Patent ID: 9738597
Date: 2017-08-22
CPC Classifications: C07C,C08G,C09D

Claim:
1. A process for preparing urethane (meth)acrylates of the formula (I) comprising, in a first step, reacting a hydroxyalkyl (meth)acrylate (A) of the formula (A) with a lactone of the formula (B) in the presence of only one zinc compound or bismuth compound (C) and in the absence of an acid to produce a corresponding resulting zinc-containing product or a bismuth-containing product, and, in a further step, reacting the zinc-containing product or the bismuth-containing product with at least one cycloaliphatic or asymmetric aliphatic diisocyanate (D), wherein R R R R n and m independently of one another are positive numbers from 1 to 5.