Polyester Concentrates Having High Stability In Solution And Having A Greying-Inhibiting Effect

A soil release polymer comprising an aqueous polyester concentrate having a proportion by weight of polyester of 12 to 60%, the polyester prepared by polymerizing the components selected from the group consisting of

• a) at least one sulfo-free aromatic dicarboxylic acid, salt thereof, anhydride thereof, and/or ester thereof,
• b) optionally at least one sulfo-containing dicarboxylic acid, salts thereof, anhydride thereof, and/or ester thereof,
• c) 1,2-propylene glycol,
• d) ethylene glycol,
• e) at least one compound of the formula (1)
• R1O(CHR2CHR3O)nH (1)
• wherein
• R1 is a linear or branched, saturated or unsaturated alkyl group having 1 to 22 carbon atoms,
• R2 and R3 are each independently hydrogen or an alkyl group having 1 to 4 carbon atoms, and
• n is a number from 1 to 50,
• f) optionally at least one compound of the formula (2)
• H—(OCH2CH2)m—SO3X (2)
• wherein
• m is a number from 1 to 10 and
• X is hydrogen or an alkali metal ion,
• and
• g) optionally at least one crosslinking polyfunctional compound,
• with the proviso that at least one of components b) or f) is present, and with the further proviso that the molar ratio of components c) 1,2-propylene glycol to d) ethylene glycol is greater than or equal to 1.60.

A dispersant comprising an aqueous polyester concentrate having a proportion by weight of polyester of 12 to 60%, the polyester prepared by polymerizing the components selected from the group consisting of

• a) at least one sulfo-free aromatic dicarboxylic acid, salt thereof, anhydride thereof, and/or ester thereof,
• b) optionally at least one sulfo-containing dicarboxylic acid, salts thereof, anhydride thereof, and/or ester thereof,
• c) 1,2-propylene glycol,
• d) ethylene glycol,
• e) at least one compound of the formula (1)
• R1O(CHR2CHR3O)nH (1)
• wherein
• R1 is a linear or branched, saturated or unsaturated alkyl group having 1 to 22 carbon atoms,
• R2 and R3 are each independently hydrogen or an alkyl group having 1 to 4 carbon atoms, and
• n is a number from 1 to 50,
• f) optionally at least one compound of the formula (2)
• H—(OCH2CH2)m—SO3X (2)
• wherein
• m is a number from 1 to 10 and
• X is hydrogen or an alkali metal ion,
• and
• g) optionally at least one crosslinking polyfunctional compound,
• with the proviso that at least one of components b) or f) is present, and with the further proviso that the molar ratio of components c) 1,2-propylene glycol to d) ethylene glycol is greater than or equal to 1.60.