Patent ID: 7230064
Filing Date: 2007-06-12
Classification: C08G

Abstract:
1. A process for the preparation of urethane resins comprising the steps of: (1) reacting a compound (compound(ab)) having at least one active hydrogen being reactive with an isocyanate group in one molecule and having 1 to 10 silicon atoms directly bonded to an alkoxy group with a compound(i) selected from the group consisting of an α, β-unsaturated carbonyl compound and an α, β-unsaturated nitrile compound, in order to produce a product(N) which has active hydrogen being reactive with an isocyanate group in one molecule, the number of active hydrogens in one molecule being less than two; (2) reacting said product(N), with a compound(j) in order to obtain a silicon compound (product(O)) which has isocyanate groups in one molecule, the number of isocyanate groups in one molecule being less than two and which has a hydrolysable alkoxy group directly bonded to at least one silicon atom, wherein said compound (j) has at least two isocyanate groups; and (3) reacting said product(O), with a polyol compound (compound(c)).