Fast-crystallizing polyester compositions

Details Fast-crystallizing polyester compositions Fast-crystallizing polyester compositions

1993-06-03

1994-03-22

Michl, Paul R.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

524126, C08K 55317

Patent

active

052965210

ABSTRACT:
The present invention relates to fast-crystallizing polyester compositions comprising: (a) a thermoplastic polyester resin; (b) a nucleating agent of the formula: ##STR1## wherein: R is an alkali or alkaline-earth metal; m is 1, 2 or 3; n takes an average value within the range of 1 to 5; said nucleating agent being optionally admixed with the compound of formula (I) wherein R is a hydrogen atom, linear alkyl radial or branched alkyl radical each having from 1 to 6 carbon atoms; with the proviso that at least 50% mole of said nucleating agent is in the salt form. This nucleating additive raises the crystallization temperature upon cooling (T.sub.cc) of the polyester so that crystallization occurs rapidly during molding.

REFERENCES:
patent: 3594347 (1971-07-01), Lazarus et al.
patent: 3637898 (1972-01-01), Herwig et al.
patent: 3900444 (1975-08-01), Racky et al.
patent: 4078016 (1978-03-01), Kramer
patent: 4180495 (1979-12-01), Sandler
patent: 4517355 (1985-05-01), Mercati et al.
patent: 4812502 (1989-03-01), Cipriani et al.
patent: 4981945 (1991-01-01), Landoni et al.

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