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

Polycarboxylic acid high-performance water reducing agent and preparation process thereof

A polycarboxylic acid, high-performance technology, applied in climate sustainability, sustainable waste treatment, solid waste management, etc., can solve the problems of poor concrete stability and high water-reducing efficiency of water-reducing agents

Inactive Publication Date: 2022-05-20
淮南市晋淮建化科技有限公司
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a polycarboxylate high-performance water-reducer and its preparation process, which solves the problem that the water-reducing efficiency of the water-reducer is too high at the present stage, resulting in poor stability of the prepared concrete

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
  • Polycarboxylic acid high-performance water reducing agent and preparation process thereof
  • Polycarboxylic acid high-performance water reducing agent and preparation process thereof
  • Polycarboxylic acid high-performance water reducing agent and preparation process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A polycarboxylic acid high-performance water reducer, comprising the following raw materials in parts by weight: 40 parts of modified polycarboxylic acid, 3 parts of sodium hydroxide, 8 parts of hydroxypropyl starch ether, 5 parts of glycerin, and 60 parts of water;

[0044] Modified polycarboxylic acid is made by following steps:

[0045] Mix methoxypolyoxyethylene ether and deionized water evenly, stir at a speed of 150r / min and a temperature of 40°C, and add modified resin, modified monomer, sodium methacrylate, Ammonium persulfate was raised to a temperature of 70° C., and after 3 hours of reaction, the pH value of the reaction solution was adjusted to be neutral, and the deionized water was distilled off to obtain a modified polycarboxylic acid.

[0046] Modified resin is made by the following steps:

[0047] Step B1: Dissolve p-hydroxystyrene in N,N-dimethylformamide, add sodium hydroxide and epichlorohydrin, and carry out the reaction for 1 hour at a rotation sp...

Embodiment 2

[0055] A polycarboxylic acid high-performance water reducer, comprising the following raw materials in parts by weight: 45 parts of modified polycarboxylic acid, 4 parts of sodium hydroxide, 9 parts of hydroxypropyl starch ether, 6 parts of glycerin, and 70 parts of water;

[0056] Modified polycarboxylic acid is made by following steps:

[0057] Mix methoxypolyoxyethylene ether and deionized water evenly, stir at a speed of 180r / min and a temperature of 45°C and add modified resin, modified monomer, sodium methacrylate, ammonium persulfate, the temperature was raised to 75° C., and after 4 hours of reaction, the pH of the reaction solution was adjusted to be neutral, and the deionized water was distilled off to obtain a modified polycarboxylic acid.

[0058] Modified resin is made by the following steps:

[0059] Step B1: Dissolve p-hydroxystyrene in N,N-dimethylformamide, add sodium hydroxide and epichlorohydrin, and react for 1.3 hours at a speed of 180r / min and a temperat...

Embodiment 3

[0067] A polycarboxylic acid high-performance water reducer, comprising the following raw materials in parts by weight: 50 parts of modified polycarboxylic acid, 5 parts of sodium hydroxide, 10 parts of hydroxypropyl starch ether, 8 parts of glycerin, and 80 parts of water;

[0068] Modified polycarboxylic acid is made by following steps:

[0069] Mix methoxypolyoxyethylene ether and deionized water evenly, stir at a speed of 200r / min and a temperature of 50°C, and add modified resin, modified monomer, sodium methacrylate, Ammonium persulfate was raised to a temperature of 80° C., and after 5 hours of reaction, the pH value of the reaction solution was adjusted to be neutral, and the deionized water was distilled off to obtain a modified polycarboxylic acid.

[0070] Modified resin is made by the following steps:

[0071] Step B1: Dissolve p-hydroxystyrene in N,N-dimethylformamide, add sodium hydroxide and epichlorohydrin, and react for 1.5 hours at a speed of 200r / min and 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

PropertyMeasurementUnit
Compressive strengthaaaaaaaaaa
Compressive strengthaaaaaaaaaa
Login to View More

Abstract

The invention discloses a polycarboxylic acid high-performance water reducing agent and a preparation process thereof. The water reducing agent comprises the following raw materials in parts by weight: 40-50 parts of modified polycarboxylic acid, 3-5 parts of sodium hydroxide, 8-10 parts of hydroxypropyl starch ether, 5-8 parts of glycerol and 60-80 parts of water. The water reducing agent is prepared by compounding modified polycarboxylic acid, sodium hydroxide, hydroxypropyl starch ether, glycerin and water, the water reducing agent has a certain water reducing rate, but the water reducing rate is not too high, the problem that concrete is poor in stability due to the too high water reducing rate is avoided, siloxane is contained on a molecular side chain of the modified polycarboxylic acid and is easily hydrolyzed into a silanol structure, and therefore the water reducing agent has a good water reducing effect. And meanwhile, the problems of dehydration and early solidification in the concrete pouring process are effectively avoided, the phenomenon of concrete collapse is not likely to occur, and the stability of the concrete is guaranteed.

Description

technical field [0001] The invention relates to the technical field of water reducer preparation, in particular to a polycarboxylic acid high-performance water reducer and a preparation process thereof. Background technique [0002] Concrete, as a building functional material, is made of cement, granular aggregates, water, mineral admixtures and chemical admixtures, mixed according to a certain proportion, because of its good durability and high compressive strength , low price, abundant raw materials and other advantages, it is widely used in civil engineering, geothermal development projects and other constructions; [0003] As an important component in cement concrete, chemical admixtures can significantly improve the strength, stability, durability and other properties of cement concrete by adding a small amount of them to cement concrete. At present, there are various chemical admixtures on the market. The common ones are early strength agent, retarder, air-entraining ...

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
IPC IPC(8): C08F291/08C08F228/02C04B24/26C04B103/30
CPCC08F291/08C04B24/2694C04B2103/302C08F228/02Y02W30/91
Inventor 井旭东潘培勤李卓潘胜虎
Owner 淮南市晋淮建化科技有限公司
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