Patent ID: 7662801
Filing Date: 2010-02-16
Classification: C08B

Abstract:
1. A monolithic transparent film comprising a biodegradable oxidized cellulose ester, said oxidized cellulose ester having the following general formula I or II, wherein said film is modified from an oxidized cellulose having a carboxyl content from 3% to 25%: wherein: X is selected from the group consisting of H, Na, K, Ca, NH whereby R is (CH w is 0.1-1.0; x is 0.1-2.0; and n is 30-1500; and wherein: X is selected from the group consisting of H, Na, K, Ca, NH R′ and R″ are each selected from the group consisting of: H; CF w is 0.1-1.0; x′ is 0.1-1.9; y is 0.1-1.9; and n is 30-850.