Tackifier for addition type organosilicon impregnating resin and preparation method thereof

A technology of silicone impregnation and tackifier, applied in the field of silicone polymer materials, can solve the problems of unsatisfactory bonding effect, affecting product transparency, reducing matrix hardness, etc., achieving easy industrial production, excellent heat resistance, The effect of improving adhesive properties

Active Publication Date: 2016-11-23
NEW MATERIAL INST OF SHANDONG ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing problems are: the adhesion effect of the tackifier containing vinyl structure is not ideal after use, and the tackifier containing hydrogen-based structure has poor compatibility with the silicone matrix, and the system tends to become turbid after adding, which affects the product. Transparency, reduction of matrix hardness, mechanical strength, etc.

Method used

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  • Tackifier for addition type organosilicon impregnating resin and preparation method thereof
  • Tackifier for addition type organosilicon impregnating resin and preparation method thereof
  • Tackifier for addition type organosilicon impregnating resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Add 193 g of water, 145 g of toluene, 65 g of ethyl acetate, and 12 g of 37% concentrated hydrochloric acid into the reaction flask. Weigh 356.2g phenyltrimethoxysilane, 138.46g methylhydrogendimethoxysilane, 7.6g dimethylvinylmethoxysilane, 106.4g methylvinyldimethoxysilane, 22.5g ethylene Trimethoxysilane and 82.7g of γ-glycidoxypropyltrimethoxysilane were evenly mixed and dropped into the reaction bottle, and the temperature of the reaction system was controlled not to be higher than 20°C. After the dropwise addition, react at room temperature for 0.5h, then raise the temperature to reflux, and react at about 75-80°C for 4h; after the reaction, take out the organic layer, wash with water until neutral, add anhydrous calcium chloride to dry for at least 5h, remove the solvent and Small molecules, to obtain the target product.

Embodiment 2

[0027] Add 193g of water, 145g of toluene, 65g of ethyl acetate, and 12g of concentrated hydrochloric acid into the reaction bottle. Weigh 322.3g phenyltrimethoxysilane, 46g methylphenyldimethoxysilane, 138.46g methylhydrogendimethoxysilane, 6.2g dimethylvinylmethoxysilane, 136.85g methyl Vinyldimethoxysilane, 47.2g γ-glycidoxypropyltrimethoxysilane, 37.3g γ-methacryloxypropyltrimethoxysilane were evenly mixed and dropped into the reaction bottle, and the temperature of the reaction system was controlled. higher than 20°C. After the dropwise addition, react at room temperature for 1 hour, then raise the temperature to 80-85°C for reflux reaction for 4 hours; take out the organic layer after the reaction, wash with water until neutral, add anhydrous calcium chloride to dry for at least 5 hours, remove the solvent and small molecules under reduced pressure, Obtain the target product.

Embodiment 3

[0029] Add 193g, 145g of toluene, 65g of ethyl acetate, and 1.5g of trifluoromethanesulfonic acid into the reaction bottle. Weigh 356.2g phenyltrimethoxysilane, 138.46g methylhydrogendimethoxysilane, 6.2g dimethylvinylmethoxysilane, 136.85g methylvinyldimethoxysilane, 42.5gγ- Glycidoxypropyltrimethoxysilane and 34.88g of 3-isocyanatopropyltrimethoxysilane were evenly mixed and dropped into the reaction bottle, and the temperature of the reaction system was controlled not to be higher than 20°C. After the dropwise addition, react at room temperature for 0.5h, then raise the temperature to 75-80°C for reflux reaction for 4h; after the reaction, take out the organic layer, wash with water until neutral, add anhydrous calcium chloride to dry for at least 5h, remove the solvent and small molecules under reduced pressure , to obtain the target product.

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Abstract

The invention relates to a tackifier for addition type organosilicon impregnating resin and a preparation method thereof. The molecular formula of the tackifier is (Me2R1SiO0.5)a(MeR2SiO)b(PhSiO1.5)c(R3SiO1.5)d, wherein a, b, c and d represent the mole number of each chain link of the tackifier; and it is at least guaranteed that in R1 and R2, vinyl and hydrogen groups coexist. The tackifier is obtained by hydrolytic condensation of silane monomers containing hydrogen groups, vinyl, phenyl groups and other reactive groups under the effect of a catalyst. The prepared tackifier can remarkably improve high temperature adhesive properties of the addition type organosilicon impregnating resin, the tackifier and the impregnating resin are good in compatibility, the appearance, hardness and other mechanical properties of the resin are not affected after the mixing, and the tackifier has important application to motor and engine insulation impregnation.

Description

technical field [0001] The invention relates to a tackifier for silicone impregnated resin, in particular to an addition-type tackifier for silicone impregnated resin and a preparation method thereof, belonging to the technical field of silicone polymer materials. Background technique [0002] Silicone impregnated resin is an insulating material based on silicone resin, composed of Si-CH=CH 2 Addition reaction with polymethylphenylsiloxane of Si-H group occurs under platinum catalysis and then cross-linking and curing. The advantages of silicone impregnated resin are high heat resistance, good insulation, and excellent moisture resistance, cold resistance and weather resistance. However, most of the surface groups of addition-type silicone impregnated resins are non-polar organic groups after curing, with few reactive groups and low surface energy, and the bonding performance with the substrate needs to be improved. Good adhesion between the impregnating resin and the base...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G77/20C08G77/14C08G77/26
CPCC08G77/14C08G77/20C08G77/26
Inventor 牟秋红彭丹李金辉李冰王峰张方志
Owner NEW MATERIAL INST OF SHANDONG ACADEMY OF SCI
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