Tackifier and preparation thereof as well as adhesion addition type liquid silicone rubber and preparation thereof

A technology of liquid silicone rubber and addition type, applied in the field of adhesive addition type liquid silicone rubber and its preparation, can solve the problems of slow curing speed at room temperature, limited application scope, etc., achieve short curing time, expand application scope, and yield high effect

Active Publication Date: 2015-12-09
广东皓明有机硅材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned carbon-carbon double bond-containing tackifiers are small molecules of unsaturated olefins, which often have a significant inhibitory effect on the platinum catalyst for addition-type liquid silicone rubber, resulting in very slow curing at room temperature, requiring heating to cure and use, which limits its use. Application range

Method used

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  • Tackifier and preparation thereof as well as adhesion addition type liquid silicone rubber and preparation thereof
  • Tackifier and preparation thereof as well as adhesion addition type liquid silicone rubber and preparation thereof
  • Tackifier and preparation thereof as well as adhesion addition type liquid silicone rubber and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Embodiment 1, the present invention is used for the tackifier of addition-type liquid silicone rubber and its preparation

[0036] S1. Under the catalysis of 50 parts by mass of methyldimethoxyhydrogensilane and 70 parts by mass of dimethyldimethoxysilane under the catalysis of 12 parts by mass of hydrochloric acid solution with a mass fraction of 0.4%, hydrolysis reaction at 40°C 2h, condensation reaction at 50°C for 4h, then neutralization, drying to remove water, liquid separation, filtration, and vacuum distillation to obtain 63.5 parts by mass of hydroxy-terminated methylhydrogensilane;

[0037] The structural formula of the hydroxy-terminated methylhydrogen silane is as follows:

[0038]

[0039] In the formula, m=9, n=7.

[0040] S2. Combine 22 parts by mass of hydroxy-terminated methylhydrogensilane prepared in step S1 with 6 parts by mass of γ-(2,3-epoxypropoxy)propyltrimethoxysilane, 6 parts by mass of γ-(methacryloyloxy ) Propyltrimethoxysilane was cataly...

Embodiment 2

[0044] Embodiment 2, the present invention is used for the tackifier of addition-type liquid silicone rubber and preparation thereof

[0045] S1. Under the catalysis of 60 parts by mass of methyldimethoxyhydrogensilane and 80 parts by mass of dimethyldimethoxysilane under the catalysis of 17 parts by mass of hydrochloric acid solution with a mass fraction of 0.3%, hydrolysis reaction at 50 °C 2h, condensation reaction at 55°C for 4h, then neutralization, drying to remove water, liquid separation, filtration, and vacuum distillation to obtain 76.9 parts by mass of hydroxy-terminated methylhydrogensilane;

[0046] The structural formula of the hydroxy-terminated methylhydrogen silane is as follows:

[0047]

[0048] In the formula, m=9, n=8.

[0049] S2. Combine 27 parts by mass of hydroxy-terminated methylhydrogensilane prepared in step S1 with 8 parts by mass of γ-(2,3-epoxypropoxy)propyltrimethoxysilane, 8 parts by mass of γ-(methacryloyloxy ) Propyltrimethoxysilane wa...

Embodiment 3

[0053] Embodiment 3, the present invention is used for the tackifier of addition-type liquid silicone rubber and its preparation

[0054] S1. Under the catalysis of 70 parts by mass of methyldimethoxyhydrogensilane and 90 parts by mass of dimethyldimethoxysilane under the catalysis of 22 parts by mass of hydrochloric acid solution with a mass fraction of 0.2%, hydrolysis reaction at 55°C 2h, condensation reaction at 60°C for 4h, then neutralization, drying to remove water, liquid separation, filtration, and vacuum distillation to obtain 88.4 parts by mass of hydroxy-terminated methylhydrogensilane;

[0055] The structural formula of the hydroxy-terminated methylhydrogen silane is as follows:

[0056]

[0057] In the formula, m=11, n=9.

[0058] S2. Combine 33 parts by mass of hydroxy-terminated methylhydrogensilane prepared in step S1 with 11 parts by mass of γ-(2,3-epoxypropoxy)propyltrimethoxysilane, 11 parts by mass of γ-(methacryloyloxy ) Propyltrimethoxysilane was ...

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Abstract

The invention belongs to the technical field of electronic element encapsulating materials, and specifically relates to a tackifier for addition type liquid silicone rubber and a preparation method thereof as well as adhesion addition type liquid silicone rubber containing the tackifier and a preparation method thereof. In a general structural formula of the tackifier, which is shown in the specification, m+n is equal to 15 to 20. The adhesion addition type liquid silicone rubber containing the tackifier has the advantages of good flowing property, high curing speed at room temperature, excellent heat-conducting property after curing and good adhesion property to aluminum products, glass, stainless steel, PA, PVC and ABS materials.

Description

technical field [0001] The invention belongs to the technical field of potting materials for electronic components, in particular to a tackifier for addition-type liquid silicone rubber and a preparation method thereof, and an adhesive addition-type liquid silicone rubber containing the tackifier and its preparation method. Background technique [0002] Silicone rubber has many advantages such as good high and low temperature resistance, weather resistance, insulation and physiological inertia, and is widely used in various fields of national economy. In particular, addition-type liquid silicone rubber has low viscosity, good fluidity, no by-products during curing, and low shrinkage. It has been widely used in the field of potting and sealing of electronic components in recent years. However, addition-type liquid silicone rubber is a highly saturated non-polar rubber with low molecular surface energy and poor adhesion to electronic component housing materials, resulting in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G77/06C08G77/12C08G77/14C08G77/20C08L83/07C08L83/05C08L83/06C08K9/06C08K3/22C08K3/36
Inventor 程宪涛张利利吴向荣靳利敏李清
Owner 广东皓明有机硅材料有限公司
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