Block polyesters and like compounds having branched hydrophilic cappinggroups useful as soil release agents in detergent compositions

Abstract From the Canadian patent

Block polyesters having branched hydrophilic capping groups which are useful as soil release agents in detergent compositions are disclosed. Preferred polyesters have the formula: wherein each R1 is a 1,4-phenylene molety; the R2 are essentially ethylene moieties, 1,2-propylene moieties or a mixture thereof; each X is ethyl or preferably methyl; each n1 is from 1 to about 5; the sum of each n1 + n2 is from about 12 to about 43; u is from about 3 to about 10.