Polyesters having increased whiteness

Abstract

Abstract LINEAR SYNTHETIC POLYESTERS HAVING INCREASED WHITENESS, THE IMPROVEMENT IN WHITENESS BEING OBTAINED BY INCOPORATION INTO THE POLYESTERS OF A MINOR AMOUNT OF A DIFUNCTIONAL COMPOUND SELECTED FROM THE GROUP CONSISTING OF 1,3-BIS(2-HYDROXYETHOXY)BENZENE, 3-(2-HYDROXYETHOXY) PHENOL, LOWER ALKYL ESTERS OF ADIPIC ACID, LOWER ALKYL ESTERS OF SUBERIC ACID, LOWER ALKYL ESTERS OF AZELAIC ACID, AND LOWER ALKYL ESTERS OF SEBACIC ACID, WITH 1,3-BIS(2-HYDROXYETHOXY)BENZENE, BIS(2-HYDROXYETHYL) AZELATE, AND DIMETHYL AZELATE BEING PREFERRED. THE POLYESTERS MAY BE PREPARED VIA EITHER DIRECT ESTERIFICATION OR ESTER INTERCHANGE. WHEN ESTER INTERCHANGE IS EMPLOYED THE ESTER INTERCHANGE CATALYST IS SELECTED FROM THE GROUP CONSISTING OF SALTS OF TRANSITIONS METALS IN GROUPS II-B, VII-B, AND VIII OF PERIODS 4 AND 5 OR THE PERIODIC TABLE OF THE ELEMENTS, WITH SALTS OF MANGANESE AND COBALT BEING PREFERRED. WHITENESS IMPROVEMENTS ARE IN THE RANGE FROM 6 TO 41 PERCENT RELATIVE TO THE UNMODIFIED POLYESTERS.

Inventors

• 👤 William E Maycock

Bibliographic Details