Process for preparing catalyst-free polyester

Details Process for preparing catalyst-free polyester Process for preparing catalyst-free polyester

1978-06-28

1979-04-17

Phynes, Lucille M.

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

Synthetic resins

From carboxylic acid or derivative thereof

C08G 6326

Patent

active

041502159

ABSTRACT:
The invention relates to a process for preparing high molecular weight polyester resin by reacting ethylene glycol with terephthalic acid in the absence of a catalyst and polymerizing the product under solid state polymerization conditions to form high molecular weight polyester.

REFERENCES:
patent: 3330809 (1967-07-01), Perlowski et al.
patent: 3475379 (1969-10-01), Hilaire
patent: 3497477 (1970-02-01), Barkey et al.
patent: 3594350 (1971-07-01), Lofquist et al.

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