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Single-component addition-type silicone rubber and preparation method thereof

An addition type, silicone rubber technology, applied in the field of one-component addition type silicone rubber and its preparation, can solve the problems of reducing the use value of the original package, poor low temperature resistance of the silicone rubber, corrosion of the package components, etc., and achieves low cost and good quality. The effect of high temperature resistance and low temperature aging resistance and good mechanical properties

Active Publication Date: 2015-06-24
ZHUZHOU TIMES ELECTRIC INSULATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The prior art discloses a variety of methods for improving the heat resistance of silicone rubber. For example, the heat resistance temperature of phenylene rubber can reach 400°C, but this type of silicone rubber has poor low temperature resistance and is expensive; the Chinese patent application number 200610036843.2 discloses Using iron oxide and cerium-rich rare earth oxide as additives, a one-component condensation type heat-resistant silicone rubber is prepared, but the small molecular substances produced by vulcanization have a corrosive effect on packaging components, thereby reducing the use of packaging components. value

Method used

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  • Single-component addition-type silicone rubber and preparation method thereof
  • Single-component addition-type silicone rubber and preparation method thereof
  • Single-component addition-type silicone rubber and preparation method thereof

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preparation example Construction

[0077] The present invention also provides a preparation method of one-component addition type silicone rubber, comprising the following steps:

[0078] 20-50 parts by mass of vinyl polysiloxane, 3-18 parts by mass of vinylmethylphenylpolysiloxane, 40-70 parts by mass of filler, 2.0-10 parts by mass of additives and 0.5- 3.0 parts by mass of tackifier are mixed to obtain the first mixture;

[0079] Mixing 0.01-0.1 parts by mass of platinum catalyst, 0.3-2.5 parts by mass of inhibitor and 4-20 parts by mass of hydrogen-containing polysiloxane to obtain a second mixture;

[0080] The first mixture and the second mixture are mixed, defoamed and vulcanized to obtain a one-component addition type silicone rubber.

[0081] In the present invention, 20-50 parts by mass of vinyl polysiloxane, 3-18 parts by mass of vinylmethylphenyl polysiloxane, 40-70 parts by mass of filler, 2.0-10 parts by mass of additive Mix with 0.5-3.0 parts by mass of tackifier to obtain the first mixture. T...

Embodiment 1

[0096] Add 400g of vinyl polysiloxane (viscosity 500mPa·s, vinyl mass fraction 0.68%) to a planetary mixer with a volume of 2 liters, and then add 200g of vinylmethylphenyl polysiloxane (viscosity 400mPa·s s, vinyl mass fraction 0.55%, phenyl mass fraction 3.2%), then add 300g of quartz powder with a particle size of 5μm, 250g of alumina with a particle size of 10μm, 40g of iron oxide red and 10g of hexamethyldisilica The azane-treated fumed silica was stirred for 30 minutes under a vacuum of -0.098 MPa, then 16 g of vinyltriethoxysilane was added, and the vacuum was stirred for 60 minutes under a vacuum of -0.098 MPa, and the machine was shut down. Discharging to obtain the first mixture.

[0097] 0.2g of methylvinyl polysiloxane complexed platinum catalyst (Pt mass fraction is 5000ppm), 4.0g of ethynylcyclohexanol and 100g of hydrogen-containing polysiloxane (viscosity of 40mPa s, silicon-hydrogen bond -H mass fraction 0.38%) were uniformly mixed under the condition of vacu...

Embodiment 2

[0101] Add 400g of vinyl polysiloxane (viscosity of 1000mPa s, vinyl mass fraction 0.52%) to a planetary mixer with a volume of 2 liters, and then add 200g of vinylmethylphenylpolysiloxane (viscosity of 400mPa s, vinyl mass fraction 0.55%, phenyl mass fraction 3.2%), then add 450g of quartz powder with a particle size of 5μm, 150g of alumina with a particle size of 10μm, 80g of iron oxide red and 20g of hexamethyldisilazide The fumed silica obtained after alkane treatment was stirred for 30min under the condition of -0.098MPa in vacuum, then 20g of vinyltriethoxysilane was added, stirred for 60min under the condition of -0.098MPa in vacuum, and the material was stopped and discharged. A first mixture is obtained. 0.2g of methyl vinyl polysiloxane complexed platinum catalyst (Pt mass fraction is 5000ppm), 10g of triallyl cyanurate and 85g of hydrogen-containing polysiloxane (viscosity of 40mPa s, silicon The mass fraction of -H in the hydrogen bond is 0.38%), mixed uniformly u...

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Abstract

The invention provides a single-component addition-type silicone rubber which is prepared by vulcanizing the following raw materials in parts by mass: 20-50 parts of vinyl polysiloxane, 3-18 parts of vinyl methyl phenyl polysiloxane, 4-20 parts of hydrogen-containing polysiloxane, 0.01-0.1 part of platinum catalyst, 0.3-2.5 parts of inhibitor, 40-60 parts of filler, 2.0-10 parts of additive and 0.5-3 parts of tackifier. The single-component addition-type silicone rubber comprises the heat-resistant additive and the filler, so that the single-component addition-type silicone rubber prepared by vulcanizing has good high temperature resistance and low temperature aging resistance. The single-component addition-type silicone rubber comprises the catalytic inhibitor, so that the single-component addition-type silicone rubber has a higher inhibitory effect, and the storage life of the single-component addition-type silicone rubber is prolonged. When the addition-type silicone rubber is vulcanized, small molecular substances are not produced, and packaging components are not corroded.

Description

technical field [0001] The invention relates to the technical field of addition-type silicone rubber, in particular to a one-component addition-type silicone rubber and a preparation method thereof. Background technique [0002] Silicone rubber is a polymer elastomer whose main molecular chain is composed of silicon and oxygen atoms alternately, and there are usually two organic groups attached to the silicon atom. According to the applicable temperature, it can be divided into high temperature silicone rubber (HTV) and room temperature vulcanization (RTV); according to the vulcanization mechanism and use process, it can be divided into polycondensation reaction type and addition reaction type; according to different components, it can be divided into one-component silicone rubber. and two-component silicone rubber. [0003] The one-component silicone rubber material is composed of a single component. Compared with the two-component silicone rubber, it does not need mixing ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L83/07C08L83/05C08K13/02C08K3/36C08K3/22C08J3/24
Inventor 周利庄曾智赵慧宇宋星光姜其斌
Owner ZHUZHOU TIMES ELECTRIC INSULATION
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