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US 6,323,307 B1Granted
Degradation control of environmentally degradable disposable materials
AssigneeCargill Dow Polymers, LLC
InventorsDonald M. Bigg, Richard G. Sinclair, Edward S. Lipinsky, John H. Litchfield, Billy R. Allen
Life of this patent
Estimating the term…
Abstract
The present invention is directed to a method for reducing waste accumulation by using an environmentally degradable disposable material. The disposable material, which includes a hydroxycarboxylic acid-containing polymer, degrades hydrolytically during operative and disposal stages in a controlled manner such that the disposal degradation rate of the material is accelerated relative to the operative degradation rate of the material.
Claims5
A composition comprising:
- a) a lactide polymer, and
- b) an effective amount of lactide to stabilize said composition by reducing depolymerization reactions during melt processing, wherein said melt processing is at a temperature of about 375° F.
A composition comprising:
- a) a 90/10 L-/D,L-lactide copolymer, and
- b) lactide in a concentration of about 15 to about 20 percent by weight, whereby said lactide stabilizes said composition by reducing depolymerization reactions during compounding or extruding at temperatures of about 375° F.
Dependencies are inferred from the claim text.