POLYMER MIXTURES AS DEPOSIT INHIBITORS IN WATER SUPPLY SYSTEMS Russian patent published in 2017 - IPC C02F5/08 C08L33/02 C08L35/00 

FIELD: chemistry.

SUBSTANCE: invention relates to mixtures of polymers and a composition, as well as to their use as Deposit inhibitors in water supply systems. Mixture contains in terms of polymer component: (A) 5 to 95 wt% water-soluble or water-dispersible polymer based on: (a1) from 20 to 80 wt% of at least one monomer selected from a group consisting of olefins with 2–8 carbon atoms, allyl alcohol, isoprenol, alkyl vinyl ethers with 1–4 carbon atoms and vinyl ethers of monocarboxylic acids with 1–4 carbon atoms, (a2) from 20 to 80 wt% of at least one monoethylenically unsaturated carboxylic acid with 3–8 carbon atoms, its anhydride or salt, (a3) from 0 to 50 wt% of one or more monomers with sulphonic acid groups, (B) 5 to 95 wt% water-soluble or water-dispersible polymer based on: (b1) from 30 to 100 wt% of at least one monoethylenically unsaturated carboxylic acid with 3–8 carbon atoms, its anhydride or salt, (b2) from 0 to 70 wt% of one or more monomers with sulphonic acid groups, (b3) from 0 to 70 wt% of one or more non-ionic monomers.

EFFECT: technical result is obtaining a composition with improved inhibition of formation of deposits.

30 cl, 3 tbl, 10 ex