CURABLE URETHANE (METH)ACRYLATE POLYMER COMPOSITIONS AND METHODS

摘要

An ethylenically unsaturated polyurethane, which is an oligomer or polymer, results from the reaction of A) an alcohol component comprising: A1) at least one hydroxylated polydiene oligomer or polymer which may optionally be alkoxylated and A2) at least one hydroxyl-functional ethylenically unsaturated compound, which is a monomer or oligomer, bearing at least one ethylenic unsaturation and B) an isocyanate component comprising at least one polyisocyanate with a functionality of at least 2, wherein the molar ratio OH/NCO is greater than 1 and wherein said polyurethane bears reactive free hydroxyl groups. Such ethylenically unsaturated polyurethanes are useful as components of curable compositions such as coatings or adhesives.

主权项

1. A comprising an ethylenically unsaturated polyurethane, wherein said composition results from the reaction of:
A) an alcohol component comprising:
A1) at least one hydroxylated and optionally alkoxylated hydroxylated polydiene oligomer or polymer, optionally said polydiene being hydrogenated; andA2) at least one hydroxyl-functional ethylenically unsaturated compound, which is a monomer or oligomer, bearing at least one ethylenic unsaturation; and B) an isocyanate component comprising at least one polyisocyanate with a functionality of at least 2, wherein the molar ratio OH/NCO is greater than 1; wherein said ethylenically unsaturated polyurethane is an oligomer or a polymer which bears one or more reactive free hydroxyl groups per chain and one or more ethylenic unsaturations derived from A2), per chain and having a number average molecular weight Mn from 1000 to 100000 Daltons.