Patent ID: 6162890
Filing Date: 2000-12-19
Classification: C08G,C09J,D06M,Y02P

Abstract:
A linear, water-dispersible, block sulfopolyester including:(i) 70 to 100 mol %, based on total moles of acid equivalents, of at least one difunctional dicarboxylic acid which is not a sulfomonomer;(ii) 2 to 15 mol %, based on total moles of acid and glycol equivalents, of at least one difunctional sulfomonomer containing at least one metal sulfonate group bonded to an aromatic ring, wherein the functional groups on said difunctional sulfomonomer are selected from the group consisting of esters, hydroxyl, or carboxyl groups to provide water-dispersibility to said sulfopolyester;(iii) from about 25 to 99.9 mol %, based on the mol % of hydroxyl equivalents of at least one polyethylene glycol having the structure:H(OCH.sub.2 CH.sub.2).sub.x --OHwhere x is an integer of from 2 to 6;(iv) 0.1 to 20 mol %, based on total moles of hydroxyl equivalents of at least one polyethylene glycol having the structure:H(OCH.sub.2 CH.sub.2).sub.y --OHwhere y is an integer of from 3 to about 500;wherein x<y;wherein the sulfopolyester contains substantially equal molar proportions of acid equivalents and glycol equivalents, and wherein said sulfopolyester has an inherent viscosity of at least 0.28 dL/g measured in a 60/40 parts by weight solution of pheno/tetrachloroethane at 25.degree. C. at a concentration of about 0.50 g of sulfopolyester in 100 ml of solvent.