Process for producing poly(3-hydroxybutyric acid)

Details Process for producing poly(3-hydroxybutyric acid) Process for producing poly(3-hydroxybutyric acid)

1994-02-25

1995-07-04

Marquis, Melvyn I.

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

Synthetic resins

From carboxylic acid or derivative thereof

528357, 528361, 556 83, C08G 6308

Patent

active

054301254

ABSTRACT:
A process for producing poly(3-hydroxybutyric acid) comprising ring-opening polymerization of .beta.-butyrolactone is disclosed, wherein the ring-opening polymerization is carried out in the presence of at least one tin compound selected from the group consisting of a distannoxane derivative (e.g., 1-chloro-3-ethoxy-1,1,3,3-tetrabutyldistannoxane), a tin carboxylate compound (e.g., tin dioctanoate), and a di-lower alkyltin oxide (e.g., dibutyltin oxide). Poly(3-hydroxybutyric acid) can be produced in high yield at low cost through simple production steps. The resulting polymer has an increased molecular weight to a degree not heretofore attained.

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