Patent ID: 8338530

Claim:
An allophanate-group-comprising polyisocyanate represented by formula (I) wherein R a is a (k+m)-valent radical, k is 0 or a positive number, m is a positive number, whereby (k +m) together add up to a positive number of at least 3, Y is an oxygen or a nitrogen atom, X i , for each i from 1 to n, independently of one another, is selected from the group consisting of —C(CH 3 ) 2 —CH 2 —O—, —CH 2 —CHVin—O—, —CHVin—CH 2 —O—, —CH 2 —CHPh—O —and —CHPh—CH 2 —O—, wherein Ph is phenyl and Vin is vinyl, n for each k and each m, independent of one another, is 1 to 5, and R b for each k and each m, independent of one another, is a radical