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Antirust and high-slump-retaining polycarboxylic acid high-performance water reducing agent and preparation method thereof

A slump-preserving type, polycarboxylic acid technology, applied in the field of water reducing agent processing, can solve the problems of high alkali content, retardation, poor slump retention, etc., to achieve the effect of improving dispersion and accelerating efficiency

Inactive Publication Date: 2020-04-17
浙江天造环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] As the durability and strength requirements of concrete buildings in engineering construction and application are getting higher and higher, this requires the development of water reducing agents with higher performance. The existing high-efficiency water-reducing agents include naphthalene-based high-efficiency water-reducing agents, Melamine-based high-efficiency water-reducers, sulfamate water-reducers and aliphatic water-reducers, etc., due to their low water-reducing rate, poor slump retention, easy to cause obvious retarding effect, high alkali content and other factors, have been It is difficult to meet the technology and requirements of modern concrete. In addition, modern buildings also put forward extremely high requirements for the anti-rust performance of concrete.

Method used

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  • Antirust and high-slump-retaining polycarboxylic acid high-performance water reducing agent and preparation method thereof
  • Antirust and high-slump-retaining polycarboxylic acid high-performance water reducing agent and preparation method thereof
  • Antirust and high-slump-retaining polycarboxylic acid high-performance water reducing agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] An anti-rust and high-slump polycarboxylate high-performance water reducer is processed from the following raw materials in parts by weight:

[0024] 380 parts of methallyl alcohol polyoxyethylene ether, 3.5 parts of hydrogen peroxide, 2 parts of mercaptopropionic acid, 0.5 parts of vitamin C, 35 parts of acrylic acid, 15 parts of caustic soda, 1-ethyl-(3-dimethylaminopropyl 10 parts of carbodiimide hydrochloride, 5 parts of dimethylacetamide, 8 parts of β-glucan, 5 parts of water-based rust inhibitor, 300 parts of water

[0025] The preparation method of embodiment 1, described method step is as follows:

[0026] Step S1: Put methallyl alcohol polyoxyethylene ether and part of the formula amount of water into the reactor, and heat up to 40±2°C for later use;

[0027] Step S2: adding hydrogen peroxide to the material in step S1, and reacting for a period of time;

[0028] Step S3: Using the remaining amount of water, configure mercaptopropionic acid and vitamin C into...

Embodiment 2

[0031] An anti-rust and high-slump polycarboxylate high-performance water reducer is processed from the following raw materials in parts by weight:

[0032] 400 parts of methallyl alcohol polyoxyethylene ether, 4.5 parts of hydrogen peroxide, 2.5 parts of mercaptopropionic acid, 1.0 parts of vitamin C, 40 parts of acrylic acid, 18 parts of caustic soda, 1-ethyl-(3-dimethylaminopropyl base) 20 parts of carbodiimide hydrochloride, 8 parts of dimethylacetamide, 15 parts of β-glucan, 10 parts of water-based rust inhibitor, and 340 parts of water.

[0033] The preparation method of embodiment 2, described method step is as follows:

[0034] Step S1: Put methallyl alcohol polyoxyethylene ether and part of the formula amount of water into the reactor, and heat up to 40±2°C for later use;

[0035] Step S2: adding hydrogen peroxide to the material in step S1, and reacting for a period of time;

[0036] Step S3: Using the remaining amount of water, configure mercaptopropionic acid and...

Embodiment 3

[0039] An anti-rust and high-slump polycarboxylate high-performance water reducer is processed from the following raw materials in parts by weight:

[0040] 390 parts of methallyl alcohol polyoxyethylene ether, 3.75 parts of hydrogen peroxide, 2.125 parts of mercaptopropionic acid, 0.875 parts of vitamin C, 38.5 parts of acrylic acid, 16.5 parts of caustic soda, 1-ethyl-(3-dimethylaminopropyl ) 15 parts of carbodiimide hydrochloride, 6 parts of dimethylacetamide, 10 parts of β-glucan, 8 parts of water-based rust inhibitor, and 325 parts of water.

[0041] The preparation method of embodiment 3, described method step is as follows:

[0042] Step S1: Put methallyl alcohol polyoxyethylene ether and part of the formula amount of water into the reactor, and heat up to 40±2°C for later use;

[0043] Step S2: adding hydrogen peroxide to the material in step S1, and reacting for a period of time;

[0044] Step S3: Using the remaining amount of water, configure mercaptopropionic acid...

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Abstract

The invention relates to an antirust and high-slump-retaining polycarboxylic acid high-performance water reducing agent and a preparation method thereof. The water reducing agent is prepared from, byweight, 380-400 parts of methyl allyl alcohol polyoxyethylene ether, 3.5-4.5 parts of hydrogen peroxide, 2-2.5 parts of mercaptopropionic acid, 0.5-1.0 part of vitamin C, 35-40 parts of acrylic acid,15-18 parts of caustic soda flakes, 10-20 parts of 1-ethyl-(3-dimethylaminopropyl)carbodiimide hydrochloride, 5-8 parts of dimethylacetamide, 8-15 parts of beta-glucan, 5-10 parts of a water-based antirust agent and 300-340 parts of water. Certain amounts of auxiliary agents are added to improve the dispersibility, promote the progress of organic reactions and increase the efficiency of the reactions, whether the 1-ethyl-(3-dimethylaminopropyl) carbodiimide hydrochloride and dimethylacetamide are combined or not has great influence on the reaction efficiency and the water reducing effect, andit is found in practice that the combined use amount of the two auxiliaries is particularly sensitive, and the ideal effect cannot be achieved if the combined use amount is slightly large or slightlysmall. The water reducing agent prepared by using the formula is high in water reducing rate, good in slump loss resistance and good in antirust effect.

Description

technical field [0001] The invention relates to an antirust and high slump retention polycarboxylate high-performance water reducer and a preparation method thereof, belonging to the technical field of water reducer processing. Background technique [0002] Water reducer is a concrete admixture that can reduce the amount of mixing water while maintaining the slump of concrete basically unchanged. Most of them are anionic surfactants, such as lignosulfonate, naphthalenesulfonate formaldehyde polymer, etc. After being added to the concrete mixture, it can disperse the cement particles, improve its workability, reduce the unit water consumption, improve the fluidity of the concrete mixture; or reduce the unit cement consumption and save cement. [0003] As the durability and strength requirements of concrete buildings in engineering construction and application are getting higher and higher, this requires the development of water reducing agents with higher performance. The ex...

Claims

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Application Information

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IPC IPC(8): C04B24/32C04B103/30
CPCC04B40/0039C04B2103/302C04B24/32C04B22/068C04B24/16C04B24/06C04B24/04C04B22/062C04B24/121C04B24/124C04B24/10C04B2103/61
Inventor 聂海波
Owner 浙江天造环保科技有限公司
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