Supercharge Your Innovation With Domain-Expert AI Agents!

Water-retaining agent for improving concrete state and preparation method thereof

A water-retaining agent and concrete technology, which is applied in the field of improving concrete state-type water-retaining agent and its preparation, and achieves the effects of high conversion rate, stable storage, and adjustable and controllable process.

Active Publication Date: 2019-12-24
江苏博思通新材料有限公司
View PDF8 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The concrete thickener prepared by this invention is resistant to segregation under the premise of high water retention, which ensures the slump retention of concrete, but the linear copolymerization product of free radical polymerization cannot play a steric hindrance effect in cement particles

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
  • Water-retaining agent for improving concrete state and preparation method thereof
  • Water-retaining agent for improving concrete state and preparation method thereof
  • Water-retaining agent for improving concrete state and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Preparation of polyacrylamide comb-shaped polymer compound: Add 5g of isopentenyl polyethylene glycol ether into the reaction kettle, raise the temperature to 50°C, add 1g of azobisisobutyronitrile, and start to drop 100g of trimethylhydroxyl A mixture of ethylsilane, 10g of acrylamide and 0.2g of mercaptoacetic acid. The dripping time of bulk copolymerization at 50° C. is 3 hours, and after the reaction is completed, a polyacrylamide comb-shaped polymer compound with a weight average molecular weight of 20w is obtained.

[0019] Preparation of water-retaining agent: 300g of polyacrylamide comb-type polymer compound with a weight average molecular weight of 20w and 5g of amino acid are placed at the bottom of the kettle, the temperature is raised to 50°C, and then 230g of hydroxypropyl-β-cyclodextrin and 465g of water are added dropwise The aqueous solution can be obtained by adding dropwise and stirring for 5h.

Embodiment 2

[0021] Preparation of polyacrylamide comb-shaped polymer compound: Add 6g of isopentenyl polyoxyethylene polyoxypropylene ether into the reaction kettle, raise the temperature to 55°C, add 2g of azobisisobutyronitrile, and start to drop 100g of methyl A mixed solution of diphenyl hydroxyethyl silane, 10 g of methacrylamide and 0.4 g of mercaptopropionic acid. The dropping time is 4 hours through bulk copolymerization at a temperature of 55° C. After the reaction is completed, a polyacrylamide comb-shaped polymer compound with a weight average molecular weight of 10w is obtained.

[0022] Preparation of water-retaining agent: 400g of polyacrylamide comb-type polymer compound with a weight average molecular weight of 10w and 8g of betaine are placed at the bottom of the kettle, the temperature is raised to 50°C, and then 130g of hydroxypropyl-β-cyclodextrin and water are added dropwise 462g of aqueous solution can be obtained by adding dropwise and stirring for 4h.

Embodiment 3

[0024] Preparation of polyacrylamide comb-shaped polymer compound: Add 7g of isopentenyl polyoxyethylene polyoxypropylene ether into the reaction kettle, raise the temperature to 60°C, add 1.3g of azobisisoheptanonitrile, and then start to drop 100g of isoheptanonitrile A mixed solution of butyltrimethoxysilane, 15g of N-tert-butylacrylamide and 0.3g of mercaptoethanol. The dripping time of bulk copolymerization at 60° C. is 5 hours, and after the reaction is completed, a polyacrylamide comb-shaped polymer compound with a weight average molecular weight of 12w is obtained.

[0025] Preparation of water-retaining agent: put 362g of polyacrylamide comb-shaped polymer compound with a weight average molecular weight of 12w and 2g of amino acid at the bottom of the kettle, raise the temperature to 60°C, and then add dropwise an aqueous solution of 200g of α-monohydroxycyclodextrin and 400g of water , Added dropwise and stirred for 6h.

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
Weight average molecular weightaaaaaaaaaa
Login to View More

Abstract

The invention relates to a water-retaining agent for improving a concrete state and a preparation method thereof. The water-retaining agent is prepared from the raw material comprising, by mass, 30%-40% of polyacrylamide comb-type high-molecular compound, 13%-23% of cyclodextrin hydroxyl derivative, 0.2%-0.8% of emulsifier and 40%-65% of water. According to the invention, the silane monomer, the amide monomer and the polyether macromonomer are copolymerized into the comb-type high-molecular compound in bulk polymerization, so that the comb-type high-molecular compound has the advantages of tackifying property and water-retaining property, and is suitable for inhibiting the bleeding phenomenon of concrete and improving the wrapping state of concrete.

Description

technical field [0001] The invention belongs to the technical protection field of building materials, and in particular relates to a concrete state-improving water-retaining agent and a preparation method thereof. Background technique [0002] With the widespread use of admixtures, especially the C30-C40 strength grade concrete commonly used in mixing plants, the water ash is relatively large, and the concrete is prone to segregation and bleeding, which affects the strength drop and cannot guarantee the quality of the project. At present, several types of thickeners such as polyacrylamide, cellulose, polyacrylic acid and biological glue are mostly used to improve the wrapping state such as segregation and bleeding. However, its molecular weight is too high and its dosage is sensitive, which will easily lead to the decline of the delayed slump performance of concrete. Existing concrete viscosity regulators such as cellulose ethers have a slow dissolution rate, and while redu...

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): C04B24/42C08F283/06C08F220/56C08F220/54C08G77/46C04B103/46
CPCC04B40/0039C08F283/065C08G77/46C04B2103/465C08F220/56C08F220/54C04B24/383C04B24/42C04B24/123C04B24/121
Inventor 仇影胡凯伟刘子毅倪锐沈学涛于浩
Owner 江苏博思通新材料有限公司
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com