Patent ID: 6624283
Filing Date: 2003-09-23
Classification: B29D,C08G,C09J,Y10S,Y10T

Abstract:
An adhesive based on a copolymer comprising urea or urethane groups and also isocyanurate groups wherein the copolymer is a reaction product of:a) a polyisocyanate comprising isocyanurate rings, the polyisocyanate having a functionality equal to or greater than three, b) a functional polymer comprising an amine or alcohol group at each of its chain ends, the functional polymer being selected from the group consisting of polyether diamines, polyether diols, polyester diols and (ester-ether) diol copolymers, and c) at least one trimerization catalyst capable of forming isocyanurate rings from isocyanate groups, wherein the molar ratio of isocyanate groups to amine is between 1.5 and 2.2, and the adhesive is usable at ambient temperature to bond together two cross-linked rubber compositions.