Polyurethane potting material with high insulation and hydrolysis resistance and preparation method thereof

A potting material and high insulation technology, which is applied in the field of high insulation and hydrolysis-resistant polyurethane potting materials and its preparation, can solve the problems of shelf life and use effect, too fast reaction speed, and large amount of addition. Achieve excellent hydrolysis resistance, less air bubbles and moderate viscosity

Inactive Publication Date: 2016-05-11
上海赛沃化工材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the catalyst is added to component B (MDI system), there is a risk of shelf life and use effect, and the amount added is very large, the reaction speed is too fast, the operation time is short, and the casting personnel have higher requirements for the product.

Method used

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  • Polyurethane potting material with high insulation and hydrolysis resistance and preparation method thereof
  • Polyurethane potting material with high insulation and hydrolysis resistance and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] This embodiment relates to a polyurethane potting material with high insulation and hydrolysis resistance; the polyurethane potting material is a two-component; wherein, measured by weight percentage, component A is composed of 44% castor oil, 3.5% polymer Ether polyol, 1% chain extender, 7.25% desiccant, 44% filler, 0.05% catalyst, 0.1% yellow color paste, 0.1% defoamer; component B is 100% more Isocyanates.

[0036] The preparation method of the polyurethane potting material of the present embodiment is as follows:

[0037]Component A: Weigh 44kg of castor oil (hydroxyl value 162mgKOH / g), 3.5kg of polyoxypropylene glycol (hydroxyl value 110mgKOH / g) and 1kg of 1,2 propylene glycol in a 150L stirred tank, and stir at 120°C for 2h , while vacuum degassing (vacuum pressure -0.1Mpa); add 0.1kg of defoamer, 0.05kg of stannous octoate and stir for 0.5h, then add 7.25kg of 4A molecular sieve, 0.1kg of yellow color paste, calcium carbonate (pre-baked at 120°C for 24h After) ...

Embodiment 2

[0041] This embodiment relates to a high-insulation and hydrolysis-resistant polyurethane potting material; the polyurethane potting material is a two-component; wherein, the composition is measured by weight percentage, and component A is composed of 45.5% castor oil, 3% poly Ether polyol, 1.5% chain extender, 10% desiccant, 39.78% filler, 0.02% catalyst, 0.1% yellow colorant, 0.1% defoamer; B component is 100% poly isocyanate.

[0042] The preparation method of the polyurethane potting material of the present embodiment is specifically as follows:

[0043] Component A: Weigh 45.5kg of castor oil (hydroxyl value 162mgKOH / g), 3kg of polyoxypropylene triol (hydroxyl value 110mgKOH / g) and 1.5kg of 1,4-butanediol in a 150L stirred tank, at 120°C Stir under pressure for 1.5h, while vacuum degassing (vacuum pressure-0.1Mpa); add 0.1kg of defoamer, 0.02kg of stannous octoate and stir for 0.5h, then add 10kg of 4A molecular sieve, 0.1kg of yellow color paste, silicon micropowder (pr...

Embodiment 3

[0047] This embodiment relates to a high-insulation and hydrolysis-resistant polyurethane potting material; the polyurethane potting material is two-component; wherein, the composition is measured by weight percentage, and component A is composed of 50% castor oil, 2% poly Ether polyol, 2% chain extender, 6.5% desiccant, 39.2% filler, 0.1% catalyst, 0.1% yellow color paste, 0.1% defoamer; B component is 100% poly isocyanate.

[0048] The preparation method of the polyurethane potting material of the present embodiment is specifically as follows:

[0049] Component A: Weigh 50kg of castor oil (hydroxyl value 162mgKOH / g), 2kg of polypropylene glycol (hydroxyl value 110mgKOH / g) and 2kg of trimethylolpropane in a 150L stirred tank, stir at 120°C for 2h, and vacuum Degassing (vacuum pressure -0.1Mpa); add 0.1kg of defoamer, 0.1kg of stannous octoate and stir for 0.5h, then add 6.5kg of 4A molecular sieve, 0.1kg of yellow color paste, talcum powder (after pre-baking at 120°C for 24...

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Abstract

The invention discloses a high-insulation hydrolysis-preventing polyurethane filling and sealing material and a preparation method thereof. The polyurethane filling and sealing material is a dual-component material and consists of the following components in percentage by weight: a component A: 40%-50% of castor oil, 3%-5.5% of polyether polyol, 0.5%-2% of chain extender, 5%-12% of dryer, 37%-44% of filler, 0.02%-0.1% of catalyst, 0.1% of yellow color paste and 0.1% of defoaming agent; and a component B: 100% of polyisocyanates. The filling and sealing material provided by the invention is moderate in viscosity, capable of being cured at a normal temperature, less in air bubbles, bright and beautiful in appearance, changeable in curing time with changes of dosage of the catalyst, and convenient to regulate; after being cured, the material has good electrical insulation, hydrolysis resistance, and high tensile strength; and moreover, the filling and sealing material is applicable to filling and sealing protection in high-temperature high-humidity environments such as south China, Southeast Asia, and the like, which need underground high-voltage cable joints and outdoor high-voltage cable joints.

Description

technical field [0001] The invention relates to a polyurethane potting material, in particular to a polyurethane potting material with high insulation and hydrolysis resistance and a preparation method thereof. Background technique [0002] Polyurethane potting material: The full name of polyurethane is polyurethane, which is a general term for macromolecular compounds containing repeating urethane groups (NHC00-) on the main chain. It is composed of organic diisocyanate or polyisocyanate and dihydroxy or Polyhydroxy compounds and small molecular polyols or polyamines are formed by addition polymerization of chain extenders. The hydroxyl compounds are mainly composed of polymers such as polyester, polyether and hydroxyl-terminated polydiene. Polyurethane potting material has excellent electrical insulation, and its cohesive energy is large. Because it contains isocyanate groups and urethane groups with strong polarity and high chemical activity, it has good properties for va...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/67C08G18/66C08G18/48C08L75/08
CPCC08G18/36C08G18/6696C08L75/08
Inventor 陈长青黄荣马培培
Owner 上海赛沃化工材料有限公司
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