Process for producing polyester resin

Details Process for producing polyester resin Process for producing polyester resin

1974-03-22

1976-04-20

Briggs, Sr., Wilbert J.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 75T, 260 75UA, 260 75R, 260475D, 260475P, 260485G, 260861, C08J 1104, C08G 6376

Patent

active

039518868

ABSTRACT:
A process for producing polyester resins, such as saturated polyester resin, alkyd resin and unsaturated polyester resin from polyester wastes, which comprises depolycondensing polyester wastes with at least one polyol in the presence of at least one titanyl oxalate compound and/or titanium tartrate compound and subsequently polycondensing the resulting depolycondensation product with at least one polycarboxylic acid or its anhydride or with at least one polycarboxylic acid or its anhydride and at least one polyol, optionally in the presence of at least one phosphorus compound.

REFERENCES:
patent: 3703488 (1972-11-01), Morton
patent: 3830759 (1974-08-01), Barkey

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