Process for producing an oligoester and producing unsaturated po

Details Process for producing an oligoester and producing unsaturated po Process for producing an oligoester and producing unsaturated po

1980-05-16

1981-12-15

Phynes, Lucille M.

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

Synthetic resins

From carboxylic acid or derivative thereof

525437, 525438, 525445, 525446, 528274, 528303, 560 76, 560 96, C08G 6342

Patent

active

043060560

ABSTRACT:
Processes for producing an oligoester and producing unsaturated polyester resin by use of the oligoester using unsaturated dibasic acid or its anhydride and isophthalic acid as dibasic acid components, and propylene oxide as a polyol component, characterized by (a) the step of reacting isophthalic acid with propylene oxide in the presence of an amine compound catalyst to form an oligoester, (b) the step of removing volatile components from the oligoester by heating it at a temperature range of 180.degree.-300.degree. C., (c) the step of treating the resulting oligoester with silica-alumina compound having adsorbing property, and (d) the step of reacting the oligoester so treated with the unsaturated dibasic acid or its anhydride.

REFERENCES:
patent: 3546176 (1970-12-01), Umfreville
patent: 3723390 (1973-03-01), Carpenter et al.
patent: 3838106 (1974-09-01), Shuki et al.

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