Biodegradable compositions comprising starch and alkenol polymers
AssigneeParke, Davis & Company
InventorsEric George, Eddie Park, Paul A. Altieri, Charles W. Paul
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Abstract
There is provided a biodegradable composition as obtained from a melt comprising converted starch, a plasticizer and at least one member selected from alkenol homopolymers and/or alkenol copolymers which are combined under conditions sufficient to ensure uniform melt formation, in which the at least one member is present in the composition at a concentration of from 10 to 200 parts per 100 parts of dry converted starch. The invention further relates to methods of making the composition, and to articles made from said composition.
Claims45
A biodegradable composition obtained from a melt comprising converted starch, wherein said converted starch has a 8.8% calcium chloride viscosity within the range of about 5 seconds to about 60 seconds, a plasticizer and a member selected from the group consisting of alkenol hompolymers, alkenol copolymers and combinations thereof, which are combined under conditions sufficient to ensure uniform melt formation, wherein the member is present in the composition at a concentration of from about 10 to about 200 parts per 100 parts of dry converted starch.
A composition-according to the preceding claim, in said molar ratio is from about 45:55 to about 70:30.
Dependencies are inferred from the claim text.