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A kind of environment-friendly self-adhesive coating for electrical steel and preparation method thereof

An environmentally friendly, self-bonding technology, applied in the field of metal surface coatings, can solve the problems of high content of volatile organic solvents, low content of volatile organic solvents, and difficult to control the degree of curing, and achieves large process temperature difference, excellent water resistance, The effect of avoiding cold bonding problems

Active Publication Date: 2017-06-16
马鞍山市恺鸾鑫实业有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to overcome the disadvantages of poor comprehensive performance, uneasy control of curing degree and high content of volatile organic solvents in the prior art of electrical steel adhesive coatings, and to provide an environmentally friendly self-adhesive coating for electrical steel and its preparation method , the present invention adopts acrylic resin and epoxy resin as the main film-forming agent, and uses sodium aluminum silicate and fumed silica as auxiliary film-forming agents to provide an inorganic skeleton, so that the extrusion resistance of the coating is improved, and its impact resistance Good performance, high insulation, excellent water resistance, and the content of volatile organic solvents in the coating is extremely low, which is an environmentally friendly coating

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A kind of environment-friendly self-adhesive coating for electrical steel of the present embodiment, its preparation method is:

[0032] Under stirring, add 0.7% dimethylethanolamine, 20% water-soluble acrylic resin, 5% ethylene glycol phenyl ether, 0.5% wetting and dispersing agent, 0.2% alkyne di Alcohol surfactant, 5% sodium aluminum silicate, 2.3% fumed silica, 5% dicyandiamide, stirred for 20 minutes; then put the stirred slurry into a sand mill for sand grinding, and grind to a slurry particle size D 50 At 0.5 microns; finally, under stirring, add 40% water-based epoxy resin to the ground slurry, stir for 50 minutes, pass through a 5000-mesh screen and discharge, which is the environmentally friendly self-adhesive coating of the present invention.

[0033] In the self-adhesive coating, the wetting and dispersing agent is byk 191 from BYK Chemical Co., Ltd., and the acetylene glycol surfactant is DF-80B from Tianjin Saifei Chemical Technology Development Co., Ltd....

Embodiment 2

[0035] A kind of environment-friendly self-adhesive coating for electrical steel of the present embodiment, its preparation method is:

[0036] Under stirring, add 1.5% dimethylethanolamine, 20% water-soluble acrylic resin, 0.5% ethylene glycol phenyl ether, 0.5% wetting and dispersing agent, 0.1% alkyne Glycol surfactant, 8.0% sodium aluminum silicate, 5.0% fumed silicon dioxide, 1% dicyandiamide, stirred for 20min; then the stirred slurry was put into a sand mill for sand grinding, and ground to The particle size of slurry D 50At 0.8 microns; finally, under stirring, add 40% water-based epoxy resin to the ground slurry, after stirring for 30 minutes, pass through a 5000-mesh screen and discharge, which is the environmentally friendly self-adhesive coating of the present invention.

[0037] In the self-adhesive coating, the wetting and dispersing agent is byk 192 from BYK Chemical Co., Ltd., and the acetylenic diol surfactant is DF-110B from Tianjin Saifei Chemical Technolog...

Embodiment 3

[0039] A kind of environment-friendly self-adhesive coating for electrical steel of the present embodiment, its preparation method is:

[0040] Under stirring, add 0.5% dimethylethanolamine, 15% water-soluble acrylic resin, 3.5% ethylene glycol phenyl ether, 0.8% wetting and dispersing agent, 0.3% alkyne Glycol surfactant, 1% sodium aluminum silicate, 0.5% fumed silicon dioxide, 4% dicyandiamide, stirred for 25min; then the stirred slurry was put into a sand mill for sand grinding, and ground to The particle size of slurry D 50 At 1.0 micron; finally, under stirring, add 70% water-based epoxy resin to the ground slurry, stir for 50 minutes, pass through a 5000-mesh screen and discharge, which is the environmentally friendly self-adhesive coating of the present invention.

[0041] In this self-adhesive coating, the wetting and dispersing agent is byk 180 and byk 192 from BYK Chemical Co., Ltd. mixed in a ratio of 1:1, and the acetylene glycol surfactant is DF-80D from Tianjin ...

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Abstract

The invention discloses an environment-friendly self-adhesive coating for electrical steel and a preparation method thereof, belonging to the field of metal surface coatings. The preparation process of the self-adhesive paint of the present invention is as follows: 15% to 50% of water-soluble acrylic resin, 1% to 10% of dicyandiamide, 0.5% to 6% of ethylene glycol phenyl ether, and 1.5% of inorganic filler are sequentially added to pure water. %~13%, 0.5%~2.5% of dimethylethanolamine, 0.1%~0.8% of wetting and dispersing agent, 0.1%~0.3% of acetylenic glycol surfactant, stirring for 5~30min; particle size D 50 0.5 to 1.5 microns; add 30% to 70% of water-based epoxy resin to the ground slurry under stirring, stir for 10 to 60 minutes, and discharge through a sieve to become an environmentally friendly self-adhesive coating. The coating is green and environmentally friendly, has good storage stability, and when it is cured under heat and pressure, the coating will not be deformed by compression to cause the coating to be extruded.

Description

technical field [0001] The invention relates to the technical field of metal surface coatings, in particular to an environment-friendly self-adhesive coating for electrical steel and a preparation method thereof. Background technique [0002] Electrical steel sheets, also known as silicon steel sheets, are mainly used in various motor cores. Generally, electrical steel sheets are coated with an insulating coating on their surface, and then they are sequentially stamped into a predetermined shape, stacked, and connected together by welding, locking, riveting, etc. to form a magnetic core. Most electrical steel sheets are assembled into iron cores by welding, bolting, self-fastening or riveting, but the fixing method of these iron cores is the local "point" fixing method of the chip, and its connection force is not high, which is difficult to meet the fastening requirements. A core with high strength requirements. In addition, welding and riveting methods are not suitable fo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D133/00C09D163/00C09D7/12
Inventor 戴恒陶胡承亮高学频周浩张永海李路
Owner 马鞍山市恺鸾鑫实业有限责任公司
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