Solid polycarboxylic acid water reducing agent

A technology of water reducing agent and polycarboxylic acid, which is applied in the field of concrete additives, can solve the problems of increased transportation cost and large performance difference, and achieves the effects of saving transportation cost, facilitating transportation and solving poor performance.

Inactive Publication Date: 2012-03-14
SHANGHAI TAIJIE CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] But now polycarboxylate superplasticizers are mostly liquid products with a concentration of 10-50%. Due to the remote construction site and the existence of a large amount of liquid water solvent in polycarboxylate superplasticizers, the transportation cost continues to increase, so the development High concentration, especially solid polycarboxylate products, is th

Method used

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Examples

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Example Embodiment

[0012] The solid polycarboxylic acid water reducing agent of the present invention is prepared by polymerizing unsaturated acid and other unsaturated monomers in an organic solvent, then neutralizing precipitation and drying at low temperature.

[0013] Wherein, the other unsaturated monomers can be unsaturated alcohol polyethers, unsaturated acids (salts), esters of unsaturated acids, unsaturated amines, unsaturated amides, unsaturated group-containing sulfonates, olefins One or more; the solid polycarboxylic acid water reducing agent can be a copolymer obtained by random, alternating or block copolymerization of the above monomers.

[0014] Wherein, the polycarboxylic acid comonomer can be methacrylic acid, methacrylic acid, crotonic acid, methacrylic acid, hexenoic acid, phenylacrylic acid , Sorbic acid, maleic acid, maleic anhydride, fumaric acid, glutaconic acid, itabaric acid, citric acid, styrene sulfonic acid, vinyl sulfonic acid, allyl sulfonic acid, methallyl Sulfonic ac...

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Abstract

The invention relates to a solid polycarboxylic acid water reducing agent which is prepared by copolymerizing unsaturated acid and an unsaturated monomer in an organic solvent, separating, precipitating and drying at low temperature. The solid water reducing agent is dissolved in a water solvent and has no difference in combination property compared with the commercial liquid polycarboxylic acid water reducing agent with the same concentration. On the premise of no great amount of liquid water reducing agent, the solid polycarboxylic acid water reducing agent is more convenient to transport; and in addition, the transportation cost is greatly reduced.

Description

technical field [0001] The invention relates to a concrete additive, in particular to a solid polycarboxylate water reducer. Background technique [0002] Concrete water reducer refers to an admixture that can reduce the amount of mixing water and improve the strength of concrete under the condition that the workability of concrete and the amount of cement remain unchanged; through surface activity, complexation, electrostatic repulsion or three-dimensional repulsion, etc. To hinder or destroy the flocculation structure of cement particles, so as to save the amount of cement while ensuring the workability and strength of concrete. At present, water reducing agent has become an indispensable fifth component in the current concrete, and more and more attention has been paid to it. [0003] Traditional water reducing agents can be divided into lignosulfonic acids, polycyclic aromatic salts and water-soluble resin sulfonic acids according to the composition materials. Water re...

Claims

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Application Information

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IPC IPC(8): C04B24/26C04B24/16C04B103/30
Inventor 方剑
Owner SHANGHAI TAIJIE CHEM
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