Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof
Reexamination Certificate
2002-07-30
2009-12-01
Choi, Ling-Siu (Department: 1796)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From carboxylic acid or derivative thereof
C528S293000, C528S296000, C528S272000, C524S445000, C523S124000
Reexamination Certificate
active
07625994
ABSTRACT:
A sulfonated aliphatic-aromatic copolyetherester that comprises the polymerization product of 80.0 to 20.0 mole percent of an aromatic dicarboxylic acid or an ester thereof based on the total moles of dicarboxylic acid or ester thereof, 20.0 to 80.0 mole percent of an aliphatic dicarboxylic acid or an ester thereof based on the total moles of dicarboxylic acid or ester thereof, 0.1 to 10.0 mole percent of a sulfonate component, 99.9 to 91.0 mole percent of a first glycol selected from the group consisting of ethylene glycol, 1,3-propanediol and 1,4-butanediol based on the total moles of glycol, 0.1 to 4.0 mole percent of a poly(alkylene ether) glycol based on the total moles of glycol, 0 to 5.0 mole percent of an other glycol based on the total moles of glycol, and 0 to 5.0 mole percent of a polyfunctional branching agent.
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Choi Ling-Siu
E.I. du Pont de Nemours and Company
Tischler Frances
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