POLYMER OF MALEIC ACID, ALLYL ETHER AND METHACRYLIC ACID COMPOUNDS, AND PREPARATION AND USE THEREOF Russian patent published in 2017 - IPC C08F222/06 C08F216/14 C08F220/06 C04B24/26 C04B24/24 C04B7/00 

FIELD: chemistry.

SUBSTANCE: present invention relates to additives for hydraulically setting systems. Described is a polymer P containing: a) m mol% of at least one structural link A of Formula (I):

b) n mol% of at least one structural link B of Formula (II):

and c) o mol% of at least one structural link C of Formula (III):

where R¹ and R², each independently represents COO^-M, R³ represents H or CH₃, R⁴ represents , R⁵ is an alkylene group with 1–6 C-atoms, R⁶ represents an alkyl group with 1–20 C-atoms, R⁷ represents H or CH₃, R⁸ represents a M, hydroxyalkyl group with 1–6 C-atoms; where substitutes A independently represent from C2- to C4-alkylene group, index q has a value from 2 to 300, in particular from 2 to 50, index r equals 0; where M = cation, preferably H⁺, alkali metal ion, alkali-earth metal ion, divalent or trivalent metal ion, NH₄⁺ or organic ammonium compound, especially preferably H⁺, Na⁺, Ca⁺⁺/2, Mg⁺⁺/2, NH₄⁺ or organic ammonium compound; where m, n, o each independently represents a number, where sum m+n+o=100 and m>0, n>0 and o>0; and where m=10–80, n=10–50, o=10–50. Also described is a method of producing said polymer in presence of a free-radical polymerisation initiator at reaction temperature from 10 °C to 50 °C, preferably, 15 °C to 35 °C. Also described is use of said polymer to improve processability of hydraulically setting compositions. Described is a hydraulically setting composition containing said polymer, and method for preparing it.

EFFECT: obtaining polymers having improved plasticising effect hydraulically setting compositions and providing their good processability during a long period of time.

16 cl, 6 ex, 2 tbl