Manufacturing method of high range water reducing agent having polycarboxylic acid group

摘要

The present invention relates to a method of producing the polycarboxylic acid-based water reducing agent for concrete mixing, ion-exchange water to an initial polymerization solvent and 54 parts by weight of acrylic acid 93.5 parts by weight of the monomer, ethyl acrylate, 10.0 parts by weight of methyl methacrylate 7.5 parts by weight, 2-acrylamido-2-methylpropanesulfonic acid 2.5 parts by weight of the molecular weight control agent n- dodecylmercaptan 1.5 parts by using parts of ammonium persulfate and 5.0 parts by weight ion-exchanged water 50 parts by weight of the solution and the initiator solution to the ball catalyst solution a hydro jeonpeo oxide (35) 6.5 parts by weight of ion-exchanged water after the polymerization, and aged at 90 ℃ using a 20 solution by weight of 50 sodium hydroxide 60 parts by weight for using parts made by neutralizing to pH 7 concrete mixing the polycarboxylic acid acid relates to a method for producing a high-performance water-reducing agent.; The method of the present invention with isopropyl alcohol to fill furo not economical and environmentally friendly way that used as a polymerization solvent, the solid 44, the viscosity has an effect capable of manufacturing a superplasticizer below 1000cps.