Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A kind of preparation method of early-strength polycarboxylate water reducer

A polycarboxylic acid and early-strength technology, which is applied in the field of preparation of early-strength polycarboxylate water-reducing agents, can solve the problems of high equipment requirements, complicated processes, unfavorable environmental protection, etc., and achieves simple preparation process and wide dosage range. , the effect of small loss over time

Active Publication Date: 2021-06-04
ANHUI CONCH GRP +2
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The production of polycarboxylate superplasticizer by esterification process requires high equipment, complicated process and long time, and the water-carrying agent has certain toxicity and high volatility, which is not conducive to environmental protection.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of preparation method of early-strength polycarboxylate water reducer
  • A kind of preparation method of early-strength polycarboxylate water reducer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A preparation method of early-strength polycarboxylate water reducer, comprising the following steps:

[0038] (1) Put 260g of HPEG-2400, 100g of HPEG-3000 and 200g of deionized water into a four-necked flask, stir evenly, heat up to 30°C, add 1g of potassium persulfate and 1.98g of tert-butyl hydroperoxide;

[0039] (2) Stir 0.475g L-ascorbic acid, 0.0912g ferrous sulfate, 0.7g mercaptopropionic acid, 0.66g dodecyl mercaptan, 38g acrylic acid, 20g fumaric acid alcohol amine ester and 250g deionized water to form Mix the solution, and add the mixed solution dropwise to step (1), control the rate of addition, and drop it within 3h;

[0040] (3) After the dropwise addition, continue to heat-preserve and stir the reaction at 30° C. for 2 h, and add 184 g of water to obtain an early-strength polycarboxylate superplasticizer with 40% solid content.

[0041] The preparation method of the alcohol amine fumarate is: mix fumaric acid, monoethanolamine, diethanol monoisopropanol...

Embodiment 2

[0043] A preparation method of early-strength polycarboxylate water reducer, comprising the following steps:

[0044] (1) Put 250g of HPEG-2400, 110g of HPEG-5000 and 200g of deionized water into a four-necked flask, stir evenly, heat up to 30°C, add 1.4g of ammonium persulfate and 2.76g of hydrogen peroxide;

[0045] (2) Stir 0.74g sodium thiosulfate, 0.142g ferrous sulfate, 1.0g mercaptopropionic acid, 0.95g mercaptoacetic acid, 30g acrylic acid, 28g alcohol amine fumarate and 250g deionized water to form a mixed solution , and drop the mixed solution into step (1), control the rate of addition, and drop it within 3h;

[0046] (3) After the dropwise addition, continue to heat-preserve and stir the reaction at 30° C. for 2 hours, and then add 187.5 g of water to obtain an early-strength polycarboxylate superplasticizer with 40% solid content.

[0047] The preparation method of the alcohol amine fumarate is: mix fumaric acid, monoethanolamine, diethanol monoisopropanolamine a...

Embodiment 3

[0049] A preparation method of early-strength polycarboxylate water reducer, comprising the following steps:

[0050] (1) Put 360g of HPEG-3000 and 200g of deionized water into a four-necked flask, stir evenly, heat up to 30°C, add 1.75g ​​of ammonium persulfate and 3.45g of tert-butyl hydroperoxide;

[0051](2) Stir 0.38g L-ascorbic acid, 0.1g sodium hypophosphite, 1.4g thioglycolic acid, 1.33g dodecyl mercaptan, 35g acrylic acid, 35g fumaric acid alcohol amine ester and 250g deionized water, and prepare into a mixed solution, and drop the mixed solution into step (1), control the rate of addition, and drop it within 3h;

[0052] (3) After the dropwise addition, continue to insulate and stir the reaction at 30° C. for 2 h, then add 207.5 g of water to obtain a 40% solid early-strength polycarboxylate water reducer.

[0053] The preparation method of the alcohol amine fumarate is: mix fumaric acid, monoethanolamine, diethanol monoisopropanolamine according to the molar ratio ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a preparation method of an early-strength polycarboxylate water reducer, comprising the following steps: (1) mixing polyether monomers and deionized water, stirring evenly, heating to 30°C, and then adding an initiator , continue to stir; (2) mix alcohol amine fumarate, acrylic acid, chain transfer agent, reducing agent, and deionized water, stir evenly, make a mixed solution, and add the mixed solution dropwise to step (1) (3) After the dropwise addition is completed, the reaction is carried out at 30°C for 2 to 4 hours, and then water is added to adjust the solid content of the system to obtain an early-strength polycarboxylate superplasticizer. The water-reducing agent obtained according to the preparation method disclosed in the present invention has a high water-reducing rate, good slump retention, can greatly improve the early strength, and has a relatively high later strength, and can be applied to pipe piles and prefabricated components that need to improve the early strength and other concrete products.

Description

technical field [0001] The invention belongs to the technical field of concrete admixtures, and in particular relates to a preparation method of an early-strength polycarboxylate water reducer. Background technique [0002] Polycarboxylate superplasticizer, as a new generation of green and environment-friendly high-performance superplasticizer, has excellent compatibility with cement, and has the advantages of low dosage, high water reducing rate and good slump retention. It has been used in the engineering field be widely used. [0003] With the increase of infrastructure construction projects such as railways, highways, and airports, as well as the prefabricated building policy that the country is currently vigorously promoting, the demand for prefabricated components in engineering is increasing. The research is applicable to prefabricated concrete, which can greatly improve the early strength of concrete. , The early-strength polycarboxylate superplasticizer that accele...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C08F283/06C08F220/06C08F222/22C08F2/38C04B24/26C04B103/30
CPCC04B24/2694C04B2103/302C08F2/38C08F283/06C08F220/06C08F222/22
Inventor 熊磊肖慧丽徐文祥沈江平王一健李保军
Owner ANHUI CONCH GRP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com