Process for making polyetheresters with high aromatic ester cont

Details Process for making polyetheresters with high aromatic ester cont Process for making polyetheresters with high aromatic ester cont

1995-03-28

1997-03-18

Mosley, Terressa

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

Synthetic resins

From carboxylic acid or derivative thereof

522 1, 522 93, 522102, 524777, 524783, 524784, 524785, 524786, 524845, 525437, 528176, 528193, 528194, 528272, 528275, 528280, 528281, 528282, 528283, 528286, 528306, 528307, C08G 6378

Patent

active

056124449

ABSTRACT:
A two-step process for making polyetherester resins is disclosed. A low molecular weight polyol reacts with an aromatic dicarboxylic acid in step one to produce a polyester intermediate. In step two, the polyester intermediate reacts with an anhydride or an aliphatic dicarboxylic acid in the presence of an insertion catalyst to produce a polyetherester resin that contains greater than about 10 wt. % of recurring units derived from the aromatic dicarboxylic acid. The polyetheresters are useful for making thermoset resins with excellent mechanical properties and chemical resistance.

REFERENCES:
patent: 4605729 (1986-08-01), Barnes et al.
patent: 5436314 (1995-07-01), Yang et al.

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