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A kind of impregnation resin composition and its application
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A technology for impregnating resins and compositions, which is applied in the direction of epoxy resin coatings, coatings, fireproof coatings, etc., which can solve the problems of poor storage stability, incompatible performance, and low curing rate, and achieve high curing rate and excellent heat resistance Performance, the effect of short curing time
Inactive Publication Date: 2019-06-21
ZHUZHOU TIMES NEW MATERIALS TECH
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Problems solved by technology
[0003] In the existing epoxy impregnating resin system, the resin with good storage stability tends to have a slow curing rate, while the resin with a fast curing rate has poor storage stability. To some extent, the two properties cannot be combined
Chinese patent CN1513893A proposes to use urea derivatives and guanidine derivatives as curing agents for epoxy resins. Although the curing rate is accelerated, the storage stability at room temperature and 60°C is poor.
Chinese patent CN101157817A proposes to adopt chromium acetylacetonate as the curing accelerator of epoxy resin. Although it has obtained better storage stability, its curing rate is low and needs to be cured at a higher temperature.
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Embodiment 1
[0028] A kind of impregnation resin composition of the present invention, comprises the component of following weight percent:
[0029]
[0030] The preparation process of the impregnation resin composition of the present embodiment comprises the following steps: Weigh 40g bisphenol A epoxy resin, add 3.5g o-cresol novolac epoxy resin, 10g diphenyl ether type bismaleimide, 6.5g bisphenol A Phenol A benzoxazine resin, heated to 100°C, stirred evenly, then cooled to 60°C, added 6.5g p-tert-butylphenyl glycidyl ether, 0.5g dicumyl peroxide, 0.05g p-phenylene Phenol, 32g methyl tetrahydrophthalic anhydride, 0.5g polyhydroxyethyl methyl methacrylate-N-isopropyl acrylamide block copolymer (i.e. curing accelerator PHEMA m -b-PNIPAM n , whose molecular weight is 2000-3500, m is 10, n is 14), and fully stirred evenly to obtain impregnated resin composition.
[0031] Apply the impregnated resin composition of this example to the motor insulation treatment: the motor is first impreg...
Embodiment 2
[0033] A kind of impregnation resin composition of the present invention, comprises the component of following mass fraction:
[0034]
[0035]The preparation process of the impregnation resin composition of the present embodiment comprises the following steps: take by weighing 40g bisphenol F epoxy resin, add 12g diphenylmethane type bismaleimide, 7g polyetheramine type benzoxazine resin, heat To 100°C, stir evenly, then lower the temperature to 60°C, add 7g neopentyl glycol diglycidyl ether, 0.8g di-tert-butyl peroxide, 0.1g tert-butylhydroquinone, 30g methyltetrahydrophthalic anhydride , 2g methyl nadic acid anhydride, 1g polyhydroxyethyl methyl methacrylate-N-isopropyl acrylamide block copolymer (i.e. curing accelerator PHEMA m -b-PNIPAM n , the molecular weight of which is 2500-3500, m is 10, n is 16), fully stirred evenly to obtain impregnated resin composition.
[0036] Apply the impregnated resin composition of this example to the motor insulation treatment: the m...
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Abstract
The invention discloses an impregnating resin composition. The impregnating resin composition comprises the following components in percentage by weight: 35-45% of epoxy resin, 8-15% of bismaleimide, 5-10% of benzoxazine, 5-10% of reactive diluent, 0.5-1.5% of an initiator, 0.05-0.5% of a polymerization inhibitor, 0.5-3% of a curing accelerator and 25-40% of acid anhydride. The impregnating resin composition disclosed by the invention has excellent heat resistance and electrical performance, especially has the characteristics of low curing temperature, high curing rate, short curing time and good storage stability, is applicable to insulating treatment of the fields of motor stator coils, large-scale motors, high-voltage motors and traction motors and is especially applicable to a VPI impregnation technology with high resin viscosity and requiring heating impregnation.
Description
technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to an impregnating resin composition. Background technique [0002] The insulation system is the heart of the motor, and its performance directly affects the reliability and operating life of the motor. As one of the key materials of the motor insulation system, the impregnating resin must not only have excellent heat resistance, high temperature electrical properties, etc., but also have better storage stability to meet the needs of a longer application period of the product. [0003] In the existing epoxy impregnating resin system, the resin with good storage stability often has a slow curing rate, while the resin with a fast curing rate has poor storage stability. To some extent, the two properties cannot be combined. Chinese patent CN1513893A proposes to use urea derivatives and guanidine derivatives as curing agents for epoxy resins. Although the curing r...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information
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