Blends of biodegradable thermoplastic dialkanoyl polymer, a naturally occurring biodegradable product, a plastic additive and a filler
AssigneeUnion Carbide Corporation
InventorsRobert A. Clendinning, James E. Potts, Walter D. Niegisch
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Abstract
Novel blends comprising biodegradable thermoplastic dialkanoyl polymer, e.g., poly(alkylene adipate), and additional material such as naturally occurring biodegradable product, e.g., tree bark; and to the novel shaped articles therefrom. In one aspect, the invention is directed to novel shaped containers fabricated from material comprising biodegradable thermoplastic dialkanoyl polymer, said containers possessing a germination medium, and optionally, a seed or seedling in such medium.
Claims30
A blend comprising (i) from about 5 to about 95 weight percent of biodegradable thermoplastic dialkanoyl polymer, said polymer having a reduced viscosity value of at least about 0.1 and upwards to about 10 and being further characterized in that at least about 10 weight percent of said thermoplastic dialkanoyl polymer is attributable to recurring units of the formula ##EQU10## wherein R represents a divalent aliphatic hydrocarbon radical, and wherein R' is of the group consisting of divalent aliphatic hydrocarbon radicals and divalent aliphatic oxa-hydrocarbon radicals, (ii) from about 95 to about 5 weight percent of substances of the group consisting of plastic additives, fillers, and mixtures thereof, and (iii) from 0 to about 90 weight percent of a naturally occurring biodegradable product;
- based on the total weight of said blend.
Dependencies are inferred from the claim text.