Biodegradable plastic composition, biodegradable plastic shaped

Details Biodegradable plastic composition, biodegradable plastic shaped Biodegradable plastic composition, biodegradable plastic shaped

1990-11-13

1992-06-23

Michl, Paul R.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

523125, 525411, 525415, 525450, C08L 6704

Patent

active

051243717

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.

REFERENCES:
patent: 4386174 (1983-05-01), Cogswell et al.
patent: 4438236 (1984-03-01), Cogswell et al.
patent: 4745160 (1988-05-01), Churchill et al.
patent: 4916193 (1990-04-01), Tang et al.
patent: 5019096 (1991-05-01), Fox, Jr. et al.

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