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Organic silicon solventless impregnating resin and synthesizing method thereof

A technology of impregnating resin and synthesis method, which is applied in the field of silicone resin and its synthesis, which can solve the problems of large shrinkage, low mechanical strength, and easy cracking of cured products, and achieve reduced shrinkage, simple preparation method, and reduced cracking probability. Effect

Inactive Publication Date: 2016-01-06
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Silicone resin is a commonly used resin at present, widely used in impregnating resins, coatings, mica tape adhesives and other fields, but silicone resin has its own defects, such as large shrinkage, easy cracking and low mechanical strength of cured products. much criticized

Method used

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  • Organic silicon solventless impregnating resin and synthesizing method thereof
  • Organic silicon solventless impregnating resin and synthesizing method thereof
  • Organic silicon solventless impregnating resin and synthesizing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Take 0.6mol a phenyl trichlorosilane, 0.4mol methyl vinyl dichlorosilane, 0.2mol dimethyl dichlorosilane, 0.2mol methylphenyl dichlorosilane, 0.5mol methyl hydrogen dichlorosilane and 0.4mol Trimethylchlorosilane, slowly add the organosilicon monomer dropwise to a flask with rapid stirring at 15°C, drop the hydrolysis reaction for 4 hours, then concentrate, separate the resin layer, and reflux aging at 80°C React for 4 hours, then wash with water until neutral to obtain a hydrolyzed prepolymer, vacuumize the upper resin layer to remove solvent and remove low boilers, then add 0.06g isopropanol-coordinated platinum catalyst and 0.12g vinyl ring Hexyl alcohol, stirred evenly, promptly discharged to obtain the product, the schematic structural formula of the obtained product is as follows structure (Ⅲ).

[0024]

Embodiment 2

[0026] Take 0.5mol phenyltrimethoxysilane, 0.2mol methyltrichlorosilane, 0.2mol methylvinyldichlorosilane, 0.1mol dimethyldiethoxysilane, 0.2mol diphenyldimethoxysilane solid, 0.3mol methylhydrogendiethoxysilane, 0.5mol dimethylvinylmethoxysilane and 0.1mol trimethylchlorosilane, slowly add the organosilicon monomer dropwise at a temperature of 50°C with rapid stirring In the flask, add dropwise hydrolysis reaction for 3 hours, then concentrate, separate the resin layer, reflux aging reaction at 100°C for 4 hours, then wash with water until neutral to obtain a hydrolyzed prepolymer, and carry out the upper resin layer Vacuumize the solvent and remove the low boilers, then add 0.08g of platinum catalyst coordinated by vinyl double head and 0.22g of NN-dimethylacetamide, stir evenly, and then discharge the product to obtain the product. The schematic structural formula of the obtained product is as follows: (Ⅳ).

[0027]

Embodiment 3

[0029] Take 0.4mol phenyltrimethoxysilane, 0.4mol methylvinyldichlorosilane, 0.2mol dimethyldiethoxysilane, 0.1mol methylphenyldichlorosilane monomer, 0.6mol methylhydrogen dichlorosilane Chlorosilane and 0.3mol dimethylvinylmethoxysilane, slowly add the organosilicon monomer dropwise to a flask with rapid stirring at 20°C, drop the hydrolysis reaction for 5 hours, then concentrate, and the resin layer Separated, reflux aging reaction at 120°C for 4 hours, then washed with water until neutral to obtain a hydrolyzed prepolymer, vacuumed the upper resin layer to remove solvent and low boilers, and then added 0.03g of vinyl cyclotetrasilicon The oxane-coordinated platinum catalyst and 0.08 g of triphenylphosphine were stirred evenly, and the product was discharged to obtain the product. The schematic structural formula of the obtained product was as follows structure (Ⅴ).

[0030]

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Abstract

The invention discloses organic silicon solventless impregnating resin and a synthesizing method thereof. The method includes the steps of synthesizing organic silicon resin prepolymer, compounding impregnating resin and the like. The organic silicon solventless impregnating resin has low viscosity, uses no organic solvent as medium, and belongs to pollution-free green and environment-friendly insulating materials; after being cured into film, the resin is free of low-molecular-weight polymer prolapse, excellent in electrical performance, free of pollution, good in comprehensive performance, good in application processing property and suitable for vacuum pressure impregnation insulation treatment of motor, transformer or other devices. Meanwhile, the obtained product cured in a die with the diameter of 100 cm has the size about 99.8 cm; generally, the cured product obtained by compounding component A silicon vinyl and component B silicon hydrogen has the size about 98.5 cm, and therefore shrinkage percentage is greatly decreased, the cured product cracking probability is greatly lowered, and the low-shrinkage and low-crack excellent performance is achieved.

Description

technical field [0001] The invention relates to a silicone resin and a synthesis method thereof; specifically, the invention relates to a low-shrinkage, crack-resistant silicone solvent-free impregnating resin and a synthesis method thereof. technical background [0002] Silicone resin is a commonly used resin at present, widely used in impregnating resins, coatings, mica tape adhesives and other fields, but silicone resin has its own defects, such as large shrinkage, easy cracking and low mechanical strength of cured products. Much criticized. [0003] Silicone hydrosilicon addition resin products are a large category of products in the silicone system, which obtain the final cured product through the addition reaction between silicon vinyl and silicon hydrogen, usually composed of silicon vinyl components It is composed of silicon hydrogen component (commonly named as component AB). Experiments have found that the silicone addition product composed of component AB has a l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G77/24C08G77/20C08G77/12C08G77/08C08G77/06
Inventor 张海良李强军姜其斌
Owner XIANGTAN UNIV
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