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

A kind of synthetic technology of slump-retaining polycarboxylate water reducer

A polycarboxylic acid-based and synthetic process technology is applied in the field of synthesis process of slump-preserving polycarboxylate-based water-reducing agent, which can solve the problems of weak slump-preserving ability, affecting construction progress, and prolonging concrete setting time. Good slump stability, excellent workability and small slump loss

Active Publication Date: 2017-10-03
HEBEI SANKAISHENFA SCI & TECH CORP LTD
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the addition of retarder fundamentally does not solve its weak slump-preserving ability. If the amount is too large, it will prolong the setting time of concrete and affect the construction progress of the project.

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 synthetic technology of slump-retaining polycarboxylate water reducer
  • A kind of synthetic technology of slump-retaining polycarboxylate water reducer
  • A kind of synthetic technology of slump-retaining polycarboxylate water reducer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029]Add 250 g of deionized water into a 2000 mL four-neck flask, preheat to 30°C, add 430 g of prenol polyoxyethylene ether macromonomer with a molecular weight of 3900 and stir to dissolve. After the macromonomer is dissolved, add 4.77 g of hydrogen peroxide and stir evenly, and add A separately at 30°C with a peristaltic pump. 1 Solution (an aqueous solution consisting of 17.2 grams of acrylic acid, 21.5 grams of β-carboxyethyl acrylate and 25.8 grams of deionized water) was added dropwise for 2.5 hours, and solution B (8.6 grams of 3-allyloxy-2-hydroxypropanesulfonic acid Sodium and the aqueous solution that 77.4 grams deionized water forms) drop time 2.5h and C 1 Solution (an aqueous solution consisting of 1.19 grams of vitamin C, 2.39 grams of 3-mercaptopropionic acid, and 139.62 grams of deionized water) was added dropwise for 2.5 hours.

[0030] A 1 Liquid, B liquid and C 1 After the liquid drops, add 4.26 grams of hydrogen peroxide and stir evenly, and immediately...

Embodiment 2

[0033] Add 250 g of deionized water into a 2000 mL four-neck flask, preheat to 30°C, add 430 g of prenol polyoxyethylene ether macromonomer with a molecular weight of 3900 and stir to dissolve. After the macromonomer is dissolved, add 7.29 g of hydrogen peroxide and stir evenly, and add A separately at 30°C with a peristaltic pump. 1 Solution (an aqueous solution consisting of 21.5 grams of acrylic acid, 23.65 grams of β-carboxyethyl acrylate and 30.1 grams of deionized water) was added dropwise for 2.5 hours, solution B (10.75 grams of 3-allyloxy-2-hydroxypropanesulfonic acid Sodium and 96.75 grams of deionized water aqueous solution) drop time 2.5h and C 1 Solution (an aqueous solution consisting of 1.21 grams of vitamin C, 2.43 grams of 3-mercaptopropionic acid and 141.96 grams of deionized water) was added dropwise for 2.5 hours.

[0034] A 1 Liquid, B liquid and C 1 After the liquid drops, add 4.26 grams of hydrogen peroxide and stir evenly, and immediately dropwise ad...

Embodiment 3

[0037] Add 250 g of deionized water into a 2000 mL four-neck flask, preheat to 30°C, add 430 g of prenol polyoxyethylene ether macromonomer with a molecular weight of 3900 and stir to dissolve. After the macromonomer is dissolved, add 6.07 g of hydrogen peroxide and stir evenly, and add A separately at 30°C with a peristaltic pump. 1 Solution (an aqueous solution consisting of 25.8 grams of acrylic acid, 17.2 grams of β-carboxyethyl acrylate and 28.7 grams of deionized water) was added dropwise for 2.5 hours, and solution B (12.9 grams of 3-allyloxy-2-hydroxypropanesulfonic acid Sodium and the aqueous solution that 116.1 gram deionized waters form) drop time 2.5h and C 1 Solution (an aqueous solution composed of 1.22 grams of vitamin C, 2.43 grams of 3-mercaptopropionic acid and 142.35 grams of deionized water) was added dropwise for 2.5 hours.

[0038] A 1 Liquid, B liquid and C 1 After the liquid drops, add 4.35 grams of hydrogen peroxide and stir evenly, and immediately ...

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 synthesis process of a slump-retaining polycarboxylate water reducer. Specifically, β-carboxyethyl acrylate with high water-reducing function and slump-retaining function and 3-allyloxy-2-hydroxypropanesulfonate sodium with high water-reducing function were introduced during the synthesis process. The slump-preserving component introduces monomers with special functions such as diethylene glycol monoacrylate. The synthesis process is to use the molecular weight regulator of the redox initiation system in the water phase to synthesize the monomers with water-reducing function and slump-preserving function in a one-pot staged relay dropwise synthesis method. The concrete test proves that the synthetic product not only has water-reducing and slump-retaining properties, but also greatly improves the workability of fresh concrete and reduces the sensitivity of the water-reducing agent to water consumption. It is a slump-retaining polymer Carboxylic acid water reducer.

Description

technical field [0001] The invention relates to the technical field of concrete admixture synthesis, and more specifically relates to a synthesis process of a slump-preserving polycarboxylate water reducer. Background technique [0002] As we all know, the polycarboxylate high-performance water reducer has the advantages of low dosage, good dispersibility, high water reducing rate, strong slump retention, low shrinkage rate, no "three wastes" in the production process, and environmental protection. widely concerned by people. In recent years, polycarboxylate high-performance water reducers have been widely used in major national key projects and played an important role. At present, it is developing rapidly, the market demand has increased dramatically, and there is a lot of room for development. Polycarboxylate-based high-performance water reducers have become an inevitable trend of research and development in the 21st century. However, due to my country's vast territory,...

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): C08F283/06C08F220/06C08F216/14C08F222/16C08F220/28C08F4/40C08F2/38C04B24/16C04B103/30
Inventor 马国栋谢红靳通收王文彬骆志超陈占虎李茜茜李红双
Owner HEBEI SANKAISHENFA SCI & TECH CORP LTD
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