Fast crystallizing polyester compositions

Details Fast crystallizing polyester compositions Fast crystallizing polyester compositions

1981-10-23

1983-07-12

Phynes, Lucille M.

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

524401, 525444, 528272, 5283082, C08F28300, C08G 6376, C08L 6300

Patent

active

043931782

ABSTRACT:
Fast crystallizing polyester compositions obtained by reacting a polyester which comprises aromatic or cycloaliphatic residues obtained from diacids and/or hydroxyacids and aliphatic, aromatic or cycloaliphatic residues of diols with an ionizable metal salt of an organic compound having at least one acidic proton using sufficient of the ionizable metal salt to result in at least 4% of the end groups of the polyester being converted to carboxylate end groups but insufficient to result in the melt degradation performance of the polyester determined as hereinafter described being substantially inferior to that of the polyester in the absence of the salt. Preferred compositions contain a polyester comprising at least 90 mole % of ethylene terephthalate units and metal salts of substituted benzoic acids.

REFERENCES:
patent: 3367926 (1968-02-01), Vocks
patent: 3761450 (1973-09-01), Herwig et al.

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