Process for making polyetherester resins having high aromatic di

Details Process for making polyetherester resins having high aromatic di Process for making polyetherester resins having high aromatic di

1998-07-15

1999-03-09

Acquah, Samuel A.

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

528272, 528301, 528302, 528308, 5283086, 525437, 525444, 525454, C08F 2000

Patent

active

058802258

ABSTRACT:
A process for making polyetherester resins is disclosed. A glycol ester of an aromatic diacid such as terephthalic acid is reacted with a polyether and a source of a dicarboxylic acid such as maleic anhydride to produce a polyetherester resin, wherein the aromatic diester content may be conveniently adjusted as desired. The process permits the preparation of unsaturated polyetherester resins with relatively high levels of terephthalate repeating units while avoiding the difficulties associated with the direct use of terephthalic acid in previously known procedures. Such unsaturated polyetheresters are useful for making thermoset resins with excellent mechanical and physical properties. New glycol esters based on 2-methyl-1,3-propanediol, and polyester resins and thermosets made from the glycol esters, are also disclosed.

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Jeffrey Selley, "Unsaturated Polyesters", Encyclopedia of Polymer Science and Engineering, 2nd Ed., 12, pp. 256-291.

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