C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
400/2014
C08G 63/672 (2006.01) C06B 45/00 (2006.01) C06B 45/10 (2006.01)
Patent
CA 1337442
A copolyester of long chain and short chain ester units, said long chain ester units being represented by the structure: Image (a) and said short chain ester units being represented by the structure: Image ( b) wherein G is a divalent radical remaining after removal of terminal hydroxyl groups from a poly(alkylene oxide) glycol; R is a divalent radical remaining after the removal of carboxyl groups from a dicarboxylic acid; and D is a divalent radical remaining after removal of hydroxyl groups from a low molecular weight diol; with the proviso that the short chain ester units constitute about 25-65% by weight of the copolyester, at least about 75% of the R groups are 1,3-phenylene radicals, at least about 75% of the D groups are 1,4-butylene radicals, and the sum of the percentages of the R groups which are not 1,3-phenylene radicals and the D groups which are-not 1,4-butylene radicals cannot exceed about 25%; said copolyester being further characterized by a melt index at 120°C by ASTM D1238 of about 2-25 gram/10 minutes.
598618
E. I. Du Pont de Nemours And Company
Sim & Mcburney
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