Method for preparing concrete water reducing agents from polycarboxylic acid modified acyl halide grafted composite side chains

• Main Authors: SHEN HEQING, XUE LONG, PANG XIAOFAN, GUAN JIANAN, LIU XIAO, WANG ZIMING
• Format: Patent
• Language: Chinese; English
• Published: 07.12.2016
• Subjects: ARTIFICIAL STONE; CEMENTS; CERAMICS; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; LIME, MAGNESIA; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; REFRACTORIES; SLAG; THEIR PREPARATION OR CHEMICAL WORKING-UP; TREATMENT OF NATURAL STONE

The invention discloses a method for preparing concrete water reducing agents from polycarboxylic acid modified acyl halide grafted composite side chains, and belongs to the field of water reducing agents. By the aid of the method for polymerizing main chains, modifying acyl halide, polymerizing cationic side chains and then carrying out grafting reaction, polycarboxylic acid modified acyl halide grafted composite side chain type concrete reducing agent materials which are excellent in performance can be prepared. The method includes carrying out free radical polymerization on unsaturated carboxylic acid monomers to obtain the polycarboxylic acid main chains; modifying carboxylic acid groups on the main chains to obtain acyl halide groups; forming oxidation-reduction initiation systems from high-valence ceric salt and alcohol, initiating polymerization of unsaturated cationic quaternary ammonium salt monomers by the aid of the oxidation-reduction initiation systems to obtain the hydroxyl-terminated cationic s