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A kind of polycarboxylic acid slump retaining agent modified by phenyl hydroxyl compound 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, achieve excellent performance, increase slump performance, and strong anchoring ability

Active Publication Date: 2022-07-05
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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  • A kind of polycarboxylic acid slump retaining agent modified by phenyl hydroxyl compound atrp method and preparation method thereof

Examples

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example 1

[0038] A preparation method of a polycarboxylic acid slump-retaining agent modified by phenyl-hydroxyl compound ATRP method, the total mass of the raw materials of the present invention is 1000 parts, the mass fraction is 40%, and the process parameters of each component are as follows:

[0039] Vinylbutyl ether polyoxyethylene ether: 350 parts;

[0040] Hydroxyethyl acrylate: 21 parts;

[0041] Styrene: 9 parts;

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

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

[0044] Cuprous bromide: 0.06 part;

[0045] Phenethylphenol polyoxyethylene ether: 3 parts;

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

[0047] The rest is water.

[0048] Step 1: 9 parts of styrene, 15 parts of the composition of acryl alcohol and methacrylic alcohol with a mass ratio of 1:1, 1.3 parts of N,N,N',N",N'-pentamethacrylate methyl group Divinyltriamine, 0.06 parts of cup...

example 2

[0052] A preparation method of a polycarboxylic acid slump-retaining agent modified by phenyl-hydroxyl compound ATRP method, the total mass of the raw materials of the present invention is 1000 parts, the mass fraction is 40%, and the process parameters of each component are as follows:

[0053] Vinylbutyl 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″-methyl hexamethacrylate trivinyltetramine: 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 prenol, 1.6 parts of N,N,N',N',N",N"-methyl hexamethacrylate Vinyltetramine, 0.04 parts of ferrous bromide, 4 parts of 2-acrylamide-2,2-dimethylethanesulfonate sodium and 300 parts of water were added to th...

example 3

[0066] A preparation method of a polycarboxylic acid slump-retaining agent modified by phenyl-hydroxyl compound ATRP method, the total mass of the raw materials of the present invention is 1000 parts, the mass fraction is 40%, and the process parameters of each component are as follows:

[0067] Vinylbutyl ether polyoxyethylene ether: 354 parts;

[0068] The 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 part;

[0072] Cuprous chloride: 0.02 part;

[0073] Fatty alcohol polyoxyethylene ethers: 5 parts;

[0074] Methyl 2-bromo-3-methylbutenoate: 1.4 parts;

[0075] The rest is water.

[0076] Step 1: Combine 5 parts of 4-methoxy-2-vinylaniline, 16 parts of methacrylic alcohol, 0.8 parts of 2,2,-bipyridine, 0.02 parts of cuprous chloride, and 5 parts of fatty alcohol polyoxyethylene ether Add 300 parts of wate...

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Abstract

The invention discloses a polycarboxylic acid slump-preserving agent modified by a phenyl-hydroxyl compound ATRP method and a preparation method thereof. During the preparation process, firstly, 5-10 parts of benzene rings, 7-16 parts of benzene rings and Hydroxyl monomer, 0.7-1.6 part of ligand, 0.02-0.1 part of catalyst, 3-5 part of emulsifier and 300 parts of water, protective dropwise addition of 1.1-2.2 part of initiator at 80-95 ℃ inert atmosphere to prepare block polymer Ⅰ; Then: dropwise add polyether macromonomer and alkyl acrylate to the above-mentioned block polymer Ⅰ, react at 55-70 ℃ and keep warm to prepare polymer Ⅱ; add mass fraction of 30 to polymer Ⅱ % liquid alkali until the pH of the reaction system is about 10, and keeping the temperature at 60° C. until the pH of the system is stable to obtain a polycarboxylic acid slump-retaining agent. The polycarboxylic acid slump retaining agent prepared by the invention has a narrow molecular mass distribution gradient, high effective components, excellent performance, strong dispersibility and slump retention, and the hydration inhibiting ability of the hydroxyl group gives the slump retaining agent additional water reducing ability .

Description

technical field [0001] The invention belongs to the technical field of building material concrete admixtures, and relates to the preparation of a novel polycarboxylic acid slump-retaining agent, in particular to a polycarboxylic acid slump-retaining agent modified by a phenyl-hydroxyl compound ATRP method and a preparation method thereof. Background technique [0002] With the rapid development of the construction industry, the market for commercial concrete is in short supply, and the development of concrete admixtures has also entered a new era. Hotspots, the emergence of polycarboxylate slump-retaining agents with low dosage, high water-reducing rate and good slump retention properties is favored by the market. The characteristics of strong performance and easy operation and preparation make it an indispensable and important component in the construction industry. However, while bringing excellent performance, it also inevitably brings problems such as sensitivity to mud...

Claims

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Application Information

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Patent Type & Authority Patents(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