FIELD: chemistry.
SUBSTANCE: invention relates to copolymers for adding to concrete or mortar. The copolymer consists of the following structural links: from 0.1 to 50 mol % links obtained from an ethylene unsaturated monomer (a), having from 25 to 300 moles of C2-C3 oxyalkylene groups per mole, from 0.1 to 49.9 mol % links obtained from an alkyl monomer, alkenyl or hydroxyl ester of ethylene unsaturated mono- or dicarboxylic acid, from 0.1 to 90 mol % links obtained from a monomer selected from a group consisting of ethylene unsaturated monocarboxylic acid, its salts, ethylene unsaturated dicarboxylic acid, its anhydride and its salts, and optionally up to 30 mol % of other monomers selected from a group comprising vinyl acetate, styrene, vinyl chloride, acrylonitrile, methallyl sulphonic acid, acrylamide, methacrylamide and styrene sulphonic acid.
EFFECT: achieving optimum concrete mobility while ensuring the required consistency, fluidity and workability.
18 cl, 6 tbl
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