An adhesive composition comprising (A) a copolymer of a (meth)acrylic ester having a Mw of 500,000 to 200,000 and (B) a crosslinking agent comprising an adduct of a polyisocyante comprising (a) isocyanate difunctional adducts of a diisocyanate with a diol (b) adducts of a diisocyanate with a polyhyd
An adhesive composition comprising (A) a copolymer of a (meth)acrylic ester having a Mw of 500,000 to 200,000 and (B) a crosslinking agent comprising an adduct of a polyisocyante comprising (a) isocyanate difunctional adducts of a diisocyanate with a diol (b) adducts of a diisocyanate with a polyhydric alcohol, having an isocyanate functionality of three or greater, in a weight ratio of the amounts of (a) to (b) of 95:5 to 10:90. An adhesive sheet and an adhesive optical component comprising a layer of the adhesive composition. The adhesive composition exhibits excellent adhesion with adherents, and stress relaxation and follows changes in the dimensions of substrates.
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1. An adhesive composition which is the crosslinked product of components which comprise: (A) a copolymer of a (meth)acrylic ester having a weight-average molecular weight of 500,000 to 2,000,000, said weight-average molecular weight being the weight-average molecular weight of a corresponding Po
1. An adhesive composition which is the crosslinked product of components which comprise: (A) a copolymer of a (meth)acrylic ester having a weight-average molecular weight of 500,000 to 2,000,000, said weight-average molecular weight being the weight-average molecular weight of a corresponding Polystyrene obtained in accordance with gel permeation chromatography and (B) a crosslinking agent comprising an adduct of a polyisocyanate compound which comprises (a) isocyanate difunctional adducts of a diisocyanate compound with a diol and (b) adducts of a diisocyanate compound with a polyhydric alcohol, and having an isocyanate functionality of three or greater, in amounts such that a ratio of the amounts by weight of the difunctional adducts (a) and the adducts (b) is 95:5 to 10:90, wherein the copolymer (A) contains portions capable of reacting with the crosslinking agent (B), and wherein said crosslinking agent (B) is in an amount of 0.001 to 50 parts by weight per 100 parts by weight of said copolymer (A), wherein the diisocyanate compound which forms the adducts (a) or the adducts (b) is selected from the group consisting of tolylene diisocyanate, diphenylmethane diisocyanate, xylylene diisocyanate, hexamethylene diisocyanate, isophorone diisocyanate and hydrogenated diphenylmethane diisocyanate; the dial which forms adducts (a) is selected from the group consisting of ethylene glycol, 1,3-propanediol, 1,4-butanediol, 1,6-hexanediol, polyethylene glycol, polypropylene glycol and polytetramethylene glycol; the polyhydric alcohol which forms the adducts (b) is selected from the group consisting of glycerol, trimethylolpropane, trimethylolethane, pentaerythritol and dimers thereof. 2. An adhesive composition according to claim 1, wherein the component (B) is in an amount of 0.01 to 10 parts by weight per 100 parts by weight of the component (A). 3. An adhesive composition according to claim 1, wherein the copolymer of component (A) comprises a copolymer of (meth)acrylic ester in which the alkyl group in the ester portion has 1 to 20 carbon atoms and a monomer having a functional group having an active hydrogen. 4. An adhesive composition according to claim 3, wherein the (meth)acrylic ester comprises at least one member selected from the group consisting of methyl (meth)acrylate, ethyl (meth)acrylate, propyl (meth)acrylate, butyl (meth)acrylate, pentyl (meth)acrylate, hexyl (meth)acrylate, cyclohexyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, isooctyl (meth)acrylate, decyl (meth)acrylate, dodecyl (meth)acrylate, myristyl (meth)acrylate, palmityl (meth)acrylate and stearyl (meth)acrylate; and the monomer having a functional group having an active hydrogen comprises at least one member selected from the group consisting of 2-hydroxyethyl (meth)acrylate, 2-hydroxypropyl (meth) acrylate, 3-hydroxypropyl (meth) acrylate, 2-hydroxybutyl (meth) acrylate, 3-hydroxybutyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate, acrylamide, methacrylamide, N-methylacrylamide, N-methylmethacrylamide, N-methylolacrylamide, N-methylolmethacrylamide, monomethylaminoethyl (meth) acrylate, monoethylaminoethyl (meth) acrylate, monomethylaminopropyl (meth) acrylate, monoethyl-aminopropyl (meth) acrylate, acrylic acid, methacrylic acid, crotonic acid, maleic acid, itaconic acid and citraconic acid. 5. An adhesive composition according to claim 4, wherein the weight average molecular weight of the copolymer of component (A) is 800,000 to 1,800,000. 6. An adhesive composition according to claim 4, wherein the copolymer of component (A) is a copolymer of butyl acrylate, methyl acrylate and hydroxyethyl acrylate. 7. An adhesive composition according to claim 1, wherein said composition does not include a plasticizer.
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이 특허에 인용된 특허 (3)
Scopazzi Christopher ; Lewin Laura A. ; Kincaid Samuel J., Coating composition containing an amine functional dispersed polymer and an isocyanate curing agent.
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