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

A kind of plastic-preserving and anti-mud type dispersant and preparation method thereof

A dispersant and anti-mud type technology, applied in the field of dispersant and cement dispersant, can solve the problems of less than 1% anti-mud effect and poor plastic retention of products, and meet the requirements of construction environment, durable plastic retention performance, The effect of expanding the range of application

Inactive Publication Date: 2018-11-13
NANJING UNIV OF SCI & TECH
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the patent [CN201410492164] discloses a preparation method of an anti-mud type carboxylic acid superplasticizer, according to the content of the patent literature, the anti-mud effect detected is less than 1% (soil accounts for the mass percentage of cement), and its literature data It also shows that the product has poor plastic retention, and there is still a lot of room for improvement in the mud resistance and plastic retention of the product

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 plastic-preserving and anti-mud type dispersant and preparation method thereof
  • A kind of plastic-preserving and anti-mud type dispersant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The preparation of embodiment 1 dispersant

[0023] 1), amidated polyethyleneimine: 10 grams of acrylic acid and 100 grams of polyethyleneimine aqueous solution (molecular weight 3500, solid content 50%, polyethyleneimine macromonomer is prepared into aqueous solution in advance, the concentration of aqueous solution Little impact on the quality of the product of the present invention, can be appropriately controlled) and 0.2 gram of hydroquinone mixed and stirred evenly, reacted at 190 DEG C and simultaneously removed water vapor, reacted for 1 to 3 hours, cooled to obtain polymerizable macromonomer 1 . In order to improve the reactivity of later-stage products, the polymerizable macromonomer 1 can be diluted with water to form a 60% aqueous solution after cooling to below 98°C, and then used for later-stage polymerization;

[0024] 2), esterified polyethylene glycol monomethyl ether: add 0.33 gram of hydroquinone in 100 grams of molten polyethylene glycol monomethyl ...

Embodiment 2

[0026] The preparation of embodiment 2 dispersants

[0027] 1), amidated polyethyleneimine: 7.93 grams of methacrylic acid and 714 grams of polyethyleneimine aqueous solution (molecular weight 25000, solid content 50%) and 0.79 grams of hydroquinone were mixed and stirred evenly, at 130 ℃ React while removing water vapor, react for 1 to 3 hours, and cool to obtain the polymerizable macromonomer 1. In order to improve the reactivity of later-stage products, the polymerizable macromonomer 1 can be diluted with water to form a 60% aqueous solution after cooling to below 98°C, and then used for later-stage polymerization;

[0028] 2), esterified polyethylene glycol monomethyl ether: add 0.167 gram of hydroquinone in 100 grams of molten polyethylene glycol monomethyl ether (molecular weight 1000) and stir well, then slowly add 0.2 gram of concentrated sulfuric acid, stir After uniformity, add 10 grams of methacrylic acid and stir evenly. After the temperature was raised to 145°C,...

Embodiment 3

[0030] The preparation of embodiment 3 dispersants

[0031] 1), amidated polyethyleneimine: 6 grams of methacrylic acid and 300 grams of polyethyleneimine (molecular weight 15000, solid content 50%) and 0.43 grams of hydroquinone aqueous solution are mixed and stirred evenly, at 150 ℃ React while removing water vapor, react for 1 to 3 hours, and cool to obtain the polymerizable macromonomer 1. In order to improve the reactivity of later-stage products, the polymerizable macromonomer 1 can be diluted with water to form a 60% aqueous solution after cooling to below 98°C, and then used for later-stage polymerization;

[0032] 2), esterified polyethylene glycol monomethyl ether: add 0.222 gram of hydroquinone in 100 grams of molten polyethylene glycol monomethyl ether (molecular weight 2400) and stir evenly, then slowly add 0.333 gram of concentrated sulfuric acid, stir After uniformity, 16.67 grams of acrylic acid was added and stirred evenly. After the temperature was raised t...

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 present invention discloses a plasticity-retention and mud-resistance type dispersing agent and a preparation method thereof, wherein the main chain of the dispersing agent presents the comb-like structure of conventional carboxylic acid molecules, the side chain has a double structure comprising spherical ultra-branched molecules and long chain oxyethylene polyether, the spherical ultra-branched molecules provide a mud blocking packaging structure, and the long chain oxyethylene polyether and the esterification group of the main chain provide slow-release plasticity-retention property. According to the present invention, the dispersing agent has excellent plasticity retention property and has mud resistance of more than 8%.

Description

technical field [0001] The invention relates to a dispersant, in particular to a dispersant with both plastic retention and mud resistance properties and a preparation method thereof, belonging to the field of cement dispersants. Background technique [0002] Cement powder is easy to self-agglomerate due to its high surface energy, so its dispersion technology has become a key technical link in its application. The dispersants used in cement-based materials are usually called water reducers, and most of them are water-soluble polymers with a molecular weight of several thousand to tens of thousands. At present, the most excellent application performance in the market is polycarboxylate high-performance water reducer. The molecule of polycarboxylate dispersant has a comb structure, the main chain is a hydrophobic carbon chain, and the side chain is a hydrophilic carboxyl group and sulfonic acid group. , ester groups and long polyether chains, etc., the dispersion water reduc...

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): C04B24/32C08F299/02
Inventor 段国荣杨涛黄婷刘孝恒杨绪杰
Owner NANJING UNIV OF SCI & TECH
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