Patent EA-002279-B1 (EA)
Title: Sulfoaryl modified water-soluble or water-dispersible resins from polyethylene terephthalate or terephthalates
Inventor: SALSMAN ROBERT KEITH
IPC: D02G3/00
Filed: 1997-12-01
Abstract: 1. A water-soluble or water-dispersible recycled polyester resin, comprising a reaction product of 1-50% by weight of a sulfoaryl dicarboxylic acid, 10-50% by weight of a terephthalate polymer comprising polyalkylene terephthalate units, 1-50% by weight at least one glycol and optionally 1-50% by weight of at least one oxyalkylated polyol. 2. The resin of Claim 1, wherein sulfoaryl dicarboxylic acid is in an ester form. 3. The resin of Claim 1, comprising a reaction product also containing 15-50% by weight of polyacid. 4. The resin of Claim 3, wherein the polyacid is phthalic anhydride. 5. A water-soluble or water dispersible polyester resin of Claim 2, comprising a reaction product of 1-50% by weight of sulfoaryl dicarboxylate, 10-50% by weight of terephthalate polymer comprising polyalkylene terephthalate units, 1-50% by weight at least one glycol and optionally 1-50% by weight of at least one oxyalkylated polyol. 6. The resin of Claim 5 wherein the sulfoaryl dicarboxylate is dimethylsulfoisophthalate. 7. A water-soluble or water-dispersible polyester resin of Claim 3, comprising a product of further reaction with 3-15% by weight of trimellitic acid or trimellitic anhydride. 8. A water-soluble or water-dispersible resin of Claim 2, comprising a reaction product of 15-50% by weight of ester of sulfoaryl dicarboxylic acid and polyalkylene glycol, 10-50% by weight of waste terephthalate polymer comprising polyalkylene terephthalate units, 10-50% by weight at least one glycol, 15-50% by weight of at least one oxyalkylated polyol, and 15-50% by weight of a polyacid. 9. A water-soluble or water-dispersible resin of Claim 8 wherein ester of sulfoaryl dicarboxylic acid and polyalkylene glycol is the ester of sulfoisophthalic acid and polyethylene glycol. 10. The water-soluble or water-dispersible polyester resin of Claim 2, comprising a reaction product of 1-10% by weight of dimethylsulfoisophthalate, 10-50% by weight of polyethylene terephthalate, 1-25% by weight of diethylene glycol, 1-15% by weight of neopentyl glycol, 1-10% by weight of pentaerythritol, 5-15% by weight of at least one oxyalkylated glycerine having 5-30 % oxyethylene units per hydroxyl, 15-50% by weight of phthalic anhydride, and 5-10% by weight of trimellitic acid or trimellitic anhydride. 11. The water-soluble or water-dispersible polyester resin of Claim 2 comprising a reaction product of 15-35% by weight of the ester of sulfoisophthalic acid and polyethylene glycol, 15-25% by weight of polyethylene terephthalate, 1-10% by weight of oxyethylated glycerine having 5-30 oxyethylene units per hydroxyl, 35-50% by weight of oxyalkyl units per hydroxyl, 35-45% by weight of phthalic anhydride. 12. The water-soluble or water-dispersible polyester of Claim 8 further comprising 0.05-1% by weight of hypophosphoric acid. 13. The water-soluble or water-dispersible polyester resin of Claim 1, wherein the oxyalkylated polyol is selected from the group consisting of pentaerythritol, erythritol, monosaccharose, sorbitol, mannitol, trimethylolpropane or mixtures thereof. 14. The water-soluble or water-dispersible polyester resin of Claim 1 wherein the terephthalate polymer is a waste terephthalate polymer. 15. The water-soluble or water-dispersible and curable polyester resin of Claim 1 wherein the terephthalate polymer is polyethylene terephthalate, polybutylene terephthalate, polycyclohexanedimethanol terephthalate, or a mixture thereof. 16. The water-soluble or water-dispersible polyester resin of Claim 1 wherein the glycol is selected from the group consisting of polyethylene glycol and neopentyl glycol or a mixture thereof. 17. The method for making water-soluble or water-dispersible polyester resin of Claim 1 comprising adding a catalyst taken from the group consisting of acetate, alkyl stannoic acid, alkyl tin oxide, alkyl titanate or a mixture thereof to the reaction mixture. 18. The method for making water-soluble or water-dispersible polyester resin of Claim 17 wherein the catalyst taken from the group consisting of manganese acetate, sodium acetate, dibutyl stannoic acid or a mixture thereof. 19. The method for making water-soluble or water-dispersible polyester resin of Claim 17 comprising dispersing or dissolving the resin in water with an alkali metal or ammonium hydroxide or carbonate. 20. The water soluble or water-dispersible polyester resins of Claim 1, comprising the reaction product of waste terephthalate polymer of the unit formula   wherein R is the residue of an aliphatic or cycloaliphatic glycol of 2-10 carbons or of an oxygenated glycol of the formula HO(CxH2xO)nCxH2xOH, wherein x is an integer from 2-4 and n is 1-10. 21. The water-soluble or water-dispersible polyester resin of Claim 1, wherein the oxyalkylated polyol is glycerol, trimethylolpropane, pentaerythritol, erythritol or a monosaccharide, oxyalkylated with 5-30 moles of ethylene oxide or a mixture thereof, per hydroxyl of the polyol. 22. The water-soluble or water-dispersible polyester resin of Claim 3, dissolved or dispersed in water with an alkali metal or ammonium hydroxide or carbonate. 23. The water solution or water dispersion of Claim 19, diluted with water with a resin solids content of 0.5-50%. 24. Fiber coated with the water-soluble or water-dispersible resin of Claim 1 or 2. 25. Fabric coated with the water-soluble or water-dispersible resin of Claim 1 or 2. 26. Paper coated with the water-soluble or water-dispersible resin of Claim 1 or 2. 27. A dyed fiber incorporating as a dye leveler the water-soluble or water dispersible resin of Claim 1 or 2. 28. A dyed fabric incorporating as a dye leveler the water-soluble or water dispersible resin of Claim 1 or 2. 29. A process for the level dyeing of synthetic fibers derived from polyesters and polyamides, with water insoluble disperse dyestuffs, which comprises adding to the aqueous dyestuffs and pH regulating substances, as levelling agents an effective amount of the resin of Claim 1 to impart level dyeing to said fibers.