2results about How to "Good anti-mud effect" patented technology

The invention discloses a phosphating monomer as well as a preparation method and application thereof. The phosphating monomer is prepared from acrylic acid hydroxyl ester, a dispersing solvent, phosphorus pentoxide and a polymerization inhibitor. The phosphating monomer has the following structure: # imgabs0 # R1 and R2 are independently selected from any one of the following groups: # imgabs1 # imgabs2 # imgabs3 #. The preparation process of the phosphating monomer provided by the invention is simple, the phosphating monomer can be prepared by using conventional water reducing agent generation equipment, other equipment does not need to be purchased, the equipment consumption is greatly reduced, the energy consumption is low, and the phosphating monomer has good economical efficiency; the prepared polycarboxylate-type water reducer has good dispersion and mud resistance, and besides, the polycarboxylate-type water reducer has a phosphate group with strong adsorption capacity and a carboxylic acid group, so that a better water reducing effect is provided; the novel monomer is synthesized to directly replace an acrylic monomer in the synthetic raw materials of the polycarboxylate superplasticizer, so that the polycarboxylate superplasticizer has better dispersing performance and mud resistance.

This invention relates to the field of concrete admixtures, specifically to an anti-mud polycarboxylate superplasticizer, its preparation method, and its application. The anti-mud polycarboxylate superplasticizer provided by this invention comprises, by weight, the following raw materials: 100-180 parts of unsaturated polyether monomer, 5-10 parts of unsaturated carboxylic acid monomer, 2-5 parts of air-entraining monomer, 5-10 parts of anti-mud monomer, 10-20 parts of oxidant, 0.4-0.6 parts of reducing agent, 5-7 parts of chain transfer agent, and 150-300 parts of water; the air-entraining monomer and the anti-mud monomer have specific structures. The simultaneous introduction of specific anti-mud monomers and air-entraining monomers into the anti-mud polycarboxylate superplasticizer of this invention not only reduces clay adsorption but also provides better dispersibility and anti-mud effect at lower dosages, increasing the overall workability of concrete and improving concrete performance.