Patent ID: 9388077
Filing Date: 2016-07-12
CPC Classification: C04B

Claim Text:
1. A process for the preparation of a hardening accelerator composition by reaction of a water-soluble calcium compound with a water-soluble silicate compound, the reaction of the water-soluble calcium compound with the water-soluble silicate compound being carried out in the presence of an aqueous solution which contains a water-soluble comb polymer suitable as a plasticizer for hydraulic binders, wherein the water-soluble comb polymer suitable as a plasticizer for hydraulic binders is present as a copolymer which is produced by free radical polymerization in the presence of a phosphorylated monomer and a (meth)acrylic acid ester based polyether macromonomer, so that a structural unit is produced in the comb polymer by incorporation of the phosphorylated acid monomer in the form of polymerized units, which structural unit is in accordance with general formula (I) where R where n =2, 3 or 4, M and that a structural unit is produced in the comb polymer by incorporation of the (meth)acrylic acid ester based polyether macromonomer in the form of polymerized units, which structural unit is in accordance with general formula (II), where R A are identical or different and are represented by C a are identical or different and are represented by an integer from 65 to 160, R