Patent · US Expired

Mixture of predominantly one polyhydroxyalkanoate and a compound which contains at least two reactive groups, such as acid and/or alcohol groups, and a polymer prepared by melting the mixture

US5231148A · kind A · utility

28Cited by

3References

8Claims

0Family size

Assignee

PCD Polymere Gesellschaft m.b.H. · AT

Inventors

Andreas Kleinke · Kierspe, DE
Karl-Heinz Reichert · Berlin, DE
Roman Bradel · Berlin, DE

Key dates

Filing date	Nov 19, 1991
Grant date	Jul 27, 1993
Priority date	—
Expiry date	Nov 19, 2011

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08L67/04
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

Mixture containing at least 70% by weight of polyhydroxyalkanoate and one or more compounds which contain reactive alcohol and/or acid groups, mixtures of poly-D (-)-3-hydroxybutyric acid with a polyether being excluded, process for the preparation of a polymer by melting the above mixture and a polymer in which at least some of the acid and/or alcohol groups of the polyhydroxyalkanoate are bonded via ester bonds to alcohol and/or acid groups of the admixed compound.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.