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

Preparation method of cathode electrophoretic coating

A cathodic electrophoretic paint and technology for preparation steps, applied in electrophoretic paints, coatings and other directions, can solve the problems of poor adhesion and corrosion resistance, poor stability and leveling, and reduced coulombic efficiency of paint films, and achieve adhesion. And the effect of good corrosion resistance, good stability and high penetration rate

Inactive Publication Date: 2016-05-25
CHANGZHOU C PE PHOTO ELECTRICITY SCI & TECHN
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention: in view of the low penetration rate of cathodic electrophoretic coating, poor bath stability and leveling at 30°C, uneven electrophoretic coating film, resulting in reduced Coulombic efficiency of the paint film, and adhesion of the paint film Focusing on the drawbacks of poor corrosion resistance, a method is provided by taking epichlorohydrin, mixing it with aqueous dimethylamine solution dropwise, adding acrylic acid and alcohols for a mixed reaction after the oscillation reaction, and then reacting with the action of the initiator potassium persulfate Under the conditions, after stirring reaction and aging, and then mixing with organic solvents to prepare cathodic electrophoretic coatings, in order to achieve the purpose of improving the penetration rate and the coulombic efficiency of the paint film after use

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

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0018] First measure 220mL of epichlorohydrin into a Erlenmeyer flask with a stirrer and a thermometer, use an ice-water bath to reduce the temperature of the reactants in the Erlenmeyer flask to 5°C, and the speed is 200r / min, and then pour them into the reaction vessel while stirring. The mass concentration of dropping is 30% dimethylamine aqueous solution, the dropping amount is 1% of the mass of epichlorohydrin, and the dropping speed is controlled to be 2 drops / s. After the shaking reaction is completed, add 100mL of acrylic acid, 30g of trityl alcohol and 35mL of prenyl alcohol to the Erlenmeyer flask, stir for 50min at a temperature of 40°C and a rotation speed of 300r / min, and place in a 300W ultrasonic dispersion Ultrasonic dispersion treatment was carried out in the container for 1 hour to make it completely mixed uniformly; after the above-mentioned ultrasonic dispersion treatment, it was stirred and heated to 60°C for a reaction time of 5 hours, and then 0.1% of acr...

example 2

[0021] First measure 260mL of epichlorohydrin into a Erlenmeyer flask with a stirrer and a thermometer, use an ice-water bath to reduce the temperature of the reactants in the Erlenmeyer flask to 7°C, and the speed is 230r / min, and then pour them into the reaction vessel while stirring. The dropping mass concentration is 35% dimethylamine aqueous solution, the dropping amount is 2% of the epichlorohydrin mass, and the controlled dropping speed is 3 drops / s. After the shaking reaction is completed, add 150mL of acrylic acid, 35g of trityl alcohol and 40mL of prenyl alcohol to the Erlenmeyer flask, stir for 55min at a temperature of 45°C and a rotation speed of 300r / min, and place in a 400W ultrasonic dispersion Ultrasonic dispersion treatment was carried out in the container for 2 hours to make it completely mixed uniformly; after the above-mentioned ultrasonic dispersion treatment, it was stirred and heated to 70°C for a reaction time of 6 hours, and then 0.3% acrylic acid mass...

example 3

[0024] First measure 300mL of epichlorohydrin into a Erlenmeyer flask with a stirrer and a thermometer, use an ice-water bath to lower the temperature of the reactants in the Erlenmeyer flask to 9°C, and the speed is 260r / min, and then pour them into the reaction vessel while stirring. The mass concentration of dripping is 40% dimethylamine aqueous solution, the amount of dripping is 3% of the mass of epichlorohydrin, and the rate of addition is controlled to be 3 drops / s. After the shaking reaction is completed, add 200mL of acrylic acid, 40g of trityl alcohol and 45mL of prenyl alcohol to the Erlenmeyer flask, stir for 60min at a temperature of 50°C and a rotation speed of 300r / min, and place in a 500W ultrasonic dispersion Ultrasonic dispersion treatment was carried out in the container for 2 hours to make it completely mixed uniformly; after the above ultrasonic dispersion treatment, it was stirred and heated to 80°C for a reaction time of 6 hours, and then 0.5% acrylic aci...

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
current efficiencyaaaaaaaaaa
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a preparation method of a cathode electrophoretic coating, belonging to the technical field of cathode electrophoretic coating preparation. The preparation method comprises the following steps: taking epoxy chloropropane and dropwise adding a dimethylamine aqueous solution and mixing; shaking for reactions; adding acrylic acid and an alcohol substance and mixing for reactions; under the effect of an initiator potassium persulfate, stirring for reactions and curing; and mixing with an organic solvent to obtain the cathode electrophoretic coating. The preparation method disclosed by the invention has the following beneficial effects that the preparation steps are simple, and the throwing rate of the product is high; after use, the electrophoretic film is uniform, and the stability of a bath solution is good at 30 DEG C; and moreover, the coulombic efficiency of the film is over 20% higher than that of other products while the adhesive ability and corrosion resistance are good.

Description

technical field [0001] The invention relates to a preparation method of cathodic electrophoretic paint, which belongs to the technical field of cathodic electrophoretic paint preparation. Background technique [0002] Cathodic electrophoretic paint is a two-component, one component is a white homogeneous milky liquid, and the other component is a gray (or black) pigment slurry. Its raw materials mainly include epoxy resin, ether alcohol compound, isocyanate and so on. Cathodic electrophoretic coatings include UV-curable electrophoretic coatings, self-layering cathodic electrophoretic coatings, and corner anti-rust cathodic electrophoretic coatings. UV curing coating is a curing method that uses ultraviolet light to irradiate the coating resin to undergo polymerization and bridging reactions. The curing process of the coating can be completed in a short time under low temperature conditions. Self-layering coating means that after the coating is applied on the substrate once...

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 Applications(China)
IPC IPC(8): C09D5/44C09D151/00C08F285/00C08F212/12C08F283/06C08F220/06C08F216/04C08G65/24
CPCC09D5/4488C08F283/06C08F285/00C08G65/24C09D5/4407C09D151/00
Inventor 陈蓉蓉盛艳花
Owner CHANGZHOU C PE PHOTO ELECTRICITY SCI & TECHN
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