Preparation method of concrete water reducing agent with ultrahigh water reducing capacity
A technology of concrete water reducing agent and water reducing agent, which is applied in the field of concrete admixture, which can solve the problem of limited improvement of water reducing performance of water reducing agent, and achieve the effect of improving water reducing ability
Active Publication Date: 2016-05-25
JIANGSU SOBUTE NEW MATERIALS +3
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[0006] Aiming at the problem that existing water reducing agents have limited improvement in water reducing performance, the present invention provides a water reducing agent with side chains having both ele
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Abstract
The invention discloses a preparation method of a concrete water reducing agent with ultrahigh water reducing capacity. A macromolecule E with ultraviolet activity is obtained through thermal initiation polymerization of an unsaturated carboxylic acid monomer A, an unsaturated sulfonic acid monomer B and a special monomer C with ultraviolet activity in an aqueous solution by the aid of an initiator D; under the irradiation of ultraviolet light, N-VP (N-vinyl pyrrolidone) and the monomer A are slowly dropwise added to the aqueous solution of the prepared active macromolecule E for a graft polymerization reaction, and the molecule of the water reducing agent is obtained finally. Side chains of the concrete water reducing agent prepared with the method have dual stabilizing functions of electrostatic repulsion and steric hindrance, so that the water reducing capacity is much higher than that of conventional comb-type polycarboxylate water reducing agents.
Description
Technical field [0001] The invention relates to a concrete water reducer with a main chain containing carboxyl and sulfonic acid adsorption groups, and a side chain of a carboxylic acid monomer and vinyl pyrrolidone graft copolymer macromolecule, and a preparation method thereof, belonging to concrete admixture technology field. Background technique [0002] Since the development of polycarboxylic acid dispersant (concrete water reducer) as the third generation of high performance water reducer, it has become the fifth essential component in concrete. Compared with general water reducing agents, it can greatly reduce the water-cement ratio, increase fluidity, improve the pore structure and compactness of concrete, save cement, and ultimately improve the construction performance of concrete and increase the strength and durability of concrete. [0003] The study found that the dispersion mechanism of polycarboxylic acid water reducer is mainly electrostatic adsorption and steric hi...
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Patent Timeline
Login to View More IPC IPC(8): C08F265/02C08F226/10C08F220/06C08F222/02C08F2/48C04B24/16C04B103/30
CPCC04B24/165C04B2103/302C08F2/48C08F265/02C08F226/10
Inventor 刘加平黄振舒鑫冉千平王秀梅张茜赵红霞张志勇
Owner JIANGSU SOBUTE NEW MATERIALS