C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
402/131, 402/192
C08G 18/42 (2006.01) C08G 59/00 (2006.01) C08G 63/42 (2006.01)
Patent
CA 1170397
ABSTRACT OF THE DISCLOSURE The present invention is an improvement in a method for making phenol- functional polyster polymer wherein a hydroxybenzoic acid a polyol, and a dicarboxylic acid are subjected to a polyedterificantion reaction under polyesterifi cation conditions to make said polymer. The improvement comprises conducting the reaction in two stages, the first stage comprising the formation of an ester-alcoihol adduct between said hydroxybenzoic acid and an epoxy compound wherein the ratio of carboxyl groups from said hydroxyberzoic acid to said oxirane groups of said epoxy compound is about 1:1. The second stage or the improvement comprises conducting the polyesterification reaction with said adduct.
396565
Ashland Oil Inc.
Gowling Lafleur Henderson Llp
LandOfFree
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