Patent ID: 9663685
Date: 2017-05-30
CPC Classifications: C08F,C08L,C09J,G03F

Claim:
1. A photocurable adhesive composition, said adhesive composition comprises, based on 100 parts by weight of the adhesive composition: component A: from 70 to 99 parts by weight of one or more polymers carrying a (meth)acryloxyl group; component B: from 0.1 to 20 parts by weight of one or more (meth)acrylates monomers; component C: from 0.5 to 10 parts by weight of at least one UV photoinitiator; and component D: from 0.01 to 5 parts by weight of antioxidant; wherein said polymers carrying a (meth)acryloxyl groups of component A are selected from polybutadiene carrying a (meth)acryloxyl group, polyisoprene carrying a (meth)acryloxyl group, butadiene-styrene copolymer carrying a (meth)acryloxyl group, polyisobutylene carrying a (meth)acryloxyl group, butyl rubber carrying a (meth)acryloxyl group, bromoisobutylene-isoprene copolymer carrying a (meth)acryloxyl group, chloroiso butylene-isoprene copolymer carrying a (meth)acryloxyl group, and combinations thereof and have a Tg value of from −100° C. to 20° C., and an average functionality of the (meth)acryloxyl group of more than 0 and ≦3; wherein said UV photoinitiator is selected from the group consisting of 2,2-dimethoxy-1,2-diphenylethan-1-one, trimethylbenzoyl diphenylphosphine oxide, 1-hydroxycyclohexyl benzophenone, 2-methyl-1-[4-(methylthio)phenyl]-2-morpholinopropan-1-one, ethyl-2,4,6-trimethylbenzoylphenylphosphinate, and combinations thereof, and wherein the hardness of the cured adhesive composition when cured by exposure to radiation at one or more energy levels, determined according to ASTM D2240 is from sh00 30 to sh00 70, and wherein the cured adhesive composition can withstand processing temperatures of 160° C. to 260° C.