Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1998-02-18
1998-12-29
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...
528274, 528275, 528280, 528281, 528300, 528301, 528302, 528306, 528308, 5283086, 525437, 525444, 524783, 524845, 521 48, 521 485, C08F 2000, C08G 6366, C08J 1104
Patent
active
058543597
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.
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patent: 5436313 (1995-07-01), Klang et al.
patent: 5436314 (1995-07-01), Yang et al.
patent: 5612444 (1997-03-01), Cai et al.
Acquah Samuel A.
Arco Chemical Technology L.P.
Harper Stephen D.
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