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Polyamide imide polymer, its preparing method and use in paint-coated wire insulation layer

A polyamide-imide, manufacturing method technology, applied in the direction of insulated conductors, insulated cables, conductors, etc., can solve the problems of polymer hydrolysis, the decline of polymer heat resistance and other characteristics, and achieves improved heat resistance and improved reliability. Workability, low viscosity effect

Inactive Publication Date: 2007-08-29
乐星电缆(天津)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the polyimide polymer is produced by the production method of the above reaction formula 3, the water molecules generated during the dehydration reaction remain in the polymer solution, which may cause the hydrolysis of the polymer, resulting in the heat resistance and other properties of the polymer. decline

Method used

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  • Polyamide imide polymer, its preparing method and use in paint-coated wire insulation layer
  • Polyamide imide polymer, its preparing method and use in paint-coated wire insulation layer
  • Polyamide imide polymer, its preparing method and use in paint-coated wire insulation layer

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Embodiment 1

[0043] Embodiment 1: the manufacture of polyamide-imide polymer

[0044] Add nitrogen into a 200ml stainless steel reactor, dissolve pyromellitic anhydride and trimellitic anhydride in N-methyl-2-pyrrolidone according to the amount shown in Table 1, and add it to the stainless steel reactor, and then stir the reactor at a speed of about 100RPM After adding 4,4-methylene diphenyl diisocyanate and a certain amount of cresol at the same time, stir at 100RPM for 30 minutes, then slowly heat up to 70°C over 2 hours, then after 2 hours (10°C / 20min ) was heated up to 140°C again. Stir with 100 RPM speed for about 30 minutes while the temperature of above-mentioned solution keeps 140 ℃, the temperature of solution after reaction finishes slowly reduces to 40 ℃, add N-methyl-2-pyrrolidone afterward and dilute the solution to 40% (weight ratio), the solution was stirred for about 4 hours to make a polyamideimide polymer solution.

[0045] Table 1

[0046] Example 1

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Abstract

The invention relates to an enameled wire insulation material, especially polyamide imide polymer and manufacturing method and the application. It contains suitable ratio functional group that could solve technology problems..

Description

technical field [0001] The invention belongs to the field of enameled wires; specifically, it belongs to the field of enameled wire insulating layer materials. Background technique [0002] The enamelled copper wire exists in the shape of a coil inside the electrical equipment, and through the electromagnetic conversion process, it can convert between electrical energy and mechanical energy. It is widely used in heavy electrical appliances, household appliances, medical equipment, aerospace industry, nuclear material products, etc. In electrical and electronic products. [0003] Enameled copper wire has a wide range of applications. According to different physical properties such as heat resistance, insulation, hydrolysis resistance, and solvent resistance in the application field, different types of enameled copper wires have been developed from a very early age. [0004] Enameled copper wire can be divided into polyacetal enameled copper wire, polyurethane enameled copper...

Claims

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Application Information

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IPC IPC(8): C08G73/10H01B7/17
Inventor 洪元基
Owner 乐星电缆(天津)有限公司
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