Vinylaromatic block copolymers being highly sensitive to...

Details Vinylaromatic block copolymers being highly sensitive to... Vinylaromatic block copolymers being highly sensitive to...

C - Chemistry, Metallurgy

08

F

C08F 297/04 (2006.01) C08G 81/02 (2006.01) C09D 153/02 (2006.01) C09J 7/02 (2006.01) C09J 153/02 (2006.01)

Patent

CA 2137156

2137156 9324547 PCTABS00028 Radiation sensitive block copolymers (AB)p(B)qX wherein A is a poly(vinylaromatic) block and B is a poly(butadiene) block, wherein X is the residue of a polyvalent coupling agent, wherein p has a number average value of at least 1.5 and wherein q has a number average value of 0 or higher, whereas the sum of p and q values being at least 4, the block copolymer having an average bound vinylaromatic content in the range of from 7 to 35 wt. % and having a total apparent molecular weight in the range of from 50,000 to 1,500,000, and wherein the vinyl content in the poly(butadiene) blocks is in the range of from 35 to 70 %; radiation curable sealing, coating or adhesive compositions comprising said block copolymers, a process for their preparation and pressure sensitive curable tapes or labels derived therefrom.

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