Process for the preparation of polyesters

Details Process for the preparation of polyesters Process for the preparation of polyesters

1977-10-04

1978-12-26

Phynes, Lucille M.

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

Synthetic resins

From carboxylic acid or derivative thereof

528308, C08G 6314

Patent

active

041316010

ABSTRACT:
A process for the preparation of substantially linear, highly polymerized polyesters by polycondensing a glycol ester of an aromatic dicarboxylic acid and/or a low molecular weight condensate thereof, the process being characterized by using as a polycondensation catalyst a preformed titanate compound obtained by reacting a titanic acid ester represented by the formula Ti(OR).sub.4, where R is an alkyl group having from 1 to 5 carbon atoms, with an aromatic acid selected from the group consisting of trimellitic acid, trimellitic anhydride, hemimellitic acid, hemimellitic anhydride or a mixture of one or more thereof at a molar ratio of from about 0.5 to about 2.5 mols of the aromatic acid per 1 mol of the titanic acid ester, to thereby form polyesters which have a high softening point and good color tone. SU

REFERENCES:
patent: 3326965 (1967-06-01), Schultheis et al.
patent: 3346541 (1967-10-01), Davies et al.
patent: 3444139 (1969-05-01), Jeurissen et al.
patent: 3951886 (1976-04-01), Miyake et al.

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