Patent ID: 8829147

Claim:
A polymerizable liquid composition, comprising: (A) at least one cycloaliphatic diisocyanate monomer or a mixture of a cycloaliphatic diisocyanate monomer and a prepolymer; (B) at least one polyol having a functionality between 2 and 5 selected from the group consisting of ethylene glycol, diethylene glycol, triethylene glycol, tetra-ethylene glycol, propylene glycol, dipropylene glycol, tripropylene glycol, tetrapropylene glycol, 1,3-propanediol, 1,4-butanediol, neopentylglycol, 1,6-hexanediol, trimethylolpropane, ditrimethylol propane, glycerin, pentaerythritol, dipentaerythritol and a propoxylated trimethylolpropane having a hydroxyl number of 530 mg KOH/g and a nominal molecular weight of 310 g/mol; and an acid phosphate ester of formula (I) and/or of formula (II): wherein R is an alkyl group with from 1 to 10 carbon atoms, R 1 is an alkyl group having from 1 to 3 carbon atoms and n is 0, 1 or 2, wherein R 2 and R 4 are each independently, alkyl groups having from 1 to 10 carbon atoms, R 3 and R 5 are each independently, alkyl groups having from 1 to 3 carbon atoms and m and p are each independently, 0, 1 or 2; wherein the prepolymer is obtained by reaction of the at least one cycloaliphatic diisocyanate monomer with the at least one polyol catalyzed by the acid phosphate ester, with the proviso that no polyalkoxylated tertiary diamine or metal organic catalyst is present in the composition, and a weight ratio of (A) to (B) is from 1:1 to 2:1.