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High-temperature and high-moisture resistant coating for metalster and preparation method thereof

A technology of metal film resistors and high temperature resistance, which is applied in the direction of fireproof coatings, epoxy resin coatings, coatings, etc., can solve the problems of moisture resistance and heat resistance that cannot meet the needs of special fields, and achieve high temperature resistance and high temperature resistance Excellent wet performance, smooth film-forming surface, and good high-humidity resistance

Inactive Publication Date: 2010-10-27
TIANJIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the moisture resistance and heat resistance of domestically produced coatings cannot meet the needs of special fields.

Method used

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  • High-temperature and high-moisture resistant coating for metalster and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Prepare according to the following mass ratio:

[0022] Coating base: bisphenol A type epoxy resin E-20 30%,

[0023] Methylhexahydrophthalic anhydride 19.5%.

[0024] Ethylene glycol 8%

[0025] Butanediol 2%,

[0026] Accelerator Hexamethyldisilazane 1.5%,

[0027] nano-SiO 2 2%,

[0028] Diluent absolute ethanol 37%.

[0029] Specific operation: measure according to the formula, mix epoxy resin, acid anhydride curing, polyol and absolute ethanol at room temperature, and disperse nano-SiO 2 The absolute ethanol suspension is added to the above mixture and mixed evenly, and the specific gravity of the coating is adjusted with diluent absolute ethanol under stirring conditions to be suitable for coating metal film resistors on the production line. The inner surface is cured and dried at 170°C for 2 minutes, and completely cured and dried within 45 minutes.

[0030] The high-temperature and high-humidity environment simulation test is ca...

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Abstract

The invention relates to a high-temperature and high-moisture resistant coating for metalster and a preparation method thereof. The coating is prepared by adopting epoxide resin and anhydride curing agent which are used as base materials, mixed dihydric alcohol and an inorganic nano modified material as raw materials and absolute ethyl alcohol as dissolvent, and includes the components according to mass percentage: 35 to 60 percent of epoxide resin and anhydride curing agent, 5 to 20 percent of mixed dihydric alcohol, 1.5 to 10 percent of accelerant hexamethyldisilazane, 1.5 to 10 percent of nano-SiO2 and 20 to 57 percent of absolute ethyl alcohol. The coating has the characteristics of fine environmental protection and filming property, smooth, compact and imperforate surface of formed film, and good high-temperature and high-moisture resistance. After the experiments of high temperature resistance and high-moisture resistance are carried out, the variance ratio of resistance delta Rto R is lower than 0.4 percent. The coating is especially suitable for coating the high performance metalster.

Description

technical field [0001] The invention relates to electronic information material technology, in particular to a high-temperature-resistant and high-humidity-resistant coating for metal film resistors and a preparation method thereof, in particular to an EP / nano-SiO coating for metal film resistors 2 High temperature and high humidity resistant coatings. Background technique [0002] In the field of aerospace, due to the very harsh working environment, there are relatively strict requirements on the stability of electronic components under severe conditions. As a precision resistor, metal film resistors are widely used in precision electronic equipment, but for metal film resistors that have been in high temperature and humid environments for a long time, high temperature and humidity are relatively harsh environmental conditions. The stability of metal film resistors in high temperature and humid environments is directly related to the functional paint protection film on its...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D163/02C09D7/12C09D5/18
Inventor 王秀宇张之圣白天
Owner TIANJIN UNIV
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