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

A kind of cross-linked early-strength carboxylic acid water reducing agent, its preparation method and application

A technology of early-strength polycarboxylic acid and water-reducing agent, which is applied in the field of concrete water-reducing agent, can solve the problems of easy bleeding and slump of concrete, difficulty in esterification and transesterification, complex process, etc., and achieve significant economic effects, The effect of low cost and simple preparation process

Active Publication Date: 2022-07-08
德州中科新材料有限公司
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, some early-strength polycarboxylate superplasticizers have been used in the production of concrete prefabricated components and require the preparation of early-strength concrete, but in the preparation process, esterification and transesterification are difficult, the process is complicated and the cost is high. Problems such as easy bleeding and rapid loss of slump

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 cross-linked early-strength carboxylic acid water reducing agent, its preparation method and application
  • A kind of cross-linked early-strength carboxylic acid water reducing agent, its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0058] Another embodiment of the present invention provides a preparation method of a cross-linked early-strength polycarboxylate water-reducing agent, comprising the following steps:

[0059] Step 102, adding a certain amount of unsaturated monocarboxylic acid monomers to a certain amount of pure water, stirring evenly, to obtain a homogeneous solution A;

[0060] Step 104, adding a certain amount of molecular weight regulator and reducing agent into a certain amount of pure water, stirring evenly, to obtain a homogeneous solution B;

[0061] Step 106, adding a certain amount of alkenyl polyoxyethylene ether into a certain amount of pure water, and adding a certain amount of unsaturated dicarboxylic acid monomer, stirring until dissolved, adding a certain amount of initiator at a certain temperature, Stir the reaction for a period of time;

[0062] In step 108, the homogeneous solution A and the homogeneous solution B are simultaneously added dropwise to the mixed solution o...

Embodiment 1

[0075] This embodiment provides a cross-linked early-strength polycarboxylate water reducer, which is prepared from the following components: 100 parts by weight of HPEG with a molecular weight of 3000, 6.8 parts by weight of acrylic acid, 1.2 parts by weight of maleic anhydride, 0.6 parts by weight of hydrogen peroxide with a concentration of 27.5%, 2 parts by weight of sodium methacrylate sulfonate, 0.6 part by weight of VC, and 1 part by weight of polyaluminum.

[0076] The cross-linked early-strength polycarboxylate water-reducing agent of the present embodiment is prepared by the following steps:

[0077] (1) the acrylic acid of 6.8 weight parts is added into the pure water of 2 times of weight, stir, obtain homogeneous solution A;

[0078] (2) 2 weight parts of sodium methacrylate and 0.6 weight part of VC are added into the pure water of 20 times of weight, stirred to obtain homogeneous solution B;

[0079] (3) 100 parts by weight of HPEG is added to the pure water of ...

Embodiment 2

[0083] This embodiment provides a cross-linked early-strength polycarboxylate water reducer, which is prepared from the following components: 100 parts by weight of TPEG with a molecular weight of 4000, 5.8 parts by weight of acrylic acid, 1.1 parts by weight of maleic anhydride, 0.8 part by weight of ammonium sulfate, 4 parts by weight of sodium methacrylate sulfonate, 0.3 part by weight of VC, and 0.5 part by weight of polyaziridine.

[0084] The cross-linked early-strength polycarboxylate water-reducing agent of the present embodiment is prepared by the following steps:

[0085] (1) adding the acrylic acid of 5.8 parts by weight to the pure water of 2 times the weight, stirring to obtain a homogeneous solution A;

[0086] (2) 4 weight parts of sodium methacrylate and 0.3 weight parts of VC are added into the pure water of 20 times of weight, stirred to obtain homogeneous solution B;

[0087] (3) 100 parts by weight of TPEG are added to 0.78 times of pure water by weight, 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 cross-linked early-strength carboxylic acid water reducer, a preparation method and application thereof. Wherein, the cross-linked early-strength polycarboxylate water reducer is prepared from a variety of components, the components include alkenyl polyoxyethylene ether, unsaturated carboxylic acid monomer, molecular weight regulator, initiator, A reducing agent and a carboxyl crosslinking agent, wherein the mass ratio of the carboxyl crosslinking agent to the alkenyl polyoxyethylene ether is 0.5-1.5:100. The cross-linked early-strength polycarboxylate water-reducing agent of the invention has the functions of high water-reducing rate, inhibiting bleeding, slow-release and slump protection in a short time, coagulation-promoting and early-strength promotion, and the like, and the preparation process is simple, the cost is low, and the environmental protection and energy saving .

Description

technical field [0001] The invention relates to the field of concrete water reducers, in particular to a cross-linked early-strength carboxylic acid water reducer, a preparation method and applications thereof. Background technique [0002] Generally, the early strength of concrete is mainly improved by increasing the degree of early hydration of cement. The polycarboxylate superplasticizer has the advantages of high water reduction rate, good workability of concrete and small slump loss, low chloride ion and alkali content, small shrinkage of concrete, and the production and application process is environmentally friendly and harmless to human body. Therefore, it is favored by the industry. In the prior art, the early strength of concrete is improved by compounding an early strength agent in a polycarboxylate superplasticizer, but there are certain problems in the current application of the early strength agent. Contains Cl - And alkali, it is easy to cause problems such...

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): C08F283/06C08F220/06C08F222/06C08F2/38C08F4/40C08J3/24C04B24/26C04B103/30
CPCC08F283/065C08F2/38C08F4/40C08J3/246C04B24/2694C04B2103/302C08J2351/08C08F220/06C08F222/06Y02W30/91
Inventor 曹玉林王金虎孟祥振于小雷李延华
Owner 德州中科新材料有限公司
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