Patent ID: 8552111

Claim:
A composition comprising: a polyvinylchloride homopolymer; a biodegradable plasticizer; a swelling agent wherein the polyvinylchloride homopolymer is a polymer backbone chain; and further comprising a blowing agent and a carbohydrate coupled off the polyvinylchloride homopolymer backbone chain; wherein said blowing agent comprises a chemical blowing agent, expandable microspheres, or combinations therefore; and wherein said plasticizer is between about 30-60 pbw, said carbohydrate is between about 1-20 pbw, said swelling agent is between about 1-20 pbw, said expandable microspheres are between about 1-20 pbw, and said chemical blowing agent is between about 0-10 pbw, in which pbw is parts by weight per 100 parts polyvinylchloride homopolymer.