METHOD FOR PRODUCING GRANULATED OR POWDERY DETERGENT COMPOUNDS

• Main Authors: SEEBECK, TANJA, MICHL, KATHRIN
• Format: Patent
• Language: English; French
• Published: 05.01.2006
• Subjects: ANIMAL AND VEGETABLE OILS, FATS, FATTY SUBSTANCES AND WAXES; CANDLES; CHEMISTRY; DETERGENT COMPOSITIONS; DETERGENTS; FATTY ACIDS THEREFROM; METALLURGY; RECOVERY OF GLYCEROL; RESIN SOAPS; SOAP OR SOAP-MAKING; USE OF SINGLE SUBSTANCES AS DETERGENTS

The present invention relates to a process for preparing granular or pulverulent detergent compositions, comprising the preparation of a detergent base powder by drying an aqueous detergent slurry, which comprises adding to the slurry a copolymer which is obtainable by free-radical copolymerization of (A) from 50 to 99.5 mol % of a monoethylenically unsaturated monocarboxylic acid and/or a salt thereof, (B) from 0.5 to 20 mol % of an alkoxylated monoethylenically unsaturated monomer I in which the variables are defined as follows: R1 is hydrogen or methyl; R2 is -(CH2)x-O-, -CH2-NR5-, -CH2-O-CH2-CR6R7-CH2-O- or -CONH-; R3 are each identical or different C2-C4-alkylene radicals which may be arranged blockwise or randomly, the proportion of ethylene radicals being at least 50 mol %; R4 is hydrogen, C1-C4-alkyl, -SO3M or -PO3M2; R5 is hydrogen or -CH2-CR1-CH2; R6 is -O-[R3-O]n-R4, where the -[R3-O]n- radicals may be different from the further -[R3-O]n- radicals present in formula I; R7 is hydrogen or ethyl; M is alkali metal or hydrogen; n is from 4 to 250; x is 0 or 1, (C) from 0 to 50 mol % of a monoethylenically unsaturated dicarboxyic acid, of an anhydride and/or of a salt thereof and (D) from 0 to 20 mol % of a further copolymerizable monoethylenically unsaturated monomer and has an average molecular weight Mw of from 30 000 to 500 000 g/mol and a K value of from 40 to 150 (measured at pH 7 in 1% by weight aqueous solution at 25° C.).