Method of preparing catalyst-free high molecular weight polyeste

Details Method of preparing catalyst-free high molecular weight polyeste Method of preparing catalyst-free high molecular weight polyeste

1978-02-13

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

528480, C08G 6370

Patent

active

041502140

ABSTRACT:
The invention relates to a process for preparing catalyst-free high molecular weight polyester resin by preparing a low polymer having an intrinsic viscosity of from about 0.1 to 0.4 said low polymer being essentially free of catalyst and polymerizing the low polymer 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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