meth) acrylate polymer (B) having a weight average molecular weight of 50,000 or less, the viscosity of the curable composition can be kept low, whereby an excellent coating of the curable composition can be achieved. Workability can be secured.
 硬化性組成物中における(メタ)アクリレート系重合体(B)の含有量は、ポリオキシアルキレン系重合体(A)100重量部に対して、10~100重量部であるが、10~60重量部が好ましく、30~50重量部がより好ましい。硬化性組成物中における(メタ)アクリレート系重合体(B)の含有量を10重量部以上とすることにより、硬化性組成物の接着性を十分に向上させることができる。また、硬化性組成物中における(メタ)アクリレート系重合体(B)の含有量を100重量部以下とすることにより、硬化性組成物の高い硬化速度を確保することができる。 The content of the (meth) acrylate polymer (B) in the curable composition is 10 to 100 parts by weight with respect to 100 parts by weight of the polyoxyalkylene polymer (A), but 10 to 60 parts by weight. Part is preferable, and 30 to 50 parts by weight is more preferable. By setting the content of the (meth) acrylate polymer (B) in the curable composition to 10 parts by weight or more, the adhesiveness of the curable composition can be sufficiently improved. Moreover, the high cure rate of a curable composition is securable by making content of the (meth) acrylate type polymer (B) in a curable composition into 100 weight part or less.
 [シラノール縮合触媒]
 本発明の硬化性組成物は、シラノール縮合触媒として、ジオクチル錫化合物を含有している。シラノール縮合触媒とは、シラノール基同士の脱水縮合反応を促進させるための触媒である。なお、シラノール基とは、ケイ素原子に直接結合しているヒドロキシ基(≡Si-OH)を意味する。シラノール基は、トリメトキシシリル基などの加水分解性シリル基が加水分解することにより形成される。
[Silanol condensation catalyst]
The curable composition of the present invention contains a dioctyltin compound as a silanol condensation catalyst. The silanol condensation catalyst is a catalyst for promoting a dehydration condensation reaction between silanol groups. The silanol group means a hydroxy group (≡Si—OH) directly bonded to a silicon atom. The silanol group is formed by hydrolyzing a hydrolyzable silyl group such as a trimethoxysilyl group.
 ジオクチル錫化合物としては、ジオクチル錫ジアセテート、ジオクチル錫モノデカネート、ジオクチル錫ビスエトキシシリケート、ジオクチル錫ジアセテート、ジオクチル錫モノデカネート、ジオクチル錫ビスエトキシシリケート、ジオクチル錫オキサイドとアルコキシシラン化合物との反応物、及びジオクチル錫ジカルボキシレートとアルコキシシラン化合物との反応物も挙げられる。これらのジオクチル錫化合物によれば、硬化性組成物の接着性や貯蔵安定性を向上させることができる。ジオクチル錫化合物は、単独で用いられても二種以上が併用されてもよい。 Dioctyltin compounds include dioctyltin diacetate, dioctyltin monodecanate, dioctyltin bisethoxysilicate, dioctyltin diacetate, dioctyltin monodecanate, dioctyltin bisethoxysilicate, reaction product of dioctyltin oxide and alkoxysilane compound, and dioctyl The reaction material of a tin dicarboxylate and an alkoxysilane compound is also mentioned. According to these dioctyltin compounds, the adhesiveness and storage stability of the curable composition can be improved. A dioctyl tin compound may be used independently or 2 or more types may be used together.
 ジオクチル錫オキサイドとアルコキシシラン化合物との反応物において、アルコキシシラン化合物としては、テトラメトキシシラン、テトラエトキシシラン、テトラプロポキシシラン、テトライソプロポキシシラン、及びテトラブトキシシランなどのテトラアルコキシシラン及びその加水分解物;トリエトキシメチルシラン、トリエトキシエチルシラン、トリエトキシプロピルシラン、トリエトキシイソプロピルシラン、トリエトキシブチルシラン等のモノアルキルトリアルコキシシラン及びその加水分解物;ジエトキシジメチルシラン、ジエトキシジエチルシラン、ジエトキシジプロピルシラン、ジエトキシジイソプロピルシラン、及びジエトキシジブチルシランなどのジアルキルジアルコキシシラン及びその加水分解物;エトキシトリメチルシラン、エトキシトリエチルシラン、エトキシトリプロピルシラン、エトキシトリイソプロピルシラン、及びエトキシトリブチルシランなどのトリアルキルモノアルコキシシラン及びその加水分解物などが挙げられる。 In the reaction product of dioctyltin oxide and an alkoxysilane compound, examples of the alkoxysilane compound include tetraalkoxysilanes such as tetramethoxysilane, tetraethoxysilane, tetrapropoxysilane, tetraisopropoxysilane, and tetrabutoxysilane, and hydrolysates thereof. Monoalkyltrialkoxysilanes such as triethoxymethylsilane, triethoxyethylsilane, triethoxypropylsilane, triethoxyisopropylsilane, triethoxybutylsilane and hydrolysates thereof; diethoxydimethylsilane, diethoxydiethylsilane, diethoxy; Dialkyl dialkoxysilanes and their hydrolysates such as dipropylsilane, diethoxydiisopropylsilane, and diethoxydibutylsilane; Chirushiran, ethoxy triethylsilane, triethoxy propyl silane, ethoxy triisopropylsilane, and the like trialkyl monoalkoxysilanes and hydrolysates thereof such as ethoxy tributyl silane.
 ジオクチル錫オキサイドとアルコキシシラン化合物との反応物は、ジオクチル錫オキサイドにおける-Sn(=O)-で示される基と、アルコキシシラン化合物においてケイ素原子に結合しているアルコキシ基とが反応することによって形成される化合物である。ジオクチル錫オキサイドとアルコキシシラン化合物との反応物として、具体的には、ジオクチル錫オキシビスエトキシシリケート、ジオクチル錫オキシビスメトキシシリケート、ジオクチル錫ビス(トリエトキシシリケート)、及びジオクチル錫ビス(トリメトキシシリケート)などが挙げられる。 A reaction product of dioctyltin oxide and an alkoxysilane compound is formed by a reaction between a group represented by —Sn (═O) — in dioctyltin oxide and an alkoxy group bonded to a silicon atom in the alkoxysilane compound. It is a compound. As a reaction product of dioctyltin oxide and an alkoxysilane compound, specifically, dioctyltin oxybisethoxysilicate, dioctyltin oxybismethoxysilicate, dioctyltin bis (triethoxysilicate), and dioctyltin bis (trimethoxysilicate) Etc.
 ジオクチル錫ジカルボキシレートとアルコキシシラン化合物との反応物において、ジオクチル錫ジカルボキシレートとしては、ジオクチル錫ジアセテート、ジオクチル錫ジラウレート、ジオクチル錫ジステアレートなどが挙げられる。また、ジオクチル錫ジカルボキシレートとアルコキシシラン化合物との反応物において、アルコキシシラン化合物としては、ジオクチル錫オキサイドとアルコキシシラン化合物との反応物において上述したアルコキシシラン化合物と同様のものが挙げられる。 In the reaction product of dioctyltin dicarboxylate and alkoxysilane compound, examples of dioctyltin dicarboxylate include dioctyltin diacetate, dioctyltin dilaurate, and dioctyltin distearate. In the reaction product of dioctyltin dicarboxylate and alkoxysilane compound, the alkoxysilane compound may be the same as the alkoxysilane compound described above in the reaction product of dioctyltin oxide and alkoxysilane compound.
 ジオクチル錫ジカルボキシレートとアルコキシシラン化合物との反応物は、ジオクチル錫ジカルボキシレートにおけるカルボキシレート基と、アルコキシシラン化合物においてケイ素原子に結合しているアルコキシ基とが反応することによって形成される化合物である。ジオクチル錫ジカルボキシレートとアルコキシシラン化合物との反応物として、具体的には、ジオクチル錫オキシビスエトキシシリケート、ジオクチル錫オキシビスメトキシシリケート、ジオクチル錫ビス(トリエトキシシリケート)、ジオクチル錫ビス(トリメトキシシリケート)などが挙げられる。 A reaction product of dioctyltin dicarboxylate and an alkoxysilane compound is a compound formed by a reaction between a carboxylate group in dioctyltin dicarboxylate and an alkoxy group bonded to a silicon atom in the alkoxysilane compound. is there. As a reaction product of dioctyltin dicarboxylate and alkoxysilane compound, specifically, dioctyltin oxybisethoxysilicate, dioctyltin oxybismethoxysilicate, dioctyltin bis (triethoxysilicate), dioctyltin bis (trimethoxysilicate) ) And the like.
 なかでも、ジオクチル錫化合物としては、ジオクチル錫ジアセテート、ジオクチル錫オキサイドとアルコキシシラン化合物との反応物が好ましく、ジオクチル錫オキサイドとアルコキシシラン化合物との反応物がより好ましく、ジオクチル錫オキシビスエトキシシリケート、及びジオクチル錫ビス(トリエトキシシリケート)が特に好ましい。 Among these, as the dioctyltin compound, a dioctyltin diacetate, a reaction product of dioctyltin oxide and an alkoxysilane compound is preferable, a reaction product of dioctyltin oxide and an alkoxysilane compound is more preferable, dioctyltin oxybisethoxysilicate, And dioctyltin bis (triethoxysilicate) are particularly preferred.
 硬化性組成物中におけるジオクチル錫化合物の含有量は、ポリオキシアルキレン系重合体(A)100重量部に対して、1~10重量部が好ましく、1~5重量部がより好ましい。硬化性組成物中におけるジオクチル錫化合物の含有量を上記範囲内とすることによって、硬化性組成物の優れた貯蔵安定性や取り扱い性を維持しつつ、硬化性組成物の硬化速度を向上させることができる。 The content of the dioctyltin compound in the curable composition is preferably 1 to 10 parts by weight and more preferably 1 to 5 parts by weight with respect to 100 parts by weight of the polyoxyalkylene polymer (A). By setting the content of the dioctyltin compound in the curable composition within the above range, the curing rate of the curable composition is improved while maintaining excellent storage stability and handleability of the curable composition. Can do.
 [アミノシランカップリング剤]
 本発明の硬化性組成物は、アミノシランカップリング剤をさらに含有していることが好ましい。アミノシランカップリング剤とは、一分子中にアルコキシ基が結合した珪素原子と、窒素原子を含有する官能基とを有している化合物を意味する。アミノシランカップリング剤を上述した(メタ)アクリレート系重合体(B)と組合せて用いると、これらの相乗効果により、ポリオキシアルキレン系重合体(A)による硬化性組成物の硬化速度の向上を阻害することなく、硬化性組成物の接着性をより向上させることができる。
[Aminosilane coupling agent]
The curable composition of the present invention preferably further contains an aminosilane coupling agent. The aminosilane coupling agent means a compound having a silicon atom having an alkoxy group bonded in one molecule and a functional group containing a nitrogen atom. When an aminosilane coupling agent is used in combination with the above-mentioned (meth) acrylate polymer (B), the synergistic effect of these effects prevents the polyoxyalkylene polymer (A) from improving the curing rate of the curable composition. The adhesiveness of the curable composition can be further improved without doing so.
 アミノシランカップリング剤として、具体的には、3-アミノプロピルトリメトキシシラン、3-アミノプロピルメチルジメトキシシラン、3-アミノプロピルトリエトキシシラン、N-2-(アミノエチル)-3-アミノプロピルトリメトキシシラン、N-2-(アミノエチル)-3-アミノプロピルトリエトキシシラン、N,N’-ビス-〔3-(トリメトキシシリル)プロピル〕エチレンジアミン、N,N’-ビス-〔3-(トリエトキシシリル)プロピル〕エチレンジアミン、N,N’-ビス-〔3-(メチルジメトキシシリル)プロピル〕エチレンジアミン、N,N’-ビス-〔3-(トリメトキシシリル)プロピル〕ヘキサメチレンジアミン、N,N’-ビス-〔3-(トリエトキシシリル)プロピル〕ヘキサメチレンジアミン等が挙げられる。これらのアミノシランカップリング剤は、単独で用いられても二種以上が併用されてもよい。 Specific examples of aminosilane coupling agents include 3-aminopropyltrimethoxysilane, 3-aminopropylmethyldimethoxysilane, 3-aminopropyltriethoxysilane, and N-2- (aminoethyl) -3-aminopropyltrimethoxy. Silane, N-2- (aminoethyl) -3-aminopropyltriethoxysilane, N, N′-bis- [3- (trimethoxysilyl) propyl] ethylenediamine, N, N′-bis- [3- (tri Ethoxysilyl) propyl] ethylenediamine, N, N′-bis- [3- (methyldimethoxysilyl) propyl] ethylenediamine, N, N′-bis- [3- (trimethoxysilyl) propyl] hexamethylenediamine, N, N '-Bis- [3- (triethoxysilyl) propyl] hexamethylenediamine Etc. The. These aminosilane coupling agents may be used alone or in combination of two or more.
 なかでも、アミノシランカップリング剤としては、3-アミノプロピルトリメトキシシラン、N-2-(アミノエチル)-3-アミノプロピルトリメトキシシラン、及びN-2-(アミノエチル)-3-アミノプロピルトリエトキシシランが好ましく挙げられ、N-2-(アミノエチル)-3-アミノプロピルトリメトキシシランがより好ましく挙げられる。これらのアミノシランカップリング剤によれば、(メタ)アクリレート系重合体(B)との相乗効果が得られ易く、硬化性組成物の接着性をより向上させることができる。 Among these, aminosilane coupling agents include 3-aminopropyltrimethoxysilane, N-2- (aminoethyl) -3-aminopropyltrimethoxysilane, and N-2- (aminoethyl) -3-aminopropyltrimethyl. Ethoxysilane is preferred, and N-2- (aminoethyl) -3-aminopropyltrimethoxysilane is more preferred. According to these aminosilane coupling agents, a synergistic effect with the (meth) acrylate polymer (B) can be easily obtained, and the adhesiveness of the curable composition can be further improved.
 硬化性組成物中におけるアミノシランカップリング剤の含有量は、ポリオキシアルキレン系重合体(A)100重量部に対して、0.5~10重量部が好ましく、1~5重量部がより好ましい。硬化性組成物中におけるアミノシランカップリング剤の含有量を上記範囲内とすることによって、硬化性組成物の優れた貯蔵安定性や取り扱い性を維持しつつ、硬化性組成物の接着性を向上させることができる。 The content of the aminosilane coupling agent in the curable composition is preferably 0.5 to 10 parts by weight and more preferably 1 to 5 parts by weight with respect to 100 parts by weight of the polyoxyalkylene polymer (A). By keeping the content of the aminosilane coupling agent in the curable composition within the above range, the adhesive property of the curable composition is improved while maintaining the excellent storage stability and handleability of the curable composition. be able to.
 [脱水剤]
 本発明の硬化性組成物は、脱水剤をさらに含んでいることが好ましい。脱水剤によれば、硬化性組成物を保存している際に、空気中などに含まれている水分によって硬化性組成物が硬化することを抑制することができる。
[Dehydrating agent]
The curable composition of the present invention preferably further contains a dehydrating agent. According to the dehydrating agent, when the curable composition is stored, the curable composition can be prevented from being cured by moisture contained in the air.
 脱水剤としては、ビニルトリメトキシシラン、ジメチルジメトキシシラン、テトラエトキシシラン、メチルトリメトキシシラン、メチルトリエトキシシラン、テトラメトキシシラン、フェニルトリメトキシシラン、及びジフェニルジメトキシシランなどのシラン化合物;並びにオルトギ酸メチル、オルトギ酸エチル、オルト酢酸メチル、及びオルト酢酸エチル等のエステル化合物などを挙げることができる。これらの脱水剤は、単独で用いられても二種以上が併用されてもよい。なかでも、ビニルトリメトキシシランが好ましい。 Examples of dehydrating agents include silane compounds such as vinyltrimethoxysilane, dimethyldimethoxysilane, tetraethoxysilane, methyltrimethoxysilane, methyltriethoxysilane, tetramethoxysilane, phenyltrimethoxysilane, and diphenyldimethoxysilane; and methyl orthoformate And ester compounds such as ethyl orthoformate, methyl orthoacetate, and ethyl orthoacetate. These dehydrating agents may be used alone or in combination of two or more. Of these, vinyltrimethoxysilane is preferable.
 硬化性組成物中における脱水剤の含有量は、ポリオキシアルキレン系重合体(A)100重量部に対して、0.5~20重量部が好ましく、5~20重量部がより好ましく、7~12重量部が特に好ましい。硬化性組成物中における脱水剤の含有量を上記範囲内とすることによって、適度な脱水を行うことができ、これにより硬化性組成物の優れた硬化性や接着性を確保することができる。 The content of the dehydrating agent in the curable composition is preferably 0.5 to 20 parts by weight, more preferably 5 to 20 parts by weight, with respect to 100 parts by weight of the polyoxyalkylene polymer (A). 12 parts by weight is particularly preferred. By setting the content of the dehydrating agent in the curable composition within the above range, appropriate dehydration can be performed, and thereby excellent curability and adhesiveness of the curable composition can be ensured.
 [充填剤]
 本発明の硬化性組成物は、充填剤をさらに含んでいることが好ましい。充填剤によれば、機械的強度に優れている硬化物を得ることが可能な硬化性組成物を提供することができる。
[filler]
The curable composition of the present invention preferably further contains a filler. According to the filler, a curable composition capable of obtaining a cured product having excellent mechanical strength can be provided.
 充填剤としては、炭酸カルシウム、炭酸マグネシウム、酸化カルシウム、含水ケイ酸、無水ケイ酸、微粉末シリカ、ケイ酸カルシウム、二酸化チタン、クレー、タルク、カーボンブラック、及びガラスバルーンなどを挙げることができる。これらの充填剤は、単独で用いられても二種以上が併用されてもよい。なかでも、炭酸カルシウムが好ましく用いられる。 Examples of the filler include calcium carbonate, magnesium carbonate, calcium oxide, hydrous silicic acid, anhydrous silicic acid, finely divided silica, calcium silicate, titanium dioxide, clay, talc, carbon black, and glass balloon. These fillers may be used alone or in combination of two or more. Of these, calcium carbonate is preferably used.
 炭酸カルシウムの平均粒子径は、0.01~5μmが好ましく、0.05~2.5μmがより好ましい。このような平均粒子径を有している炭酸カルシムによれば、機械的強度及び伸び性に優れている硬化物を得ることができ、且つ優れた接着性を有している硬化性組成物を提供することができる。 The average particle size of calcium carbonate is preferably 0.01 to 5 μm, more preferably 0.05 to 2.5 μm. According to the calcium carbonate having such an average particle size, a cured product having excellent mechanical strength and extensibility can be obtained, and a curable composition having excellent adhesiveness can be obtained. Can be provided.
 また、炭酸カルシウムは、脂肪酸や脂肪酸エステルなどにより表面処理されていることが好ましい。脂肪酸や脂肪酸エステルなどにより表面処理されている炭酸カルシウムによれば、硬化性組成物にチキソトロピー性を付与できると共に炭酸カルシムが凝集することを抑制することができる。 Calcium carbonate is preferably surface-treated with a fatty acid or a fatty acid ester. According to the calcium carbonate surface-treated with a fatty acid, a fatty acid ester, or the like, thixotropic properties can be imparted to the curable composition and aggregation of calcium carbonate can be suppressed.
 硬化性組成物中における充填剤の含有量は、ポリオキシアルキレン系重合体(A)100重量部に対して、1~700重量部が好ましく、10~200重量部がより好ましい。硬化性組成物中における充填剤の含有量を上記範囲内とすることによって、硬化性組成物が機械的強度及び伸び性に優れている硬化物を形成することができる。このような硬化物は、接着力に優れる。 The content of the filler in the curable composition is preferably 1 to 700 parts by weight and more preferably 10 to 200 parts by weight with respect to 100 parts by weight of the polyoxyalkylene polymer (A). By setting the content of the filler in the curable composition within the above range, a cured product in which the curable composition is excellent in mechanical strength and extensibility can be formed. Such a cured product is excellent in adhesive strength.
 [耐候安定剤]
 本発明の硬化性組成物は、耐候安定剤をさらに含んでいることが好ましい。耐候安定剤としては、酸化防止剤、紫外線吸収剤、及び光安定剤が好ましく挙げられる。耐候安定剤は、一種単独で用いられてもよく、二種以上を併用してもよい。
[Weatherproof stabilizer]
The curable composition of the present invention preferably further contains a weathering stabilizer. Preferred examples of the weathering stabilizer include an antioxidant, an ultraviolet absorber, and a light stabilizer. A weathering stabilizer may be used individually by 1 type, and may use 2 or more types together.
 酸化防止剤としては、ヒンダードフェノール系酸化防止剤、モノフェノール系酸化防止剤、ビスフェノール系酸化防止剤、及びポリフェノール系酸化防止剤などが挙げられる。なかでも、ヒンダードフェノール系酸化防止剤が好ましい。ヒンダードフェノール系酸化防止剤として、具体的には、ペンタエリスリトールテトラキス[3-(3,5-ジ-tert-ブチル-4-ヒドロキシフェニル)プロピオネート](融点118℃)、オクタデシル-3-(3,5-ジ-tert-ブチル-4-ヒドロキシフェニル)プロピオネート](融点52℃)、及びN,N′-ヘキサン-1,6-ジイルビス[3-(3,5-ジ-tert-ブチル-4-ヒドロキシフェニルプロピオンアミド)](融点158℃)、及び3-(4-ヒドロキシ-3,5-ジイソプロピルフェニル)プロピオン酸オクチル(融点5℃)などが挙げられる。また、ヒンダードフェノール系酸化防止剤としては、BASF社製 IRGANOX(登録商標)1135(融点5℃)などの市販品を用いることもできる。 Examples of the antioxidant include hindered phenolic antioxidants, monophenolic antioxidants, bisphenolic antioxidants, and polyphenolic antioxidants. Of these, hindered phenol antioxidants are preferred. Specific examples of hindered phenol antioxidants include pentaerythritol tetrakis [3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate] (melting point: 118 ° C.), octadecyl-3- (3 , 5-di-tert-butyl-4-hydroxyphenyl) propionate] (melting point 52 ° C.), and N, N′-hexane-1,6-diylbis [3- (3,5-di-tert-butyl-4 -Hydroxyphenylpropionamide)] (melting point: 158 ° C.), and octyl 3- (4-hydroxy-3,5-diisopropylphenyl) propionate (melting point: 5 ° C.). Moreover, as a hindered phenolic antioxidant, commercial items, such as IRGANOX (trademark) 1135 (melting | fusing point 5 degreeC) by BASF, can also be used.
 硬化性組成物中における酸化防止剤の含有量は、ポリオキシアルキレン系重合体(A)100重量部に対して、0.1~20重量部が好ましく、0.3~10重量部がより好ましい。 The content of the antioxidant in the curable composition is preferably 0.1 to 20 parts by weight, more preferably 0.3 to 10 parts by weight with respect to 100 parts by weight of the polyoxyalkylene polymer (A). .
 紫外線吸収剤としては、ベンゾトリアゾール系紫外線吸収剤、ベンゾフェノン系紫外線吸収剤などが挙げられる。なかでも、ベンゾトリアゾール系紫外線吸収剤が好ましい。ベンゾトリアゾール系紫外線吸収剤として、具体的には、2-(2H-ベンゾトリアゾール-2-イル)-p-クレゾール(融点130℃)、2-(2H-ベンゾトリアゾール-2-イル)-4-6-ビス(1-メチル-1-フェニルエチル)フェノール(融点139℃)、2-[5-クロロ(2H)-ベンゾトリアゾール-2-イル]-4-メチル-6-(tert-ブチル)フェノール(融点139℃)、2-(2H-ベンゾトリアゾール-2-イル)-4,6-ジ-tert-ペンチルフェノール(融点84℃)、及び2-(2H-ベンゾトリアゾール-2-イル)-4-(1,1,3,3-テトラメチルブチル)フェノール(融点104℃)などが挙げられる。また、ベンゾトリアゾール系紫外線吸収剤としては、BASF社製 TINUVIN(登録商標)384-2(融点10℃以下)などの市販品を用いることもできる。 Examples of UV absorbers include benzotriazole UV absorbers and benzophenone UV absorbers. Of these, benzotriazole-based ultraviolet absorbers are preferred. Specific examples of the benzotriazole ultraviolet absorber include 2- (2H-benzotriazol-2-yl) -p-cresol (melting point 130 ° C.), 2- (2H-benzotriazol-2-yl) -4- 6-bis (1-methyl-1-phenylethyl) phenol (melting point 139 ° C.), 2- [5-chloro (2H) -benzotriazol-2-yl] -4-methyl-6- (tert-butyl) phenol (Melting point 139 ° C.), 2- (2H-benzotriazol-2-yl) -4,6-di-tert-pentylphenol (melting point 84 ° C.), and 2- (2H-benzotriazol-2-yl) -4 -(1,1,3,3-tetramethylbutyl) phenol (melting point 104 ° C.) and the like. As the benzotriazole-based ultraviolet absorber, commercially available products such as TINUVIN (registered trademark) 384-2 (melting point: 10 ° C. or lower) manufactured by BASF Corporation may be used.
 硬化性組成物中における紫外線吸収剤の含有量は、ポリオキシアルキレン系重合体(A)100重量部に対して、0.1~20重量部が好ましく、0.1~10重量部がより好ましい。 The content of the ultraviolet absorber in the curable composition is preferably 0.1 to 20 parts by weight, and more preferably 0.1 to 10 parts by weight with respect to 100 parts by weight of the polyoxyalkylene polymer (A). .
 光安定剤としては、ヒンダードアミン系光安定剤などが挙げられる。具体的には、ビス(1,2,2,6,6-ペンタメチル-4-ピペリジル)セバケート及びメチル1,2,2,6,6-ペンタメチル-4-ピペリジルセバケートの混合物(融点10℃以下)、ジブチルアミン・1,3,5-トリアジン・N,N’-ビス(2,2,6,6-テトラメチル-4-ピペリジル-1,6-ヘキサメチレンジアミンとN-(2,2,6,6-テトラメチル-4-ピペリジル)ブチルアミンとの重縮合物(融点135℃)、ポリ[{6-(1,1,3,3-テトラメチルブチル)アミノ-1,3,5-トリアジン-2,4-ジイル}{(2,2,6,6-テトラメチル-4-ピペリジル)イミノ}ヘキサメチレン{(2,2,6,6-テトラメチル-4-ピペリジル)イミノ}](融点118℃)、コハク酸ジメチルと4-ヒドロキシ-2,2,6,6-テトラメチル-1-ピペリジンエタノールとの重縮合物(融点63℃)などが挙げられる。 Examples of light stabilizers include hindered amine light stabilizers. Specifically, a mixture of bis (1,2,2,6,6-pentamethyl-4-piperidyl) sebacate and methyl 1,2,2,6,6-pentamethyl-4-piperidyl sebacate (melting point: 10 ° C. or less ), Dibutylamine, 1,3,5-triazine, N, N′-bis (2,2,6,6-tetramethyl-4-piperidyl-1,6-hexamethylenediamine and N- (2,2, Polycondensate with 6,6-tetramethyl-4-piperidyl) butylamine (melting point 135 ° C.), poly [{6- (1,1,3,3-tetramethylbutyl) amino-1,3,5-triazine -2,4-diyl} {(2,2,6,6-tetramethyl-4-piperidyl) imino} hexamethylene {(2,2,6,6-tetramethyl-4-piperidyl) imino}] (melting point 118 ° C), dimethyl succinate Including the 4-hydroxy-2,2,6,6-tetramethyl-1-piperidineethanol polycondensate (mp 63 ° C.) and the like.
 硬化性組成物中における光安定剤の含有量は、ポリオキシアルキレン系重合体(A)100重量部に対して、0.1~20重量部が好ましく、0.1~10重量部がより好ましい。 The content of the light stabilizer in the curable composition is preferably 0.1 to 20 parts by weight, more preferably 0.1 to 10 parts by weight with respect to 100 parts by weight of the polyoxyalkylene polymer (A). .
 耐候安定剤の融点は、10℃以下が好ましく、-20~10℃がより好ましく、-20~5℃が特に好ましい。融点が10℃以下である耐候安定剤によれば、硬化性組成物に優れた接着性を付与することができる。 The melting point of the weather resistance stabilizer is preferably 10 ° C. or less, more preferably −20 to 10 ° C., and particularly preferably −20 to 5 ° C. According to the weather stabilizer having a melting point of 10 ° C. or lower, excellent adhesiveness can be imparted to the curable composition.
 なお、複数種の耐候安定剤を用いる場合、耐候安定剤の融点とはそれぞれの耐候安定剤の融点を意味する。本発明において、耐候安定剤の融点は、JIS K0064(1922年)に準拠した目視法により測定された値とする。 In addition, when using several types of weather stabilizers, the melting point of the weather stabilizer means the melting point of each weather stabilizer. In the present invention, the melting point of the weather stabilizer is a value measured by a visual method according to JIS K0064 (1922).
 本発明の硬化性組成物は、上述した成分の他にも、チキソ性付与剤、顔料、染料、及び沈降防止剤などの他の添加剤、並びに溶剤などを含んでいてもよい。他の添加剤や溶媒は、一種単独で用いられてもよく、二種以上を併用してもよい。 The curable composition of the present invention may contain other additives such as a thixotropic agent, a pigment, a dye, and an anti-settling agent, a solvent, and the like in addition to the components described above. Another additive and solvent may be used individually by 1 type, and may use 2 or more types together.
 チキソ性付与剤は、硬化性組成物にチキソトロピー性を発現せることができるものであればよい。チキソ性付与剤としては、水添ひまし油、脂肪酸ビスアマイド、ヒュームドシリカなどが好ましく挙げられる。 The thixotropic agent may be any one that can express thixotropic properties in the curable composition. Preferred examples of the thixotropic agent include hydrogenated castor oil, fatty acid bisamide, and fumed silica.
 硬化性組成物中におけるチキソ性付与剤の含有量は、ポリオキシアルキレン系重合体(A)100重量部に対して、0.1~200重量部が好ましく、1~150重量部がより好ましい。 The content of the thixotropic agent in the curable composition is preferably 0.1 to 200 parts by weight and more preferably 1 to 150 parts by weight with respect to 100 parts by weight of the polyoxyalkylene polymer (A).
 本発明の硬化性組成物の製造は、トリメトキシシリル基を含有するポリオキシアルキレン系重合体(A)、加水分解性シリル基を含有する(メタ)アクリレート系重合体(B)、ジオクチル錫化合物、並びに必要に応じて他の添加剤及び溶剤をそれぞれ所定の重量比となるように混合する方法により行うことができる。混合は減圧下で行うことが好ましい。 Production of the curable composition of the present invention includes a polyoxyalkylene polymer (A) containing a trimethoxysilyl group, a (meth) acrylate polymer (B) containing a hydrolyzable silyl group, and a dioctyltin compound. In addition, if necessary, other additives and solvents can be mixed by a predetermined weight ratio. Mixing is preferably performed under reduced pressure.
 本発明の硬化性組成物は、空気中の湿気や、被着体に含まれている湿気によって迅速に硬化し、各種基材に対して優れた接着力を有している硬化物を形成することができる。このような基材としては、特に制限されず、フッ素系樹脂、塩化ビニル樹脂、塩化ビニリデン樹脂、ポリエチレン樹脂、ポリプロピレン樹脂、ポリスチレン樹脂、ABS樹脂、ポリアミド樹脂、ポリエステル樹脂、ポリウレタン樹脂、ポリビニルアルコール樹脂、エチレン-酢酸ビニル共重合樹脂、塩素化ポリプロピレン樹脂、及びメラミン樹脂等の合成樹脂を含む合成樹脂板;天然木材、合板、ミディアムデンシティファイバーボード(MDF)パーティクルボード、硬質ファイバーボード、半硬質ファイバーボード、及び集成材等の木材;無機ボード;並びにアルミニウム、鉄、ステンレス、及び鋼板等の金属を含む金属板などが挙げられる。 The curable composition of the present invention is rapidly cured by moisture in the air or moisture contained in the adherend, and forms a cured product having excellent adhesion to various substrates. be able to. Such a substrate is not particularly limited, and is a fluorine resin, vinyl chloride resin, vinylidene chloride resin, polyethylene resin, polypropylene resin, polystyrene resin, ABS resin, polyamide resin, polyester resin, polyurethane resin, polyvinyl alcohol resin, Synthetic resin board containing synthetic resin such as ethylene-vinyl acetate copolymer resin, chlorinated polypropylene resin, and melamine resin; natural wood, plywood, medium density fiber board (MDF) particle board, rigid fiber board, semi-rigid fiber board, And wood such as laminated wood; inorganic boards; and metal plates containing metals such as aluminum, iron, stainless steel, and steel sheets.
 また、基材としては、金属板の表面の少なくとも一部が、合成樹脂によって塗装されてなる合成樹脂塗装金属板も挙げられる。合成樹脂塗装金属板に用いられる合成樹脂としては、ポリ塩化ビニル系樹脂、ポリオレフィン系樹脂、ポリエステル系樹脂、及びフッ素系樹脂などが挙げられる。合成樹脂塗装金属板に用いられる金属板としては、アルミニウム、鉄、ステンレス、及び鋼板等の金属からなる金属板が挙げられる。 Also, examples of the base material include a synthetic resin-coated metal plate in which at least a part of the surface of the metal plate is coated with a synthetic resin. Examples of the synthetic resin used for the synthetic resin-coated metal plate include polyvinyl chloride resin, polyolefin resin, polyester resin, and fluorine resin. Examples of the metal plate used for the synthetic resin-coated metal plate include metal plates made of metals such as aluminum, iron, stainless steel, and steel plates.
 なかでも、本発明の硬化性組成物は、合成樹脂板や合成樹脂塗装金属板などの基材に好適に用いられる。これらの基材に対して従来の硬化性組成物は接着性が低く、本発明による効果を特に発揮することができる。 Especially, the curable composition of this invention is used suitably for base materials, such as a synthetic resin board and a synthetic resin coating metal plate. Conventional curable compositions have low adhesion to these substrates, and can particularly demonstrate the effects of the present invention.
 このように本発明の硬化性組成物は、優れた接着性を有していることから、土木用、建築用、車両用、電気製品用、電子部品用、雑貨用の接着剤、シーリング剤、コーティング剤、シーラント及び目止め剤や、土木用又は建築用基材の被覆剤及びプライマー剤などとして、様々な用途に用いることができる。 As described above, since the curable composition of the present invention has excellent adhesiveness, it is used for civil engineering, architectural, vehicle, electrical products, electronic parts, miscellaneous goods, sealing agents, It can be used for various applications as a coating agent, a sealant and a sealing agent, and a coating agent and primer agent for civil engineering or building base materials.
 本発明によれば、短時間で硬化することができると共に、接着性及び貯蔵安定性にも優れている硬化性組成物を提供することができる。 According to the present invention, it is possible to provide a curable composition that can be cured in a short time and is excellent in adhesion and storage stability.
 以下に実施例を挙げて本発明の態様を更に詳しく説明するが、本発明はこれらの実施例のみに限定されるものではない。 Hereinafter, the embodiments of the present invention will be described in more detail with reference to examples, but the present invention is not limited to these examples.
 (実施例1~9、比較例1~3)
 下記成分を、それぞれ表1に示した配合量となるようにして、密封した攪拌機中で減圧しながら均一になるまで混合することにより硬化性組成物を調製した。
 [ポリオキシアルキレン系重合体(A1)]
 主鎖骨格がポリオキシプロピレンであり、且つ主鎖骨格の両末端にウレタン結合を介してトリメトキシシリル基を有しているポリオキシアルキレン系重合体(A1)(25℃における粘度5,000mPa・s、バイエル社製 Desmoseal(登録商標)XP2749)
 [ポリオキシアルキレン系重合体(A2)]
 主鎖骨格がポリオキシプロピレンであり、主鎖骨格の両末端にトリメトキシシリル基を有し且つウレタン結合を有していないポリオキシアルキレン系重合体(A2)(数平均分子量25,000、25℃における粘度25,000mPa・s、株式会社カネカ製 サイリルSAX580)
 [(メタ)アクリレート系重合体(B1)]
 トリメトキシシリル基を有し、且つ主鎖骨格がエチルアクリレート及びn-ブチルアクリレートの共重合体である(メタ)アクリレート系重合体(B1)(東亞合成株式会社製 アルフォンUS-6170、重量平均分子量2,800)
 [(メタ)アクリレート系重合体(B2)]
 トリメトキシシリル基を有し、且つ主鎖骨格がn-ブチルアクリレート及びメチルメタクリレートの共重合体である(メタ)アクリレート系重合体(B2)(東亞合成株式会社製 ARUFON US-6110、重量平均分子量3,200)
 [(メタ)アクリレート系重合体(B3)]
 トリメトキシシリル基を有し、且つ主鎖骨格が2-エチルヘキシルアクリレート及びメチルメタクリレートの共重合体である(メタ)アクリレート系重合体(B3)(東亜合成株式会社製 ARUFON US-6100、重量平均分子量2,500)
 [シラノール縮合触媒]
 シラノール縮合触媒(1)(ジオクチル錫ジアセテート)
 シラノール縮合触媒(2)(ジオクチル錫ビス(トリエトキシシリケート)、日東化成株式会社 製品名「ネオスタン S-1」)
 シラノール縮合触媒(3)(ジブチル錫ジアセチルアセトナート)
 [アミノシランカップリング剤]
 アミノシランカップリング剤(1)(N-2-(アミノエチル)-3-アミノプロピルトリメトキシシラン、信越化学工業株式会社製 KBM-603)
 アミノシランカップリング剤(2)(3-アミノプロピルトリメトキシシラン、信越化学工業株式会社製 KBM-903)
 [脱水剤]
 脱水剤(ビニルトリメトキシシラン、信越化学工業株式会社製 KBM-1003)
 [充填剤]
 充填剤(脂肪酸により表面処理されてなるコロイダル炭酸カルシウム、丸尾カルシウム株式会社製 カルファイン200M、平均粒子径0.05μm)
 [耐候安定剤]
 ヒンダードフェノール系酸化防止剤(1)(ペンタエリスリトールテトラキス[3-(3,5-ジ-tert-ブチル-4-ヒドロキシフェニル)プロピオネート]、融点118℃、BASF社製 IRGANOX(登録商標)1010)
 ベンゾトリアゾール系紫外線吸収剤(1)(2-[5-クロロ(2H)-ベンゾトリアゾール-2-イル]-4-メチル-6-(tert-ブチル)フェノール、融点139℃、BASF社製 TINUVIN(登録商標)326)
 ヒンダードフェノール系酸化防止剤(2)(3-(4-ヒドロキシ-3,5-ジイソプロピルフェニル)プロピオン酸オクチル、融点5℃、BASF社製 IRGANOX(登録商標)1135)
 ベンゾトリアゾール系紫外線吸収剤(2)(融点10℃以下、BASF社製 TINUVIN(登録商標)384-2)
(Examples 1 to 9, Comparative Examples 1 to 3)
A curable composition was prepared by mixing the following components in a sealed stirrer until the mixture was uniform in a sealed stirrer so as to have the blending amounts shown in Table 1, respectively.
[Polyoxyalkylene polymer (A1)]
Polyoxyalkylene polymer (A1) having a main chain skeleton of polyoxypropylene and having trimethoxysilyl groups at both ends of the main chain skeleton via urethane bonds (viscosity at 25 ° C. of 5,000 mPa · s) s, Desmosal (registered trademark) XP2749, manufactured by Bayer AG)
[Polyoxyalkylene polymer (A2)]
A polyoxyalkylene polymer (A2) having a main chain skeleton of polyoxypropylene, having a trimethoxysilyl group at both ends of the main chain skeleton and having no urethane bond (number average molecular weight 25,000, 25 Viscosity at 25,000 mPa · s, Silyl SAX580 manufactured by Kaneka Corporation)
[(Meth) acrylate polymer (B1)]
(Meth) acrylate polymer (B1) having a trimethoxysilyl group and the main chain skeleton being a copolymer of ethyl acrylate and n-butyl acrylate (Alfone US-6170, manufactured by Toagosei Co., Ltd., weight average molecular weight) 2,800)
[(Meth) acrylate polymer (B2)]
(Meth) acrylate polymer (B2) having a trimethoxysilyl group and the main chain skeleton being a copolymer of n-butyl acrylate and methyl methacrylate (ARUFON US-6110, manufactured by Toagosei Co., Ltd., weight average molecular weight) 3,200)
[(Meth) acrylate polymer (B3)]
(Meth) acrylate polymer (B3) having a trimethoxysilyl group and the main chain skeleton being a copolymer of 2-ethylhexyl acrylate and methyl methacrylate (ARUFON US-6100 manufactured by Toagosei Co., Ltd., weight average molecular weight) 2,500)
[Silanol condensation catalyst]
Silanol condensation catalyst (1) (dioctyltin diacetate)
Silanol condensation catalyst (2) (dioctyltin bis (triethoxysilicate), Nitto Kasei Corporation product name “Neostan S-1”)
Silanol condensation catalyst (3) (dibutyltin diacetylacetonate)
[Aminosilane coupling agent]
Aminosilane coupling agent (1) (N-2- (aminoethyl) -3-aminopropyltrimethoxysilane, KBM-603, manufactured by Shin-Etsu Chemical Co., Ltd.)
Aminosilane coupling agent (2) (3-aminopropyltrimethoxysilane, KBM-903, manufactured by Shin-Etsu Chemical Co., Ltd.)
[Dehydrating agent]
Dehydrating agent (vinyltrimethoxysilane, KBM-1003 manufactured by Shin-Etsu Chemical Co., Ltd.)
[filler]
Filler (colloidal calcium carbonate surface-treated with fatty acid, Calfine 200M, manufactured by Maruo Calcium Co., Ltd., average particle size 0.05 μm)
[Weatherproof stabilizer]
Hindered phenol antioxidant (1) (pentaerythritol tetrakis [3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate], melting point 118 ° C., IRGANOX (registered trademark) 1010 manufactured by BASF)
Benzotriazole ultraviolet absorber (1) (2- [5-chloro (2H) -benzotriazol-2-yl] -4-methyl-6- (tert-butyl) phenol, melting point 139 ° C., TINUVIN (manufactured by BASF) Registered trademark) 326)
Hindered phenol antioxidant (2) (octyl 3- (4-hydroxy-3,5-diisopropylphenyl) propionate, melting point 5 ° C., IRGANOX (registered trademark) 1135 manufactured by BASF Corporation)
Benzotriazole ultraviolet absorber (2) (melting point: 10 ° C. or less, TINUVIN (registered trademark) 384-2 manufactured by BASF)
 (評価)
 硬化性組成物について、タックフリータイム、接着性、引張接着強さ、及び貯蔵安定性を下記手順に従って評価した。結果をまとめて表1に示す。
(Evaluation)
The curable composition was evaluated for tack free time, adhesion, tensile bond strength, and storage stability according to the following procedure. The results are summarized in Table 1.
 (タックフリータイム)
 JIS A5758に準拠して、温度23℃、相対湿度50%の環境下で、硬化性組成物のタックフリータイム(分)を測定した。
(Tack free time)
In accordance with JIS A5758, tack-free time (minutes) of the curable composition was measured in an environment of a temperature of 23 ° C. and a relative humidity of 50%.
 (接着性)
 被着体として、ラワン合板、ステンレス板、及びフッ素樹脂塗装鋼板を用意した。硬化性組成物を、各被着体上にビード状(幅5mm、厚さ4mm)に塗布し、温度23℃、相対湿度50%の雰囲気下に7日間放置させることにより硬化させて、硬化物を得た。そして、硬化物をその長さ方向における一方の端部から他方の端部に向かって指により100mm/分の引張速度で被着体から剥離し、この時の硬化物の破壊状態を目視により確認した。表1において、被着体から硬化物を剥離する際に、硬化物が全て凝集破壊したものを「優(excellent)」とし、硬化物が凝集破壊した部分と界面破壊した部分とがあったものを「良(good)」とし、硬化物が全て界面破壊したものを「不良(bad)」とした。
(Adhesiveness)
As the adherend, a lauan plywood, a stainless steel plate, and a fluororesin-coated steel plate were prepared. A curable composition is applied on each adherend in a bead shape (width 5 mm, thickness 4 mm) and cured by leaving it to stand in an atmosphere of a temperature of 23 ° C. and a relative humidity of 50% for 7 days. Got. Then, the cured product is peeled from the adherend at a tensile speed of 100 mm / min from one end to the other end in the length direction with a finger, and the destruction state of the cured product at this time is visually confirmed. did. In Table 1, when exfoliating the cured product from the adherend, all the cured product was agglomerated and destroyed, indicating "excellent", and the cured product had a part where the agglomerated fracture and a part where the interface was destroyed Was evaluated as “good”, and all the cured products that had undergone interfacial failure were evaluated as “bad”.
 なお、硬化物の凝集破壊とは、被着体から硬化物を剥離する際に、硬化物が破壊した状態を意味する。また、硬化物の界面破壊とは、被着体から硬化物を剥離する際に、被着体と硬化物との界面で剥離した状態を意味する。硬化性組成物の硬化物の接着力が高いほど凝集破壊を生じ、硬化性組成物の硬化物の接着力が低いほど界面破壊を生じる。 The cohesive failure of the cured product means a state in which the cured product is destroyed when the cured product is peeled from the adherend. Moreover, the interface destruction of hardened | cured material means the state which peeled in the interface of a to-be-adhered body and hardened | cured material when peeling hardened | cured material from a to-be-adhered body. The higher the adhesive strength of the cured product of the curable composition, the more the cohesive failure occurs, and the lower the adhesive strength of the cured product of the curable composition, the more the interface failure occurs.
 (引張接着強さ)
 JIS A5547 5.2に準拠して、硬化性組成物を用いて試験体を作製し、この試験体について引張接着強さT[N/mm2]を測定した。具体的な測定手順は、次に示す通りである。下地試料としてモルタル板(厚み15mm、縦70mm×横70mm)、及び仕上試料としてポリスチレンフォーム保温板(厚み5mm、縦40mm×横40mm)を用意した。仕上試料の下面全面に硬化性組成物を、塗布厚みが1mmとなるようにして塗布した。仕上試料を下地試料の上に載せた後、これらを温度23℃、相対湿度50%の環境下に14日間放置して、硬化性組成物を硬化させた。これにより、下地試料と仕上試料とが硬化性組成物の硬化物によって貼り合わされた試験体を得た。試験体について引張接着強さ試験を行い、接着面が破断するまでの最大荷重P[N]を測定した。そして、最大荷重P[N]を硬化性組成物の塗布面積W(1600[mm2])で除することにより、引張接着強さT[N/mm2]を算出した。
(Tensile bond strength)
Based on JIS A5547 5.2, the test body was produced using the curable composition, and tensile adhesive strength T [N / mm < 2 >] was measured about this test body. A specific measurement procedure is as follows. A mortar plate (thickness 15 mm, length 70 mm × width 70 mm) was prepared as a base sample, and a polystyrene foam heat insulating plate (thickness 5 mm, length 40 mm × width 40 mm) was prepared as a finished sample. The curable composition was applied to the entire lower surface of the finished sample so that the coating thickness was 1 mm. After the finished samples were placed on the base sample, they were left in an environment of a temperature of 23 ° C. and a relative humidity of 50% for 14 days to cure the curable composition. Thereby, the test body by which the ground sample and the finishing sample were bonded together by the hardened | cured material of the curable composition was obtained. The test specimen was subjected to a tensile bond strength test, and the maximum load P [N] until the bonded surface was broken was measured. Then, the tensile adhesive strength T [N / mm 2 ] was calculated by dividing the maximum load P [N] by the application area W (1600 [mm 2 ]) of the curable composition.
 (貯蔵安定性)
 硬化性組成物を、容器中に充填した後に密閉し、温度23℃の雰囲気下に1日放置した。放置後の硬化性組成物の23℃における粘度T1[mPa・s]を、粘度計(ブルックフィールド社製 B8U型粘度計、ローター:No.7、回転数10rpm)を用いて測定した。
(Storage stability)
The curable composition was filled in a container, sealed, and left in an atmosphere at a temperature of 23 ° C. for 1 day. The viscosity T 1 [mPa · s] at 23 ° C. of the curable composition after standing was measured using a viscometer (Brookfield B8U viscometer, rotor: No. 7, rotation speed: 10 rpm).
 また、硬化性組成物を、容器中に充填した後に密閉し、温度50℃の雰囲気下に28日放置した。放置後の硬化性組成物の23℃における粘度T2[mPa・s]を、上記と同様にして測定した。 Further, the curable composition was filled in a container and sealed, and left in an atmosphere at a temperature of 50 ° C. for 28 days. The viscosity T 2 [mPa · s] at 23 ° C. of the curable composition after standing was measured in the same manner as described above.
Figure JPOXMLDOC01-appb-T000001
Figure JPOXMLDOC01-appb-T000001
 本発明の硬化性組成物は、短時間で硬化することができると共に、接着性及び貯蔵安定性にも優れている。したがって、このような硬化性組成物は、様々な被着体を接着するために好適に用いられる。 The curable composition of the present invention can be cured in a short time and is excellent in adhesiveness and storage stability. Therefore, such a curable composition is suitably used for bonding various adherends.

Claims (6)

  1.  トリメトキシシリル基を有するポリオキシアルキレン系重合体(A)100重量部、
     加水分解性シリル基を有し、且つ主鎖骨格にエチル(メタ)アクリレート及びn-ブチル(メタ)アクリレートの共重合体、又はメチル(メタ)アクリレート及びn-ブチル(メタ)アクリレートの共重合体を含む(メタ)アクリレート系重合体(B)10~100重量部、及び
     ジオクチル錫化合物を含有することを特徴とする硬化性組成物。
    100 parts by weight of a polyoxyalkylene polymer (A) having a trimethoxysilyl group,
    Copolymer of ethyl (meth) acrylate and n-butyl (meth) acrylate or copolymer of methyl (meth) acrylate and n-butyl (meth) acrylate having a hydrolyzable silyl group and a main chain skeleton A curable composition comprising 10 to 100 parts by weight of a (meth) acrylate polymer (B) containing a dioctyl tin compound.
  2.  ポリオキシアルキレン系重合体(A)が、ウレタン結合を有していることを特徴とする請求項1に記載の硬化性組成物。 The curable composition according to claim 1, wherein the polyoxyalkylene polymer (A) has a urethane bond.
  3.  (メタ)アクリレート系重合体(B)の主鎖骨格が、エチル(メタ)アクリレート及びn-ブチル(メタ)アクリレートの共重合体であることを特徴とする請求項1に記載の硬化性組成物。 2. The curable composition according to claim 1, wherein the main chain skeleton of the (meth) acrylate polymer (B) is a copolymer of ethyl (meth) acrylate and n-butyl (meth) acrylate. .
  4.  ジオクチル錫化合物が、ジオクチル錫オキサイドとアルコキシシラン化合物との反応物を含むことを特徴とする請求項1に記載の硬化性組成物。 The curable composition according to claim 1, wherein the dioctyltin compound contains a reaction product of dioctyltin oxide and an alkoxysilane compound.
  5.  ジオクチル錫化合物を、ポリオキシアルキレン系重合体(A)100重量部に対して、1~10重量部含有することを特徴とする請求項1に記載の硬化性組成物。 The curable composition according to claim 1, wherein the dioctyltin compound is contained in an amount of 1 to 10 parts by weight based on 100 parts by weight of the polyoxyalkylene polymer (A).
  6.  アミノシランカップリング剤を含有することを特徴とする請求項1に記載の硬化性組成物。 The curable composition according to claim 1, further comprising an aminosilane coupling agent.
PCT/JP2014/058359 2013-03-25 2014-03-25 Curable composition WO2014157247A1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7022800B1 (en) 2020-09-02 2022-02-18 サンスター技研株式会社 Adhesive composition and adhesive structure
JP7452262B2 (en) 2019-07-19 2024-03-19 日本ゼオン株式会社 Acrylic rubber veil with excellent storage stability

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014212668A1 (en) 2014-05-26 2015-11-26 Sms Group Gmbh Device for winding a strip material into a coil
CN106566301A (en) * 2016-11-13 2017-04-19 惠州市大亚湾科翔科技电路板有限公司 Cured type composition for flexible circuit board
CN111902485A (en) * 2018-03-28 2020-11-06 株式会社钟化 Method for producing heat-curable cured product, and heat-curable composition

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006037076A (en) * 2004-06-22 2006-02-09 Asahi Glass Co Ltd Curable composition
JP2008037937A (en) * 2006-08-02 2008-02-21 Kaneka Corp Curable composition
JP2011153192A (en) * 2010-01-26 2011-08-11 Toagosei Co Ltd Curable composition
JP2012107103A (en) * 2010-11-16 2012-06-07 Soken Chem & Eng Co Ltd Curable composition
JP2012229398A (en) * 2011-04-13 2012-11-22 Kaneka Corp Reactive plasticizer and curable composition containing the same
JP2014025001A (en) * 2012-07-27 2014-02-06 Cemedine Co Ltd Curable composition, tackifier/adhesive composition consisting of the curable composition, and floor structures formed by interposing these compositions
JP2014101499A (en) * 2012-10-22 2014-06-05 Sekisui Fuller Co Ltd Curable composition

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006051798A1 (en) * 2004-11-10 2006-05-18 Kaneka Corporation Curable composition
WO2010008079A1 (en) * 2008-07-18 2010-01-21 コニシ株式会社 Curable resin composition
CN102712814B (en) * 2010-01-19 2015-08-26 株式会社钟化 Solidification compound

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006037076A (en) * 2004-06-22 2006-02-09 Asahi Glass Co Ltd Curable composition
JP2008037937A (en) * 2006-08-02 2008-02-21 Kaneka Corp Curable composition
JP2011153192A (en) * 2010-01-26 2011-08-11 Toagosei Co Ltd Curable composition
JP2012107103A (en) * 2010-11-16 2012-06-07 Soken Chem & Eng Co Ltd Curable composition
JP2012229398A (en) * 2011-04-13 2012-11-22 Kaneka Corp Reactive plasticizer and curable composition containing the same
JP2014025001A (en) * 2012-07-27 2014-02-06 Cemedine Co Ltd Curable composition, tackifier/adhesive composition consisting of the curable composition, and floor structures formed by interposing these compositions
JP2014101499A (en) * 2012-10-22 2014-06-05 Sekisui Fuller Co Ltd Curable composition

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7452262B2 (en) 2019-07-19 2024-03-19 日本ゼオン株式会社 Acrylic rubber veil with excellent storage stability
JP7022800B1 (en) 2020-09-02 2022-02-18 サンスター技研株式会社 Adhesive composition and adhesive structure
WO2022049931A1 (en) * 2020-09-02 2022-03-10 サンスター技研株式会社 Adhesive composition and bonded structure
JP2022042337A (en) * 2020-09-02 2022-03-14 サンスター技研株式会社 Adhesive composition and bonded structure
CN114867808A (en) * 2020-09-02 2022-08-05 盛势达技研株式会社 Adhesive composition and adhesive structure
CN114867808B (en) * 2020-09-02 2023-10-24 盛势达技研株式会社 Adhesive composition and adhesive structure
EP4098713A4 (en) * 2020-09-02 2024-03-20 Sunstar Engineering Inc. Adhesive composition and bonded structure

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