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Electric brush based on cyanate ester/bismaleimide resin and preparation method thereof

A technology of bismaleimide and cyanate ester is applied in the field of brushes based on cyanate ester/bismaleimide resin and its preparation, and can solve the problem of poor commutation performance, unstable contact and easy occurrence Problems such as mechanical sparks, to achieve the effect of improving brush electrical performance, uniform and stable texture, and beneficial to comprehensive performance

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

[0004] The existing brushes have poor service performance and poor stability. The unit pressure of the brush is too high, the resistance is large and the hardness is high, which leads to increased wear of the brush used in the motor. The unit pressure is too small, the contact is unstable, and the commutation performance is poor. Prone to mechanical sparks; especially poor wear resistance, poor commutation performance, poor anti-interference ability, insufficient heat resistance, unable to meet various requirements of high-performance motors for brushes

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A method for preparing an electric brush based on cyanate ester / bismaleimide resin includes the following steps:

[0034] (1) Add graphene oxide to bisphenol A epoxy resin, stir at 160°C for 1 hour, then add glycerol monostearate and diphenylsiliconediol, stir at 140°C for 1 hour, then add paraffin, and stir for 1 hour , Get the addition system; add ethylene bisstearic acid amide to bisphenol A cyanate, stir at 110°C for 5 minutes, then add 4,4'-diphenylmethane bismaleimide, and stir at 150°C for 45 minutes; Add cardanol and 1,8-octanedithiol, stir for 30 minutes, add bisphenol A phenolic resin and amino-terminated polydimethylsiloxane, continue to stir for 2 hours, then add the additive system at 115°C and stir for 15 The polymer matrix is ​​obtained in minutes;

[0035] (2) Under the protection of nitrogen, mix ammonium hexachloroiridate, dioctyltin, aluminum nitrate nonahydrate, ethanol and cyclohexane; then stir at reflux for 2 hours, then add potassium hydroxide methan...

Embodiment 2

[0039] A method for preparing an electric brush based on cyanate ester / bismaleimide resin includes the following steps:

[0040] (1) Add graphene oxide to p-aminophenol triglycidyl epoxy resin, stir at 160°C for 1 hour, add glycerol monostearate and diphenylsiliconediol, stir at 140°C for 1 hour, then add paraffin wax , Stir for 1 hour to obtain the addition system; add ethylene bisstearic acid amide to bisphenol F cyanate, stir at 110°C for 5 minutes, then add 4,4'-diphenylmethane bismaleimide, 150°C Stir for 45 minutes; add cardanol and 1,8-octanedithiol, stir for 30 minutes, add bisphenol A phenolic resin, amino-terminated polydimethylsiloxane, continue to stir for 2 hours, then add at 115°C System, the polymer matrix is ​​obtained after 15 minutes of stirring;

[0041] (2) Under the protection of nitrogen, mix ammonium hexachloroiridate, dioctyltin, aluminum nitrate nonahydrate, ethanol and cyclohexane; then stir at reflux for 2 hours, then add potassium hydroxide methanol sol...

Embodiment 3

[0044] A method for preparing an electric brush based on cyanate ester / bismaleimide resin includes the following steps:

[0045] (1) Add graphene oxide to bisphenol A epoxy resin, stir at 160°C for 1 hour, then add glycerol monostearate and diphenylsiliconediol, stir at 140°C for 1 hour, then add paraffin, and stir for 1 hour , Get the addition system; add ethylene bisstearic acid amide to bisphenol A cyanate, stir at 110°C for 5 minutes, then add 4,4'-diphenyl ether bismaleimide, stir at 150°C for 45 minutes; Add cardanol and 1,8-octanedithiol, stir for 30 minutes, add bisphenol A phenolic resin and amino-terminated polydimethylsiloxane, continue to stir for 2 hours, then add the additive system at 115°C and stir for 15 The polymer matrix is ​​obtained in minutes;

[0046] (2) Under the protection of nitrogen, mix ammonium hexachloroiridate, dioctyltin, aluminum nitrate nonahydrate, ethanol and cyclohexane; then stir at reflux for 2 hours, then add potassium hydroxide methanol so...

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Abstract

The invention discloses a brush based on cyanate ester / bismaleimide resin and a preparation method thereof. Based on cyanate ester and bismaleimide resin, combined with epoxy resin and phenolic resin, the resin Based on the selection and compatibility of the matrix, combined with a reasonable preparation process, the brushes prepared by the melting method have excellent wear resistance and heat resistance, and have good electrical properties; they can be used for high-quality, high-demand motors and engines.

Description

Technical field [0001] The invention belongs to the technical field of electric tool accessories, and specifically relates to an electric brush based on a cyanate ester / bismaleimide resin and a preparation method thereof. Background technique [0002] Bismaleimide is an intermediate of addition molding polyimide. Both ends of the molecule use unsaturated maleimide rings as active end groups. As an ideal matrix resin for advanced composite materials, Bima Leimide resins and cyanate ester resins have been widely used in aerospace, machinery and electronics, transportation and other sectors; cyanate ester monomers have poor manufacturability due to their high melting point, and the cured product is due to the high degree of cross-linking triazine The existence of the ring makes it more stable and often needs to be modified. At present, the following key problems have not been solved in China. The cyanate ester resin has a single structure, most of which have high melting points, and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L79/08C08L79/04C08L63/00C08L61/06C08L83/08C08L91/06C08K13/04C08K3/04C08K5/103C08K5/5419C08K5/20C08K5/37C08K5/28C08K5/57C08K5/18C08K5/548C08K7/06
CPCC08L79/085C08L2201/08C08L2203/20C08L2205/035C08L79/04C08L63/00C08L61/06C08L83/08C08L91/06C08K13/04C08K3/04C08K5/103C08K5/5419C08K5/20C08K5/37C08K5/28C08K5/57C08K5/18C08K5/548C08K7/06
Inventor 梁国正
Owner SUZHOU UNIV
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