Biodegradable plastic composition, biodegradable plastic shaped body and method of producing same
US5124371A · kind A · utility
53Cited by
5References
8Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Nov 13, 1990 |
| Grant date | Jun 23, 1992 |
| Priority date | — |
| Expiry date | Nov 13, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L67/04
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A biodegradable plastic composition is disclosed which includes a polycaprolactone and a poly-.beta.-hydroxybutyrate. Disclosed also is a biodegradable plastic shaped body formed of such a composition. The shaped body may be produced by melt-mixing a blend of a polycaprolactone, a poly-.beta.-hydroxybutyrate and a copolymerization catalyst to copolymerize a portion of the polycaprolactone with a portion of the poly-.beta.-hydroxybutyrate, thereby to obtain a caprolactone/.beta.-hydroxybutyric acid copolymer-containing melt, which is subsequently shaped into a desired form.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.