Method for synthesizing solid polycarboxylic acid water reducing agent

A technology of polycarboxylic acid and water reducing agent, applied in the field of synthesizing solid polycarboxylic acid water reducing agent, can solve the problems of poor concentration effect and poor product performance, and achieve the effects of easy drying, superior performance and high solid content

Inactive Publication Date: 2012-03-14
SHANGHAI TAIJIE CHEM
View PDF3 Cites 23 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention provides a method for synthesizing a solid polycarboxylate water reducer, the purpose of which is to prepare a new solid polycarboxylate water reducer to overcome the poor concentration effect of solid polycarboxylate agents on the market and poor product performance and other defects

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0025] Raw materials: isobutyl alcohol polyoxyethylene (65) ether; acrylic acid; solvent: isobutanol; benzene;

[0026] Initiator: benzoyl peroxide; chain transfer agent: mercaptopropionic acid; octyl mercaptan;

[0027] Neutralizing reagent: sodium hydroxide;

[0028] Step 1: Add 120 parts of isobutanol, 120 parts of benzene, and 226 parts of isobutenol polyoxyethylene (65) ether to a flask equipped with a stirring and heating device, raise the temperature to 70°C, and add 1 part of benzoyl peroxide.

[0029] Dissolve 20 parts of acrylic acid in 22 parts of isobutanol and mix to make material A; dissolve 0.3 parts of mercaptopropionic acid and 0.2 parts of octyl mercaptan in 45 parts of isobutanol to make material B. Add material A and material B dropwise to the above-mentioned flask at the same time, control material A to drop in 3 hours, and material B to drop in 3.5 hours. After the dropwise addition was completed, the material was matured for 1 hour.

[0030] Step 2: A...

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 provides a method for synthesizing a solid polycarboxylic water reducing agent, comprising the following steps: using a monomer containing the nonsaturated group to react with an organic solvent, after the reaction, adding an alkaline substance for neutralization, and carrying out centrifugation to obtain a polycarboxylic acid water reducer, then drying the prepared polycarboxylic acid water reducer to obtain the solid polycarboxylic acid water reducing agent. By using a low temperature method to prepare the solid polycarboxylic acid water reducing agent , the crosslinking of the polycarboxylic acid water reducer due to high temperature spray drying is avoided, and the structure of the polycarboxylic acid water reducer is destroyed, thus the solid polycarboxylic acid water reducing agent with excellent performance is obtained.

Description

technical field [0001] The invention relates to a production method of a concrete admixture, in particular to a method for synthesizing a solid polycarboxylate water reducer. Background technique [0002] Water reducer has become an indispensable fifth component in concrete, and more and more attention has been paid to it. Polycarboxylate superplasticizer is a kind of superplasticizer with better comprehensive performance. Its high water reducing rate and good slump retention are beyond the reach of previous naphthalene or aliphatic water reducers. of. Now polycarboxylate superplasticizers are mostly 10-50% liquid products. Due to their superior performance, they are more and more used in various key projects. However, sometimes the construction site is far away, resulting in continuous increase in transportation costs, so the development of high-concentration or solid polycarboxylate products is the primary condition for reducing transportation costs and promoting the wid...

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 Applications(China)
IPC IPC(8): C08F290/06C08F8/00C04B24/26C04B103/30
Inventor 方剑
Owner SHANGHAI TAIJIE CHEM
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap