Patent ID: 9212269
Filing Date: 2015-12-15
Classification: B32B,C08F,C08J,Y10T

Abstract:
1. A process for producing a rigid foam from a foamable crosslinked polymer, the process comprising polymerizing a mixture comprising: (A) from 30 to 70% by weight of a (meth)acrylic acid, (B) from 0.01 to 15% by weight of a (meth)acrylic diester of a diol, the diol having a molar mass of at least 250 g/mol; (C) from 0.01 to 15% by weight of a blowing agent; (D) from 0 to 10% by weight of a crosslinking agent different from the (meth)acrylic diester of a diol of (B); (E) from 0.01 to 2.0% by weight of at least one polymerization initiator; and (F) from 0 to 20% by weight of at least one conventional additive; wherein the polymerization is conducted in bulk to form the foamable crosslinked polymer; and foaming said polymer to form a rigid foam.