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Electric insulation polyurethane resin composition and electric or electronic parts

A technology of polyurethane resin and electrical insulation, which is applied in the field of electrical or electronic components and electrical insulating polyurethane resin composition, which can solve the problems of polyurethane resin water resistance and low heat and humidity resistance, and achieve excellent electrical insulation and transparency Good results

Inactive Publication Date: 2003-04-09
DAI ICHI KOGYO SEIYAKU CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, phosphorus-based flame retardants are more easily hydrolyzed than halogen-based flame retardants, and after decomposition, strong acid phosphoric acid is produced.
Phosphoric acid produced causes certain problems and hydrolyzes the urethane resin, resulting in a decrease in the water resistance of the urethane resin
[0005] Especially when used under high temperature and high humidity conditions, polyurethane resin is more likely to be hydrolyzed, so there is a problem that the heat and humidity resistance of the cured product (hardness does not decrease under high temperature and high humidity) is low.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Into 100 g of polyester polyol (hydroxyl value about 160 mg KOH / g) of glyceryl ricinoleate, mix 30 g of diphenylmethane diisocyanate (NCO = 33.6 mol %), 0.05 g of calcium hydroxide and tris(cresyl phosphate) ) and 20 g were mixed, degassed, and the resulting mixture was left in a thermostat at 60° C. for 1 hour to solidify.

[0050] The volume intrinsic resistance value, heat and humidity resistance and flame retardancy of the obtained cured product were measured. The results are shown in Table 1. Comparative example 1

Embodiment 2～9

[0054] Except that the amount of calcium hydroxide and tris(cresyl phosphate) changed as shown in Table 1, all the other were the same as in Example 1 to obtain a cured product.

[0055]

[0056] As clearly shown in Table 1, the cured products obtained in Examples 1 to 9 had improved heat-and-moisture resistance without impairing electrical insulation and flame retardancy. Examples 10-12

Embodiment 10～12

[0057] Example number

[0058] Example number

[0059] As described above, the present invention provides an electrically insulating polyurethane resin composition which is flame-retardant, excellent in hydrolysis resistance, and less likely to cause environmental problems. In addition, the electrical and electronic components of the present invention are packaged with the electrically insulating polyurethane resin composition having the above advantages, so they have excellent moisture resistance, especially moisture and heat resistance, and are suitable for washing machines, toilet seats, water heaters, and water purifiers. etc. electrical and electronic components.

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PUM

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Abstract

To obtain an electrically insulating polyurethane resin composition having excellent flame retardance and resistance against hydrolysis, and having little possibility to cause environmental problems. The electrically insulating polyurethane resin composition comprises an electrically insulating polyurethane resin, a halogen-free phosphorus type flame retarder, and at least one type agent for preventing hydrolysis selected from the group consisting of a metal hydroxide, a metal oxide and a metal carbonate.

Description

field of invention [0001] The present invention relates to an electrically insulating polyurethane resin composition and electric or electronic parts using the same. Specifically, it relates to an electrically insulating polyurethane resin composition having excellent electrical insulating properties, flame retardancy, and hydrolysis resistance, and electric or electronic parts using the electrically insulating polyurethane resin composition. Background technique [0002] Polyurethane resins can be used in various applications, ranging from low-hardness rubber-like elastics to high-crosslinking-density hard resins, by selecting their raw material polyols and polyisocyanates. In particular, it is widely used as a material for electrical insulation because of its excellent heating cycle and operability, low dielectric constant and other properties. [0003] However, in recent years, flame-retardant materials are required from the perspective of fire prevention, especially ele...

Claims

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Application Information

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IPC IPC(8): C08L75/04C08K3/18C08K3/32C08K5/521H01B1/12H01B3/00H01B3/30
Inventor 尾村隆夫末永茂繁中望
Owner DAI ICHI KOGYO SEIYAKU CO LTD
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