Patent ID: 9163111
Filing Date: 2015-10-20
Classification: B05D,B32B,C08F,C08G,C09D

Abstract:
1. An aqueous composition comprising: from 5 to 90% by weight of a polymerizable ethylenically unsaturated water dispersible polyurethane (A) containing at least 0.2 meq/g of allophanate groups and obtained from the reaction of 10 to 60 weight % of at least one polyisocyanate (i), 3 to 25 weight % of at least one hydrophilic compound (ii) containing at least one reactive group capable to react with isocyanate groups and at least one group which is capable to render the polyurethane dispersible in aqueous medium either directly or after a reaction with a neutralizing agent to provide a salt, and 20 to 85 weight % of at least one polymerizable ethylenically unsaturated compound (iii) containing at least one reactive group capable to react with isocyanate groups; and from 15 to 60% by weight relative to the weight of polyurethane (A) of at least one polymerizable ethylenically unsaturated compound (B) having a water solubility at 25° C. of less than 50 g/l, wherein compound (B) is a (meth)acrylate with a weight average molecular weight of at most 1000.