Fast crystallising polyester compositions

Details Fast crystallising polyester compositions Fast crystallising polyester compositions

C - Chemistry, Metallurgy

08

G

402/215, 400/760

C08G 63/18 (2006.01) C08G 63/46 (2006.01) C08L 67/02 (2006.01)

Patent

CA 1164145

ABSTRACT OF THE DISCLOSURE Fast crystallising 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 ionisable metal salt of an organic compound having at least one acidic proton using sufficient of the ionisable 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.

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