WO2018047470A1 - プライマー組成物及びカーテンウォールユニット - Google Patents
プライマー組成物及びカーテンウォールユニット Download PDFInfo
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- WO2018047470A1 WO2018047470A1 PCT/JP2017/025888 JP2017025888W WO2018047470A1 WO 2018047470 A1 WO2018047470 A1 WO 2018047470A1 JP 2017025888 W JP2017025888 W JP 2017025888W WO 2018047470 A1 WO2018047470 A1 WO 2018047470A1
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
- C09D183/04—Polysiloxanes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B15/06—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of natural rubber or synthetic rubber
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B25/00—Layered products comprising a layer of natural or synthetic rubber
- B32B25/20—Layered products comprising a layer of natural or synthetic rubber comprising silicone rubber
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/002—Priming paints
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/20—Diluents or solvents
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/63—Additives non-macromolecular organic
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F13/00—Coverings or linings, e.g. for walls or ceilings
- E04F13/07—Coverings or linings, e.g. for walls or ceilings composed of covering or lining elements; Sub-structures therefor; Fastening means therefor
- E04F13/08—Coverings or linings, e.g. for walls or ceilings composed of covering or lining elements; Sub-structures therefor; Fastening means therefor composed of a plurality of similar covering or lining elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2255/00—Coating on the layer surface
- B32B2255/06—Coating on the layer surface on metal layer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2255/00—Coating on the layer surface
- B32B2255/26—Polymeric coating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2255/00—Coating on the layer surface
- B32B2255/28—Multiple coating on one surface
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2419/00—Buildings or parts thereof
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/04—Polysiloxanes
- C08G77/14—Polysiloxanes containing silicon bound to oxygen-containing groups
- C08G77/16—Polysiloxanes containing silicon bound to oxygen-containing groups to hydroxyl groups
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/0091—Complexes with metal-heteroatom-bonds
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
- E04B2/88—Curtain walls
Definitions
- the present invention relates to a primer composition and a curtain wall unit useful for adhesion between a room temperature curable organopolysiloxane composition and various adherends, and particularly excellent in adhesion to adherends that are difficult to adhere such as acrylic electrodeposition coating.
- the present invention relates to a primer composition having excellent adhesion durability at high temperatures and sufficient workable time for coating work, and a curtain wall unit using the primer composition.
- silanes silane coupling agents, titanate esters, and solvents are used in the bonding of room temperature curable organopolysiloxane compositions used as building sealants, general industrial sealants, and adhesives to various substrates.
- “Urethane-based primers”, silane-modified acrylic resins, “acrylic primers” mainly composed of solvents have been used (see Patent Documents 1 to 6).
- silane coupling agent for the silane primer those having an amino group, an epoxy group, a mercapto group or an isocyanate group are generally used.
- a polyisocyanate compound of a urethane primer those obtained by an addition reaction of an isocyanate compound with a polyol such as polyethylene glycol or polypropylene glycol or a hydroxyl group-containing acrylic oligomer are known.
- the silane-based primer is useful for inorganic adherends such as metal and glass, and has good heat resistance, weather resistance, and durability.
- silane-based primers often do not have sufficient adhesion to organic adherends such as various resins, and in recent years, acrylic resins, which are frequently used for aluminum sashes, are mainly used. Adhesiveness to acrylic resin electrodeposited aluminum in which the component paint was electrodeposited on aluminum and fluorine resin coated aluminum in which a paint mainly composed of fluororesin was applied to aluminum was insufficient.
- the urethane-based primer can provide a certain degree of satisfactory adhesion to a wide range of adherends including metal-based and organic-based adherends. Since the durability such as the property and water resistance is insufficient, it is generally unsuitable for the use of a silicone curable composition that requires long-term durability. Further, even when silane-based and polyisocyanate-based blend primers are used, it is difficult to achieve both adhesiveness and durability.
- the acrylic primer is mainly composed of an acrylic resin having an alkoxysilyl group and a solvent.
- acrylic primers many are commercially available in which room temperature curable organopolysiloxane compositions exhibit good adhesion to various resins such as acrylic resins and polystyrene resins which are difficult to bond without a primer.
- resins such as acrylic resins and polystyrene resins which are difficult to bond without a primer.
- acrylic electrodeposition coated aluminum and fluororesin coated aluminum there are some which adhere to acrylic electrodeposition coated aluminum and fluororesin coated aluminum and have high heat resistance, weather resistance and water resistance.
- the heat resistance and weather resistance of acrylic primers are high among common organic resins, they are not as good as those of silicone, so adhesion of room temperature curable organopolysiloxane compositions when acrylic primers are used. Durability was affected by the durability of the resin layer formed by the acrylic primer, and was not sufficient as compared with the silane and silicone resin primers.
- silicone resin-based primers contain an organopolysiloxane resin as one of the active ingredients, with titanate esters, aminosilane coupling agents, silane compounds, etc. as adhesive components, such as glass, metals, and various resins. It is known that in addition to organic adherends, it is possible to achieve both adhesion to acrylic electrodeposition coated aluminum and fluororesin coating.
- the silicone resin-based primer has been suitably used as a primer for various adherends, mainly glass, metal, resin and resin-coated surfaces.
- the organopolysiloxane resin which is a film-forming component after the drying of the silicone resin primer, has poor adhesion to various adherends, so that the primer film can exhibit good adhesion to the adherend.
- metal alkoxides such as highly active titanates.
- Highly active titanic acid esters have high adhesion imparting ability, but have high hydrolyzability, so when using the primer composition in a humid environment, it reacts with moisture in the gas phase during the coating operation, In many cases, precipitates are formed in a short period of time, resulting in turbidity and problems of appearance and workability such as solidification and inapplicability.
- the adhesion performance of the primer may be lowered, which may cause a serious problem.
- the primer manufacturer recommends that the user apply the primer within 10 minutes after subdivision when opening the sealed container and dividing it into another open container before the application work. However, in actual work, it often takes 10 to 30 minutes, and it adheres well to difficult-to-adhere fluororesin coatings and acrylic electrodeposition coatings. Development of a primer composition that is excellent in durability and weather resistance, and that can exhibit good adhesion to various adherends without causing changes in appearance even when exposed to a humid environment during construction for a long time. It has been rare. Accordingly, the present invention provides a primer composition capable of expressing good adhesion to various adherends, excellent in various durability, and ensuring a long workable time, and a curtain wall unit using the primer composition The purpose is to provide.
- the present inventors have determined that the primer composition contains an organopolysiloxane resin having a specific structure, a titanium compound having a specific structure, and a solvent in a predetermined ratio. It was found that the above-mentioned problems can be solved by mixing in the above, and the present invention has been achieved.
- a primer composition for improving the adhesion between a base material selected from an organic resin, a metal and a resin-coated metal and a cured product of a room temperature-curable organopolysiloxane composition (A) R 3 SiO 1/2 units (wherein each R independently represents an unsubstituted or substituted monovalent hydrocarbon group having 1 to 6 carbon atoms) and SiO 4/2 units, and SiO 4 and organosiloxane polymer 100 parts by weight of the three-dimensional network molar ratio of R 3 SiO 1/2 unit is 0.6-1.2 for / 2 units, (B) 300 to 1000 parts by mass of a mixture of a titanium compound represented by the following formula (1) or an organooxy group-containing titanium compound containing 75 mol% or more of the titanium compound represented by the formula (1); Ti (OR 1 ) 3 (R
- a primer composition comprising 1000 to 8000 parts by mass of a solvent.
- the component (B) comprises (B1) tetraorganooxytitanium and / or its partially hydrolyzed condensate and (B2) acetoacetate, and (B2) acetoacetate with respect to 1 mole of titanium atom in (B1).
- the primer composition according to [1] wherein the primer composition is a mixture of reaction products produced by mixing esters in a ratio of 0.8 mol or more and less than 1.2 mol.
- the component (B) is composed of (B1) tetraorganooxytitanium and / or a partially hydrolyzed condensate thereof and (B3) an organooxy group in which two acetoacetate chelates are formed for one titanium atom.
- the primer composition according to [1] wherein the primer composition is a mixture of reaction products produced by mixing at a ratio of 0.8 mol to less than 1.2 mol.
- a curtain wall unit for fixing glass by a metal and / or resin-coated metal frame having on its surface a silicone rubber layer made of a cured product of a two-component dealcohol-free room temperature curable organopolysiloxane composition
- the primer composition according to any one of [1] to [5], which is used as a primer applied to the metal and / or metal-coated surface.
- [7] [6] A curtain wall unit obtained by adhering a cured layer of a room temperature-curable organopolysiloxane composition to a metal and / or a metal-coated surface through a coating layer of the primer composition according to [6].
- a primer composition that exhibits good adhesion to various adherends such as acrylic electrodeposited aluminum and fluororesin-coated aluminum, and provides a long working time during use and adhesion durability, and the primer composition A curtain wall unit using an object can be provided.
- the primer composition of the present invention is a primer composition that improves the adhesion between a substrate selected from an organic resin, a metal, and a resin-coated metal and a cured product of a room temperature-curable organopolysiloxane composition,
- A R 3 SiO 1/2 units (wherein each R independently represents an unsubstituted or substituted monovalent hydrocarbon group having 1 to 6 carbon atoms) and SiO 4/2 units, and SiO 4 and organosiloxane polymer 100 parts by weight of the three-dimensional network molar ratio of R 3 SiO 1/2 unit is 0.6-1.2 for / 2 units
- R 1 may be the same or different and is an unsubsti
- the (A) component organosiloxane polymer is a main component after drying the primer composition of the present invention (that is, after removing the solvent of the (C) component), and was applied onto the substrate. It becomes a component that determines the film forming property of the primer composition.
- the component (A) comprises R 3 SiO 1/2 units (wherein each R independently represents an unsubstituted or substituted monovalent hydrocarbon group having 1 to 6 carbon atoms) and SiO 4/2 units.
- R 3 SiO 1/2 units wherein each R independently represents an unsubstituted or substituted monovalent hydrocarbon group having 1 to 6 carbon atoms
- SiO 4/2 units SiO 4/2 units.
- each R is independently an alkyl group such as methyl, ethyl, propyl, isopropyl or hexyl, a cycloalkyl group such as cyclohexyl, an alkenyl group such as vinyl, allyl or propenyl, and an aryl group such as phenyl.
- a substituted hydrocarbon group is shown.
- Such a copolymer is a material known in the art obtained by cohydrolyzing and condensing a hydrolyzable triorganosilane and a hydrolyzable silane and siloxane containing no R group.
- the molar ratio of R 3 SiO 1/2 units to SiO 4/2 units is 0.6 to 1.2, preferably 0.7 to 1.0.
- the primer film after drying the primer becomes too hard, and when it exceeds 1.2, the primer film becomes brittle, resulting in poor adhesion and adhesion durability.
- the RSiO 3/2 unit and the R 2 SiO 2/2 unit are added to the total of the R 3 SiO 1/2 unit and the SiO 4/2 unit within a range not impairing the effect of the organosiloxane polymer. It may be contained in a proportion of ⁇ 10 mol%, particularly 0 to 5 mol%.
- the content of hydroxysilyl groups (silanol groups) in the organosiloxane polymer is 0.04 to 0.07 mol / 100 g.
- the hydroxysilyl group content is less than 0.04 mol / 100 g, the adhesiveness is poor, and when it exceeds 0.07 mol / 100 g, the durability is inferior.
- the above-mentioned organosiloxane polymer is contained in the range of 0.5 to 10% by mass, particularly 1 to 5% by mass, based on the total amount of the primer composition.
- Component (B) is an organooxy group-containing titanium containing 75 mol% or more, preferably 80 mol% or more, based on an organooxy group-containing titanium compound such as an alkoxy group-containing titanium compound represented by the following formula (1). It is a mixture of compounds.
- Ti (OR 1 ) 3 R 2 CH 2 COCH 2 COOCH 2 R 2 ) 1 (1)
- R 1 may be the same or different and is an unsubstituted or substituted monovalent hydrocarbon group
- R 2 may be the same or different, and is a hydrogen atom and / or one of unsubstituted or substituted ones. Valent hydrocarbon group.
- the component (B) comprises (B1) a tetraorganooxysilane such as tetraalkoxytitanium and / or a partially hydrolyzed condensate thereof and (B2) an acetoacetate, and a titanium atom in (B1). It may be a mixture of reaction products produced by mixing (B2) acetoacetate at a ratio of 0.8 mol or more and less than 1.2 mol with respect to 1 mol.
- the reaction between the (B1) component tetraorganooxysilane and the (B2) component acetoacetate easily proceeds quantitatively at room temperature (25 ° C.), and the (B1) component tetraorganooxysilane.
- One of four organooxy groups in silane is exchanged with acetoacetate to form a chelate complex represented by the formula (1), and all of the component (B1) is represented by the formula (1).
- the component (B) as a reaction product is represented by the formula ( 1)
- Organooxy group-containing titanium chelate compound comprising almost a single component (approximately 100 mol%) having three organooxy groups and one acetoacetate ligand in the molecule represented by 1)
- the mixing molar ratio of the component (B2) to 1 mol of the titanium atom in the component (B1) is 0.8
- the titanium chelate compound represented by the formula (1) and the raw material (B1) component are used.
- Titanium chelate compound shown and shown above B3 An alkoxy group-containing titanium chelate complex in which two acetoacetic acid ester chelates are formed for one titanium atom, which is a component, has a mole of about 4: 1 (about 0.8: 0.2). It becomes the mixture mixed by ratio. Accordingly, in any reaction product produced by mixing the components (B1) and (B2) within the mixing molar ratio, the titanium chelate compound represented by the formula (1) is used in any case. Are mixed at a ratio of about 80 mol% or more (at least 75 mol% or more).
- the component (B) contains (B1) tetraalkoxytitanium and / or a partially hydrolyzed condensate thereof and (B3) an alkoxy group containing a chelate of two acetoacetic acid esters for one titanium atom.
- the titanium chelate compound is an alkoxy group-containing titanium chelate compound in which (B3) two acetoacetate chelates are formed per one titanium atom with respect to one mole of titanium atom in (B1). It may be a mixture of reaction products produced by mixing at a ratio of 8 mol or more and less than 1.2 mol.
- the reaction between the tetraorganooxysilane (B1) component and the alkoxy group-containing titanium chelate compound in which two acetoacetate chelates are formed for one titanium atom of the component (B3) is performed at room temperature. It proceeds easily quantitatively at (25 ° C.), and two of the four organooxy groups in the tetraorganooxysilane that is the component (B1) are present in the component (B3). Since it exchanges with one of the acetoacetate chelates, two acetoacetate chelates are formed for each titanium atom in component (B1) and one titanium atom in component (B3).
- component (B1) When the mixing molar ratio with the alkoxy group-containing titanium chelate compound is 1: 1 (equal mole), the exchange reaction between the component (B1) and the component (B3) proceeds without excess or deficiency.
- Component (B), which is a reaction product, has a molar ratio of approximately 1 between the titanium chelate compound represented by formula (1) derived from component (B1) and the titanium chelate compound represented by formula (1) derived from component (B3).
- the chelate compound is a mixture of about 91 mol%). Accordingly, in any reaction product produced by mixing the components (B1) and (B3) within the mixing molar ratio, the titanium chelate compound represented by the formula (1) is used in any case. Are mixed at a ratio of about 89 mol% or more (at least 75 mol% or more).
- tetraorganooxytitanium such as tetraalkoxytitanium as a component (B1) and its partially hydrolyzed condensate are represented by the following general formula (2).
- Ti (OR 1 ) 4 (2) In the formula, R 1 may be the same or different, and is an unsubstituted or substituted monovalent hydrocarbon group.) These are tetraorganooxytitanium and partial hydrolysis condensates thereof.
- the monovalent hydrocarbon group R 1 is preferably, for example, a lower alkyl group having 8 or less carbon atoms.
- particularly preferred tetraalkoxytitanium is tetraethoxytitanium, tetrapropoxytitanium, tetraisopropoxytitanium, tetrabutoxytitanium, tetra (tert-butoxy) titanium, tetra (2-ethylhexoxy) titanium.
- alkoxy titaniums can be used singly or in combination of two or more, and can also be used in the form of a cohydrolyzate.
- the acetoacetic acid ester as the component (B2) is represented by the following general formula (3).
- R 2 CH 2 C ( ⁇ O) CH 2 C ( ⁇ O) OCH 2 R 2 (3) (In the formula, R 2 may be the same or different and is a hydrogen atom and / or an unsubstituted or substituted monovalent hydrocarbon group.)
- R 2 is preferably a hydrogen atom and / or a lower alkyl group having 8 or less carbon atoms.
- Methyl acetoacetate both R 2 is a hydrogen atom, and R 2 is a methyl group of the ester group side (right side), ethyl acetoacetate is preferably R 2 is a hydrogen atom the other (left).
- particularly preferred acetoacetate is ethyl acetoacetate, methyl acetoacetate, isopropyl acetoacetate, and t-butyl acetoacetate.
- acetoacetic esters can be used alone or in combination of two or more.
- the organooxy group-containing titanium chelate compound in which two acetoacetate chelates are formed per one titanium atom of the component (B3) is preferably a compound represented by the general formula (1), One in which one of three organooxy groups (OR 1 ) present in the molecule is further substituted with an acetoacetate ligand (R 2 CH 2 COCH 2 COOCH 2 R 2 ) (ie, This corresponds to a titanium chelate compound having two organooxy groups (OR 1 ) and two acetoacetate ligands (R 2 CH 2 COCH 2 COOCH 2 R 2 ) in one molecule.
- diisopropoxy titanium bis (ethyl acetoacetate), dinormal butoxy titanium bis (ethyl acetoacetate), ditarscha Over butoxy titanium bis (ethylacetoacetate), and di (2-ethylhexoxy) titanium bis diorgano oxytitanium bisacetoacetate complexes such dialkoxy titanium bis (ethylacetoacetate) complex (ethylacetoacetate) and the like, and the like.
- the component (B) is contained in the range of 1 to 20% by mass, particularly 3 to 10% by mass, based on the total amount of the primer composition.
- the blending amount of the component (B) is 300 to 1000 parts by mass with respect to 100 parts by mass of the component (A). Preferably, it is 350 to 800 parts by mass, and more preferably 400 to 700 parts by mass. If it is less than 300 parts by mass, the onset of adhesiveness is delayed and the desired adhesiveness cannot be obtained in a short time. In addition, when it exceeds 1000 parts by mass, the storage stability of the primer composition is lowered, and it becomes impossible to obtain the adhesive property of the primer composition to various base materials after a long period of production. The cured product of the curable composition often peels off from the substrate together with the primer composition.
- the solvent of component (C) is used for facilitating the coating operation and imparting quick drying properties by dissolving or dispersing the component (A) and the component (B).
- the type of the solvent of component (C) is not particularly limited as long as the primer composition does not lose transparency and uniformity, but is selected according to the solvent resistance of the target adherend, the brush working conditions, etc. Is done.
- Such solvents include, as good solvents for component (A), ketones such as acetone and methyl ethyl ketone, esters such as ethyl acetate and butyl acetate, n-hexane, n-heptane, isooctane (2,2,4-trimethyl). And aliphatic hydrocarbons such as pentane) and aromatic hydrocarbons such as toluene and xylene.
- alcohols include methanol, ethanol, isopropyl alcohol, and 2-ethyl-1-hexanol.
- the blending amount of the component (C) is 1000 to 8000 parts by mass, preferably 2000 to 7000 parts by mass, and more preferably 300 to 1000 parts by mass with respect to 100 parts by mass of the component (A).
- the blending amount of the component (C) is less than 1000 parts by mass, the primer film remaining on the substrate surface after applying and drying the primer composition becomes too thick, so that it is easy to peel off from the substrate.
- the amount of the component (A) and the component (B) increases relatively, which is disadvantageous in terms of cost.
- the blending amount of component (C) exceeds 8000 parts by mass, the layer of the primer composition after drying becomes too thin, not only the function of improving adhesiveness is lost, but also the viscosity is lowered. The working time of the primer in a humid environment is shortened.
- a hydrolyzable group-containing silane such as an alkyltrialkoxysilane is optionally contained as an optional component in order to improve the storage stability of the primer composition of the present invention. Also good.
- examples of the alkyltrialkoxysilane include methyltrimethoxysilane, methyltriethoxysilane, ethyltrimethoxysilane, n-propyltrimethoxysilane, and vinyltrimethoxysilane. Methoxysilane is preferred.
- the blending amount of component (D) is 0.1 to 100 parts by mass with respect to 100 parts by mass of component (A).
- the amount is preferably 0.5 to 10 parts by mass, and more preferably 1 to 5 parts by mass.
- the primer composition thickens during storage, so the period until gelation is accelerated.
- the amount exceeds 100 parts by mass, there is almost no disadvantage in terms of performance, but the cost is reduced. Disadvantageous.
- ⁇ Other additives> Other optional components can be added to the primer composition of the present invention as long as the performance is not impaired. These components include, as silanol condensation catalysts, organotin compounds such as dibutyltin dimethoxide, dibutyltin diacetate, dibutyltin dioctanoate, dibutyltin dilaurate; aluminum alkoxides such as aluminum acetylacetonate; zirconium alkoxides such as zirconium acetylacetonate A silane coupling agent etc. are mentioned as an adhesion imparting agent. These types and addition amounts are selected according to the application.
- the primer composition of the present invention does not contain an amino group-containing silane coupling agent, an epoxy group-containing silane coupling agent, or an isocyanurate ring-containing silane.
- ⁇ Adhesion method using primer composition> To bond and cure a cured product of a room temperature curable organopolysiloxane composition (typically a condensation reaction curing type room temperature curable silicone rubber composition) to various substrates using the primer composition of the present invention, Brush the primer composition of the present invention on the surface of various substrates such as metal, resin-coated metal (for example, organic resin-coated metal surfaces such as aluminum coated with acrylic resin or fluororesin-based paint) After coating and drying, the curable composition is brought into contact with the coated surface and cured.
- a primer composition can be applied for 20 minutes or more (pot life) after being transferred from a sealed container to an open container in an environment of a temperature of 23 ( ⁇ 10) ° C. and a relative humidity of 50 ( ⁇ 25)%. ).
- the drying time of the primer composition after coating is preferably in the range of 5 minutes to 480 minutes at room temperature (about 25 ° C.), more preferably 10 minutes to 120 minutes. If the drying time is shorter than 5 minutes, the solvent is not sufficiently dried and the strength of the primer layer after drying cannot be obtained. Moreover, when drying time exceeds 480 minutes, there exists a possibility that contaminants, such as dust in the air or dust, may adhere to the surface, and there exists a possibility of inhibiting adhesion
- the thickness of the primer layer is usually about 0.1 to 500 ⁇ m, preferably 1 to 100 ⁇ m, more preferably about 5 to 50 ⁇ m.
- a room temperature curable organopolysiloxane composition is further formed on the coated surface on which the primer layer is formed.
- the room temperature curable organopolysiloxane composition is usually divided into two components, a main agent and a curing agent, and by mixing them at the time of use, the curing starts and it can be made rubbery. Since the two components are stored in advance, the storage stability is good, and there is an advantage that the curing rate can be appropriately adjusted by the amount of the curing agent.
- the curing mechanism is mainly cured between a silanol group and a hydrolyzable group by using a catalyst such as an organic titanium compound, in addition to an acid, an alkali, an organic tin compound, and the like, by dealcoholizing.
- room temperature curable organopolysiloxane composition for example, SEALANT-FC-295SG (manufactured by Korea Shin-Etsu Silicone Co., Ltd.) can be used, and the composition is used at room temperature (about 25 ° C.).
- the curing can be performed for 0.5 hours to 28 days, preferably 3 hours to 21 days, more preferably 6 hours to 14 days.
- the thickness of the cured product (silicone rubber layer) of the room temperature curable organopolysiloxane composition is usually about 100 to 1000000 ⁇ m, preferably about 1000 to 100000 ⁇ m.
- Such a primer composition can be applied to indoor seals such as a water frame (kitchen, washroom, bathroom) as well as a window frame seal and a high-rise building outer wall waterproof seal.
- a curtain wall unit in which a glass is fixed by a metal and / or resin-coated metal frame having a silicone rubber layer made of a cured product of a dealcohol-free room temperature curable organopolysiloxane composition on the surface, And / or the primer composition used as a primer applied to a metal coating surface is suitable.
- a curtain wall unit in which a cured layer of a room temperature-curable organopolysiloxane composition is bonded to a metal and / or a metal-coated surface through a coating layer of the primer composition is useful.
- the primer composition of the present invention is effective as an adhesion-imparting agent, an adhesion improver and an adhesion development improver for bonding a cured product (silicone rubber) of a room temperature curable organopolysiloxane composition to various substrates.
- curable compositions having a silyl group capable of forming a siloxane bond with the primer composition such as modified silicone curable compositions and silylated polyurethane systems. Is also effective.
- Me represents a methyl group.
- Examples 1 to 6 and Comparative Examples 1 to 6 were produced by the following method.
- Example 1 70% by mass of a three-dimensional network-structured organosiloxane polymer comprising Me 3 SiO 1/2 units and SiO 4/2 units, wherein the molar ratio of Me 3 SiO 1/2 units to SiO 4/2 units is 0.85 143 parts by mass of toluene solution, 4750 parts by mass of normal hexane, 50 parts by mass of isopropyl alcohol, 400 parts by mass of tetranormal butoxytitanium (1.18 mol), 150 parts by mass of ethyl acetoacetate (1.15 mol) were added, and room temperature (25 C.) to obtain a light yellow transparent primer composition.
- a three-dimensional network-structured organosiloxane polymer comprising Me 3 SiO 1/2 units and SiO 4/2 units, wherein the molar ratio of Me 3 SiO 1/2 units to SiO 4/2 units is 0.85 143 parts by mass of toluene solution, 4750 parts by mass of normal hexane, 50 parts by mass of is
- Example 2 A pale yellow transparent primer composition was obtained in the same manner as in Example 1 except that ethyl acetoacetate was changed from 150 parts by mass to 130 parts by mass (1.00 mol).
- Example 3 Example 1 was changed except that ethyl acetoacetate was changed from 150 parts by mass to 145 parts by mass (1.12 mol) and tetranormal butoxytitanium was changed from 400 parts by mass to 330 parts by mass (0.97 mol). A light yellow transparent primer composition was obtained.
- Example 4 Instead of 150 parts by mass of ethyl acetoacetate, 280 parts by mass (0.56 mol) of a 95 mass% isopropyl alcohol solution of diisopropoxytitanium bisethylacetoacetate was used, and 400 parts by mass of tetranormal butoxytitanium was 270 parts by mass (0. A pale yellow transparent primer composition was obtained in the same manner as in Example 1 except that the amount was changed to 79 mol).
- Example 5 Instead of 150 parts by mass of ethyl acetoacetate, 315 parts by mass (0.66 mol) of a 95% by mass isopropyl alcohol solution of diisopropoxytitanium bisethylacetoacetate was used, and 240 parts by mass of tetranormal butoxytitanium (0. A light yellow transparent primer composition was obtained in the same manner as in Example 1 except that the amount was changed to 71 mol).
- Example 6 Instead of 150 parts by mass of ethyl acetoacetate, 340 parts by mass (0.71 mol) of a 95 mass% isopropyl alcohol solution of diisopropoxytitanium bisethylacetoacetate was used, and 400 parts by mass of tetranormal butoxytitanium was 215 parts by mass (0. A light yellow transparent primer composition was obtained in the same manner as in Example 1 except that the amount was changed to 63 mol).
- Each primer composition was applied to an acrylic electrodeposited aluminum plate with a brush and left for 30 minutes at 23 ° C. and 50% relative humidity (RH), followed by a dealcoholizing two-component silicone sealant ( SEALANT-FC-295SG (made by Korea Shin-Etsu Silicone Co., Ltd.) and a mixture of the main agent and curing agent were applied to the coated surface of the aluminum plate coated with each primer composition, 10mm wide, 50mm long, 2mm A test piece was formed by molding with a spatula into a thick shape.
- SEALANT-FC-295SG made by Korea Shin-Etsu Silicone Co., Ltd.
- the primer composition of the present invention can be suitably used for adhesion between a sealing material for construction, a general industrial sealing material, a room temperature curable organopolysiloxane composition used as an adhesive, and various adherends,
- its industrial value is excellent because it has excellent adhesion to difficult-to-adhere adherends such as acrylic electrodeposition coating, has excellent adhesion durability at high temperatures, and has sufficient workable time for application work. It ’s big.
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Abstract
Description
そこで、本発明は、各種被着体への良好な接着性を発現可能で、各種の耐久性に優れるとともに、長い作業可能時間を確保したプライマー組成物及び該プライマー組成物を用いたカーテンウォールユニットを提供することを目的とする。
[1]
有機樹脂、金属及び樹脂塗装された金属から選ばれる基材と室温硬化性オルガノポリシロキサン組成物の硬化物との接着性を向上させるプライマー組成物であって、
(A)R3SiO1/2単位(式中、各Rは独立に炭素数1~6の非置換又は置換の1価炭化水素基を表す。)及びSiO4/2単位を含み、SiO4/2単位に対するR3SiO1/2単位のモル比が0.6~1.2である三次元網状構造のオルガノシロキサンポリマー 100質量部と、
(B)下記式(1)で表されるチタン化合物又は式(1)で表わされるチタン化合物を75モル%以上含有するオルガノオキシ基含有チタン化合物の混合物 300~1000質量部と、
Ti(OR1)3(R2CH2COCH2COOCH2R2)1 … (1)
(式中、R1は同一でも異なっていてもよく、非置換又は置換の一価炭化水素基であり、R2は同一でも異なっていてもよく、水素原子及び/又は非置換又は置換の一価炭化水素基である。)
(C)溶剤 1000~8000質量部
を含んでなることを特徴とするプライマー組成物。
[2]
前記(B)成分は、(B1)テトラオルガノオキシチタン及び/又はその部分加水分解縮合物と(B2)アセト酢酸エステルとを、(B1)中のチタン原子1モルに対して(B2)アセト酢酸エステルを0.8モル以上1.2モル未満の比率で混合して生成する反応生成物の混合物であることを特徴とする[1]記載のプライマー組成物。
[3]
前記(B)成分は、(B1)テトラオルガノオキシチタン及び/又はその部分加水分解縮合物と(B3)チタン原子1個に対して2個のアセト酢酸エステルのキレートが形成されているオルガノオキシ基含有チタンキレート化合物とを、(B1)中のチタン原子1モルに対して、(B3)チタン原子1個に対して2個のアセト酢酸エステルのキレートが形成されているオルガノオキシ基含有チタンキレート化合物を0.8モル以上1.2モル未満の比率で混合して生成する反応生成物の混合物であることを特徴とする[1]記載のプライマー組成物。
[4]
アミノ基含有シランカップリング剤、エポキシ基含有シランカップリング剤、イソシアヌレート環含有シランを含有しないものである[1]~[3]のいずれかに記載のプライマー組成物
[5]
温度23℃、相対湿度50%の環境下で、密封容器から開放容器へ移した後、20分以上の塗布可能時間を有するものである[1]~[4]のいずれかに記載のプライマー組成物。
[6]
2成分型の脱アルコール型室温硬化性オルガノポリシロキサン組成物の硬化物からなるシリコーンゴム層を表面に有する金属製及び/又は樹脂塗装された金属製の枠体によってガラスを固定するカーテンウォールユニットにおいて、該金属及び/又は金属塗装面へ塗布するプライマーとして使用されるものである[1]~[5]のいずれかに記載のプライマー組成物。
[7]
[6]記載のプライマー組成物の塗布層を介して室温硬化性オルガノポリシロキサン組成物の硬化物層を金属及び/又は金属塗装面へ接着したものであるカーテンウォールユニット。
(A)R3SiO1/2単位(式中、各Rは独立に炭素数1~6の非置換又は置換の1価炭化水素基を表す。)及びSiO4/2単位を含み、SiO4/2単位に対するR3SiO1/2単位のモル比が0.6~1.2である三次元網状構造のオルガノシロキサンポリマー 100質量部と、
(B)下記式(1)で表されるチタン化合物又は式(1)で表わされるチタン化合物を75モル%以上含有するオルガノオキシ基含有チタン化合物の混合物 300~1000質量部と、
Ti(OR1)3(R2CH2COCH2COOCH2R2)1 … (1)
(式中、R1は同一でも異なっていてもよく、非置換又は置換の一価炭化水素基であり、R2は同一でも異なっていてもよく、水素原子及び/又は非置換又は置換の一価炭化水素基である。)
(C)溶剤 1000~8000質量部
を含んでなることを特徴とするプライマー組成物である。
以下に、本発明のプライマー組成物に含有される各成分について詳述する。
(A)成分のオルガノシロキサンポリマーは、本発明のプライマー組成物の乾燥後(即ち、(C)成分の溶剤を乾燥除去した後)の主成分となる成分であり、基材上に塗布されたプライマー組成物の造膜性を決定づける成分となる。
(B)成分は、本発明のプライマー組成物の基材への接着性を向上させるとともに、室温硬化性オルガノポリシロキサン組成物の硬化物(シリコーンゴム層)とプライマー組成物の接着性の発現する時間を短縮する接着促進剤としての役割を担う。
Ti(OR1)3(R2CH2COCH2COOCH2R2)1 … (1)
(式中、R1は同一でも異なっていても良く、非置換又は置換の一価炭化水素基であり、R2は同一でも異なっていても良く、水素原子及び/又は非置換又は置換の一価炭化水素基である。)
Ti(OR1)2(R2CH2COCH2COOCH2R2)2 … (1)’
(式中、R1及びR2の定義は同じである。)
Ti(OR1)4 … (2)
(式中、R1は同一でも異なっていても良く、非置換又は置換の一価炭化水素基である。)
で表されるテトラオルガノオキシチタン及びその部分加水分解縮合物である。一般式(2)において、一価炭化水素基R1としては、例えば炭素原子数8以下の低級アルキル基が好適である。本発明において、特に好適なテトラアルコキシチタンは、テトラエトキシチタン、テトラプロポキシチタン、テトライソプロポキシチタン、テトラブトキシチタン、テトラ(tert-ブトキシ)チタン、テトラ(2-エチルヘキソキシ)チタンである。これらのアルコキシチタンは、1種単独でも2種以上を組み合わせて使用することもでき、また共加水分解物の形でも使用することができる。アルコキシ基が異なる2種のアルコキシチタンを混合した場合は、両者のアルコキシ基の一部が経時で交換反応を起こすことが知られており、アルコキシチタンのアルコキシ基の設計自由度を上げている。また、アルコール類やアルコキシシランと混合した際にはアルコキシ基の一部又は全部が交換することも知られている。このため、プライマー組成物中にアルコール類やアルコキシシランを含む場合は、そのアルコール類がアルコキシ基に交換されても性能的な不利益を生じないように種類を選択したり、量を調整する必要がある。
R2CH2C(=O)CH2C(=O)OCH2R2 … (3)
(式中、R2は同一でも異なっていても良く、水素原子及び/又は非置換又は置換の一価炭化水素基である。)
(C)成分の溶剤は、(A)成分及び(B)成分を溶解又は分散させることで、塗布作業を容易にし、速乾性を付与するために用いられる。(C)成分の溶剤の種類は、プライマー組成物が透明性や均一性を失わない限り、特に限定されることはないが、対象とする被着体の耐溶剤性や刷毛作業条件等により選定される。
(D)成分の添加剤として、本発明のプライマー組成物の貯蔵安定性等を向上するために、任意成分として必要に応じて、アルキルトリアルコキシシランなどの加水分解性基含有シランを含有してもよい。(D)成分のうち、アルキルトリアルコキシシランとしては、例えば、メチルトリメトキシシラン、メチルトリエトキシシラン、エチルトリメトキシシラン、n-プロピルトリメトキシシラン、ビニルトリメトキシシランが挙げられ、その中でもメチルトリメトキシシランが好ましい。
本発明のプライマー組成物には、その性能を損なわない範囲でその他にも任意の成分を添加できる。それらの成分としては、シラノール縮合触媒として、ジブチル錫ジメトキサイド、ジブチル錫ジアセテート、ジブチル錫ジオクタノエート、ジブチル錫ジラウレート等の有機錫化合物;アルミニウムアセチルアセトナート等のアルミニウムアルコキシド;ジルコニウムアセチルアセトナート等のジルコニウムアルコキシド;接着付与剤としてシランカップリング剤等が挙げられる。これらの種類及び添加量は用途に応じ選定される。
なお、本発明のプライマー組成物には、アミノ基含有シランカップリング剤、エポキシ基含有シランカップリング剤、イソシアヌレート環含有シランを含有しない。
本発明のプライマー組成物を使用して室温硬化性オルガノポリシロキサン組成物(典型的には縮合反応硬化型の室温硬化性シリコーンゴム組成物)の硬化物を各種基材に接着硬化させるには、金属、樹脂塗装金属(例えば、アクリル樹脂やフッ素樹脂を主成分とする塗料を塗装したアルミニウムなどの有機樹脂塗装金属表面)又は有機樹脂等の各種基材表面に本発明のプライマー組成物をハケ等で塗布して乾燥させた後、この塗布面に硬化性組成物を接触させて硬化させる。
このようなプライマー組成物は、温度23(±10)℃、相対湿度50(±25)%の環境下で、密封容器から開放容器へ移した後、20分以上の塗布可能時間(可使時間)を有するものである。
このような室温硬化性オルガノポリシロキサン組成物には、例えば、SEALANT-FC-295SG(韓国信越シリコーン株式会社製)を使用することができるが、該組成物は、常温(25℃程度)において、0.5時間~28日、好ましくは3時間~21日、より好ましくは6時間~14日程度の下で硬化させることができる。なお、室温硬化性オルガノポリシロキサン組成物の硬化物(シリコーンゴム層)の厚さは、通常100~1000000μm、好ましくは1000~100000μm程度が好適である。
表1に示した成分に基づいて、実施例1~6及び比較例1~6を下記方法により生成した。
Me3SiO1/2単位及びSiO4/2単位からなり、SiO4/2単位に対するMe3SiO1/2単位のモル比が0.85である三次元網状構造のオルガノシロキサンポリマーの70質量%トルエン溶液143質量部、ノルマルヘキサン4750質量部、イソプロピルアルコール50質量部、テトラノルマルブトキシチタン400質量部(1.18モル)、アセト酢酸エチル150質量部(1.15モル)を加え、室温(25℃)にて均一に混合することにより淡黄色透明なプライマー組成物を得た。
アセト酢酸エチルを150質量部から130質量部(1.00モル)に変更した以外は実施例1と同様に淡黄色透明なプライマー組成物を得た。
アセト酢酸エチルを150質量部から145質量部(1.12モル)に変更し、テトラノルマルブトキシチタンを400質量部から330質量部(0.97モル)に変更した以外は実施例1と同様に淡黄色透明なプライマー組成物を得た。
アセト酢酸エチル150質量部のかわりにジイソプロポキシチタンビスエチルアセトアセテートの95質量%イソプロピルアルコール溶液280質量部(0.56モル)を使用し、テトラノルマルブトキシチタン400質量部を270質量部(0.79モル)に変更した以外は実施例1と同様に淡黄色透明なプライマー組成物を得た。
アセト酢酸エチル150質量部のかわりにジイソプロポキシチタンビスエチルアセトアセテートの95質量%イソプロピルアルコール溶液315質量部(0.66モル)を使用し、テトラノルマルブトキシチタン400質量部を240質量部(0.71モル)に変更した以外は実施例1と同様に淡黄色透明なプライマー組成物を得た。
アセト酢酸エチル150質量部のかわりにジイソプロポキシチタンビスエチルアセトアセテートの95質量%イソプロピルアルコール溶液340質量部(0.71モル)を使用し、テトラノルマルブトキシチタン400質量部を215質量部(0.63モル)に変更した以外は実施例1と同様に淡黄色透明なプライマー組成物を得た。
アセト酢酸エチルを使用しないこと以外は実施例1と同様に淡黄色透明なプライマー組成物を得た。
アセト酢酸エチルを150質量部から100質量部(0.77モル)に変更した以外は実施例1と同様に淡黄色透明なプライマー組成物を得た。
アセト酢酸エチルを150質量部から300質量部(2.31モル)に変更した以外は実施例1と同様に淡黄色透明なプライマー組成物を得た。
ノルマルヘキサンを4750質量部から15000質量部に変更した以外は実施例1と同様に淡黄色透明なプライマー組成物を得た。
アセト酢酸エチル150質量部のかわりにジイソプロポキシチタンビスエチルアセトアセテートの95質量%イソプロピルアルコール溶液190質量部(0.40モル)を使用し、テトラノルマルブトキシチタン400質量部を360質量部(1.06モル)に変更した以外は実施例1と同様に淡黄色透明なプライマー組成物を得た。
アセト酢酸エチル150質量部のかわりにジイソプロポキシチタンビスエチルアセトアセテートの95質量%イソプロピルアルコール溶液380質量部(0.80モル)を使用し、テトラノルマルブトキシチタン400質量部を180質量部(0.53モル)に変更した以外は実施例1と同様に淡黄色透明なプライマー組成物を得た。
実施例1~6、比較例1~6で得られた各プライマー組成物について、アルミ塗板に対する接着性を、以下の方法により評価した。
各プライマー組成物をアクリル電着塗装アルミの板に刷毛で塗布し、23℃、相対湿度(RH)50%の条件下において30分間放置した後、脱アルコールタイプの2成分型シリコーン系シーリング材(SEALANT-FC-295SG:韓国信越シリコーン株式会社製)の主剤と硬化剤とを混合したものを、各プライマー組成物が塗布されたアルミ板の塗布面に塗布し、10mm幅、50mm長さ、2mm厚の形状にヘラで成型して試験片とした。
この試験片を以下の条件で養生した後、シリコーン系シーリング材の硬化物をナイフでカットし該カット部を手剥離して(手で摘んで引張り)、その剥離状態を観察(ナイフカットによる手剥離試験)することで、被着体とプライマー組成物との接着界面の状態を評価した。
初期接着性については、温度23℃、相対湿度50%の環境下において7日間養生した後に、上記ナイフカットによる手剥離試験により評価した。評価は、シーリング材の凝集破壊した面積の割合が100%であったものを「◎」、同80%以上100%未満であったものを「○」、同50%以上80%未満であったものを「△」、同50%未満であったものを「×」とした。各プライマー組成物を使用した場合の初期接着性の試験結果を表2に示した。
耐水接着性については、温度23℃、相対湿度50%の環境下において7日間養生後に、50℃の温水に7日間浸漬した後に、初期接着性の試験方法と同様の方法により評価した。各プライマー組成物を使用した場合の耐水接着性の試験結果を表2に示した。
実施例1~6、比較例1~6で得られた各プライマー組成物について、作業可能時間を、以下の方法により評価した。
得られた各プライマー組成物を3gアルミシャーレに取り、23℃、50%RHに調整された恒温恒湿室の中で30分間静置後、外観変化を確認した。透明な液体の性状を維持している場合には○、白濁、ゲル化したり、乾燥固化した場合には×と評価した。各プライマーを使用した場合の作業可能時間の試験結果を表2に示した。
また、この30分静置後のプライマーを使用して接着性試験を実施し、結果を表2に示した。
Claims (7)
- 有機樹脂、金属及び樹脂塗装された金属から選ばれる基材と室温硬化性オルガノポリシロキサン組成物の硬化物との接着性を向上させるプライマー組成物であって、
(A)R3SiO1/2単位(式中、各Rは独立に炭素数1~6の非置換又は置換の1価炭化水素基を表す。)及びSiO4/2単位を含み、SiO4/2単位に対するR3SiO1/2単位のモル比が0.6~1.2である三次元網状構造のオルガノシロキサンポリマー 100質量部と、
(B)下記式(1)で表されるチタン化合物又は式(1)で表わされるチタン化合物を75モル%以上含有するオルガノオキシ基含有チタン化合物の混合物 300~1000質量部と、
Ti(OR1)3(R2CH2COCH2COOCH2R2)1 … (1)
(式中、R1は同一でも異なっていてもよく、非置換又は置換の一価炭化水素基であり、R2は同一でも異なっていてもよく、水素原子及び/又は非置換又は置換の一価炭化水素基である。)
(C)溶剤 1000~8000質量部
を含んでなることを特徴とするプライマー組成物。 - 前記(B)成分が、(B1)テトラオルガノオキシチタン及び/又はその部分加水分解縮合物と(B2)アセト酢酸エステルとを、(B1)中のチタン原子1モルに対して(B2)アセト酢酸エステルを0.8モル以上1.2モル未満の比率で混合して生成する反応生成物の混合物であることを特徴とする請求項1に記載のプライマー組成物。
- 前記(B)成分が、(B1)テトラオルガノオキシチタン及び/又はその部分加水分解縮合物と(B3)チタン原子1個に対して2個のアセト酢酸エステルのキレートが形成されているオルガノオキシ基含有チタンキレート化合物とを、(B1)中のチタン原子1モルに対して、(B3)チタン原子1個に対して2個のアセト酢酸エステルのキレートが形成されているオルガノオキシ基含有チタンキレート化合物を0.8モル以上1.2モル未満の比率で混合して生成する反応生成物の混合物であることを特徴とする請求項1に記載のプライマー組成物。
- アミノ基含有シランカップリング剤、エポキシ基含有シランカップリング剤、イソシアヌレート環含有シランを含有しないものである請求項1~3のいずれか1項に記載のプライマー組成物。
- 温度23℃、相対湿度50%の環境下で、密封容器から開放容器へ移した後、20分以上の塗布可能時間を有するものである請求項1~4のいずれか1項に記載のプライマー組成物。
- 2成分型の脱アルコール型室温硬化性オルガノポリシロキサン組成物の硬化物からなるシリコーンゴム層を表面に有する金属製及び/又は樹脂塗装された金属製の枠体によってガラスを固定するカーテンウォールユニットにおいて、該金属及び/又は金属塗装面へ塗布するプライマーとして使用されるものである請求項1~5のいずれか1項に記載のプライマー組成物。
- 請求項6記載のプライマー組成物の塗布層を介して室温硬化性オルガノポリシロキサン組成物の硬化物層を金属及び/又は金属塗装面へ接着したものであるカーテンウォールユニット。
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EP17848415.0A EP3511380A4 (en) | 2016-09-09 | 2017-07-18 | PRIMER COMPOSITION AND CURTAIN FACADE |
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US20230203340A1 (en) | 2023-06-29 |
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