FIELD: chemistry.
SUBSTANCE: copolymer contains as monomer components, a) at least one compound which contains a sulphonic acid group, b) at least one compound selected from a group comprising N-vinyl-caprolactam, N,N-dimethylacrylamide, N,N-diethylacrylamide, isopropylacrylamide, N-vinylpyrrolidone, N-vinylacetamide, N-vinylformamide, N-methyl-N-vinylacetamide, N-alkylacrylate and N-alkylmethacrylate, and c) at least one bifunctional vinyl ester selected from: divinyl ester of triethylene glycol, divinyl ester of diethylene glycol or divinyl ester of butanediol. Also disclosed is use of the copolymer as an additive to hydraulic binders and/or compositions containing components that swell in water.
EFFECT: copolymer is sued as water-retaining or anti-segregation agent.
10 cl, 12 tbl, 20 ex
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