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

Hyperbranched glucoside polycarboxylate superplasticizer and preparation method and application thereof

A technology of chain glycoside polycarboxylic acid and water reducing agent, which is applied in the field of hyperbranched polycarboxylic acid water reducing agent, can solve the problems of concrete bleeding and segregation, various types of cement, poor adaptability of cement, etc. The effect of high water reduction rate and strong adaptability

Active Publication Date: 2016-07-20
GNSG ANHUI HONG SIFANG
View PDF4 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the variety of cement varieties in our country, there are obvious regional differences. Therefore, in actual engineering applications, polycarboxylate water reducers show poor adaptability to cement, and concrete bleeding and segregation often occur in engineering. and other phenomena

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
  • Hyperbranched glucoside polycarboxylate superplasticizer and preparation method and application thereof
  • Hyperbranched glucoside polycarboxylate superplasticizer and preparation method and application thereof
  • Hyperbranched glucoside polycarboxylate superplasticizer and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] 1. Add a certain amount of methyl methacrylate (MMA) and polyethylene glycol monomethyl ether (MPEG) with a molar ratio of 3:1 into the three-necked flask of the reaction vessel, use cyclohexane as the reaction solvent, and the catalyst as tert-butyl Lithium alkoxide (the dosage is 1% of the molar weight of methyl methacrylate) and polymerization inhibitor phenothiazine (the dosage is 0.1% of the molar weight of methyl methacrylate), under the condition of 70~80℃ and air The reaction was carried out with constant stirring. After 4-5 hours of reaction, the mixed system after the reaction is distilled off under reduced pressure to remove the reaction solvent and unreacted MMA to obtain the macromonomer MAMPEG.

[0038] The infrared absorption spectrum of MAMPEG is as follows figure 1 shown, from figure 1 As can be seen in the 1644cm -1 The place is the stretching vibration peak of olefinic double bond C=C; 945cm -1 is the out-of-plane bending vibration absorption peak...

Embodiment 2

[0046] 1. Add a certain amount of methyl methacrylate (MMA) and polyethylene glycol monomethyl ether (MPEG) with a molar ratio of 3:1 into the three-necked flask of the reaction vessel, use cyclohexane as the reaction solvent, and the catalyst as tert-butyl Lithium alkoxide (the dosage is 1% of the molar weight of methyl methacrylate) and polymerization inhibitor phenothiazine (the dosage is 0.1% of the molar weight of methyl methacrylate), under the condition of 70~80℃ and air The reaction was carried out with constant stirring. React for 4 to 5 hours. After the reaction, the mixed system is distilled under reduced pressure to remove the reaction solvent and unreacted MMA, and the macromonomer MAMPEG is obtained;

[0047] 2. Add a certain amount of glycoside (GC) and solvent N,N'-dimethylformamide (DMF) into the three-necked flask of the reaction vessel, and slowly dissolve the excess acryloyl chloride dissolved in DMF under the condition of an ice-water bath. Add it dropwis...

Embodiment 3

[0051] 1. Add a certain amount of methyl methacrylate (MMA) and polyethylene glycol monomethyl ether (MPEG) with a molar ratio of 3:1 into the three-necked flask of the reaction vessel, use cyclohexane as the reaction solvent, and the catalyst as tert-butyl Lithium alkoxide (the dosage is 1% of the molar weight of methyl methacrylate) and polymerization inhibitor phenothiazine (the dosage is 0.1% of the molar weight of methyl methacrylate), under the condition of 70~80℃ and air The reaction was carried out with constant stirring. React for 4 to 5 hours. After the reaction, the mixed system is distilled under reduced pressure to remove the reaction solvent and unreacted MMA, and the macromonomer MAMPEG is obtained;

[0052] 2. Add a certain amount of glycoside (GC) and solvent N,N'-dimethylformamide (DMF) into the three-necked flask of the reaction vessel, and slowly dissolve the excess acryloyl chloride dissolved in DMF under the condition of an ice-water bath. Add it dropwis...

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
Compressive strengthaaaaaaaaaa
Login to View More

Abstract

The invention relates to a polycarboxylate superplasticizer and particularly discloses a hyperbranched glucoside polycarboxylate superplasticizer. The hyperbranched glucoside polycarboxylate superplasticizer is a star polymer with natural polyhydroxylated compound glucoside serving as a nucleus and polycarboxylate linear macromolecules serving as arms. Due to less molecular entanglement and a great quantity of hydrophilic groups and high branching of a molecular structure of the hyperbranched glucoside polycarboxylate superplasticizer, solubility, cement dispersion action and cement adaptability of the hyperbranched glucoside polycarboxylate superplasticizer are greatly enhanced. In addition, the hyperbranched glucoside polycarboxylate superplasticizer is high in water reducing rate, high in cement adaptability and high in cement paste fluidity and well meets the requirement of high-performance concrete workability.

Description

technical field [0001] The invention relates to a polycarboxylate water reducer, in particular to a hyperbranched polycarboxylate water reducer. Background technique [0002] At present, polycarboxylate superplasticizers are most widely used in engineering in my country, mainly because polycarboxylate superplasticizers can design their molecular structure according to the mechanism of action of cement. The polycarboxylate superplasticizer has very good dispersibility and can achieve a high plasticizing effect at a low dosage. The concrete mixed with the polycarboxylate superplasticizer has good fluidity retention, Excellent workability and durability, and wide adaptability to cement. However, due to the variety of cement varieties in our country, there are obvious regional differences. Therefore, in actual engineering applications, polycarboxylate water reducers show poor adaptability to cement, and concrete bleeding and segregation often occur in engineering. And so on. ...

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): C08F290/14C08F222/14C08F220/06C08F228/02C04B24/16C04B103/30
CPCC04B24/165C04B2103/302C08F290/142C08F222/14C08F220/06C08F228/02
Inventor 宋跃锋谢中平宋红曹宗元盛锡明李秀玲
Owner GNSG ANHUI HONG SIFANG
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