Patent ID: 8053497

Claim:
A method of grinding and/or co-grinding mineral matter, the method comprising grinding and/or co-grinding the mineral matter in the presence of a homopolymer of acrylic acid and/or copolymer of acrylic acid with a hydrosoluble monomer, wherein the homopolymer and/or copolymer has a polymolecularity index of under 2.2 determined in an aqueous media by a gel permeation chromatographic (GPC) method, having as a standard a series of 5 sodium polyacrylate standards suppled by Polymer Standard Service a references PAA 18K, PAA 8K, PAA 5K, PAA 4K and PAA 3K, and the homopolymer and/or copolymer comprises at an end of the homopolymer and/or copolymer chain a pattern in accordance with the following formula (I): wherein R 1 is an alkyl radical having 1 to 10 carbon atoms or an aromatic radical that is optionally substituted by an alkyl chain having 1 to 4 carbon atoms; and M is a hydrogen atom, an amine salt, ammonium or an alkaline cation.