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Epoxy resin composition for packaging motor rotor

A technology of epoxy resin and motor rotor, applied in the direction of epoxy resin glue, non-polymer adhesive additive, aldehyde/ketone condensation polymer adhesive, etc. Problems such as poor performance and magnetic steel bonding performance have not been paid attention to, achieving high glass transition temperature, meeting high-speed operation requirements, and excellent magnetic steel bonding performance.

Inactive Publication Date: 2020-11-10
江苏中科科化新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the production efficiency of this process is extremely low. At the same time, due to the low glass transition temperature of the resin material, the bonding performance to the magnetic steel is poor. During the high-speed operation of the motor, the magnetic steel is prone to fall off; and the motor is in operation. , due to the high working temperature, the strength of the resin material will deteriorate, which will further affect the use of the motor
[0003] Although TW 20144903A and CN109082077A disclose a solid epoxy resin composition for rotor encapsulation, the glass transition temperature of the resin composition is low (<150°C), and no attention has been paid to the bonding performance of the magnetic steel. Under higher operating temperature conditions, it will greatly affect the use of the motor, so there is still room for further improvement
In addition, CN109467881A discloses a super heat-resistant, high thermal conductivity epoxy molding compound, but the fluidity of the material is difficult to meet the packaging requirements of the motor rotor, and there is also a great room for improvement in the bonding performance of the resin to the magnetic steel

Method used

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  • Epoxy resin composition for packaging motor rotor
  • Epoxy resin composition for packaging motor rotor
  • Epoxy resin composition for packaging motor rotor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0080] See Table 1 for the composition of the raw material formula of the epoxy resin composition for encapsulating the motor rotor in Example 1.

[0081] The method for preparing the epoxy resin composition for motor rotor encapsulation in this embodiment is as follows:

[0082] (1) 73.5g epoxy resin SQCN 700-1, 18.75g epoxy resin HP 4700, 45.00g phenolic resin PF8011, 0.75g ion trapping agent DHT-4C, 1.88g low stress modifier SF-8241EG, 0.60g Formula 1 coupling agent (1,2,4-triazole), 2.05g formula 2 coupling agent, 2.25g accelerator 2-ethyl-4 methylimidazole, 592.5g fused silica powder, 3.00g The molding agent carnauba wax, 7.50 g of the flame retardant zinc borate and 2.25 g of the colorant carbon black were put into a high-speed mixer and mixed for 5 minutes, and the epoxy molding compound mixture was obtained by discharging.

[0083] (2) The epoxy molding compound mixture obtained in step (1) is added into an open mill for mixing. The mixing temperature was 80°C, and t...

Embodiment 2

[0085] See Table 1 for the composition of the raw material formulation of the epoxy resin composition for encapsulating the motor rotor in Example 2.

[0086] The method for preparing the epoxy resin composition for motor rotor encapsulation in this embodiment is as follows:

[0087] (1) 45.75g epoxy resin SQCN 700-1, 45.75g epoxy resin HP 4700, 53.25g phenolic resin PF8011, 1.50g ion trapping agent DHT-4C, 3.75g low stress modifier SF-8241EG, 1.50g Formula 1 coupling agent (3-mercapto-1,2,4-triazole), 0.375g formula 2 coupling agent, 1.875g accelerator 2-ethyl-4 methylimidazole, 585.00g fused silica powder , 6.00 g of release agent carnauba wax, 3.75 g of flame retardant zinc borate and 1.5 g of colorant carbon black were put into a high-speed mixer and mixed for 5 minutes, and the epoxy molding compound mixture was obtained by discharging.

[0088] (2) The epoxy molding compound mixture obtained in step (1) is added into an open mill for mixing. The mixing temperature was ...

Embodiment 3

[0090] See Table 1 for the composition of the raw material formula of the epoxy resin composition for encapsulating the motor rotor in Example 3.

[0091] The method for preparing the epoxy resin composition for motor rotor encapsulation in this embodiment is as follows:

[0092] (1) 5.55g epoxy resin SQCN 700-1, 55.50g epoxy resin HP 4700, 37.95g phenolic resin MEH7500, 1.125g ion trapping agent DHT-4C, 3.75g low stress modifier SF-8241EG, 2.25g Formula 1 coupling agent (3-amino-1,2,4-triazole), 1.50g accelerator 2-ethyl-4 methylimidazole, 622.5g fused silica powder, 6.75g release agent carnauba Wax, 11.25g of flame retardant zinc borate and 1.875g of colorant carbon black were put into a high-speed mixer and mixed for 5 minutes, and the epoxy molding compound mixture was obtained by discharging.

[0093] (2) The epoxy molding compound mixture obtained in step (1) is added into an open mill for mixing. The mixing temperature was 80°C, and the epoxy resin molding compound wa...

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Abstract

The invention provides an epoxy resin composition for packaging a motor rotor, which comprises the following components in parts by weight: 20-150 parts of epoxy resin, 10-100 parts of curing agent, 0.1-5 part of coupling agent, 300-800 parts of solid filler, 0.1-5 part of accelerant, 0.5-5 part of low-stress modifier, 0.1-10 part of release agent, 0.1-5 part of ion trapping agent, 1-20 parts of flame retardant, and 0.1-5 parts of a coloring agent. Compared with the prior art, the epoxy resin composition disclosed by the invention has the main advantages: (1) the fluidity is excellent, and theformability is good; (2) the glass transition temperature is extremely high, and the motor operation requirement under a high-temperature working condition can be met; and (3) the magnetic steel adhesive has excellent magnetic steel bonding performance and can meet the requirement of high-speed operation of the motor.

Description

technical field [0001] The invention relates to an epoxy resin composition for motor rotor packaging, which belongs to the field of rotor packaging. Background technique [0002] At present, the motor rotor is usually formed by inserting magnetic steel sheets into the rotor iron core holes and filling and bonding them with liquid resin. In the field of packaging technology, liquid resins such as urethane resins or epoxy resins are usually used to manufacture by potting technology. (such as Chinese patent CN109370150A). However, the production efficiency of this process is extremely low. At the same time, due to the low glass transition temperature of the resin material, the bonding performance to the magnetic steel is poor. During the high-speed operation of the motor, the magnetic steel is prone to fall off; and the motor is in operation. , due to the high working temperature, the strength of the resin material will deteriorate, which will further affect the use of the mo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J163/00C09J161/06C09J11/06C09J11/04
CPCC09J163/00C09J161/06C09J11/06C09J11/04C08L2205/025C08L2205/035C08K2003/387C08K2201/014C08L63/00C08L61/06C08K13/02C08K5/3472C08K5/548C08K3/26C08K3/38C08K3/36C08K5/378
Inventor 李卓李海亮李刚王善学卢绪奎
Owner 江苏中科科化新材料股份有限公司