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Production process of flame-retardant polyurethane potting material

A production process, polyurethane technology, applied in the field of potting compound, can solve the problems of high hardness of epoxy resin potting compound, small adjustment range of potting compound hardness, slow curing time of potting compound, etc. The effect of little change in performance and low hardness

Inactive Publication Date: 2019-01-25
重庆江川化工(集团)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The epoxy resin potting compound in the prior art mainly has the following deficiencies: 1. The hardness of the epoxy resin potting compound is large, the internal stress is large, and the components are damaged greatly; 2. The Tg point of the epoxy resin potting compound is at 30-50 ℃, it is easy to become soft when heated, and the electrical properties drop sharply; 3. The hardness adjustment range of epoxy resin potting compound is small, and generally, the hardness is relatively large; 4. The curing time of epoxy resin potting compound is average Relatively slow, at least an hour to more than ten hours

Method used

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  • Production process of flame-retardant polyurethane potting material
  • Production process of flame-retardant polyurethane potting material
  • Production process of flame-retardant polyurethane potting material

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Embodiment 1

[0039] The production process of flame-retardant polyurethane potting compound, the production process includes the following steps:

[0040] 1) Prepare raw materials according to the following parts by weight:

[0041]

[0042] 2) Feeding:

[0043] Put the raw materials into the mixing tank in the order of castor oil, 4010 defoamer, black pigment, 4075 defoamer, organotin catalyst, aluminum hydroxide, 110 dispersant, silicon micropowder filler, 307 leveling agent and flame retardant middle;

[0044] 3) Mixing:

[0045] Put the raw materials in the mixing tank, stir to make them fully mixed;

[0046] 4) Abrasives:

[0047] Pass the mixed viscous body in the mixing tank through the pipeline, and grind it to the refining tank;

[0048] 5) Refined:

[0049] 5.1) Pump the ground mixture into the refining kettle through the pipeline, heat up, start stirring and vacuumize;

[0050] 5.2) Control the refining kettle to keep the temperature at 120°C and the vacuum degree ≤ -0...

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Abstract

The invention provides a production process of a flame-retardant polyurethane potting material. The production process comprises the following steps: (1) preparing the following raw materials in partsby weight: 280 parts of castor oil, 2 parts of an antifoaming agent 4010, 1 part of black pigment, 1 part of an antifoaming agent 4075, 0.1 part of an organotin catalyst, 100 parts of aluminum hydroxide, 2 parts of a dispersing agent 110, 315 parts of silicon micropowder filler, 0.1 part of a leveling agent 307 and 300 parts of a flame retardant; (2) feeding; (3) mixing; (4) grinding; (5) refining. The flame-retardant polyurethane potting material has the advantages that 1, the material seldom shrinks during curing; 2, the electrical properties are excellent; 3, the immersion performance is good; 4, cold and heat cycle is realized, so that the material does not easily crack; 5, the Tg point is low, and the electrical properties change little after heating; 6, the material is low in hardness, and can better protect components from internal stress cracking; 7, the material is excellent in flame retardant performance; 8, the Tg point is low.

Description

technical field [0001] The invention relates to the technical field of potting compound, in particular to a production process of flame-retardant polyurethane potting compound. Background technique [0002] The epoxy resin potting compound in the prior art mainly has the following deficiencies: 1. The hardness of the epoxy resin potting compound is large, the internal stress is large, and the components are damaged greatly; 2. The Tg point of the epoxy resin potting compound is at 30-50 ℃, it is easy to become soft when heated, and the electrical properties drop sharply; 3. The hardness adjustment range of epoxy resin potting compound is small, and generally, the hardness is relatively large; 4. The curing time of epoxy resin potting compound is average Relatively slow, at least an hour to more than ten hours. Contents of the invention [0003] Aiming at the deficiencies in the above-mentioned prior art, the present invention provides a production process of flame-retarda...

Claims

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Application Information

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IPC IPC(8): C08G18/67C08K3/22C08K3/36
CPCC08G18/36C08K3/22C08K3/36C08K2003/2227
Inventor 周洋
Owner 重庆江川化工(集团)有限公司
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