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Polycarboxylic acid slump retaining agent modified by phenyl hydroxyl composite ATRP method and preparation method thereof

A technology of phenyl hydroxyl and phenyl hydroxyl block, which is applied in the field of building material concrete admixture, can solve the problem of low sensitivity, and achieve the effect of excellent performance, good adaptability, and gentle reaction environment

Active Publication Date: 2020-03-27
HUBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The double ester group is hydrolyzed under the alkaline condition of cement paste, and more carboxyl groups are released slowly, which can improve the slump performance of concrete. lower

Method used

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  • Polycarboxylic acid slump retaining agent modified by phenyl hydroxyl composite ATRP method and preparation method thereof

Examples

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Effect test

example 1

[0038] A kind of preparation method of the polycarboxylate slump-retaining agent modified by phenyl hydroxyl composite ATRP method, the total mass of raw material of the present invention is 1000 parts, and mass fraction is 40%, and each component process parameter is as follows:

[0039] Vinyl butyl ether polyoxyethylene ether: 350 parts;

[0040] Hydroxyethyl acrylate: 21 parts;

[0041] Styrene: 9 parts;

[0042] The composition of allyl alcohol and methacryl alcohol with a mass ratio of 1:1: 15 parts;

[0043] N,N,N',N",N'-pentamethacrylate-divinyltriamine: 1.3 parts;

[0044] Cuprous bromide: 0.06 parts;

[0045] Phenylphenol polyoxyethylene ether: 3 parts;

[0046] 1-Bromo-3-methyl-2-butene: 1.6 parts;

[0047] The rest is water.

[0048] Step 1: Mix 9 parts of styrene, 15 parts of a composition of allyl alcohol and methacrylic alcohol with a mass ratio of 1:1, and 1.3 parts of N,N,N',N",N'-pentamethacrylate Add divinyltriamine, 0.06 parts of cuprous bromide, 3 part...

example 2

[0052] A kind of preparation method of the polycarboxylate slump-retaining agent modified by phenyl hydroxyl composite ATRP method, the total mass of raw material of the present invention is 1000 parts, and mass fraction is 40%, and each component process parameter is as follows:

[0053] Vinyl butyl ether polyoxyethylene ether: 348 parts;

[0054] Hydroxypropyl acrylate: 24 parts;

[0055] 1-allyl-4-fluorobenzene: 7 parts;

[0056] Prenol: 14 parts;

[0057] N,N,N',N',N″,N″-hexamethacrylate triethylenetetramine: 1.6 parts;

[0058] Ferrous bromide: 0.04 parts;

[0059] Sodium 2-acrylamide-2,2-dimethylethanesulfonate: 4 parts;

[0060] Methallyl chloride: 1.9 parts;

[0061] The rest is water.

[0062] Step 1: 7 parts of 1-allyl-4-fluorobenzene, 14 parts of isopentenol, 1.6 parts of N,N,N',N',N",N"-hexamethacrylate Add vinyltetramine, 0.04 parts of ferrous bromide, 4 parts of 2-acrylamide-2,2-dimethylethanesulfonate sodium and 300 parts of water into the No. Nitrogen 3...

example 3

[0066] A kind of preparation method of the polycarboxylate slump-retaining agent modified by phenyl hydroxyl composite ATRP method, the total mass of raw material of the present invention is 1000 parts, and mass fraction is 40%, and each component process parameter is as follows:

[0067] Vinyl butyl ether polyoxyethylene ether: 354 parts;

[0068] Composition of hydroxyethyl acrylate and hydroxypropyl acrylate with a mass ratio of 2:1: 18 parts;

[0069] 4-methoxy-2-vinylaniline: 5 parts;

[0070] Methacryl alcohol: 16 parts;

[0071] 2,2,-bipyridine: 0.8 parts;

[0072] Cuprous chloride: 0.02 parts;

[0073] Fatty alcohol polyoxyethylene ethers: 5 parts;

[0074] 2-Bromo-3-methylbutenoic acid methyl ester: 1.4 parts;

[0075] The rest is water.

[0076] Step 1: Mix 5 parts of 4-methoxy-2-vinylaniline, 16 parts of methacryl alcohol, 0.8 part of 2,2,-bipyridyl, 0.02 part of cuprous chloride, 5 parts of fatty alcohol polyoxyethylene ether Add 300 parts of water into the ...

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Abstract

The invention discloses a polycarboxylic acid slump retaining agent modified by a phenyl hydroxyl composite ATRP method and a preparation method thereof. In the preparation process, firstly 5-10 partsof benzene rings, 7-16 parts of hydroxyl monomers, 0.7-1.6 parts of ligands, 0.02-0.1 part of a catalyst, 3-5 parts of an emulsifier and 300 parts of water are added into a first reaction kettle, and1.1-2.2 parts of an initiator is dropwise added protectively at the inert atmosphere of 80-95 DEG C to prepare a block polymer I; a polyether macromonomer and alkyl acrylate are dropwise added into the block polymer I to react at 55-70 DEG C and keep the temperature to prepare a polymer II; and liquid caustic soda with the mass fraction of 30% is added into the polymer II until the pH value of the reaction system is about 10 and the temperature is kept at 60 DEG C until the pH value of the system is stable to obtain the polycarboxylic acid slump retaining agent. The prepared polycarboxylic acid slump retaining agent is narrow in molecular mass distribution gradient, high in effective component content and excellent in performance and has high dispersity and slump retaining property, and the slump retaining agent is endowed with additional water reducing capacity due to the hydration inhibition capacity of hydroxyl.

Description

technical field [0001] The invention belongs to the technical field of concrete admixtures for building materials, and relates to the preparation of a novel polycarboxylate slump retaining agent, in particular to a polycarboxylate slump retainer modified by a phenyl hydroxyl complex ATRP method and a preparation method thereof. Background technique [0002] With the rapid development of the construction industry, the commercial concrete market is in short supply, and the development of concrete admixtures has also entered a new era. The amount of concrete and cement is increasing. As one of the important components of concrete, slump-retaining agents have become the research and development of concrete. Hot spot, the appearance of polycarboxylate slump retaining agent with low content, high water reducing rate and good slump retention is favored by the market. Polycarboxylate slump retainer can not only significantly improve the all-directional indicators of concrete, but Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F293/00C08F216/14C08F220/20C08F212/08C08F216/08C08F216/04C08F212/14C08F230/06C04B24/26
CPCC08F293/005C08F216/1416C08F220/20C08F212/08C08F216/04C08F230/06C04B24/2694C08F216/08C08F212/14
Inventor 陈艳林饶黎柯凯
Owner HUBEI UNIV OF TECH
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