Polyamide-imide insulating varnish and preparation method thereof

A technology of polyamide-imide and polyamide-imide resin, which is applied in the direction of coating, etc., can solve the problems of self-lubricating ability to be improved, and achieve the effect of excellent dispersion, strong thermal stability and enhanced mechanical properties

Inactive Publication Date: 2012-07-11
GUANGDONG JINGDA REA SPECIAL ENAMELED WIRE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are existing high-temperature-resistant self-lubricating polyamide-imide insulating varnishes, which are widely used in the market, but the existing problems are that the self-lubricating ability needs to be impr

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] The polyamide-imide insulating varnish provided in this embodiment comprises a polyamide-imide solution in a proportion of 100-120 parts by weight and a sepiolite material in 2-5 parts;

[0045] Wherein, the polyamide-imide solution comprises the following components in parts by weight:

[0046] Polyamideimide resin: 20-35 parts,

[0047] The organic solvent N-methylpyrrolidone used as polyamideimide resin solvent: 20-60 parts,

[0048] Phthalate diesters used as diluents: 0.1-10 parts

[0049] Toluene used as the first auxiliary agent: 0.1-20 parts,

[0050] Ethylbenzene used as the second auxiliary agent: 0.1-20 parts,

[0051] 2-butanone (ie methyl ethyl ketone) used as the third auxiliary agent: 0.1-20 parts.

[0052] The sepiolite material comprises the following components in proportions by weight:

[0053] Nanoscale meerschaum: 10 parts,

[0054] Silane coupling agent KH550: 1-3 parts,

[0055] Sodium dodecylsulfonate: 0.1-0.5 parts.

[0056] Among them, ...

Embodiment 2

[0064] The preparation method of the polyamide-imide insulating varnish provided by the present embodiment comprises the steps in the following order:

[0065] 1) Preparation of polyamideimide solution:

[0066] Dissolve 20-35 parts by weight of polyamide-imide resin in 20-60 parts of N-methylpyrrolidone used as a solvent for polyamide-imide resin, stir to dissolve completely, and then add 0.1- 10 parts of phthalic acid diester used as diluent, 0.1-20 parts of toluene used as the first auxiliary agent, 0.1-20 parts of ethylbenzene used as the second auxiliary agent, 0.1-20 parts used as the third auxiliary agent After the 2-butanone of agent is completely dissolved, it is for subsequent use;

[0067] 2) Pretreatment of sepiolite:

[0068] Mix 10 parts by weight of nano-grade sepiolite, 1-3 parts of silane coupling agent KH550 and 0.1-0.5 parts of sodium dodecylsulfonate evenly, and then use an ultrasonic cleaner at room temperature Disperse in medium for 10-30 minutes, set ...

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Abstract

The invention relates to a polyamide-imide insulating varnish. The polyamide-imide insulating varnish is characterized in that the varnish comprises the following components in parts by weight: 100-120 parts of polyamide-imide solution and 2-5 parts of sepiolite material, wherein the polyamide-imide solution mainly comprises the following components in parts by weight: 20-35 parts of polyamide-imide resin and 20-60 parts of organic solvent; the organic solvent is one or a combination of N-methylpyrrolidone, chlorobenzene, bromobenzene, dichlorobenzene, dibromobenzene, 1-tetralone, fenchone, phorone and isophorone; and the sepiolite material mainly comprises sepiolite. The polyamide-imide insulated enamel wire provided by the invention forms a homogeneous stable system, the surface friction coefficient is below 0.30, and each index meets the International Electrotechnical Commission (IEC) standard requirement; and the polyamide-imide insulating varnish is suitable to be used as the enamel wire insulating varnish for coating the surface of the copper wire.

Description

Technical field [0001] The invention relates to a polyamide-imide insulating varnish, especially a formula of polyamide-imide insulating varnish with self-lubricating properties, long service life, high wear resistance and high temperature resistance; the invention also relates to a polyamide-imide insulating varnish. The invention discloses a preparation method of an amide-imide insulating varnish. Background technique [0002] High temperature resistant self-lubricating polyamide-imide insulating varnish is mainly used in the enameled wire industry. At present, the existing high-temperature-resistant self-lubricating polyamide-imide insulating paint is widely used in the market, but the problem is that the self-lubricating ability needs to be improved, and the wear resistance needs to be further improved; in order to meet the needs of the market, it is urgent to develop new Strong self-lubricating, high-temperature-resistant and long-life polyamide-imide insulating varnis...

Claims

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Application Information

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IPC IPC(8): C09D179/08C09D7/12C09D5/25
Inventor 刘保健黄棉忠孔敏妍谈家满赵国云舒强会
Owner GUANGDONG JINGDA REA SPECIAL ENAMELED WIRE CO LTD
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