WO2009084511A1 - 活性エネルギー線硬化型圧着塗膜形成用組成物およびそれを用いた剥離性接着加工紙 - Google Patents
活性エネルギー線硬化型圧着塗膜形成用組成物およびそれを用いた剥離性接着加工紙 Download PDFInfo
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- WO2009084511A1 WO2009084511A1 PCT/JP2008/073332 JP2008073332W WO2009084511A1 WO 2009084511 A1 WO2009084511 A1 WO 2009084511A1 JP 2008073332 W JP2008073332 W JP 2008073332W WO 2009084511 A1 WO2009084511 A1 WO 2009084511A1
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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
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
- C09J133/04—Homopolymers or copolymers of esters
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
- B05D5/005—Repairing damaged coatings
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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
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
- C09J133/04—Homopolymers or copolymers of esters
- C09J133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
- C09J133/08—Homopolymers or copolymers of acrylic acid esters
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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
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J4/00—Adhesives based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; adhesives, based on monomers of macromolecular compounds of groups C09J183/00 - C09J183/16
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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
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
- C09J7/22—Plastics; Metallised plastics
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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
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
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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
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/40—Adhesives in the form of films or foils characterised by release liners
- C09J7/401—Adhesives in the form of films or foils characterised by release liners characterised by the release coating composition
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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
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/40—Adhesives in the form of films or foils characterised by release liners
- C09J7/405—Adhesives in the form of films or foils characterised by release liners characterised by the substrate of the release liner
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2312/00—Crosslinking
- C08L2312/06—Crosslinking by radiation
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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
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/30—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/40—Additional features of adhesives in the form of films or foils characterized by the presence of essential components
- C09J2301/416—Additional features of adhesives in the form of films or foils characterized by the presence of essential components use of irradiation
Definitions
- the present invention relates to a composition for forming a pressure-bonded coating film that enables releasable adhesion by pressure bonding, and is a composition for forming an active energy ray-curable pressure-bonded coating film that is cured by active energy rays, and a releasable adhesion using the same It relates to processed paper.
- Patent Documents 1 and 2 In order to improve the glossiness and working efficiency of the surface, at least selected from a (meth) acrylic copolymer having a specific molecular weight and glass transition temperature, and an ultraviolet curable monomer and oligomer having a (meth) acryloyl group It has been proposed to use an adhesive composition containing a kind of ultraviolet curable component and a photopolymerization initiator (Patent Documents 1 and 2).
- an adhesive composition containing a (meth) acryloyl group-containing elastic body having a specific molecular weight, an ultraviolet curable component, and a photopolymerization initiator and having the above three components set to a specific content ratio is used. It is also considered to do (Patent Document 3). JP-A-11-349854 JP 2000-136320 A JP 2004-210879 A
- the adhesive compositions as described in Patent Documents 1 and 2 are in a state in which the composition components are compatible with each other and are uniformly dispersed and have excellent coating stability, but have a problem in curability and are slightly bent when folded. May occur. Moreover, the problem that the adhesive force becomes too strong with the passage of time also arises. On the other hand, the adhesive composition of Patent Document 3 solves such a problem of curability and is excellent in curability and has little change in adhesive strength over time. The stable adhesiveness was not obtained.
- the market demands an adhesive composition that is excellent in surface gloss of the printing surface, processing work efficiency, and processed paper manufacturing cost performance.
- An object of the present invention is to provide a composition for forming an active energy ray-curable pressure-sensitive adhesive coating film that has excellent adhesive strength after curing and excellent releasability at the time of peeling, and a releasable adhesive-processed paper using the same.
- the present invention provides an active energy ray-curable pressure-bonding comprising a carboxyl group-containing acrylic polymer (A), an active energy ray-curable component (B), and a photopolymerization initiator (C).
- the composition for forming a die-bonded coating film is a first gist.
- the second gist is a peelable adhesive-treated paper in which the composition for forming an active energy ray-curable pressure-sensitive adhesive coating film is coated on a paper surface and cured with an active energy ray.
- the photopolymerization initiator is increased too much, the cured product has a low molecular weight, and therefore there is a tendency to suppress the content. It has been found that by containing a carboxyl group, an excellent adhesive composition for peelable adhesive processed paper can be obtained.
- a folded sheet-like postcard used in the postcard system has a fine silica gel particle that adheres to the paper surface by pressing, so that the paper surfaces stick to each other. Since they do not mesh with each other, they do not stick again.
- a finer sea-island structure is created on the surface after curing, and by acting as the silica gel, good press adhesion (after peeling) It is considered that it exhibits re-adhesion prevention property.
- carboxyl groups in the acrylic polymer, the distance between the carboxyl groups is reduced by pressing, and the adhesive force is increased by becoming a distance that allows interaction (hydrogen bonding).
- carboxyl groups are sterically hindered. Therefore, it is considered that the adhesive force can be prevented from increasing to such an extent that peeling becomes difficult.
- this invention contains a carboxyl group-containing acrylic polymer (A), an active energy ray-curable component (B), a photopolymerization initiator (C), and contains the photopolymerization initiator (C).
- An active energy ray-curable pressure-sensitive adhesive film-forming composition having an amount of 10 to 30 parts relative to 100 parts by weight (hereinafter referred to as “parts”) of the active energy ray-curable component (B). Therefore, it eliminates the need for good coating and drying steps during coating, improves the efficiency of processing operations, and enables good curing, with excellent surface gloss and adhesion after curing. When peeled, it has good peelability. Therefore, the peelable adhesive processed paper using this has such excellent adhesive force and peelability, and is highly practical.
- the coatability is further improved.
- the resulting adhesive layer has excellent flexibility.
- the adhesive strength is further improved.
- the peelable adhesive force is further improved.
- (B1) At least one of epoxy (meth) acrylate and urethane (meth) acrylate.
- B2 An ethylenically unsaturated compound other than (b1) having two or more ethylenically unsaturated groups.
- (B3) An ethylenically unsaturated compound other than (b1) having one ethylenically unsaturated group.
- the content ratio of (b1) to (b3) is 5 to 20% by weight of (b1), 40 to 80% by weight of (b2), and (b3) with respect to the entire active energy ray-curable component (B). When it is 10 to 40% by weight, the balance between the adhesive force and the peelability can be further improved.
- composition for forming an active energy ray-curable pressure-sensitive adhesive coating film of the present invention is a carboxyl group-containing acrylic polymer (A), active energy ray-curing property.
- a composition for forming a pressure-bonded coating film comprising a component (B) and a photopolymerization initiator (C), and active energy such as ultraviolet rays, infrared rays, electromagnetic waves such as X-rays and ⁇ rays, and electron beams Curing with wire.
- active energy such as ultraviolet rays, infrared rays, electromagnetic waves such as X-rays and ⁇ rays, and electron beams Curing with wire.
- Carboxyl group-containing acrylic polymer (A) is obtained by copolymerizing a (meth) acrylic acid alkyl ester (a1) and a carboxyl group-containing monomer (a2).
- the copolymerizable monomer (a3) may be copolymerized.
- (meth) acrylic acid is acrylic acid or methacrylic acid
- (meth) acryl is acrylic or methacrylic
- (meth) acryloyl is acryloyl or methacryloyl
- (meth) acrylate is acrylate or Each means methacrylate.
- Examples of the (meth) acrylic acid alkyl ester (a1) include nonyl (meth) acrylate, n-octyl (meth) acrylate, iso-octyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, n-butyl ( And (meth) acrylate, iso-butyl (meth) acrylate, tert-butyl (meth) acrylate, n-propyl (meth) acrylate, methyl (meth) acrylate, ethyl (meth) acrylate, and the like.
- (meth) acrylic acid alkyl esters having 1 to 10 carbon atoms in the alkyl group are preferably used, and (meth) acrylic acid alkyl esters having 1 to 5 carbon atoms in the alkyl group are particularly preferably used.
- ethyl (meth) acrylate and n-butyl (meth) acrylate are particularly preferably used.
- One or more of these (meth) acrylic acid alkyl esters (a1) are used.
- carboxyl group-containing monomer (a2) examples include (meth) acrylic acid, crotonic acid, maleic acid, maleic anhydride, itaconic acid, fumaric acid, acrylamide-N-glycolic acid, cinnamic acid, and (meth) acrylic.
- Michael adducts of acids eg, acrylic acid dimer, methacrylic acid dimer, acrylic acid trimer, methacrylic acid trimer, acrylic acid tetramer, methacrylic acid tetramer, etc.
- 2- (meth) acryloyloxyethyl dicarboxylic acid monoester eg, 2 -Acrylyloxyethyl succinic acid monoester, 2-methacryloyloxyethyl succinic acid monoester, 2-acryloyloxyethyl phthalic acid monoester, 2-methacryloyloxyethyl phthalic acid monoester, 2-acryloyloxyethyl Kisa hexahydrophthalic acid monoester, 2-methacryloyloxyethyl hexahydrophthalic acid mono ester) carboxyl group-containing unsaturated monomers such as, and the like.
- (meth) acrylic acid is used. 1 type, or 2 or
- Examples of the other copolymerizable monomer (a3) used as necessary include 2-hydroxyethyl acrylate, 2-hydroxypropyl acrylate, 3-chloro-2-hydroxypropyl acrylate, 2-hydroxyethyl.
- the carboxyl group-containing acrylic polymer (A) used in the present invention is the above-mentioned (meth) acrylic acid alkyl ester (a1), the carboxyl group-containing monomer (a2), and other copolymers as required. It can be obtained by copolymerizing the functional monomer (a3).
- the (meth) acrylic acid ester monomer (a1) is 75 to 95% by weight, particularly 80 to 93% by weight, more preferably 85 to 90%, based on the entire copolymer component. It is preferable to contain 1% by weight, particularly 1.5 to 8% by weight, more preferably 2 to 6% by weight of the carboxyl group-containing monomer (a2).
- (A3) is preferably contained in an amount of 5 to 15% by weight, particularly 6 to 14% by weight, more preferably 7 to 13% by weight.
- the carboxyl group-containing acrylic polymer (A) thus obtained preferably has a weight average molecular weight (Mw) of 100,000 or less, particularly 80,000 or less, more preferably 60,000 or less. . This is because if the weight average molecular weight (Mw) of the carboxyl group-containing acrylic polymer (A) is too large, the resin viscosity increases and the coating property tends to deteriorate.
- the lower limit of the weight average molecular weight (Mw) of the carboxyl group-containing acrylic polymer (A) is preferably 10,000 or more, particularly 20,000 or more, and more preferably 30,000 or more. This is because if the weight average molecular weight (Mw) of the carboxyl group-containing acrylic polymer (A) is too small, the cohesive force of the adhesive obtained by irradiation with active energy rays is insufficient and the adhesiveness tends to be lowered.
- the carboxyl group-containing acrylic polymer (A) can be produced by methods well known to those skilled in the art, such as solution radical polymerization, suspension polymerization, bulk polymerization, and emulsion polymerization. Among them, suspension polymerization is preferably used as a method for producing a carboxyl group-containing acrylic polymer (A) satisfying the above conditions because a polymer having a high degree of polymerization can be obtained and the resulting polymer can be easily isolated. . That is, the carboxyl group-containing acrylic polymer (A) is preferably a dry resin obtained by suspension polymerization.
- a polymerization initiator such as azobisisobutyronitrile can be added as necessary.
- the glass transition temperature (Tg) of the carboxyl group-containing acrylic polymer (A) is preferably ⁇ 60 to 20 ° C. or less, particularly ⁇ 60 to 0 ° C., more preferably ⁇ 55 to ⁇ It is preferable that it is 10 degrees C or less. This is because if the glass transition temperature (Tg) of the acrylic polymer (A) is too low, the cohesive force tends to be inferior, and conversely if too high, the adhesive tends to become brittle.
- the weight average molecular weight is a weight average molecular weight in terms of standard polystyrene molecular weight, and is a high performance liquid chromatography (manufactured by Waters, Japan, “Waters 2695 (main body)” and “Waters 2414 (detector)”).
- the glass transition temperature is calculated from the Fox equation.
- the content of the carboxyl group-containing acrylic polymer (A) is preferably 5 to 45 parts, more preferably 7 to 35 parts, and more preferably 100 parts by weight of the active energy ray-curable component (B) described later. It is preferably 10 to 25 parts. If the content of the carboxyl group-containing acrylic polymer (A) is too small, sufficient adhesiveness tends to be not obtained. Conversely, if the content is too large, the resulting composition for forming a pressure-bonded coating film of the present invention is sticky. This is because there is a tendency that the feeling becomes stronger, the glossiness is lowered, the adhesiveness is too strong at the time of peeling, and the paper breaks or the blocking resistance of the coated paper is insufficient.
- the active energy ray-curable component (B) is a component in which a curing reaction occurs due to active energy rays, and at least one of epoxy (meth) acrylate and urethane (meth) acrylate (b1), two or more ethylenically unsaturated groups.
- the ethylenically unsaturated compound (b2) other than (b1) having [b1] (hereinafter sometimes abbreviated as “polyfunctional compound (b2)”) and the ethylenically unsaturated compound other than (b1) having one ethylenically unsaturated group It is preferably at least one active energy ray-curable component selected from the group consisting of a saturated compound (b3) [hereinafter sometimes abbreviated as “monofunctional compound (b3)”].
- a saturated compound (b3) hereinafter sometimes abbreviated as “monofunctional compound (b3)”
- the polyfunctional compound (b2) and the monofunctional compound (b3) ) are preferably used in combination of two or more in terms of promoting the curing reaction. Moreover, it is more preferable that the content of the polyfunctional compound (b2) is larger than the content of the monofunctional compound (b3) because sufficient resin cohesion can be obtained.
- the components (b1) to (b3) will be described.
- epoxy (meth) acrylate can be cured at high speed even when the amount of ultraviolet rays is low, and when blended with epoxy (meth) acrylate, the mechanical properties of the product are excellent in fatigue resistance such as bending and impact during postcard products. This is because it tends to be excellent. That is, epoxy (meth) acrylate is excellent in fast curability and adhesive film toughness.
- the urethane (meth) acrylate has a flexible molecular skeleton, so it can give the product properties such as flexibility and high elasticity, and has a large tensile elongation as a mechanical property, such as bending and impact during postcard products. It is because it tends to be excellent in fatigue resistance.
- epoxy (meth) acrylate or urethane (meth) acrylate alone or in combination of two types of epoxy (meth) acrylate and urethane (meth) acrylate. It is preferred to use (meth) acrylate alone.
- Examples of the epoxy (meth) acrylate include diglycidyl ether di (meth) acrylate of bisphenol A, a reaction product of a polyfunctional epoxy compound, (meth) acrylic acid and methyltetrahydrophthalic anhydride, and a polyfunctional epoxy compound. And a reaction product of (meth) acrylic acid, glycerin polyglycidyl ether poly (meth) acrylate, and the like.
- a viscosity of 100 to 1,000,000 mPa ⁇ s / 25 ° C. is preferable, and 1,000 to 100,000 mPa ⁇ s / 25 ° C. is more preferable from the viewpoint of mechanical properties.
- urethane (meth) acrylate for example, a urethane (meth) acrylate having a (meth) acryloyl group at both ends connected to a polyoxyalkylene segment or a saturated polyester segment via a urethane bond, or the like.
- a viscosity of 100 to 100,000 mPa ⁇ s / 60 ° C. is preferable, and 1,000 to 10,000 mPa ⁇ s / 60 ° C. is more preferable from the viewpoint of mechanical properties.
- the viscosity means a viscosity measured using a B-type viscometer (product name: B-type viscometer; manufactured by Tokyo Keiki Co., Ltd.) under specific temperature conditions (for example, 25 ° C., 60 ° C., etc.).
- the ethylenically unsaturated compound [polyfunctional compound (b2)] other than (b1) having two ethylenically unsaturated groups is an active energy ray-curable component (used in the composition for forming a pressure-sensitive adhesive coating film of the present invention ( It is used as a copolymerizable compound constituting B) and is a polyfunctional compound having two or more ethylenically unsaturated groups.
- polyfunctional compound (b2) used in the present invention examples include polyfunctional (meth) acrylate monomers. Specifically, ethylene glycol di (meth) acrylate, diethylene glycol di (meth) acrylate, tetraethylene glycol di (meth) acrylate, polytetramethylene glycol di (meth) acrylate, polyethylene glycol di (meth) acrylate, propylene glycol di (Meth) acrylate, dipropylene glycol di (meth) acrylate, polypropylene glycol di (meth) acrylate, butylene glycol di (meth) acrylate, neopentyl glycol di (meth) acrylate, ethylene oxide modified bisphenol A type di (meth) acrylate , Propylene oxide modified bisphenol A di (meth) acrylate, 1,6-hexanediol di (meth) acrylate, glycerin di (meth) Bifunctional (meth) acrylic compounds such as acryl
- 1,6-hexanediol di (meth) acrylate and trimethylolpropane tri (meth) acrylate are preferably used. These are used singly or in combination of two or more, particularly preferably in combination of two or more.
- the ethylenically unsaturated compound (b3) [monofunctional compound (b3)] other than (b1) having one ethylenically unsaturated group is an active energy ray curing used in the composition for forming a pressure-sensitive adhesive coating film of the present invention.
- the monofunctional compound having one ethylenically unsaturated group is used as a copolymerizable compound constituting the functional component (B).
- Examples of the monofunctional compound (b3) include (meth) acrylic acid alkyl ester ( ⁇ -1) and other monofunctional compounds ( ⁇ -2). Use as a monomer mixture obtained by mixing them is effective. This is preferable.
- Examples of the (meth) acrylic acid alkyl ester ( ⁇ -1) include (meth) acrylic acid alkyl esters in which the alkyl group has 1 to 20, preferably 2 to 18, and more preferably 4 to 10 carbon atoms. It is done. Specifically, methyl (meth) acrylate, ethyl (meth) acrylate, n-propyl (meth) acrylate, n-butyl (meth) acrylate, iso-butyl (meth) acrylate, tert-butyl (meth) acrylate, n -Octyl (meth) acrylate, iso-octyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, nonyl (meth) acrylate, n-decyl (meth) acrylate, iso-decyl (meth) acrylate, etc.
- n-octyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, and n-butyl (meth) acrylate are preferably used in terms of effects.
- These (meth) acrylic acid alkyl esters ( ⁇ -1) are used singly or in combination.
- Examples of other monofunctional compounds ( ⁇ -2) include (meth) acrylic acid, crotonic acid, maleic acid, maleic anhydride, itaconic acid, fumaric acid, (meth) acrylamide-N-glycolic acid, and cinnamic acid.
- Michael adduct of (meth) acrylic acid for example, acrylic acid dimer, methacrylic acid dimer, acrylic acid trimer, methacrylic acid trimer, acrylic acid tetramer, methacrylic acid tetramer, etc.
- 2- (meth) acryloyloxyethyl dicarboxylic acid mono Esters eg, 2-acryloyloxyethyl succinic acid monoester, 2-methacryloyloxyethyl succinic acid monoester, 2-acryloyloxyethyl phthalic acid monoester, 2-methacryloyloxyethyl phthalic acid monoester, 2-acryloyloxyethyl Carboxyl group-containing unsaturated compounds such as oxahydrophthalic acid monoester and 2-methacryloyloxyethyl hexahydrophthalic acid monoester), 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acryl
- Allyl compounds such as alkoxy (poly) alkylene glycol mono (meth) acrylates, N- (meth) acrylamidomethyltrimethylammonium chloride, allyltrimethylammonium chloride, dimethylallyl vinyl ketone, N-vinylpyrrolidone, vinyl propionate, Vinyl-based monomers such as vinyl stearate, vinyl chloride, vinylidene chloride, vinyl acetate and styrene, ( ⁇ -1) such as phenol ethylene oxide modified (meth) acrylate Outside (meth) acrylic acid alkyl ester compound, etc. can be mentioned, one selected from these or two or more may be used.
- carboxyl group-containing unsaturated compounds preferably (meth) acrylic acid, crotonic acid, as other monofunctional compound ( ⁇ -2) in 100 parts of monofunctional compound (b3)
- the active energy ray-curable component (B) at least one of the epoxy (meth) acrylate and urethane (meth) acrylate (b1), the polyfunctional compound (b2), and the monofunctional compound (b3). It is preferably at least one selected from the group consisting of, and particularly preferably contains all three components (b1) to (b3).
- the content ratio of each component is 5 to 20% by weight of the component (b1) with respect to the whole active energy ray-curable component (B), particularly It is preferably 6 to 18% by weight, more preferably 7 to 16% by weight, and the component (b2) is 40 to 80% by weight, particularly 45 to 75% by weight, further 50 to 70% by weight, and (b3 ) Component is preferably set to 10 to 40% by weight, particularly 13 to 35% by weight, and more preferably 15 to 30% by weight.
- At least one of the epoxy (meth) acrylate and urethane (meth) acrylate (b1) imparts mechanical properties to the coating film, and is a component that affects the surface hardness and flexibility. Therefore, if the content ratio of the component (b1) is too small, the stickiness of the coating film becomes strong, the adhesiveness is too strong at the time of peeling, paper breakage occurs, and the blocking resistance of the coated paper is insufficient. On the contrary, if the amount is too large, the coating film surface hardness becomes too high, so that the coating film tends to crack when bent. Moreover, adhesiveness also falls and the tendency for appropriate adhesive strength not to be obtained is also seen.
- the polyfunctional compound (b2) is a component having a role as a crosslinking agent, such as improving the reinforcing property. For this reason, if the content ratio of the component (b2) is too small, the cohesive strength of the resin is insufficient, the sticky feeling becomes strong and the glossiness is lowered, or the adhesiveness is too strong at the time of peeling, resulting in paper breakage. On the contrary, if the amount is too large, the cohesive force of the resin is increased and the adhesiveness tends to be weakened.
- the monofunctional compound (b3) is an acrylic rubber dispersant, which is polymerized by irradiation with active energy rays such as ultraviolet rays to control the cohesive force and glass transition temperature (Tg) of the resin. It is an ingredient. For this reason, if the content ratio of the component (b3) is too small, the content ratio of the component (b1) or the component (b2) having the role of a crosslinking agent is relatively increased, so that the cohesive strength of the resin becomes too high. On the other hand, if the amount is too large, the cohesive strength of the resin is insufficient, and the smoothness of the coating film surface tends to be lost during peeling.
- the photopolymerization initiator (C) used in the present invention is not particularly limited as long as it generates radicals by the action of active energy rays such as light, and is an intramolecular self-cleavage photopolymerization initiator or hydrogen abstraction. A type of photoinitiator is used.
- Examples of the intramolecular self-cleaving type photopolymerization initiator include 4-phenoxydichloroacetophenone, 4-t-butyl-dichloroacetophenone, diethoxyacetophenone, 2-hydroxy-2-methyl-1-phenylpropane-1- ON, 1- (4-Isopropylenephenyl) -2-hydroxy-2-methylpropan-1-one, 1- (4-dodecylphenyl) -2-hydroxy-2-methylpropan-1-one, 4- ( 2-hydroxyethoxy) -phenyl (2-hydroxy-2-propyl) ketone, 1-hydroxy-cyclohexyl-phenyl-ketone, 2-methyl-1- (4-methylthiophenyl) -2-morpholinopropan-1-one, Benzoin, benzoin methyl ether, benzoin ethyl ether, benzoin isopropyl Ether, benzoin isobutyl ether, benzyldimethyl ketal, ⁇ -
- Examples of the hydrogen abstraction type photopolymerization initiator include benzophenone, benzoylbenzoic acid, methyl benzoylbenzoate, 4-phenylbenzophenone, hydroxybenzophenone, 3,3′-dimethyl-4-methoxybenzophenone, 2,4 , 6-trimethylbenzophenone, 4-methylbenzophenone, thioxanthone, 2-chlorothioxanthone, 2-methylthioxanthone, 2,4-dimethylthioxanthone, isopropylthioxanthone, camphorquinone, dibenzosuberone, 2-ethyl Anthraquinone, 3,3 ′, 4,4′-tetra (t-butylperoxycarbonyl) benzophenone, benzyldimethyl ketal, 9,10-phenanthrenequinone, and the like.
- benzophenone, methylbenzophenone, 2,4 6- trimethyl benzophenone are preferred.
- triethanolamine, triisopropanolamine, 4,4'-dimethylaminobenzophenone (Michler ketone), 4,4'-diethylaminobenzophenone, 2-dimethylamino can be used as an auxiliary for the photopolymerization initiator (C).
- Ethylbenzoic acid ethyl 4-dimethylaminobenzoate, ethyl 4-dimethylaminobenzoate (n-butoxy), isoamyl 4-dimethylaminobenzoate, 2-dimethylhexyl 4-dimethylaminobenzoate, 2,4-diethylthio It is also effective to use xanthone, 2,4-diisopropylthioxanthone and the like together.
- the content of the photopolymerization initiator (C) is 10 to 30 parts, preferably 13 to 27 parts, particularly 16 to 25 parts with respect to 100 parts of the active energy ray-curable component (B). It is preferable. If the content of the photopolymerization initiator is less than the above lower limit value, the polymerization is likely to vary. Conversely, if the content exceeds the above upper limit value, the adhesiveness does not occur and it is not suitable for practical use.
- Tackifiers such as group petroleum resins, styrene resins, xylene resins, polymerization inhibitors, viscosity modifiers, leveling agents, waxes, antifoaming agents, anti-aging agents, stabilizers, colorants, fine particle fillers And the like, and compounds that cause coloration or discoloration by irradiation with ultraviolet rays or radiation can be added.
- the active energy ray-curable pressure-sensitive adhesive coating film forming composition of the present invention can be obtained.
- composition for forming active energy ray-curable pressure-sensitive adhesive coating film is substantially free of water, an aqueous solvent or an organic solvent, and contains a carboxyl group-containing acrylic polymer (A) and a photopolymerization initiator (C Further, other components added as required are dissolved or uniformly dispersed in the active energy ray-curable component (B).
- Such a composition for forming an active energy ray-curable pressure-bonded coating film includes a carboxyl group-containing acrylic polymer (A), an active energy ray-curable component (B), a photopolymerization initiator (C), and, if necessary, added.
- Other components to be prepared can be prepared by heating and mixing at room temperature (about 25 ° C. ⁇ 10), and in some cases, from room temperature to 60 ° C.
- the viscosity of the resulting active energy ray-curable pressure-sensitive adhesive coating film forming composition is preferably 100 to 500 mPa ⁇ s / 25 ° C. If the viscosity is too high, it tends to be difficult to apply uniformly, and conversely, if it is too low, the coating suitability deteriorates and it tends to be difficult to obtain a uniform coating film. Because.
- the obtained active energy ray-curable pressure-sensitive adhesive film-forming composition is formed on a whole surface or a predetermined portion of a base paper such as a printing sheet or postcard paper, and a gravure coater, flexo coater, air knife coater, bar coater.
- a base paper such as a printing sheet or postcard paper
- a gravure coater, flexo coater, air knife coater, bar coater By applying an active energy ray to this, an adhesive layer that is appropriately cured is obtained.
- attachment which has peelability is attained by superposing
- Examples of the base paper to be coated with the coating film forming composition of the present invention include high-quality paper, medium-quality paper, rough paper, cotton paper, art paper, coated paper, lightweight coated paper, and plastic laminate. Examples thereof include paper, cloth, plastic laminate cloth, plastic film, and metal foil.
- active energy ray in addition to electromagnetic waves such as far ultraviolet rays, ultraviolet rays, near ultraviolet rays, infrared rays, electromagnetic waves such as X-rays and ⁇ rays, electron beams, proton rays, neutron rays, etc. can be used. Curing by ultraviolet irradiation is advantageous because of the availability of the irradiation device and the price.
- a high-pressure mercury lamp, ultrahigh-pressure mercury lamp, carbon arc lamp, metal halide lamp, xenon lamp, chemical lamp, electrodeless discharge lamp, or the like that emits light in the wavelength range of 150 to 450 nm can be used.
- the exposure dose of the actinic energy ray is preferably at 500 mJ / cm 2 or more, particularly 1000 mJ / cm 2 or more, and further preferably not 1500 mJ / cm 2 or more.
- This irradiation amount is too low, there is a tendency that the polymerization by active energy ray irradiation tends to vary.
- the upper limit of the irradiation dose is usually 10,000 mJ / cm 2 . This is because if the irradiation amount is too large, there is a tendency that it is not practical due to the relationship between the apparatus and the cost.
- the thickness of the adhesive layer obtained by coating is not limited in general because requirements vary depending on the application, but is preferably 5 to 200 ⁇ m, more preferably 10 to 150 ⁇ m. This is because if the thickness of the adhesive layer is too thin, the adhesive properties tend to be difficult to stabilize, and conversely, if it is too thick, adhesive residue tends to occur.
- the reaction product was filtered and washed with a filter cloth having a mesh size of 10 ⁇ m and dried with a circulating hot air dryer at 50 ° C. to obtain a carboxyl group-containing acrylic polymer (component A).
- the resulting carboxyl group-containing acrylic polymer had a weight average molecular weight (Mw) of 80,000 and a glass transition temperature of ⁇ 50 ° C.
- the reaction product was dried at 70 ° C. for 12 hours using a dryer to obtain an acrylic polymer for a comparative example containing no carboxyl group.
- the resulting acrylic polymer had a weight average molecular weight (Mw) of 400,000 and a glass transition temperature of ⁇ 40 ° C.
- each active energy ray-curable pressure-sensitive coating film-forming composition was produced according to the following examples and comparative examples.
- Example 1 13 parts of the carboxyl group-containing acrylic polymer obtained in Production Example 1, 13 parts of epoxy acrylate (trade name: “CN-116”; manufactured by Sartomer) as component (b1), and trimethylolpropane as the polyfunctional compound (b2) 22 parts of triacrylate, 40 parts of 1,6-hexanediol diacrylate, 11 parts of n-butyl acrylate as monofunctional compound (b3), 2-hydroxy-3-phenoxypropyl acrylate (trade name: “Aronix M-5700”; 14 parts of Toa Gosei Co., Ltd. was placed in a container equipped with a stirrer and stirred and mixed for 24 hours to dissolve. The viscosity of this solution was 150 mPa ⁇ s / 25 ° C.
- Example 2 14 parts of the carboxyl group-containing acrylic polymer obtained in Production Example 1, 26 parts of trimethylolpropane triacrylate as the polyfunctional compound (b2), 43 parts of 1,6-hexanediol diacrylate, and n as the monofunctional compound (b3) -Active energy ray-curable type in the same manner as in Example 1 except that 14 parts of butyl acrylate and 17 parts of 2-hydroxy-3-phenoxypropyl acrylate (trade name: “Aronix M-5700”; manufactured by Toagosei Co., Ltd.) are used. A composition for forming a pressure-bonded coating film was obtained.
- Example 3 14 parts of a carboxyl group-containing acrylic polymer obtained in Production Example 1, 14 parts of epoxy acrylate (trade name: “CN-116”; manufactured by Sartomer) as component (b1), 63 parts of 1,6-hexanediol diacrylate Example 1 except that 10 parts of n-butyl acrylate and 13 parts of 2-hydroxy-3-phenoxypropyl acrylate (trade name: “Aronix M-5700”; manufactured by Toagosei Co., Ltd.) were used as the monofunctional compound (b3).
- an active energy ray-curable pressure-sensitive adhesive coating film-forming composition was obtained.
- Example 1 Active energy ray curing is carried out in the same manner as in Example 1 except that the photopolymerization initiator is 6 parts of 1-hydroxy-cyclohexyl-phenyl-ketone (trade name “Irgacure 184”; manufactured by Ciba Specialty Chemicals). A composition for forming a pressure-bonded coating film was obtained.
- Example 2 Example 1 except that the photopolymerization initiator was 6 parts of 2-hydroxy-2-methyl-phenyl-propan-1-one (trade name “D-1173”; manufactured by Ciba Specialty Chemicals). Thus, an active energy ray-curable pressure-sensitive adhesive film-forming composition was obtained.
- Example 4 An active energy ray-curable pressure-sensitive adhesive film-forming composition was obtained in the same manner as in Example 1, except that the acrylic polymer for Comparative Example obtained in Production Example 2 was used. In addition, the viscosity of the solution before adding a photoinitiator was 1300 mPa * s / 25 degreeC.
- Table 1 below shows the blending ratios of the above component materials used in Examples and Comparative Examples.
- a peelable adhesive-processed paper was produced by the following method. Coated paper weighing 110g / m 2, coating the obtained active energy ray-curable obtained in Examples and Comparative Examples at a rate of 7 g / m 2 crimp coating forming composition by a wire bar, to ultraviolet radiation An adhesive layer was formed by curing to obtain each peelable adhesive processed paper.
- the ultraviolet irradiation conditions are a high-pressure mercury lamp, an irradiation intensity of about 200 W / m 2 , an integrated illuminance of 60 mJ / m 2 , and a lamp height of 18 cm.
- ⁇ Curing property> The stickiness and hardness of the coated surface of the peelable adhesive processed paper were confirmed, and the cured state of the adhesive layer was determined according to the following criteria. ⁇ : There is no stickiness and the curing is sufficiently completed. (Triangle
- the peelable adhesive-treated paper is cut into a width of 25 mm and a length of 100 mm, and the coated surfaces are combined with each other in two layers, and are pressure-bonded using a laminator with a pressure of 0.2 MPa, and a sample having a width of 25 mm ( Pressure temporary adhesive paper).
- the adhesiveness was evaluated using each pressure temporary adhesive paper obtained above.
- peelability was evaluated by the following method using the pressure temporary adhesive paper.
- a T type A peel test was performed.
- X Adhered, and if it is peeled off, the paper is torn. -: Not determined from the beginning because it is not bonded.
- Table 2 below shows the evaluation results of the coating property, curability, adhesiveness, and peelability obtained above.
- Example 2 the peelable adhesive processed paper obtained in Example 1 was excellent in coatability, curability, adhesiveness, peelability, and highly practical.
- Example 2 both the epoxy (meth) acrylate and the urethane (meth) acrylate, which are the components (b1), are not blended.
- Example 3 only one kind of the polyfunctional compound (b2) is blended.
- the coating property and curability were good
- Example 3 the coating property and adhesiveness were good, and other physical properties such as peelability were practical.
- the drying process at the time of coating was unnecessary, and the surface gloss which was excellent in the printing surface was seen.
- Comparative Examples 1 to 3 which are general photopolymerization initiator contents, were not sufficiently adhesive due to poor curing. Moreover, since the comparative example 4 using the acrylic polymer which does not contain a carboxyl group has bad mixability of the composition for pressure-bonding coating film formation, is inferior in coating property, and adhesiveness is too high, if it tries to peel off The paper was torn.
- composition for forming an active energy ray-curable pressure-bonded coating film of the present invention is used as an adhesive used in a postcard system having a confidentiality instead of a sealed letter for the purpose of reducing postage costs, printing information and automating the creation of a notice. It is useful and can also be used as a double-sided tape or an adhesive tape by coating on a base material sheet such as a nonwoven fabric or a foam base material.
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Abstract
Description
すなわち、本発明者らは上記事情に鑑み鋭意検討を重ね、良好な塗工と硬化性を有し、剥離性接着力に優れる接着性組成物を得るため、アクリル系ポリマー(A)と、活性エネルギー線硬化性成分(B)と、光重合開始剤(C)の成分を中心に研究を行った。その結果、上記アクリル性ポリマーにカルボキシル基を含有させるとともに、上記光重合開始剤を、その硬化成分との関係で、従来よりも多い特定の割合に設定することにより、良好な塗工性と硬化性を両立させ、剥離性に優れる良好な接着力を有する活性エネルギー線硬化型圧着塗膜形成用組成物が得られることを見出し、本発明を完成した。一般に、上記光重合開始剤を増加させすぎると硬化物が低分子量になるため、含有量を抑える傾向にあるところ、光重合開始剤を従来公知の含有量より多く設定するとともに、アクリル系ポリマーにカルボキシル基を含有させることにより、優れた剥離性接着加工紙用の接着性組成物が得られることを見出したものである。
(b1)エポキシ(メタ)アクリレート及びウレタン(メタ)アクリレートの少なくとも一方。
(b2)エチレン性不飽和基を2個以上有する(b1)以外のエチレン性不飽和化合物。
(b3)エチレン性不飽和基を1個有する(b1)以外のエチレン性不飽和化合物。
まず、カルボキシル基含有アクリル系ポリマー(A)について説明する。
本発明で用いられるカルボキシル基含有アクリル系ポリマー(A)は、(メタ)アクリル酸アルキルエステル(a1)、カルボキシル基含有モノマー(a2)を共重合させてなるものであり、必要に応じて更にその他の共重合性モノマー(a3)を共重合してもよい。
活性エネルギー線硬化性成分(B)は、活性エネルギー線により硬化反応が生じる成分であり、エポキシ(メタ)アクリレート及びウレタン(メタ)アクリレートの少なくとも一方(b1)、エチレン性不飽和基を2個以上有する(b1)以外のエチレン性不飽和化合物(b2)〔以下、「多官能化合物(b2)」と略すことがある〕、およびエチレン性不飽和基を1個有する(b1)以外のエチレン性不飽和化合物(b3)〔以下、「単官能化合物(b3)」と略すことがある〕からなる群から選ばれる少なくとも一種の活性エネルギー線硬化性成分であることが好ましい。特に、上記(b1)~(b3)の3成分全てを含有することが接着力に優れるとともに剥離時の剥離性が良好な点で好ましく、さらに上記多官能化合物(b2)および単官能化合物(b3)は、それぞれ2種以上併用することが硬化反応促進の点で好ましい。また、多官能化合物(b2)の含有量は、単官能化合物(b3)の含有量より多いことが充分な樹脂凝集力を得ることができる点でより好ましい。
つぎに、上記(b1)~(b3)成分について説明する。
本発明においては、活性エネルギー線硬化性成分(B)の構成化合物として、エポキシ(メタ)アクリレート及びウレタン(メタ)アクリレートの少なくとも一方(b1)を含有することが好ましい。
上記エチレン性不飽和基を2個有する(b1)以外のエチレン性不飽和化合物〔多官能化合物(b2)〕は、本発明の圧着塗膜形成用組成物に用いられる活性エネルギー線硬化性成分(B)を構成する共重合性化合物として用いられているものであり、エチレン性不飽和基を2個以上有する多官能の化合物である。
上記エチレン性不飽和基を1個有する(b1)以外のエチレン性不飽和化合物(b3)〔単官能化合物(b3)〕は、本発明の圧着塗膜形成用組成物に用いられる活性エネルギー線硬化性成分(B)を構成する共重合性化合物として用いられるものであり、エチレン性不飽和基を1個有する単官能の化合物である。単官能化合物(b3)としては、(メタ)アクリル酸アルキルエステル(β-1)や、その他の単官能化合物(β-2)があげられ、これを混合してなるモノマー混合物として用いることが効果の点で好ましい。
本発明で用いられる光重合開始剤(C)としては、光等の活性エネルギー線の作用によりラジカルを発生するものであれば特に限定されず、分子内自己開裂型の光重合開始剤や水素引抜型の光重合開始剤が用いられる。
これら光重合開始剤(C)は1種又は2種以上併用して用いられる。
また、本発明では本発明の効果を損なわない範囲において、他の粘着剤、ウレタン樹脂、ロジン、ロジンエステル、水添ロジンエステル、フェノール樹脂、芳香族変性テルペン樹脂、脂肪族系石油樹脂、脂環族系石油樹脂、スチレン系樹脂、キシレン系樹脂等の粘着付与剤、また、重合禁止剤、粘度調製剤、レベリング剤、ワックス、消泡剤、老化防止剤、安定剤、着色剤、微粒子充填剤等の公知の添加剤や、紫外線あるいは放射線照射により呈色あるいは変色を起こすような化合物を添加することができる。
本発明の活性エネルギー線硬化型圧着塗膜形成用組成物は、水、水性溶媒あるいは有機溶媒を実質的に含有しておらず、カルボキシル基含有アクリル系ポリマー(A)および光重合開始剤(C)さらに必要に応じ添加される他の成分は、活性エネルギー線硬化性成分(B)中に、溶解もしくは均一に分散した状態となる。このような活性エネルギー線硬化型圧着塗膜形成用組成物は、カルボキシル基含有アクリル系ポリマー(A)、活性エネルギー線硬化性成分(B)、光重合開始剤(C)、さらに必要に応じ添加される他の成分を、常温(約25℃±10)で、場合によっては常温~60℃の温度範囲に加温して混合することにより調製することができる。
上記において、活性エネルギー線としては、遠紫外線,紫外線,近紫外線,赤外線等の光線、X線,γ線等の電磁波の他、電子線、プロトン線、中性子線等が利用できるが、硬化速度、照射装置の入手のし易さ、価格等から紫外線照射による硬化が有利である。
なお、例中「部」、「%」とあるのは、断りのない限り重量基準を意味する。
〔製造例1:A成分(実施例用)〕
撹拌機、温度計、コンデンサーを備えた重合装置に、脱イオン水250部を入れ撹拌し、分散安定剤としてポリビニルアルコール0.6部を加え溶解させた。その後、これを撹拌しつつ、アクリル酸2.5部、アクリロニトリル10部、n-ブチルアクリレート77.5部、メチルメタクリレート10部、n-ドデシルメルカプタン0.5部と、重合開始剤としてアゾビスイソブチロニトリル0.4部を添加した。ついで、内容物を75℃に昇温させ、反応温度75℃を維持して3時間反応させた。その後、90℃に昇温させ、この温度を1時間維持して反応を終了させた。そして、この反応物を、10μm目開の濾布にて濾過洗浄し、50℃の循環熱風乾燥機で乾燥し、カルボキシル基含有アクリル系ポリマー(A成分)を得た。
得られたカルボキシル基含有アクリル系ポリマーの重量平均分子量(Mw)は8万であり、ガラス転移温度は-50℃であった。
4ツ口丸底フラスコに還流冷却器、撹拌器、滴下ロートおよび温度計をとりつけ、n-ブチルアクリレート88部、アクリロニトリル7部、2-ヒドロキシエチルメタクリレート5部、および酢酸エチル80部を仕込み、加熱還流開始後、重合開始剤としてアゾビスイソブチロニトリル0.06部を加え、酢酸エチル還流温度で2時間反応後、アゾビスイソブチロニトリル0.07部をトルエン5部に溶解させたものを加え、還流温度にて更に5時間反応させた。その後、この反応物を乾燥機を用いて70℃で12時間乾燥し、カルボキシル基を含有しない比較例用のアクリル系ポリマ-を得た。
得られたアクリル系ポリマ-の重量平均分子量(Mw)は40万であり、ガラス転移温度は-40℃であった。
製造例1で得られたカルボキシル基含有アクリル系ポリマー13部、(b1)成分としてエポキシアクリレート(商品名:「CN-116」;サートマー社製)13部、多官能化合物(b2)としてトリメチロールプロパントリアクリレート22部、1,6-ヘキサンジオールジアクリレート40部、単官能化合物(b3)としてn-ブチルアクリレート11部、2-ヒドロキシ-3-フェノキシプロピルアクリレート(商品名:「アロニックスM-5700」;東亜合成社製)14部を攪拌機のついた容器に入れ、24時間攪拌混合し溶解した。この溶液の粘度は150mPa・s/25℃であった。
製造例1で得られたカルボキシル基含有アクリル系ポリマー14部、多官能化合物(b2)としてトリメチロールプロパントリアクリレート26部、1,6-ヘキサンジオールジアクリレート43部、単官能化合物(b3)としてn-ブチルアクリレート14部、2-ヒドロキシ-3-フェノキシプロピルアクリレート(商品名:「アロニックスM-5700」;東亜合成社製)17部にした以外は、実施例1と同様にして活性エネルギー線硬化型圧着塗膜形成用組成物を得た。
製造例1で得られたカルボキシル基含有アクリル系ポリマー14部、(b1)成分としてエポキシアクリレート(商品名:「CN-116」;サートマー社製)14部、1,6-ヘキサンジオールジアクリレート63部、単官能化合物(b3)としてn-ブチルアクリレート10部、2-ヒドロキシ-3-フェノキシプロピルアクリレート(商品名:「アロニックスM-5700」;東亜合成社製)13部にした以外は、実施例1と同様にして、活性エネルギー線硬化型圧着塗膜形成用組成物を得た。
光重合開始剤を、1-ヒドロキシ-シクロヘキシル-フェニル-ケトン(商品名「イルガキュア184」;チバ・スペシャルティ・ケミカルズ社製)6部にした以外は、実施例1と同様にして、活性エネルギー線硬化型圧着塗膜形成用組成物を得た。
光重合開始剤を、2-ヒドロキシ-2-メチル-フェニル-プロパン-1-オン(商品名「D-1173」;チバ・スペシャルティ・ケミカルズ社製)6部にした以外は、実施例1と同様にして、活性エネルギー線硬化型圧着塗膜形成用組成物を得た。
光重合開始剤を、2-メチル-1-(4-メチルチオフェニル)-2-モルフォリノプロパン-1-オン(商品名:「イルガキュア907」;チバ・スペシャルティ・ケミカルズ社製)6部にした以外は、実施例1と同様にして、活性エネルギー線硬化型圧着塗膜形成用組成物を得た。
製造例2で得られた比較例用のアクリル系ポリマーを用いた以外は、実施例1と同様にして、活性エネルギー線硬化型圧着塗膜形成用組成物を得た。なお、光重合開始剤を添加する前の溶液の粘度は1300mPa・s/25℃であった。
秤量110g/m2のコート紙に、ワイヤーバーにより7g/m2の割合で各実施例および比較例で得られた活性エネルギー線硬化型圧着塗膜形成用組成物を塗工し、紫外線照射による硬化によって接着層を形成させ、各剥離性接着加工紙を得た。紫外線照射条件は、高圧水銀ランプを用い、照射強度約200W/m2、積算照度60mJ/m2、ランプ高さ18cmである。
剥離性接着加工紙の塗工面を観察し、その塗工状態を下記の基準で判定した。
○:全面に均一に塗工され、光沢がある。
△:僅かに塗工面に乱れが見られるが実用上問題ない。
×:組成物の混合性が悪く、もしくは高粘度のため、塗工面に乱れ、隙間等が散見される。
剥離性接着加工紙の塗工面のべたつき、硬さ等を確認し、その接着層の硬化状態を下記の基準で判定した。
○:べたつきなく、充分に硬化が完了している。
△:ほとんど硬化しているが、若干のべたつき部分がある。
×:べたつきが多く、軽く引っ掻くと剥がれ、硬化不良状態である。
加圧仮接着紙を折り曲げ、接着面の剥がれ、浮き等の接着不良の有無を確認し、その接着状態を下記の基準で判定した。
◎:完全に接着しており、折り曲げても接着箇所の剥がれは生じない。
○:ほぼ接着しており、本発明の用途には充分使用可能である。
△:一応接着はするが、弱く、紙質により、折り曲げれば接着面に浮き離れが生じる場合がある。
×:接着が弱いか、全く接着しない。
〈剥離性〉
上記T型剥離試験の際の剥離状態を下記の基準で判定した。
○:紙破れなく剥がれる。
△:紙破れなく剥がれるが、剥離強度が強く、紙質により、表面の塗膜面に割れ筋が入る場合がある。
×:接着してしまい、剥がそうとすれば、紙が破れる。
-:最初から未接着のため判定不能。
Claims (7)
- カルボキシル基含有アクリル系ポリマー(A)、活性エネルギー線硬化性成分(B)、光重合開始剤(C)を含有してなる活性エネルギー線硬化型圧着塗膜形成用組成物であって、上記光重合開始剤(C)の含有量が、上記活性エネルギー線硬化性成分(B)100重量部に対して10~30重量部であることを特徴とする活性エネルギー線硬化型圧着塗膜形成用組成物。
- カルボキシル基含有アクリル系ポリマー(A)の重量平均分子量が、10万以下であることを特徴とする請求項1記載の活性エネルギー線硬化型圧着塗膜形成用組成物。
- カルボキシル基含有アクリル系ポリマー(A)のガラス転移温度が、-60~20℃の範囲であることを特徴とする請求項1または2記載の活性エネルギー線硬化型圧着塗膜形成用組成物。
- カルボキシル基含有アクリル系ポリマー(A)の含有割合が、上記活性エネルギー線硬化性成分(B)100重量部に対して5~45重量部であることを特徴とする請求項1~3のいずれか一項に記載の活性エネルギー線硬化型圧着塗膜形成用組成物。
- 活性エネルギー線硬化性成分(B)が、下記の(b1)~(b3)を含有することを特徴とする請求項1~4のいずれか一項に記載の活性エネルギー線硬化型圧着塗膜形成用組成物。
(b1)エポキシ(メタ)アクリレート及びウレタン(メタ)アクリレートの少なくとも一方。
(b2)エチレン性不飽和基を2個以上有する(b1)以外のエチレン性不飽和化合物。
(b3)エチレン性不飽和基を1個有する(b1)以外のエチレン性不飽和化合物。 - (b1)~(b3)の含有割合が、上記活性エネルギー線硬化性成分(B)全体に対して、(b1)が5~20重量%、(b2)が40~80重量%、(b3)が10~40重量%であることを特徴とする請求項5記載の活性エネルギー線硬化型圧着塗膜形成用組成物。
- 請求項1~6のいずれか一項に記載の活性エネルギー線硬化型圧着塗膜形成用組成物が紙表面に塗工され、活性エネルギー線で硬化されていることを特徴とする剥離性接着加工紙。
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CN200880115150XA CN101855310B (zh) | 2007-12-28 | 2008-12-22 | 活性能量射线固化型压敏粘合涂膜形成用组合物及使用该组合物的剥离性粘合加工纸 |
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CN111548751A (zh) * | 2019-02-12 | 2020-08-18 | 日东电工株式会社 | 增强薄膜、装置的制造方法以及增强方法 |
JP2021091909A (ja) * | 2016-04-20 | 2021-06-17 | 東洋インキScホールディングス株式会社 | 活性エネルギー線重合性接着剤および積層体 |
US11613677B2 (en) | 2017-12-15 | 2023-03-28 | Lg Chem, Ltd. | Water-based acrylic pressure-sensitive adhesive for clothing, and preparation method thereof |
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JP5344038B2 (ja) * | 2009-07-08 | 2013-11-20 | 東亞合成株式会社 | 厚塗り用塗料組成物 |
JP6051662B2 (ja) * | 2012-08-03 | 2016-12-27 | 日立化成株式会社 | 回路接続用接着剤組成物、接着シート、接着剤リール及び回路部材の接続構造体 |
JP6062806B2 (ja) * | 2013-05-31 | 2017-01-18 | 昭和電工株式会社 | ガラスエッチング向け再剥離保護テープ用活性線硬化型粘着剤組成物、ガラスエッチング向け再剥離保護テープ |
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JP7070733B2 (ja) | 2016-04-20 | 2022-05-18 | 東洋インキScホールディングス株式会社 | 活性エネルギー線重合性接着剤および積層体 |
JP2022093410A (ja) * | 2016-04-20 | 2022-06-23 | 東洋インキScホールディングス株式会社 | 活性エネルギー線重合性接着剤および積層体 |
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CN111548751A (zh) * | 2019-02-12 | 2020-08-18 | 日东电工株式会社 | 增强薄膜、装置的制造方法以及增强方法 |
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CN101855310B (zh) | 2013-08-07 |
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JP2009161603A (ja) | 2009-07-23 |
JP5528669B2 (ja) | 2014-06-25 |
KR101530400B1 (ko) | 2015-06-19 |
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