The application describes an admixture comprising a polymer as fluidifier of a cement composition comprising: from 20 to 64 wt. % clinker, from 5 to 60 wt. % activated clay, from 0 to 35 wt. % limestone, from 0 to 10 wt. % calcium sulfate,

the proportions being relative to the dry weight of the cement composition.

The present disclosure belongs to the technical field of preparation of functional materials, and in particular relates to a grinding aid for cement and a preparation method therefor. The components of the grinding aid include a modified alcohol amine of a specific structure and a polycarboxylic acid polymer of a specific structure, and a mass ratio of the modified alcohol amine to the polycarboxylic acid polymer is (1-10):(40-49), and the early strength of the cement can be increased, the water consumption can be reduced, and the fluidity can be improved when the grinding aid is used in cement. The present disclosure adopts the combined action of the modified alcohol amine and the polycarboxylic acid polymer in specific ratios and structures, so that a synergistic effect can be achieved, and the respective performance advantages can be fully exerted.

A multi-component composition, in particular a three-component composition, especially for manufacture of a polyurethane cementitious hybrid flooring, including or made of: a polyol component (A) including at least one polyol and water; a hardener component (B) including at least one polyisocyanate compound; a solid component (C) including at least one hydraulic binder; and wherein at least one of the components of the multi component composition includes at least one comb polymer having a main chain including acid groups, and side chains being attached on the main chain.

A multi-component composition, in particular a three-component composition, especially for manufacture of a polyurethane cementitious hybrid flooring, including or made of: a polyol component (A) including at least one polyol and water; a hardener component (B) including at least one polyisocyanate compound; a solid component (C) including at least one hydraulic binder; and wherein at least one of the components of the multi component composition includes at least one comb polymer having a main chain including acid groups, and side chains being attached on the main chain.

The invention relates to a composition comprising () at least one water-soluble polymer based on (a) 5 to 40 wt % of at least one monomer of the formula (I) and (b) 5 to 95 wt % of at least one monomer (b) which comprises acid groups and is different from monomer (a), and () at least one associative thickener. Further disclosed is a mixture comprising an inorganic binder and also the composition of the invention. A further aspect of the present invention is the use of the composition of the invention as a rheological additive.

The invention relates to a composition comprising () at least one water-soluble polymer based on (a) 5 to 40 wt % of at least one monomer of the formula (I) and (b) 5 to 95 wt % of at least one monomer (b) which comprises acid groups and is different from monomer (a), and () at least one associative thickener. Further disclosed is a mixture comprising an inorganic binder and also the composition of the invention. A further aspect of the present invention is the use of the composition of the invention as a rheological additive.

The present invention relates to the use of a copolymer as a dispersant for binder compositions based on calcium sulfate, the copolymer having a polymer backbone and sidechains bound thereto, and at least one ionizable monomeric unit M1 and at least one sidechain-carrying monomeric unit M2, characterized in that the copolymer has, in a direction along the polymer backbone, a non-random distribution of the monomeric units M1 and/or of the monomeric units M2.

The present invention discloses a multitype-adsorptive-group polycarboxylic acid water-reducing agent, consisting of 30-60 wt % of a macromolecule with multitype-adsorptive groups and water, the macromolecule with multitype-adsorptive groups has a polyethylene glycol side chain, and adsorption groups of the polymer backbone include a carboxylic acid group, a sulfonic acid group and a phosphoric acid group, the phosphoric acid group being linked to the backbone of the macromolecule with multitype-adsorptive groups by nucleophilic addition. The water-reducing agent of the present invention has significantly improved adaptability to different cements and aggregates while maintaining a high water reduction efficiency, compared with the conventional polycarboxylic acid water-reducing agent agent. It has a good water reducing efficiency in many different grades of cement, as well as a better resistance to aggregates containing more impurities such as machine-made sand.

Unsaturated compounds of formula (I): ##STR00001##
wherein: R.sup.1, R.sup.2, and R.sup.3 are each independently H or CH.sub.3; R.sup.4 is a linear or branched C.sub.1-C.sub.30-alkylene; R.sup.5 and R.sup.6 are each independently H, C.sub.1-C.sub.20-alkyl, C.sub.3-C.sub.15-cycloalkyl, aryl, CH.sub.2OC.sub.1-C.sub.20-alkyl, or CH.sub.2OC.sub.2-C.sub.20-alkenyl, where R.sup.5 and R.sup.6 may together form a C.sub.3-C.sub.6-alkylene; R.sup.7 is independently H,C.sub.1-C.sub.4-alkyl, or ##STR00002##
where R.sup.8 is C.sub.1-C.sub.22-alkyl or C.sub.2-C.sub.22-alkenyl; and n is an integer from 2 to 200. Mixtures and polymers including the unsaturated compounds of formula (I). A method for preparing polymers by free-radical polymerization of monomers including the unsaturated compounds of formula (I). A process for preparing polymers including polymer-analogous reactions. And polymers including compounds (I) as cement additives, grinding aids, hydraulic binder additives, concrete plasticizers, reactive plasticizers for preparing plastics, rubber, or latex, associative thickeners and antioxidants, or for preparing polyether siloxanes.

An additive for a hydraulic composition, comprising flaky carbon and an organic compound containing a hydrophilic group and a hydrophobic group with a high affinity for carbon is capable of efficiently improving the strength of a hydraulic composition.