Patent ID: 6703433
Filing Date: 2004-03-09
Classification: C08F,C08L,C09D

Abstract:
A radiation curable composition comprising:(A) an alkenyl ether-functional polyisobutylene polymer in which at least 50 mole percent of the non-terminal repeating units of the polymer are isobutylene units and containing at least one group having the formula â€ƒwherein R is independently selected from the group consisting of monovalent hydrocarbon groups and alkoxy groups, R1 is a divalent hydrocarbon group having from 2 to 20 carbon atoms, R2 and R3 are independently selected from the group consisting of a hydrogen atom and a monovalent hydrocarbon group, and a has a value of 0 to 2; (B) a cationic photoinitiator; and (C) a miscible reactive diluent selected from (i) a difunctional vinyl ether reactive diluent selected from the group consisting of butanediol divinyl ether, pentanediol divinyl ether, hexanediol divinyl ether, heptanediol divinyl ether, cyclohexane dimethanol divinyl ether, ethylene glycol divinyl ether, diethylene glycol divinyl ether, triethylene glycol divinyl ether, neopentyl glycol divinyl ether, ethoxylated2-20 bisphenol A divinyl ether, poly-THF divinyl ether, bis-(4-ethenyloxy butyl)-succinate, bis-(4-ethenyloxy butyl)-adipate, bis-(4-ethenyloxy butyl)-glutarate, bis-((4-((ethenyloxy)methyl)cyclohexyl)methyl)succinate, bis((4-((ethenyloxy)methyl)cyclohexyl)methyl)adipate, and bis-((4-((ethenyloxy)methyl)cyclohexyl)methyl)glutarate or (ii) an acrylate reactive diluent with the formula (R8)Xb â€ƒwherein R8 is a non-silicon containing organic group, X is an organic group containing at-least one acrylate functional group, and b has a value of 2-4.