Preparation process of polyhydroxycarboxylic acid

Details Preparation process of polyhydroxycarboxylic acid Preparation process of polyhydroxycarboxylic acid

1995-07-18

1997-07-08

Seidleck, James J.

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

Synthetic resins

From carboxylic acid or derivative thereof

528354, 528480, 528486, 528494, 528495, 528502R, 528503, C08G 6306

Patent

active

056462387

ABSTRACT:
A preparation process of solid polyhydroxycarboxylic acid comprising subjecting an organic solvent solution of polyhydroxycarboxylic acid to cooling.cndot.solidification and grinding. The preparation process can provide high molecular weight solid polyhydroxycarboxylic acid with ease and cheaply, can be converted with ease to a continuous system, and is useful in industry.

REFERENCES:
patent: 4471077 (1984-09-01), Lange
patent: 4645664 (1987-02-01), Lange
patent: 5310865 (1994-05-01), Enomoto et al.

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