Patent ID: 8361678

Claim:
A polyurethane composition comprising A) a polyisocyanate component; B) an isocyanate-reactive component comprising a hydroxy-functional multiblock copolymer B1) of the type Y(X i —H) n having a number average molecular weight of greater than 1000 g/mol; wherein X i is an oxyalkylene units of formula (I): —CH 2 —CH(R)—O— (I); i is an integer from 1 to 10; n is an integer from 2 to 8; R is a hydrogen, alkyl, or aryl radical, wherein said alkyl or aryl radical is optionally substituted or interrupted by a heteroatom; and Y is the fundamental initiator and the proportion of the segments X i , based on the total amount of the segments X i and Y, accounts for at least 50% by weight; C) free-radically polymerizable compound free of NCO groups; D) free radical stabilizers; E) photoinitiators; F) optionally catalysts; and G) optionally auxiliaries and additives.