Degradable thermoplastic compositions and blends with naturally biodegradable polymers

摘要

PCT No. PCT/US92/10718 Sec. 371 Date Aug. 18, 1993 Sec. 102(e) Date Aug. 18, 1993 PCT Filed Dec. 4, 1992.The invention provides a compostable thermoplastic polymer composition comprising a thermoplastic polymer, a transition metal salt selected from cobalt, manganese, copper, cerium, vanadium and iron, and a fatty acid or ester having 10 to 22 carbon atoms providing unsaturated species and free acid. The composition will oxidatively degrade to an embrittled state within at least 14 days at 60 DEG C. and a relative humidity of at least eighty percent. The invention also provides degradable multilayered polyolefin structures incorporating a transition metal in the form of a salt, degradable and compostable multilayered barrier films, degradable, radiation-resistant compositions and articles, and methods of forming and using such compositions, structures and articles.