Elastomeric polyesters synthesized from copolyethers

Claim 1

A HIGHLY ELASTIC FIBER-FORMING LINEAR POLYESTER OF EQUIMOLAR PROPORTIONS OF CONSTITUENTS CONSISTING ESSENTIALLY OF DICARBOXYLIC ACID CONSISTUEENTS (A) AND GLYCOL CONSISTUENTS (B) AND (C), SAID LINEAR POLYESTER HAVING AN INHERENT VISCOSITY ABOVE 1.4 AS MEASURED IN A MIXTURE OF 60% PHENOL PLUS 40% TETRACHLOROETHANE AT 25*C., HAVING A CRYSTALLINE MELTING POINT GREATER THAN 150*C. AND BEING CAPABLE OF FROMING HIGHLY ELASTIC FIBERS HAVING A TENACITY OF AT LEAST ABOUT 0.26 GRAM PER DENIER AND HAVING NO MORE THAN ABOUT A 22% DECREASE, AFTER 2.5 MINUTES, IN THE STRESS REQUIRED TO ELONGATE SUCH FIBERS BY 300%, WHEREIN SAID DICARBOXYLIC ACID AND GLYCOL CONSTITUENTS (A), (B) AND (C) ARE AS FOLLOWS: (A) A DICARBOXYLIC ACID IN WHICH THE CARBOXY RADICALS ARE DIRECTLY ATTACHED TO A HEXACARBOCYCLIC RING, (B) A GLYCOL SELECTED FROM THE GROUP CONSISTING OF THE CIS AND TRANS ISOMERS OF 1,4-CYCLOHEXANEDIMETHANOL, (C) A GLYCOL SELECTED FROM THE GROUP CONSISTING OF (C-1) A COPOLYETHER GLYCOL HAVING TWO DIFFERENT REPEATING UNITS IN ITS MOLECULAR STRUCTURE WHICH IS REPRESENTED BY THE FOLLOWING FORMULA: