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Halogen-free flame-retardant high-temperature-resistance insulation paint for motor

A high-temperature-resistant insulating paint and epoxy resin technology, applied in coatings, epoxy resin coatings, etc., can solve the problems of small molecular weight, low cross-linking density, and poor heat resistance of phosphate ester flame retardants, and achieve low cost , High heat resistance index, good heat dissipation performance

Active Publication Date: 2013-11-20
SUZHOU TAIHU ELECTRIC ADVANCED MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the insulating varnish disclosed in this patent is not suitable for glycidyl ether type epoxy resin, because the phosphate ester flame retardant has small molecular weight, is volatile, and does not contain epoxy groups, so it is difficult to communicate with glycidyl ether type epoxy resin. Link curing, resulting in low cross-linking density and poor heat resistance, making it difficult to apply to the field of high-temperature-resistant halogen-free insulating materials

Method used

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  • Halogen-free flame-retardant high-temperature-resistance insulation paint for motor
  • Halogen-free flame-retardant high-temperature-resistance insulation paint for motor
  • Halogen-free flame-retardant high-temperature-resistance insulation paint for motor

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Experimental program
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Effect test

Embodiment 1

[0028] The formula of the insulating varnish for motor according to the present embodiment is: 100 parts of bisphenol A type epoxy resin (commercial code is E51), 20 parts of phosphorus-containing epoxy resin (DGP-1), silicon skeleton epoxy resin (SE- 1) 30 parts, 5 parts of Nadic acid anhydride, 0.1 part of cobalt naphthenate.

[0029] The preparation process of the above-mentioned silicon skeleton epoxy resin (SE-1) is as follows: add 0.2mol glycidyl methacrylate, 50ml THF, and 2.0g halloysite into a 100ml three-necked flask equipped with a stirring and condenser tube successively. Platinum catalyst, raise the temperature to 60°C, slowly add 0.1mol tetramethyldisiloxane dropwise under stirring condition, continue to stir and react at 60°C for 12h, recover the catalyst by suction filtration, spin the filtrate at 60°C to remove the solvent ,get.

[0030] After the above-mentioned components are mixed evenly according to the formula, the insulating varnish is prepared. When t...

Embodiment 2

[0032] According to the formula of the insulating varnish for motor of the present embodiment: 100 parts of bisphenol A type epoxy resin (commercial code is E44), 30 parts of phosphorus-containing epoxy resin (DGP-2), silicon skeleton epoxy resin (SE- 2) 60 parts, 5 parts of methyl tetrahydrophthalic anhydride, 0.2 parts of cobalt acetylacetonate.

[0033] The preparation process of the above-mentioned silicon skeleton epoxy resin (SE-2) is as follows: add 0.2mol allyl glycidyl ether, 50ml THF, and 2.0g halloysite successively in a 100ml three-necked flask equipped with a stirring and condensing tube Platinum catalyst, raise the temperature to 60°C, slowly add 0.1mol tetramethyldisiloxane dropwise under stirring condition, continue to stir and react at 60°C for 12h, recover the catalyst by suction filtration, spin the filtrate at 60°C to remove the solvent ,get.

[0034] After the above-mentioned components are mixed evenly according to the formula, the insulating varnish for...

Embodiment 3

[0036] According to the formula of the insulating varnish for motor of the present embodiment: 100 parts of bisphenol F type epoxy resin (commercial code is F51), 40 parts of phosphorus-containing epoxy resin (DGP-1), silicon skeleton epoxy resin (SE- 1) 50 parts, 20 parts of methyl hexahydrophthalic anhydride, 0.3 parts of cobalt acetylacetonate, 0.2 parts of aluminum acetylacetonate.

[0037] After the above-mentioned components are mixed evenly according to the formula, the insulating varnish for motors is prepared. When the insulating varnish is used, it should first be cured at about 100°C for 1 hour, then cured at about 140°C for 2.2 hours, and then cured at about 170°C for 2.5 hours to form an insulating material. The performance indicators are shown in Table 1.

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Abstract

The invention relates to halogen-free flame-retardant high-temperature-resistance insulation paint for a motor. The paint consists of the following ingredients in parts by weight: 100 parts of glycidyl ether type epoxy resin, 20 to 40 parts of phosphorous epoxy resin, 30 to 60 parts of silicon framework epoxy resin, 5 to 20 parts of curing agents and 0.1 to 1 part of curing promoters, wherein the glycidyl ether type epoxy resin is bisphenol A type epoxy resin or bisphenol F type epoxy resin with the epoxy equivalent weight smaller than or equal to 300g / mol. After the insulation paint provided by the invention is used for the high-temperature motor, the oxygen index of the formed insulation materials is greater than 32 percent, the bonding intensity is high, the insulation performance is good, the mechanical intensity is high, the heat radiation performance is good, the heat resistance index is high, the bonding performance is good with electromagnetism, and in addition, the verdigris phenomenon is avoided, so the insulation paint provided by the invention can simultaneously meet various requirements of the insulation paint for the motor. In addition, the used raw materials are easy to obtain, and the cost is low, so compared with the existing insulation paint, the insulation paint provided by the invention also has the cost advantage.

Description

technical field [0001] The invention relates to a halogen-free flame-retardant and high-temperature-resistant insulating varnish for motors. Background technique [0002] Insulating varnish is an important insulating material that is based on high molecular polymer and solidifies into an insulating film or an insulating whole under certain conditions. It is generally composed of resins, curing agents and other main materials. For the halogen-free insulating varnish used in motors, it is required to have excellent insulation performance, heat dissipation performance, flame retardancy and stability, and at the same time meet the requirements of environmental protection. However, so far, few insulating varnishes are difficult to simultaneously meet all these requirements. [0003] Chinese invention patent ZL201010234600.6 discloses a halogen-free flame-retardant high-temperature-resistant electrical insulating varnish, which consists of the following components by weight: 100 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D163/02C09D163/00C09D7/12C09D5/25
Inventor 井丰喜张道洪施文磊张春琪杨明华徐晓风
Owner SUZHOU TAIHU ELECTRIC ADVANCED MATERIAL CO LTD