Crystalline polyester resins and process for their preparation

Details Crystalline polyester resins and process for their preparation Crystalline polyester resins and process for their preparation

1998-09-03

1999-11-16

Acquah, Samuel A.

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

Synthetic resins

From carboxylic acid or derivative thereof

528272, 528274, 528279, 528287, 528481, 528491, C08G 6300

Patent

active

059860405

ABSTRACT:
A moldable linear polyester resin consisting essentially of a polyester having the formula: ##STR1## where R is an alkyl from 1 to 6 carbon atoms and n is greater than about 70, said polyester resin being derived from the transesterification reaction of a starting DMCD and a starting CHDM wherein the trans-cis ratio of repeating units derived from DMCD is preferably greater than about 8 to 1, and the trans-cis ratio of repeating units derived from DMCD is preferable greater than about 1 to 1, said polyester resin having crystalline properties with a preferable viscosity greater than 4500 poise and a melting temperature greater than 216 degrees Centigrade.

REFERENCES:
patent: 2891930 (1959-06-01), Caldwell et al.
patent: 2901466 (1959-08-01), Kibler et al.
patent: 4349469 (1982-09-01), Davis et al.
patent: 4897453 (1990-01-01), Flora et al.
patent: 5399661 (1995-03-01), Borman
patent: 5486562 (1996-01-01), Borman et al.

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