Process for the preparation of polyesters having stabilized melt

Details Process for the preparation of polyesters having stabilized melt Process for the preparation of polyesters having stabilized melt

1976-12-16

1978-11-21

Griffin, Ronald W.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 22R, 260 22A, 260 26, 260860, 260DIG24, C08G 6346, C08G 6348

Patent

active

041265920

ABSTRACT:
The melt viscosity of high molecular weight linear polyesters is stabilized in the presence of aromatic (poly-)carbonates by adding a minor proportion of a non-volatile monofunctional ester-forming compound to a mixture of glycol and terephthalate or isophthalate reactants and heating the resulting mixture. The products of the process are suitable for conversion to compositions with aromatic (poly-)carbonates, especially flame retarded such compositions, where stabilized melt viscosity during fabrication is critical.

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