Thermoplastic hot melt adhesive

Details Thermoplastic hot melt adhesive Thermoplastic hot melt adhesive

C - Chemistry, Metallurgy

09

J

C09J 153/02 (2006.01) C09J 123/22 (2006.01) C09J 161/06 (2006.01) C09J 191/06 (2006.01) C09J 201/00 (2006.01)

Patent

CA 2080313

K-18809/A/CGC 1578 THERMOPLASTIC HOT MELT ADHESIVE Abstract of the Disclosure The present invention relates to a thermoplastic hot melt adhesive comprising (a) a block copolymer, said block copolymer being prepared utilizing a bromide based coupling agent, said block copolymer comprising at least two monoalkenyl arene polymer end blocks A and at least one elastomeric conjugated diene polymer mid block B, and said block copolymer having about 8 to about 65 percent by weight of said monoalkenyl arene polymer block content, each polymer block A having an average molecular weight of between about 5,000 and about 125,000, and each polymer block B having an average molecular weight of between about 10,000 and about 300,000, (b) a polyisobutylene rubber, (c) a partially cross-linked polyisobutylene rubber (d) a compatible tackifying resin, (e) a phenolic antioxidant, (f) a non-reactive phenolic resin, (g) a fluorocarbon surface active agent, and (h) a petroleum derived wax, which adhesive is particularly suitable for bonding auto- motive head lamp and tail lamp lenses to the reflector housing as no fogging of the lamp lens occurs during the bonding process.

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