Process for the manufacture of unsaturated polyester resins

Details Process for the manufacture of unsaturated polyester resins Process for the manufacture of unsaturated polyester resins

1980-03-13

1981-08-18

Phynes, Lucille M.

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

Synthetic resins

From carboxylic acid or derivative thereof

525445, 528272, C08G 6352

Patent

active

042847605

ABSTRACT:
Disclosed is a process for producing styrene-soluble unsaturated polyester resins from DMT process residue. In a preferred embodiment of the process, DMT process residue is transesterified with propylene glycol until a hydroxyl-terminated ester product having a methoxyl content within a specified range is formed and then the resulting ester product is esterified with maleic anhydride.

REFERENCES:
patent: 3647759 (1972-03-01), Walker
patent: 3655820 (1972-04-01), Kaupp

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