Use of polymers with a poly(meth)acrylic acid main chain, ester-linked alkyl-polyalkylene glycol side chains and free carboxyl groups as controllable dispersants for reducing the viscosity of detergent slurries

摘要

Polymers with a poly(meth)acrylic acid main chain, ester-linked alkylpolyalkylene glycol side chains (average molecular weight = 250-10,000) and free carboxyl groups are used as controllable dispersants for detergents or cleaning materials. The use of polymers as controllable dispersants for detergents or cleaning materials or their components. These polymers (I) comprise: (A) 1-19 wt.% of a poly(meth)acrylic acid main chain in which 0-30 wt.% of the (meth)acrylic acid units may be replaced by maleic acid (or anhydride) and/or fumaric acid units and 0-10 wt.% may be replaced by other ethylenically unsaturated comonomer units; and (B) 81-99 wt.% of side chains comprising (1-30C alkyl)-poly-(2-4C alkylene glycols) with an average molecular weight of 250-10,000, attached to the main chain by ester groups. The ratio of (A):(B) and the average molecular weight of the side chains are such that (I) contains free carboxyl groups. Independent claims are also included for: (a) detergents or cleaning materials containing surfactant(s), builder(s) and 0.2-10 wt.% of (I); and (b) the production of solid detergents or cleaning materials by mixing surfactant(s), builder(s) and optionally other conventional ingredients with water in presence of 0.2-10 wt.% (I) (based on the solids content) and then drying the resulting slurry.