Patent ID: 6884852

Claim:
A polyurethane obtained by reacting Component A, Component B, and Component C wherein Component A comprises at least one polyisocyanate, Component B comprises at least one polyether with a number average molecular weight of at least 4000 and possessing at least one of characteristics (a) or (b): (a) a polydispersity of less than 1.5; or (b) an average OH functionality of about 1.8 to about 2.0, wherein said polyurethane has at least one water-reactive terminal group corresponding to general formula I: in which R 1 and R 2 are the same or different and, independently of one another, represent a linear or branched C 1-10 alkyl group or have the same meaning as R 3 , R 3 is a linear or branched C 1-8 alkoxy group or C 1-8 acyloxy group and n is an integer of 1 to 8, and Component C comprises one or more compounds corresponding to general formula II: in which R 1 and R 2 are the same or different and, independently of one another, represent a linear or branched C 1-10 alkyl group or have the same meaning as R 3 , R 3 is a linear or branched C 1-8 alkoxy group or C 1-8 acyloxy group, X is a group reactive to an isocyanate group or X is a glycidyl group, and n is a number of 1 to 8.