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

Chromium-free insulating coating, electrical sheet material and preparation method thereof

A technology for insulating coatings and electrical steel, applied in the direction of epoxy resin coatings, coatings, and devices for coating liquid on the surface, etc., can solve problems such as poor performance, achieve excellent heat resistance, reduce curing temperature, and optimize process flow Effect

Inactive Publication Date: 2012-05-30
PANGANG GROUP VANADIUM TITANIUM & RESOURCES +3
View PDF6 Cites 15 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In order to overcome the defect that the chromium-free insulating coating used in the existing electrical steel has poor performance after curing at a lower curing temperature, the present invention provides a chromium-free insulating coating with better performance after curing at a lower temperature, and Electrical steel material containing the coating obtained by curing the chromium-free insulating coating and its preparation method

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
  • Chromium-free insulating coating, electrical sheet material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0036]According to the preparation method of the above-mentioned electrical steel material provided by the present invention, the electrical steel material includes an electrical steel substrate and a coating attached to the electrical steel substrate, the coating is a cured product of the above-mentioned chromium-free insulating coating, the The method includes: curing the chromium-free insulating paint on the electrical steel substrate, and the curing temperature is not higher than 250°C.

[0037] According to the preparation method of the above-mentioned electrical steel material provided by the present invention, in order to make the coating reach the above-mentioned thickness, the amount of the chromium-free insulating coating is 1.0-3.0 grams relative to the surface of the electrical steel substrate per square meter, preferably 1.5-2.5 grams.

[0038] According to the preparation method of the above-mentioned electrical steel material provided by the present invention, b...

Embodiment 1

[0048] Under stirring conditions, add 20kg of deionized water and 42kg of styrene-acrylic emulsion (purchased from Nantong Shengda, brand SD588, solid content of 48% by weight, viscosity of 500-1500mPa·s , particle size is 50-80nm), 33kg aluminum dihydrogen phosphate and 5kg silica sol (particle size is 20-30nm, as SiO 2 , the concentration is 30% by weight), and after stirring for 30 minutes, a uniform and stable dispersion system is obtained, which is the chrome-free insulating coating P1 of the present invention.

[0049] Clean the cold-rolled non-oriented electrical steel strip (50PW800 produced by Panzhihua Iron and Steel Group Co., Ltd.) with an alkaline degreasing cleaning solution at 55°C. The alkaline degreasing cleaning solution is PA50-A1 degreasing solution with a concentration of 15% by weight, and the consumption of the alkaline degreasing cleaning solution per square meter of steel strip is 30Kg. Then it is cleaned with a rinsing liquid, which is deionized wate...

Embodiment 2

[0052] Under stirring conditions, add 10Kg of deionized water and 69Kg of styrene-acrylic emulsion (purchased from Nantong Shengda, brand SD800, solid content of 48% by weight, viscosity of 500-1500mPa·s ), 20Kg calcium dihydrogen phosphate and 7Kg water glass (modulus is 2.5, with SiO 2 , the concentration is 30% by weight), and after stirring for 30 minutes, a uniform and stable dispersion system is obtained, which is the chrome-free insulating coating P2 of the present invention.

[0053] Clean the cold-rolled non-oriented electrical steel strip (50PW800 produced by Panzhihua Iron and Steel Group Co., Ltd.) with an alkaline degreasing cleaning solution at 55°C. The alkaline degreasing cleaning solution is PA50-A1 degreasing solution with a concentration of 15% by weight, and the consumption of the alkaline degreasing cleaning solution per square meter of steel strip is 30Kg. Then it is cleaned with a rinsing liquid, which is deionized water, and the amount of the rinsing l...

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
Conductivityaaaaaaaaaa
Viscosityaaaaaaaaaa
Particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention provides a chromium-free insulating coating which has better performance after being cured at a lower temperature, an electrical sheet material containing a coating obtained by curing the chromium-free insulating coating and a preparation method thereof. The chromium-free insulating coating is obtained by uniformly mixing a raw material mixture and is characterized in that the raw material mixture comprises a film forming material, dihydric phosphate, an inorganic filler and a solvent. The preparation method of the electrical sheet material comprises the following steps of: adhering the chromium-free insulating coating to an electrical sheet substrate and then curing the chromium-free insulating coating, wherein the curing temperature is not higher than 250 DEG C. The chromium-free insulating coating provided by the invention can be cured at a temperature of 200-250 DEG C, so that the chromium-free insulating coating can be cured by simpler curing equipment, thus the equipment investment is greatly saved, the process flow is easy to further plan and optimize, the equipment utilization rate and the production efficiency of a whole production line are improved, and the energy consumption is greatly reduced.

Description

technical field [0001] The invention relates to a chromium-free insulating paint, an electrical steel material and a preparation method of the electrical steel material. Background technique [0002] Electrical steel is mainly used as core material for electric motors and transformers. In order to reduce eddy current loss, it is necessary to attach an insulating coating to the surface of the steel plate. [0003] At present, most of the electrical steel coatings at home and abroad are insulating coatings containing chromium. Chromium is an element harmful to the human body and the environment. As the world pays more and more attention to environmental protection, its use is strictly restricted. [0004] In order to meet the requirements of environmental protection, especially to meet the requirements of the RoHS directive that must be met by the home appliance manufacturing industry, environmental protection insulating coatings for electrical steel are also being developed ...

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): C09D125/14C09D163/00C09D133/04C09D7/12C09D5/25B05D7/14B05D3/02B05D3/10
Inventor 郭太雄董学强刘春富徐权刘建华薛世清袁萍王平利许哲峰尹曦
Owner PANGANG GROUP VANADIUM TITANIUM & RESOURCES
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