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

A kind of crotonic acid copolymer dispersant and its preparation method and application

A kind of copolymer and crotonic acid technology, applied in the direction of coating, etc., can solve the problems that the coating is easily affected by the solvent, the environmental protection performance of the coating is reduced, and the dispersion effect is not very good, so as to save time and raw materials, not easy to settle, and reduce synthesis The effect of steps

Active Publication Date: 2015-08-05
GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] To sum up, there are few studies on nano-silica dispersants, and the existing nano-silica dispersants are not very effective in dispersing, easy to settle, and the preparation method is not simple enough. Solvents, coatings are easily affected by solvents, and coatings containing a large amount of solvents reduce their environmental performance

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 crotonic acid copolymer dispersant and its preparation method and application
  • A kind of crotonic acid copolymer dispersant and its preparation method and application
  • A kind of crotonic acid copolymer dispersant and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A preparation method of crotonic acid copolymer dispersant, comprising the following steps:

[0040] (1) In a 250mL four-neck flask equipped with a stirrer, dropping funnel, thermometer and reflux condenser, add 1.1 parts of crotonic acid, 1 part of sodium methacrylate and 0.04 parts of sodium bisulfite, add distilled water for 20 part, then stirred and dissolved to obtain a mixed solution;

[0041] (2) Heat the mixed solution to 75°C; then slowly add dropwise an aqueous solution containing 0.15 parts of ammonium persulfate at a rate of 1 drop / second, and complete the dropwise addition within half an hour, then keep warm for 3 hours and then stop the reaction to obtain a polymer ;

[0042] (3) Cool the polymer to 40°C; slowly add NaOH solution with a mass fraction of 30% dropwise to make the pH of the system 8-9, and finally obtain a light yellow transparent liquid, namely the crotonic acid copolymer dispersant A.

[0043] attached figure 1 For the infrared spectrum ...

Embodiment 2

[0045] A preparation method of crotonic acid copolymer dispersant, comprising the following steps:

[0046] (1) In a 250mL four-neck flask equipped with a stirrer, dropping funnel, thermometer and reflux condenser, add 2.2 parts of crotonic acid, 1.5 parts of sodium methacrylate and 0.06 parts of sodium bisulfite, add distilled water for 25 part, then stirred and dissolved to obtain a mixed solution;

[0047] (2) Heat the mixed solution to 85°C; then slowly add ammonium persulfate (0.2 parts) aqueous solution dropwise at a rate of 1 drop / second, the dropwise addition is completed within half an hour, and then keep warm for 3.5 hours to stop the reaction to obtain polymerization thing;

[0048] (3) Cool the polymer to 50°C; slowly add NaOH solution with a mass fraction of 30% dropwise to make the pH of the system 8-9, and finally obtain a light yellow transparent liquid, that is, crotonic acid copolymer dispersant B.

[0049] The obtained product infrared spectrum data is as ...

Embodiment 3

[0051] A preparation method of crotonic acid copolymer dispersant, comprising the following steps:

[0052] (1) In a 250mL four-neck flask equipped with a stirrer, dropping funnel, thermometer and reflux condenser, add 3.3 parts of crotonic acid, 2 parts of sodium methacrylate and 0.08 parts of sodium bisulfite, add distilled water for 30 part, then stirred and dissolved to obtain a mixed solution;

[0053] (2) Heat the mixture to 80°C; then slowly add ammonium persulfate (0.25 parts) aqueous solution dropwise, the speed is controlled at 1 drop / second, and the dropwise addition is completed within half an hour, and then keep warm for 2.5 hours to stop the reaction to obtain polymerization thing;

[0054] (3) Cool the polymer to 50°C; slowly add NaOH solution with a mass fraction of 30% dropwise to make the pH of the system 8-9, and finally obtain a light yellow transparent liquid, that is, crotonic acid copolymer dispersant C.

[0055] The obtained product infrared spectrum ...

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
quality scoreaaaaaaaaaa
Login to View More

Abstract

The invention discloses a dispersing agent of crotonic copolymers as well as a preparation method and an application thereof. The preparation method comprises the following steps: mixing crotonic acid, methyl sodium sulfonate acrylate and a chain transfer agent; then, adding water to stir and dissolve to obtain mixed liquor; heating the mixed liquor to 75 DEG C-85 DEG C, then, adding initiator aqueous liquor, preserving the heat for reacting for 2 hours-3 hours to obtain a polymer; cooling the polymer to 40 DEG C-50 DEG C, then, adding alkali compound aqueous liquor to adjust pH value of the system to 8-9 to obtain the dispersing agent of crotonic copolymers. The dispersing agent of crotonic copolymers disclosed by the invention is simple in synthesis step, so that complex synthesis steps are reduced, time and materials are saved. The dispersing agent of crotonic copolymers disclosed by the invention is quick in dispersing velocity and high in dispersing efficiency, so that nano silicon dioxide is uniformly dispersed in aqueous liquor without being easily settled, and therefore, the dispersing agent can be stood for two months without generating precipitates, and is beneficial to later-period utilization of mixed liquor.

Description

technical field [0001] The invention belongs to the field of paint pigment additives, in particular to a crotonic acid copolymer dispersant and its preparation method and application. Background technique [0002] There are two types of dispersants: traditional dispersants and new dispersants. Traditional dispersants include: fatty acids, aliphatic amides and esters, paraffins, metal soaps, molecular waxes (such as polyethylene, polypropylene, polyphenylene, etc.) vinyl), etc. A typical representative of a new type of dispersant is a hyperdispersant, a special surfactant whose molecular structure contains two groups opposite in polarity and solubility, one of which is a hydrophilic group, making it easy to align On the material surface or two-phase interface, the interfacial tension is reduced, and it has a better dispersion effect on the aqueous dispersion system. [0003] Hyperdispersants overcome some of the limitations of traditional dispersants. Compared with traditi...

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): C09D7/12C08F220/06C08F228/02C08F2/38
Inventor 王斌严杰刘化珍谢义鹏
Owner GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI
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