Aliphatic polyester polymer blends, methods for manufacturing th

Details Aliphatic polyester polymer blends, methods for manufacturing th Aliphatic polyester polymer blends, methods for manufacturing th

1996-07-11

1998-06-02

Acquah, Samuel A.

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

Synthetic resins

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

525437, 525444, 264239, 26433111, C08F 2000

Patent

active

057601445

ABSTRACT:
Biodegradable polymer blends comprising of a polylactic acid or a copolymer containing lactic acid as the main constituent, and a polyhydroxyalkanoate or a copolymer containing two or more hydroxyalkanoic acids as the constituents; methods for controlling the rate of biodegradation of a polylactic acid or a copolymer containing lactic acid as the main constituent, by blending as above; methods for manufacturing such aliphatic polyester polymer blends; and methods for molding such polymer blends; are provided.
The aliphatic polyester polymer blends obtained in the invention are colorless and clear, and have excellent biodegradabilities, as well as excellent mechanical strengths. The blends can be molded similarly as in conventional thermoplastic resins, so that they can be utilized in many industries, without problems in the waste product treatment after the use. Furthermore, molded products with excellent qualities are obtained from the blends, because of their improved moldabilities.

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Chemical Abstracts, vol. 122, No. 22, Abstract No. 266842 (May 1995).
J. Macromol Science-Pur Appl. Chem., `Effect of Degradation on the Mechanical Properties of Multiphase Polymer Blends: PHBV/PLLA`, vol. A32, No. 4, pp. 771-778 (Mar. 1995).

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