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A kind of flame-retardant electric brush and preparation method thereof

A brush and composition technology, applied in brush manufacturing, circuits, current collectors, etc., can solve the problems of animal body deformity, difficulty in processing or recycling bromine-containing waste, etc., achieve small thermal recession, reduce the risk of friction cracking, friction coefficient high effect

Active Publication Date: 2020-04-03
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Brominated flame retardants release toxic substances during combustion or waste disposal, such as producing a large amount of smoke and irritating toxic gases, and may also produce polybrominated dibenzofuran (PBDF), dioxin (dioxin) and other high Carcinogenic and toxic substances that cause deformities in animals. In addition, it is very difficult to treat or recycle wastes containing bromine. Therefore, it is necessary to find environmentally friendly flame retardants that replace halogens.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A method for preparing a flame-retardant electric brush, comprising the following steps:

[0034] (1) Under nitrogen protection, mix ammonium hexachloroiridate, zinc acetate, antimony trichloride, ethanol and cyclohexane; then reflux and stir for 6 to 8 hours, then add potassium hydroxide ethanol solution and acetylsulfonyl peroxide Cyclohexane; after reacting for 0.5 to 1 hour, cool naturally to room temperature, add ethyl acetate to coagulate and centrifuge; disperse the centrifuged precipitate in ethanol to obtain a dispersion system; add polyvinyl alcohol and hydrogen peroxide to the dispersion system, and stir at 50°C for 5 Minutes, then add glyceryl palmitate, iron tetraphenyl porphyrin, stir at 60°C for 2 hours, then add ammonia water, ethyl orthosilicate, reflux and stir for 3 hours, then concentrate to obtain a concentrate with a solid content of 80%; The concentrate is subjected to high-gravity treatment; then freeze-dried to obtain nanopowder; the rotation sp...

Embodiment 2

[0039] A method for preparing a flame-retardant electric brush, comprising the following steps:

[0040] (1) Under nitrogen protection, mix ammonium hexachloroiridate, zinc acetate, antimony trichloride, ethanol and cyclohexane; then reflux and stir for 6 to 8 hours, then add potassium hydroxide ethanol solution and acetylsulfonyl peroxide Cyclohexane; after reacting for 0.5 to 1 hour, cool naturally to room temperature, add ethyl acetate to coagulate and centrifuge; disperse the centrifuged precipitate in ethanol to obtain a dispersion system; add polyvinyl alcohol and hydrogen peroxide to the dispersion system, and stir at 50°C for 5 Minutes, then add glyceryl palmitate, iron tetraphenyl porphyrin, stir at 60°C for 2 hours, then add ammonia water, ethyl orthosilicate, reflux and stir for 3 hours, then concentrate to obtain a concentrate with a solid content of 80%; The concentrate is subjected to high-gravity treatment; then freeze-dried to obtain nanopowder; the rotation sp...

Embodiment 3

[0045] A method for preparing a flame-retardant electric brush, comprising the following steps:

[0046] (1) Under nitrogen protection, mix ammonium hexachloroiridate, zinc acetate, antimony trichloride, ethanol and cyclohexane; then reflux and stir for 6 to 8 hours, then add potassium hydroxide ethanol solution and acetylsulfonyl peroxide Cyclohexane; after reacting for 0.5 to 1 hour, cool naturally to room temperature, add ethyl acetate to coagulate and centrifuge; disperse the centrifuged precipitate in ethanol to obtain a dispersion system; add polyvinyl alcohol and hydrogen peroxide to the dispersion system, and stir at 50°C for 5 Minutes, then add glyceryl palmitate, iron tetraphenyl porphyrin, stir at 60°C for 2 hours, then add ammonia water, ethyl orthosilicate, reflux and stir for 3 hours, then concentrate to obtain a concentrate with a solid content of 80%; The concentrate is subjected to high-gravity treatment; then freeze-dried to obtain nanopowder; the rotation sp...

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Abstract

The invention provides a flame-retardant electric brush and a preparation method thereof. The electric brush prepared based on cyanate ester and bismaleimide resin combined with a phenolic resin solution method has excellent flame retardancy and good resistance to fire. Abrasive performance, heat resistance and electrical performance; through the selection and compatibility of resin matrix, combined with reasonable preparation process, the products obtained have high performance and can be used for high-quality and high-demand motors and engines.

Description

technical field [0001] The invention belongs to the technical field of electric tool accessories, and in particular relates to a flame-retardant electric brush and a preparation method thereof. Background technique [0002] Brominated flame retardants release toxic substances during combustion or waste disposal, such as producing a large amount of smoke and irritating toxic gases, and may also produce polybrominated dibenzofuran (PBDF), dioxin (dioxin) and other high Toxic substances that are carcinogenic and cause deformities in animals, and it is also very difficult to treat or recycle bromine-containing wastes, so it is necessary to find environmentally friendly flame retardants that replace halogens. [0003] The brush is a device for transferring energy between the fixed part and the rotating part of the motor or engine. It is generally made of pure carbon and a curing agent. Sliding contact is made to form an electrical connection. As a current sliding contact, brush...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L79/08C08L79/04C08L61/06C08L71/12C08L71/02C08L1/28C08K13/06C08K9/10C08K3/22C08K7/24C08K9/04C08K5/5419H01R39/20H01R39/24H01R43/12
CPCC08K2003/2296C08K2201/001C08K2201/011C08L79/085C08L2201/02C08L2201/08C08L2203/20C08L2205/035H01R39/20H01R39/24H01R43/12C08L79/04C08L61/06C08L71/12C08L71/02C08L1/284C08K13/06C08K9/10C08K3/22C08K7/24C08K9/08C08K5/5419C08K3/2279
Inventor 梁国正
Owner SUZHOU UNIV
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