Self-lubricating polyimide wire enamel and preparation method thereof

A technology of polyimide varnish and wire varnish, applied in the direction of coating, can solve the problems of motor failure, aging and damage of insulation system, and achieve the effect of simple operation, smooth paint film and broad market prospect.

Inactive Publication Date: 2012-09-19
DONGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the working temperature of the motor exceeds the maximum allowable working temperature of the i

Method used

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  • Self-lubricating polyimide wire enamel and preparation method thereof
  • Self-lubricating polyimide wire enamel and preparation method thereof
  • Self-lubricating polyimide wire enamel and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] At room temperature, 4.48 g (0.02 mol) 2-(4-aminophenyl)-5-aminobenzimidazole, 29.04 g (0.1 mol) 4,4'-diamino-4”-hydroxytriphenylmethane and 41.01 Gram (0.1mol) 2,2-bis-[4-(4-aminophenoxy)phenyl]propane was added to the reaction kettle, 418.2g of N,N-dimethylacetamide was added, and the mixture was stirred and dissolved completely at room temperature. 62.00g (0.2mol) 3,3',4,4'-tetracarboxylic acid diphenyl ether dianhydride powder and 10.41g (0.02mol) 2,2-bis[4-(3,4-dicarboxyphenoxy) Phenyl] propane dianhydride powder was stirred and reacted for 1 hour to obtain 565.14 grams of viscous, homogeneous and transparent polyamic acid solution, namely component A.

[0032] At room temperature, 8.50 grams of stearic acid, 17.00 grams of glycidyl ether propyltrimethoxysilane, and 4.24 grams of tung oil acid anhydride were added to the mixing kettle, and stirred and mixed uniformly at 50° C. to obtain 29.74 grams of mixed solution, which is component B.

[0033] The component A and c...

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Abstract

The invention relates to self-lubricating polyimide wire enamel and a preparation method thereof. The self-lubricating polyimide wire enamel comprises a component A and a component B, wherein the component A is a polyamide acid solution and accounts for 90 wt% to 98 wt% of the total mass of an enamel solution; and the component B is a blend of stearic acid, glycidyl ether propyl trimethoxy silane and tung oil anhydride, of which the mass ratio is 1: (1-3): (0.1- 0.8), and accounts for 2 wt% to 10 wt% of the total mass of the enamel solution. The self-lubricating polyimide wire enamel is obtained only by mixing the component A with the component B at room temperature. The preparation method has the advantages that raw materials are easy to obtain, the operation is simple, the preparation can be completed on general equipment and the industrialization is easy to realize; and a wire enamel film is smooth, even and flexible, is suitable for manufacturing electromagnetic wires of wire rods such as round copper wires, flat copper wires and aluminum wires and has a broad market prospect.

Description

Technical field [0001] The invention belongs to the field of wire enamel and its preparation, and particularly relates to a self-lubricating polyimide wire enamel and a preparation method thereof. Background technique [0002] With the development of science and technology and the continuous improvement of people's living standards, people are increasingly demanding the convenience and stability of electrical products. Therefore, the miniaturization and lightening of electrical appliances is an important development trend, which means that the output kinetic energy of the motor of the same size is greater, or that the motor of the same size is required to have greater power. This presents a problem. Since the working voltage of the motor is generally constant, the working current of the motor must be increased to increase the output power, which will make the power consumption of the motor P=I 2 R increases rapidly, leading to an increase in the temperature rise of the motor and ...

Claims

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Application Information

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IPC IPC(8): C09D179/08C09D7/12C08G73/10
Inventor 虞鑫海陈梅芳
Owner DONGHUA UNIV
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