Polymerisable styryloxy resins and compositions thereof

Details Polymerisable styryloxy resins and compositions thereof Polymerisable styryloxy resins and compositions thereof

C - Chemistry, Metallurgy

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C08G 18/67 (2006.01) C07C 43/215 (2006.01) C07C 43/23 (2006.01) C07C 45/71 (2006.01) C08F 12/34 (2006.01) C08F 290/04 (2006.01) C08F 299/00 (2006.01) C08G 18/30 (2006.01)

Patent

CA 2002541

Cationically polymerisable styryloxy resins having urethane linkages, represented by the formula III: (see formula I) wherein R1 and R2 are H, or one R1 and R2 is H and the other is methyl; R3 and R4 (which may be the same or different) are H, lower alkyl, or alkoxy if R2 is not methyl; R5 is a divalent hydrocarbon radical; G1 is the residue of an n-valent isocyanate prepolymer prepared by reaction of hydroxyl terminated hydrocarbon polymer halohydrocarbon selected from the groups consisting of a diene homopolymers and copolymers with an aromatic or aliphatic diisocyanate, said prepolymer being free of amino, aliphatic thiol, aliphatic hydroxyl or other groups which interfere with cationic polymerisation. The resins are polymerised with a cationic polymerisation initiator or latent acid catalyst. The resins have utility in the field of electronics.

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