High-performance polycarboxylic acid water reducing agent and preparation method thereof

A high-performance, water-reducing agent technology, applied in the field of chemical building materials and construction, can solve the problems of poor product slump retention, increase production costs, and be difficult to control, improve water-reducing rate and adaptability, save production costs, The effect of increasing conversion rates

Inactive Publication Date: 2013-11-27
KZJ NEW MATERIALS GROUP CO LTD
View PDF3 Cites 63 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its defect is: the heating temperature of this method is higher, and energy consumption is bigger, has increased production cost
Its disadvantages are: the water reducer synthesized by this method needs to be fed with nitrogen, the reaction temperature is high and not easy to control, it also increases the production cost, and the product has poor slump retention effect

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 1

[0025] A preparation method of polycarboxylate high-performance water reducer, comprising the following steps:

[0026] 1. Copolymerization reaction: Add 200.00g of 2-methallyl polyoxyethylene ether HPEG and 134.00g of water into the reactor, start stirring, wait until all are dissolved, stir evenly, the temperature is 35~40°C, directly add peroxide Hydrogen 1.70g, stirred for 10min, started to drop ammonium persulfate aqueous solution (ammonium persulfate 1.80g, water 15.00g), ascorbic acid, thioglycolic acid mixed aqueous solution (ascorbic acid 0.30g, thioglycolic acid 0.70g, water 35.00g) and Acrylic acid, methacrylic acid, isooctyl acrylate mixed aqueous solution (acrylic acid 18.00g, methacrylic acid 6.00g, isooctyl acrylate 3.00g, water 30.00g), reacted for 3h to obtain a copolymerization product.

[0027] 2. Neutralization reaction: adjust the pH to 7-8 with sodium hydroxide to obtain a polycarboxylic acid high-performance water reducer.

Embodiment 2

[0029] A preparation method of polycarboxylate high-performance water reducer, comprising the following steps:

[0030] 1. Copolymerization reaction: Add 180.00g of 3-methyl-3-butene-1-polyoxyethylene ether TPEG TPEG and 130.00g of water into the reactor, start stirring, wait for all to dissolve, stir evenly, the temperature is 10~20 ℃, directly add 1.80g of hydrogen peroxide, stir for 10min, start to drop the mixed aqueous solution of ammonium persulfate and potassium persulfate (ammonium persulfate 0.70g, potassium persulfate 0.50g, water 15.00g), mix ascorbic acid and thioglycolic acid Aqueous solution (including ascorbic acid 0.16g, thioglycolic acid 1.2g, water 35.00g) and acrylic acid, maleic anhydride, isooctyl methacrylate mixed aqueous solution (including acrylic acid 10.00g, maleic anhydride 7.00g, isooctyl methacrylate 5.00g g, water 30.00g), after reacting for 3h, the copolymerized product was obtained.

[0031] 2. Neutralization reaction: adjust the pH to 7-8 wit...

Embodiment 3

[0033] A preparation method of polycarboxylate high-performance water reducer, comprising the following steps:

[0034] 1. Copolymerization reaction: Add 250.00g of allyl polyoxyethylene ether APEG and 140.00g of water into the reactor, start stirring, wait until all are dissolved, stir evenly, the temperature is 20~30°C, directly add 2.00g of hydrogen peroxide , stirred for 10 minutes, and began to add dropwise ammonium persulfate, sodium persulfate mixed aqueous solution (ammonium persulfate 1.20g, sodium persulfate 0.80g, water 15.00g), ascorbic acid, diacid, thioglycolic acid mixed aqueous solution (including ascorbic acid 0.25 g, hanging white block 0.10g, thioglycolic acid 1.00g, water 35.00g) and acrylic acid, itaconic acid, isooctyl acrylate mixed aqueous solution (including acrylic acid 21.00g, itaconic acid 2.00g, isooctyl methacrylate 2.00g , water 30.00g), after reacting for 3h, the copolymerization product was obtained.

[0035] 2. Neutralization reaction: adjust...

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 a high-performance polycarboxylic acid water reducing agent. The preparation method of the high-performance polycarboxylic acid water reducing agent comprises the following steps of: adding an unsaturated polyether macromonomer A and water into a reactor, uniformly stirring and dissolving, and then adding an initiator F hydrogen peroxide; then respectively dropwise adding unsaturated carboxylic acid or an unsaturated carboxylic acid anhydride small monomer B, an unsaturated carboxylate ester small monomer C, an aqueous solution of an initiator D, an aqueous solution of an initiator E and an aqueous solution of a molecular weight regulator, and carrying out reaction for 3-5 hours at the room temperature of 10-40 DEG C, so as to obtain a copolymerization product; carrying out a neutralization reaction, namely regulating the pH value of the copolymerization production to be 6-7 by adopting sodium hydroxide, so as to obtain the high-performance polycarboxylic acid water reducing agent. The invention also discloses a high-performance polycarboxylic acid water reducing agent prepared by adopting the preparation method. By controlling a material adding manner, two initiators are compounded, initiated and synthesized to form the high-performance polycarboxylic acid water reducing agent, the synthesized high-performance polycarboxylic acid water reducing agent is environmentally-friendly, pollution-free and high in reaction conversion ratio, and concrete doped with the high-performance polycarboxylic acid water reducing agent has better water reducing property, slump loss resistant property, dispersibility and workability.

Description

Technical field [0001] The present invention is a technical field of chemical building materials buildings, and especially involves a polycarboxylic acid high -performance water reduction agent and its preparation method. Background technique [0002] Polyether polycarboxylic acid water reduction agent has a high water reducing rate and collapse capacity, and its applications are becoming more and more extensive.In existing technologies, a variety of polycar carboxylic acid reduction agents with different molecular structures and performance characteristics appear, but there are not strong adaptability to certain cement, and concrete with high mud content and high stone powder content.Insufficient defects such as collapse performance. At the same time, due to high water reduction rate, water secretion is also prone to occur, especially in the concrete ratio of low and medium labels. [0003] The public number CN101530760A is publicly aggregated for 3 to 5 hours to synthesize a hi...

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): C08F283/06C08F220/18C08F220/28C08F220/14C08F4/40C04B24/26C04B103/30
Inventor 官梦芹蒋卓君方云辉陈小路苏晋升林艳梅郭毅伟
Owner KZJ NEW MATERIALS GROUP CO LTD
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