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

Method for preparing non-hexavalent chromium environment friendly insulating coating material for silicon steel sheet

Inactive Publication Date: 2009-03-11
EAST CHINA NORMAL UNIVERSITY
View PDF0 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The temperature resistance of polyacrylic resin is poor, and the adhesion to the added inorganic filler is also poor, and the coating material is easy to fall off during the high temperature annealing process at 750-850 °C
In addition, there is also a chromate (MgCr 2 o 7 and ZnCr 2 o 7 ) insulating coating material, its disadvantages include: it contains highly toxic and carcinogenic hexavalent chromium (Cr 6+ ), poor stability, not long-term storage and complicated environmental protection treatment

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

Embodiment 1

[0022] In the first step, the light magnesium compound is magnesium oxide, the reaction temperature and time are respectively 50°C and 60 minutes, and the pH value of the solution is adjusted to 2; in the second step, at a temperature of 40°C, the amount of curing agent added 0.1% of the weight of the solution; in the third step, at a temperature of 40°C, stir for 60 minutes, the weight ratio of the magnesium phosphate solution to the water-soluble epoxy resin solution is 24:1, and then add 0.5% nanometer of the weight of the mixed solution The mixed powder of titanium oxide and nano magnesium oxide is added to the mixed solution, the average particle size of the nano titanium oxide and nano magnesium oxide powder is 10nm, and the total solid content of the coating material is 25.5 wt%.

Embodiment 2

[0024] In the first step, the light magnesium compound is magnesium oxide, the reaction temperature and time are 65°C and 45 minutes respectively, and the pH value of the solution is adjusted to 2.5; in the second step, at a temperature of 50°C, the amount of curing agent added 0.15% of the solution weight; in the third step, at a temperature of 50°C, stir for 45 minutes, the weight ratio of the magnesium phosphate solution to the water-soluble epoxy resin solution is 7.33:1, and then add 0.75% of the mixed solution weight to nano The mixed powder of titanium oxide and nano magnesium oxide is added into the mixed solution, the average particle diameter of the nano titanium oxide and nano magnesium oxide powder is 35nm, and the total solid content of the coating material is 25.75 wt%.

Embodiment 3

[0026] In the first step, the light magnesium compound is magnesium oxide, the reaction temperature and time are 80°C and 30 minutes respectively, and the pH value of the solution is adjusted to 3; in the second step, at a temperature of 60°C, the amount of curing agent added 0.2% of the solution weight; in the third step, at a temperature of 60°C, stir for 30 minutes, the weight ratio of the magnesium phosphate solution to the water-soluble epoxy resin solution is 4:1, and then add 1% nanometer The mixed powder of titanium oxide and nano magnesium oxide is added into the mixed solution, the average particle diameter of the nano titanium oxide and nano magnesium oxide powder is 60nm, and the total solid content of the coating material is 26wt%.

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
The average particle sizeaaaaaaaaaa
The average particle sizeaaaaaaaaaa
The average particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention relates to a method for preparing a hexavalent chromium-free environment-friendly insulated coating material for a silicon-steel sheet and belongs to the technical field for preparing the insulated coating material for the silicon-steel sheet. A lightweight magnesium-lithium composition and phosphoric acid have reaction to generate magnesium phosphate solution; the acidity of the solution is regulated; and the solution, water-soluble epoxy resin solution and a mixed powder body of nanometer titanium dioxide and nanometer magnesia are mixed and evenly stirred to obtain the hexavalent chromium-free environment-friendly insulated coating material for the silicon-steel sheet. The method has the advantages of availability of raw materials, simple production process, low equipment requirement, low production cost, high production efficiency, no generation of byproducts in the production process, high product yield and easy realization of industrialization; the prepared product has good performance; and a coating layer of the product has good high-temperature resistance and welding and stamping performances, and meets the environment-friendly requirement of the state and European Union.

Description

technical field [0001] The invention relates to a preparation method of a hexavalent chromium-free environmental protection insulating coating material for silicon steel sheet, to be precise, it relates to a method of using light magnesium oxide (or magnesium hydroxide, magnesium carbonate), nano-titanium oxide, nano-magnesium oxide and The invention discloses a method for preparing a hexavalent chromium-free environmental protection insulating coating material for silicon steel sheets using water-soluble epoxy resin as a raw material, and belongs to the technical field of preparation of insulating coating materials for silicon steel sheets. Background technique [0002] Silicon steel sheet is a kind of cold-rolled silicon steel. It has the advantages of high electromagnetic strength and low power loss. It belongs to special electrical steel and is the main base material for conventional transformers and motors. If the surface of the silicon steel sheet has not undergone any...

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): C09D163/00C09D5/25
Inventor 宗俊宗巍
Owner EAST CHINA NORMAL UNIVERSITY
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