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Sludge-proof type polycarboxylate water-reducer and normal temperature preparing method thereof

A technology of polycarboxylic acid and water reducing agent, applied in the field of building materials, can solve the problems of insufficient water reduction of concrete, complicated steps, large slump loss, etc., and achieves the advantages of being conducive to large-scale industrial production, simple synthesis process, good resistance to mud effect

Inactive Publication Date: 2015-11-25
KZJ NEW MATERIALS GROUP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the patent CN103467670A, Chen Guoxin and others disclosed a preparation method of a mud-resistant polycarboxylate water reducer. The results of this invention can avoid the adverse effects of the aggregate mud content in concrete on the polycarboxylate water reducer. The problem of insufficient water reduction, large slump loss, and low strength of concrete can be solved without increasing the dosage of polycarboxylate-based water-reducing agent. However, the process needs to be carried out under conditions such as nitrogen protection and vacuum distillation, and the steps are complicated. High cost, difficult to popularize and apply

Method used

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  • Sludge-proof type polycarboxylate water-reducer and normal temperature preparing method thereof
  • Sludge-proof type polycarboxylate water-reducer and normal temperature preparing method thereof
  • Sludge-proof type polycarboxylate water-reducer and normal temperature preparing method thereof

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Effect test

Embodiment 1

[0027] 1) Pre-solution preparation: 200 parts of allyl alcohol polyoxyethylene ether and 0.5 parts of oxidant sodium persulfate were dissolved in 120 parts of distilled water to prepare aqueous solution A; 5 parts of methacryloxyethyl trimethyl chloride Ammonium and 10 parts of dimethylaminoethyl acrylate were dissolved in 30 parts of distilled water to prepare aqueous solution B; 0.2 parts of reducing agent ascorbic acid and 0.3 parts of chain transfer agent thioglycolic acid were dissolved in 30 parts of distilled water to prepare aqueous solution C; 10 parts of acrylic acid Dissolved in 30 parts of distilled water to prepare aqueous solution D;

[0028] 2) Polymerization reaction: Add solution B, C, and D dropwise to solution A at a temperature of 30°C and stir to mix evenly, and the starting time of adding solutions B, C, and D is separated by 10 minutes. And the dropwise addition is completed within 2.0h together, then at 30 ℃ for constant temperature reaction 2.0h, after...

Embodiment 2

[0031] 1) Pre-solution preparation: 200 parts of isopentenol polyoxyethylene ether and 3.5 parts of oxidant ammonium persulfate were dissolved in 120 parts of distilled water to prepare aqueous solution A; 2 parts of 2-methacryloyloxyethyltrimethyl Ammonium chloride and 3 parts of dimethylaminoethyl methacrylate were dissolved in 30 parts of distilled water to prepare aqueous solution B; 0.5 parts of reducing agent sodium hypophosphite and 1.0 parts of chain transfer agent mercaptopropionic acid were dissolved in 30 parts of distilled water to prepare into aqueous solution C; 20 parts of methacrylic acid was dissolved in 30 parts of distilled water to prepare aqueous solution D;

[0032] 2) Polymerization reaction: Add solution B, C, and D dropwise to solution A at a temperature of 30°C and stir to mix evenly, and the starting time of adding solutions B, C, and D is separated by 10 minutes. And the dropwise addition is completed within 3.0 hours, and then react at a constant t...

Embodiment 3

[0035]1) Preparation of pre-solution: 100 parts of allyl alcohol polyoxyethylene ether, 100 parts of isobutyl alcohol polyoxyethylene ether and 5.0 parts of oxidant hydrogen peroxide were dissolved in 120 parts of distilled water to prepare aqueous solution A; 0.5 parts of 2-methyl Acryloyloxyethyltrimethylammonium chloride and 5 parts of dimethylaminoethyl methacrylate were dissolved in 30 parts of distilled water to prepare aqueous solution B; 1.0 parts of reducing agent ascorbic acid, 0.5 parts of reducing agent sodium hypophosphite and 0.5 30 parts of chain transfer agent thioglycolic acid was dissolved in 30 parts of distilled water to prepare aqueous solution C; 30 parts of acrylic acid was dissolved in 30 parts of distilled water to prepare aqueous solution D;

[0036] 2) Polymerization reaction: Add solution B, C, and D dropwise to solution A at a temperature of 20°C and stir to mix evenly, and the starting time of adding solutions B, C, and D is separated by 10 minutes...

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Abstract

The invention discloses sludge-proof type polycarboxylate water-reducer and a normal temperature preparing method thereof. The sludge-proof type polycarboxylate water-reducer is formed by copolymerizing unsaturated fatty alcohol-polyoxyethylene ether macromonomers, unsaturated carboxylic acid, positive ion quaternary ammonium salt and quaternary ammonium acrylic ester by the adoption of a free radical solution at the normal temperature and normal pressure. The sludge-proof type polycarboxylate water-reducer can lower the negative effect of clay on concrete effectively, has the advantages of being slowly released, resistant to sludge, good in adaptability and the like and has good dispersion and dispersion maintaining performance on concrete containing different types of sludge.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a mud-resistant polycarboxylate water reducer and a preparation method thereof at normal temperature. Background technique [0002] With the wide application of polycarboxylate superplasticizers in concrete, some problems have also been exposed at the same time, especially the mud content in sand and gravel has a significant impact on the performance of polycarboxylate superplasticizers, resulting in concrete Poor fluidity and large slump loss have greatly restricted the promotion and application of polycarboxylate superplasticizers. Moreover, domestic high-quality sand and gravel resources for construction are gradually decreasing, and some mud-containing sand and gravel have been widely used as building materials, especially in the field of civil construction. Due to the limitation of regional resources and costs, some sand and gravel with high mud conten...

Claims

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Application Information

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IPC IPC(8): C08F283/06C08F220/34C08F220/06C08F2/38C08F4/40C04B24/26C04B103/30
Inventor 刘木林方云辉赖广兴赖华珍谢木和
Owner KZJ NEW MATERIALS GROUP CO LTD
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