Preparation process of polyester

Details Preparation process of polyester Preparation process of polyester

1994-04-29

1995-05-02

Acquah, Samuel A.

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

Synthetic resins

From carboxylic acid or derivative thereof

528354, 528355, 528357, C08G 6306

Patent

active

054120675

ABSTRACT:
In the preparation of polyester by conducting ring-opening polymerization of a cyclic ester compound in the presence of a hydroxyl compound as a molecular weight regulator in the reaction system, the molecular weight of polyester can be accurately controlled in the desired range by previously estimating the amount of free carboxylic acid contained in the cyclic ester compound and controlling the amount of the hydroxyl compound on the basis of the estimated amount.

REFERENCES:
patent: 3442871 (1969-05-01), Schmitt et al.
patent: 4859763 (1989-08-01), Takayanagai et al.
patent: 5041529 (1991-08-01), Shinoda et al.
Japanese Industrial Standard, JIS K 0070-1992.

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