Radiation curable composition

Abstract

The present invention generally relates to the field of radiation curable compositions comprising (meth)acrylated acrylic polymers comprising pendant hydroxyl groups, methods for making these radiation curable compositions and their uses. In particular, the present invention refers to a radiation curable composition (X) comprising at least one (meth)acrylated acrylic polymer (AA) comprising pendant hydroxyl groups which is the reaction product of: a) At least one water-insoluble(meth)acrylic polymer (AP) comprising pendant hydroxyl groups which is the reaction product of: a1) at least one hydroxy functional ethylenically unsaturated monomer (AP1), and a2) at least one ethylenically unsaturated monomer (AP2) which is different from (AP1), and b) At least one isocyanate group-containing monoadduct (MA) comprising at least one (meth)acrylate group and which attaches to the water-insoluble(meth)acrylic polymer (AP) comprising pendant hydroxyl groups by an urethane linkage and which is the reaction product of: b1) at least one polyisocyanate (MA1), and b2) at least one hydroxy functional (meth)acrylate monomer (MA2), wherein the equivalent ratio of NCO groups to OH groups of the radiation curable composition (X) is from 1:0.5 to 1:10 and the glass transition temperature (Tg) of the radiation curable composition (X) after the acrylation is at least 10° C.

Dependencies are inferred from the claim text.