| 摘要 |
FIELD: chemistry.SUBSTANCE: invention relates to use of copolymers of acrylic acid and polyoxyalkylene to obtain an additive which can be used as a liquefying agent and/or a blocking agent for hydraulic binder based on calcium sulphate. The copolymer contains at least one type of repeating units of formula (I):, where: R1, R2, R3 are independently a hydrogen atom, a linear or branched C-Calkyl or a -(CH)-COOR radical or ionic form thereof, where p equals 0 or 1, and R is a hydrogen atom or a C-Calkyl; R4 is a hydrogen atom, a univalent, divalent or trivalent ion or a quaternary ammonium group; wherein said copolymer contains at least one type of repeating units of formula (II):, where: R5, R6, R7 are independently a hydrogen atom, a linear or branched C-Calkyl or a -(CH)-(C=O)-W-(R8-O)-R9 radical; R8 is a linear or branched C-Calkyl; R9 is a hydrogen atom or a linear or branched C-Calkyl; W is an oxygen or nitrogen atom; n is an integer from 0 to 2; m equals 0 or 1; q is an integer from 0 to 200; wherein the molecular weight of said copolymer ranges from 500 to 18000 Da.EFFECT: invention discloses hydraulic binder based on calcium sulphate which contains said polymer, as well as use of said hydraulic binder to make structural building components, and the invention also discloses structural building components.18 cl, 2 dwg, 3 tbl, 4 ex |
