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Preparation method of polyesterimide insulating paint and polyesterimide insulating paint

A polyesterimide, insulating paint technology, applied in sustainable manufacturing/processing, coating, climate sustainability, etc., can solve the problems of complex feeding sequence of production process, volatile raw materials, and high reaction temperature, so as to improve the reaction Quality, heat resistance improvement, effect of heat resistance improvement and chemical resistance improvement

Pending Publication Date: 2022-05-27
ZHUHAI GREE ELECTRIC ENTERPRISES +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are deficiencies in the current production method of polyesterimide paint: some production processes will cause the sublimation of the raw material dimethyl terephthalate, which will block the pipeline; Raw materials are easy to volatilize, resulting in inaccurate proportions; some production processes require complex feeding sequences

Method used

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  • Preparation method of polyesterimide insulating paint and polyesterimide insulating paint

Examples

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Comparison scheme
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Embodiment 1

[0036] This embodiment discloses a preparation method of polyesterimide insulating paint, which includes the following steps:

[0037] S1. Weigh the raw materials of the following formula amounts: 8 parts of trimellitic anhydride, 4 parts of aromatic diamine, 10 parts of diol, 8 parts of glycerol; 22 parts of dimethyl terephthalate, trihydroxyethyl isocyanurate 8 parts of acid ester, 15 parts of xylene, 30 parts of mixed cresol, 4 parts of N-methyl pyrrolidone, 2 parts of butyl orthotitanate, 1 part of resin, wherein the resin is phenolic resin, amino resin, One or more of acrylic resins;

[0038] S2, after described reaction vessel is dried, add described N methyl pyrrolidone solvent after nitrogen 5min, add the trimellitic anhydride of partial amount, be warming up to 100 ℃ under stirring, be incubated for 1 hour until trimellitic anhydride dissolves;

[0039] S3. Divide the aromatic diamine into six equal parts, add one part of the aromatic diamine, and keep the reaction f...

Embodiment 2

[0050] This embodiment discloses a preparation method of polyesterimide insulating paint, which includes the following steps:

[0051] S1. Weigh the raw materials of the following formula amounts: 10 parts of trimellitic anhydride, 6 parts of aromatic diamine, 15 parts of diol, 10 parts of glycerol; 28 parts of dimethyl terephthalate, trihydroxyethyl isocyanurate 12 parts of acid esters, 20 parts of trimethylbenzene, 50 parts of mixed cresols, 8 parts of N-methylpyrrolidone, 3 parts of butyl orthotitanate, and 3 parts of resins, wherein the resins are phenolic resins, amino resins, One or more of acrylic resins;

[0052] S2, after described reaction vessel is dried, add described N-methyl pyrrolidone solvent after 10min of nitrogen, add the trimellitic anhydride of partial amount, be warming up to 140 ℃ under stirring, be incubated for 0.5 hour until trimellitic anhydride dissolves;

[0053] S3. Divide the aromatic diamine into eight equal parts, and by adding one part of the...

Embodiment 3

[0064] This embodiment discloses a preparation method of polyesterimide insulating paint, which includes the following steps:

[0065] S1. Weigh the raw materials of the following formula amounts: 9 parts of trimellitic anhydride, 5 parts of aromatic diamine, 12 parts of diol, 9 parts of glycerol; 25 parts of dimethyl terephthalate, trihydroxyethyl isocyanurate 11 parts of acid ester, 17 parts of xylene, 40 parts of mixed cresol, 5 parts of N-methyl pyridinone, 2.5 parts of butyl orthotitanate, 2 parts of resin, wherein, the resin is phenolic resin, amino resin, One or more of acrylic resins;

[0066] S2, after the reaction vessel is dried, add the N-methylpyrrolidone solvent after 7min of nitrogen, add a partial amount of trimellitic anhydride, be warming up to 120 ° C under stirring, and be incubated for 0.8 hours until the trimellitic anhydride dissolves;

[0067] S3. Divide the aromatic diamine into ten equal parts, and keep the reaction for 0.8 hours by adding one part o...

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Abstract

The invention relates to the technical field of electrical products, in particular to a preparation method of polyesterimide insulating paint and the polyesterimide insulating paint. According to the preparation method of the polyesterimide insulating paint, raw materials are not prone to sublimation or volatilization by accurately controlling the low reaction temperature of ester exchange and the reaction temperature of imidic acid, and the production cost is lowered. According to the method, redundant alcohol solutions and small molecular components are discharged in time through vacuum pressure reduction, forward proceeding of the reaction is promoted, aromatic diamine, trimellitic anhydride and tetrabutyl titanate are added in multiple steps, even in the exothermic reaction, the reaction temperature fluctuation is small, the reaction controllability is improved, and the reaction yield is increased. The polyesterimide insulating paint has heat resistance, chemical resistance and excellent electrical property.

Description

technical field [0001] The invention relates to the technical field of electrical products, in particular to a preparation method of polyesterimide insulating paint and polyesterimide insulating paint. Background technique [0002] The enameled wire is an important part of the electromagnetic conversion device. The enameled wire is composed of a metal wire and an insulating paint film coated on the surface of the conductor. The insulating varnish determines the performance and quality level of the enameled wire. Generally, the insulating varnish is required to have good thermal, electrical, chemical resistance and mechanical properties. [0003] With the increasingly harsh environment of electromagnetic conversion equipment, the requirements for the heat resistance and chemical resistance of the insulating paint film of enameled wires are particularly high. Among them, polyesterimide paint can meet the thermal class requirements of 180 and above, and at the same time has ex...

Claims

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Application Information

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IPC IPC(8): C09D179/08C09D5/25C09D7/20C09D7/65C08G73/16
CPCC09D179/08C09D5/00C09D7/20C09D7/65C08G73/16C08L61/06C08L61/20C08L33/00Y02P20/10
Inventor 姚荣文于伟莉吴宇萌马红杰张立彦黄代忠
Owner ZHUHAI GREE ELECTRIC ENTERPRISES
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