Process for the preparation of copolyester resin having low acet

Details Process for the preparation of copolyester resin having low acet Process for the preparation of copolyester resin having low acet

1997-10-06

1999-01-26

Mosley, Terressa

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

C08G 300

Patent

active

058640053

ABSTRACT:
A copolyester resin having excellent physical properties and a low acetaldehyde content is produced by: polycondensing a mixture of terephthalic acid and isophthalic acid with a glycol in the presence of a phosphate compound to prepare a copolyester prepolymer having an intrinsic viscosity of more than 0.5 dl/g; subjecting the copolyester prepolymer to a first heat-treatment to obtain a pre-crystallized resin; and subjecting the pre-crystallized resin to a second heat-treatment, to obtain a copolyester resin having an intrinsic viscosity of 0.62 to 0.80 dl/g and a melting point of 190.degree. to 240.degree. C.

REFERENCES:
Encyclopedia of Polymer Science and Technology, vol. 11, pp. 62-128, (1988) .

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