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grainding and or dispersing aid of mineral materials in aqueous suspension

Use of weakly anionic copolymers as dispersing 2004129 1 The use of a slightly anionic and watersoluble copolymer as a dispersing agent andor an aid to the grinding of mineral pigments andor fillers in aqueous suspension characterised in that the said copolymer consists of a at least one anionic monomer with an unsaturated ethylenic chain and a monocarboxylic function chosen from