Biodegradable high molecular composition

Details Biodegradable high molecular composition Biodegradable high molecular composition

1996-01-26

1998-10-20

Merriam, Andrew E. C.

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525 93, 525415, 523124, 524539, 528361, C08G 6308

Patent

active

058247513

ABSTRACT:
The biodegradable composition comprises at least poly(beta-hydroxybutyric acid) or a biodegradable copolymer thereof and a stereospecifically regular block copolymer having the structure units of formula (I): ##STR1## where R1 is a hydrocarbon group having 1 to 14 carbon atoms, optionally including double bonds, oxygen atoms or both of them; and m and n are respectively an integer ranging from 300 to 5,000, or having the structure units of formula (II): ##STR2## where R.sup.2, R.sup.3, R.sup.4 and R.sup.5 are either a hydrogen atom or a methyl group; and m and n are respectively an integer ranging from 300 to 5,000.

REFERENCES:
patent: 5124371 (1992-06-01), Tokiwa et al.
patent: 5430125 (1995-07-01), Hori et al.
patent: 5439985 (1995-08-01), Gross et al.
patent: 5440007 (1995-08-01), Gross et al.
patent: 5550173 (1996-08-01), Hammono et al.
Hackh's Chemical Dictionary, Fourth Edition, Grant Ed., McGraw-Hill, NY, NY, 1969, pp. 95, 335.

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