Patent ID: 8729160
Filing Date: 2014-05-20
Classification: C04B

Abstract:
1. A method comprising: adding at least one copolymer or a salt thereof acting as a plasticizer and a blocking agent to a calcium sulphate-based hydraulic binder, said copolymer comprising at least one unit of formula (I) in which: R1, R2 and R3 independently represent a hydrogen atom, a linear or branched C R4 represents a hydrogen atom, a monovalent, divalent or trivalent ion, or a quaternary ammonium radical; and said copolymer comprising at least one unit of formula (II) R5, R6 and R7 independently represent a hydrogen atom, a linear or branched C R8 represents a linear or branched C R9 represents a hydrogen atom, or a linear or branched C W represents an oxygen or nitrogen atom;