Addition type liquid silicone rubber and manufacturing method thereof

A liquid silicone rubber, addition molding technology, applied in the field of silicone liquid rubber, can solve the problem of not meeting the comprehensive performance requirements of silicone rubber such as strength, elasticity, viscosity and light transmittance, and achieves easy industrial application, easy construction, Simple and easy to operate effect

Active Publication Date: 2015-03-25
GUANGZHOU BAIYUN CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] It can be seen that the existing addition-type liquid silicone rubber cannot meet the comprehensive performance requirements of silicone rubber in the field of electronic packaging and potting, such as strength, elasticity, viscosity and light transmittance.

Method used

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  • Addition type liquid silicone rubber and manufacturing method thereof
  • Addition type liquid silicone rubber and manufacturing method thereof
  • Addition type liquid silicone rubber and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A kind of addition-type liquid silicone rubber of the present embodiment comprises the following raw materials in parts by weight:

[0031]

[0032] The viscosity of the vinyl-terminated polydimethylsiloxane is 5000mPa.s;

[0033] The chain extender is terminal hydrogen-containing silicone oil, and the general structural formula is (HMe 2 )Si(Me 2 SiO) n Si(Me 2 H), the viscosity is 150mPa.s;

[0034] The hydrogen-containing silicone oil contains at least 3 Si-H in each molecule, the viscosity is 50mPa.s, and the hydrogen content is 0.05%;

[0035] The structural formula of described vinyl MDQ silicone resin is as follows: (ViMe 2 SiO 1 / 2 )a(Me 3 SiO 1 / 2 ) b (Me 2 SiO) c (SiO 2 ) d , in the formula: (a+b) / d=0.5, c / d=0.5, the massfraction of Vi is 0.5%;

[0036] The inhibitor is 1-ethynyl-1-cyclohexanol;

[0037] The catalyst is chloroplatinic acid-isopropanol complex.

[0038] The preparation method of above-mentioned addition type liquid silicone rub...

Embodiment 2

[0043] A kind of addition-type liquid silicone rubber of the present embodiment comprises the following raw materials in parts by weight:

[0044]

[0045] The viscosity of the vinyl-terminated polydimethylsiloxane is 10000mPa.s;

[0046] The chain extender is terminal hydrogen-containing silicone oil, and the general structural formula is (HMe 2 )Si(Me 2 SiO) n Si(Me 2 H), the viscosity is 500mPa.s;

[0047] The hydrogen-containing silicone oil contains at least 3 Si-H in each molecule, has a viscosity of 150mPa.s, and contains 0.3% hydrogen;

[0048] The structural formula of described vinyl MDQ silicone resin is as follows: (ViMe 2 SiO 1 / 2 )a(Me 3 SiO 1 / 2 ) b (Me 2 SiO) c (SiO 2 ) d , where: (a+b) / d=0.8, c / d=1.0, the massfraction of Vi is 0.7%;

[0049] The inhibitor is 2-methyl-3-butynyl-2-alcohol;

[0050] The catalyst is chloroplatinic acid-divinyltetramethyldisiloxane complex.

[0051] The preparation method of above-mentioned addition type liquid sil...

Embodiment 3

[0056] A kind of addition-type liquid silicone rubber of the present embodiment comprises the following raw materials in parts by weight:

[0057]

[0058] The viscosity of the vinyl-terminated polydimethylsiloxane is 12000mPa.s;

[0059] The chain extender is terminal hydrogen-containing silicone oil, and the general structural formula is (HMe 2 )Si(Me 2 SiO) n Si(Me 2 H), the viscosity is 400mPa.s;

[0060] The hydrogen-containing silicone oil contains at least 3 Si-H in each molecule, the viscosity is 500mPa.s, and the hydrogen content is 1.2%;

[0061] The structural formula of described vinyl MDQ silicone resin is as follows: (ViMe 2 SiO 1 / 2 )a(Me 3 SiO 1 / 2 ) b (Me 2 SiO) c (SiO 2 ) d , where: (a+b) / d=1.5, c / d=0.6, the mass fraction of Vi is 2.0%;

[0062] The inhibitor is 3-methyl-1-dodeyn-3-ol;

[0063] The catalyst is chloroplatinic acid-divinyltetramethyldisiloxane complex.

[0064] The preparation method of above-mentioned addition type liquid silico...

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Abstract

The invention discloses addition type liquid silicone rubber and a manufacturing method of the addition type liquid silicone rubber. The addition type liquid silicone rubber comprises the following raw materials, by weight, 100 parts of vinyl end silicone oil, 10 parts to 45 parts of chain extender, five parts to ten parts of hydrogen-containing silicone oil, five parts to 30 parts of vinyl MDQ silicon resin, 0.02 part to 0.6 part of inhibitor and 0.05 par to 0.5 part of catalysts. The viscosity of the vinyl end silicone oil is 5,000 mPa.s to 20,000 mPa.s. According to the addition type liquid silicone rubber, on the basis of guaranteeing low system viscosity, high elasticity is achieved, strength is high, transparency is good, the light transmittance exceeds 96 percent, and the addition type liquid silicone rubber can be used as packaging materials in the field of electronic industry.

Description

technical field [0001] The invention relates to the field of silicone liquid rubber, in particular to an addition-type liquid silicone rubber and a preparation method thereof. Background technique [0002] Addition liquid silicone rubber has high and low temperature resistance, electrical insulation, no by-products during curing, small thermal expansion coefficient, small shrinkage rate, non-toxic, tasteless, non-corrosive, good shockproof, sealing, moisture-proof performance, and physiological Inert, has a wide range of applications in automotive, electronic appliances, aerospace, medical and medical fields. [0003] Silicone rubber used in the field of electronic packaging and potting requires high strength and elasticity on the one hand, and low viscosity and high light transmittance on the other hand. The prior art discloses an addition-type liquid silicone rubber with a tensile strength of 9 MPa and an elongation at break of 800%, which has excellent strength and elast...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/07C08L83/05C08J3/24
CPCC08L83/04C08G77/12C08G77/20C08L83/00C08K5/56C08K5/05
Inventor 刘光华陈建军付子恩陈弘黄恒超高敏华
Owner GUANGZHOU BAIYUN CHEM IND
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