Polyester compositions which comprise cyclobutanediol,...

Details Polyester compositions which comprise cyclobutanediol,... Polyester compositions which comprise cyclobutanediol,...

2006-12-07

2010-06-15

Cano, Milton I (Department: 1796)

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

Synthetic resins

From carboxylic acid or derivative thereof

C528S302000, C528S305000, C528S307000

Reexamination Certificate

active

07737246

ABSTRACT:
Described as one aspect of the invention are polyester compositions comprising at least one polyester which comprises:(a) a dicarboxylic acid component comprising:(i) about 90 to about 100 mole % of terephthalic acid residues;(ii) about 0 to about 10 mole % of aromatic and/or aliphatic dicarboxylic acid residues having up to 20 carbon atoms; and(b) a glycol component comprising:(i) about 20 to about 40 mole % 2,2,4,4-tetramethyl-1,3-cyclobutanediol residues; and(ii) about 20 to about 40 mole % cyclohexanedimethanol residues;(iii) ethylene glycol residues, and(iv) less than about 2 mole % of a modifying glycol having from 3 to 16 carbon atoms;wherein the total mole % of the dicarboxylic acid component is 100 mole %, andwherein the total mole % of the glycol component is 100 mole %; andwherein the inherent viscosity of the polyester is from 0.50 to 1.2 dL/g as determined in 60/40 (wt/wt) phenol/tetrachloroethane at a concentration of 0.25 g/50 ml at 25° C. The polyesters may be manufactured into articles.

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