Shrinkage-reducing polycarboxylic acid type superplasticize, preparation method and application thereof

• Main Authors: ZHOU DUNHONG, YU FENG, LOU ZONGKE, KANG YANG
• Format: Patent
• Language: Chinese; English
• Published: 05.07.2019
• 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; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; REFRACTORIES; SLAG; THEIR PREPARATION OR CHEMICAL WORKING-UP; TREATMENT OF NATURAL STONE

A shrinkage-reducing polycarboxylic acid type superplasticize, a preparation method and an application thereof are disclosed. Free radical copolymerization is performed on monomer A (5-50 parts), monomer B (1-60 parts), monomer C (20-100 parts), monomer D (10-60 parts) and monomer E (1-20 parts) in the presence of an initiator and a chain transfer agent, and finally a base is added to neutralize to adjust the PH to 7-8; wherein monomer A is acrylic acid, acrylic ester, acrylate or acrylic ester salt; monomer B is methacryl sulfonic acid or methacryl sulfonate; monomer C is a polyether monoacrylate or an alkoxy polyether monoacrylate; monomer D is maleic anhydride polyether ester, maleic anhydride hemi-ester, maleic anhydride polyether ester salt or maleic anhydride hemi-ester salt; monomerE is a copolymer of polysiloxane and acrylic acid modify polyether. The invention has features of wide source of raw materials, mature production technology, high water reduction rate, obvious enhancement effect, excellent a