A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Preparation method of grafted copolymer and air-entraining and slump-retaining polycarboxylate concrete water reducer
The invention belongs to the technical field of concrete admixtures in chemical building materials, and particularly relates to a preparation method of a grafted copolymer and an air-entraining and slump-retaining polycarboxylate concrete water reducer. The air-entraining and slump-retaining polycarboxylate air-entrained concrete efficient water reducer is synthesized by the following steps: introducing a double bond in the process of preparing a macromonomer with reaction activity through utilization of polyoxyalkylene ether monomers; copolymerizing a product obtained from the former step and carboxylic acid monomers and allylsulfonate monomers in a solution so as to introduce a long side chain. The preparation technology is very simple; the reaction condition is easy to control; industrial three wastes are not generated in the production process; the solvent can be recycled after being recovered; and the solvent recovery rate reaches 98%-100%, so that the economic benefits are ensured; and the environmental pollution is avoided.
Preparation method of grafted copolymer and air-entraining and slump-retaining polycarboxylate concrete water reducer
The invention belongs to the technical field of concrete admixtures in chemical building materials, and particularly relates to a preparation method of a grafted copolymer and an air-entraining and slump-retaining polycarboxylate concrete water reducer. The air-entraining and slump-retaining polycarboxylate air-entrained concrete efficient water reducer is synthesized by the following steps: introducing a double bond in the process of preparing a macromonomer with reaction activity through utilization of polyoxyalkylene ether monomers; copolymerizing a product obtained from the former step and carboxylic acid monomers and allylsulfonate monomers in a solution so as to introduce a long side chain. The preparation technology is very simple; the reaction condition is easy to control; industrial three wastes are not generated in the production process; the solvent can be recycled after being recovered; and the solvent recovery rate reaches 98%-100%, so that the economic benefits are ensured; and the environmental pollution is avoided.
Preparation method of grafted copolymer and air-entraining and slump-retaining polycarboxylate concrete water reducer
WANG FENG (author) / YIN FANGYONG (author) / ZHOU JUNHUA (author)
2015-06-24
Patent
Electronic Resource
English
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