Patent ID: 6995192
Filing Date: 2006-02-07
Classification: C08G,G02B

Abstract:
1. A radiation-curable prepolymer obtained by reacting an ethylenically unsaturated amine or an ethylenically unsaturated monohydroxy compound or a mixture thereof with an isocyanate-capped polyurethane, wherein said isocyanate-capped polyurethane is copolymerization product of: (a) at least one poly(ethylene glycol) and at least one block copolymer of formula  wherein R (b) at least one branching agent selected from the group consisting of (c) at least one di- or polyisocyanate of formula  wherein R  wherein said ethylenically unsaturated monohydroxy compound is a hydroxy-substituted lower alkylacrylate, a hydroxy-substituted lower alkylmethacrylate, a hydroxy-substituted lower alkyl-acrylamides, a hydroxy-substituted lower alkyl-methacrylamide, or a hydroxy-substituted lower alkylvinylether, wherein said ethylenically unsaturated amine has formula (4), (4′) or (4″)  In which, I, j and k, independent of one another, are o or 1;