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High-hardness addition type liquid silica gel and preparation method thereof

A liquid silica gel and additive technology, applied in the field of silicone rubber products, can solve the problems of complicated preparation process and inconvenient large-scale production, and achieve the effect of simple processing technology, convenient large-scale production, and increased content

Inactive Publication Date: 2021-09-21
惠州市永卓科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its preparation process is complicated, and it is not convenient for large-scale production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A component: 300 parts of base rubber, 250 parts of vinyl MQ resin, 0.1 part of platinum complex catalyst; B component: 45 parts of the first vinyl MQ resin, 8.5 parts of hydrogen-containing silicone oil in the end, tetramethyl tetra 1.7 parts of vinyl cyclotetrasiloxane.

[0034] Among them, the viscosity of component A is 45000mPa·s, the viscosity of component B is 2500mPa·s, and the mass ratio of component A and component B is 10:1.

[0035] Wherein, the basic rubber material is composed of surface-treated reinforcing filler and vinyl-terminated silicone oil, and the mass ratio of reinforcing filler to vinyl-terminated silicone oil is 40:60.

[0036] Among them, the vinyl-terminated silicone oil has a viscosity of 1000mPa·s and a density of 0.97g / cm 2 , the number average molecular weight is 28000, and the vinyl content is 0.18-0.26%.

[0037] Among them, the reinforcing filler is precipitated silica, and silazane is used to pretreat the surface of precipitated sil...

Embodiment 2

[0050] A component: 280 parts of base rubber, 230 parts of vinyl MQ resin, 0.2 parts of platinum complex catalyst; B component: 40 parts of the first vinyl MQ resin, 6 parts of hydrogen-containing silicone oil in the end, tetramethyl tetra 1.5 parts of vinyl cyclotetrasiloxane.

[0051] Among them, the viscosity of component A is 50000mPa·s, the viscosity of component B is 3500mPa·s, and the mass ratio of component A and component B is 9:1.

[0052] Wherein, the mass ratio of the reinforcing filler to the vinyl-terminated silicone oil is 35:55.

[0053] Among them, the vinyl-terminated silicone oil has a viscosity of 800 mPa·s and a number average molecular weight of 26,000.

[0054] Wherein, the mass ratio of silazane and precipitated silica is 10:90.

[0055] Wherein, the mass ratio of the first vinyl MQ resin to the second vinyl MQ resin is 1:3.

[0056] Wherein, the viscosity of the first vinyl MQ resin is 10000 mPa·s.

[0057] Wherein, the viscosity of the second viny...

Embodiment 3

[0061]A component: 320 parts of base rubber, 270 parts of vinyl MQ resin, 0.3 parts of platinum complex catalyst; B component: 50 parts of the first vinyl MQ resin, 10 parts of hydrogen-containing silicone oil in the end, tetramethyl tetra 2.0 parts of vinyl cyclotetrasiloxane.

[0062] Among them, the viscosity of component A is 55000mPa·s, the viscosity of component B is 4500mPa·s, and the mass ratio of component A and component B is 11:1.

[0063] Wherein, the mass ratio of the reinforcing filler to the vinyl-terminated silicone oil is 45:65.

[0064] Among them, the vinyl-terminated silicone oil has a viscosity of 1200 mPa·s and a number average molecular weight of 30000.

[0065] Wherein, the mass ratio of silazane and precipitated silica is 30:110.

[0066] Wherein, the mass ratio of the first vinyl MQ resin to the second vinyl MQ resin is 1:5.

[0067] Wherein, the viscosity of the first vinyl MQ resin is 14000 mPa·s.

[0068] Wherein, the viscosity of the second vi...

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Abstract

The invention relates to a silicone rubber product, in particular to high-hardness addition type liquid silicone rubber and a preparation method thereof. The high-hardness addition type liquid silicone rubber comprises a component A and a component B. The component A comprises a basic rubber material, vinyl MQ resin and a platinum complex catalyst; and the component B comprises first vinyl MQ resin, silicone oil containing hydrogen in the end and tetramethyl tetravinyl cyclotetrasiloxane. According to the preparation method, the affinity of a reinforcing filler to oil is improved by performing surface pretreatment on the reinforcing filler, the content of the reinforcing filler in the silica gel can be further increased, and meanwhile, two different vinyl MQ resins are compounded to serve as a reinforcing agent of a silica gel system, so that the hardness of the prepared silica gel is greatly improved.

Description

technical field [0001] The invention relates to silicone rubber products, in particular to a high-hardness addition type liquid silica gel and a preparation method thereof. Background technique [0002] High-hardness addition type liquid silicone rubber is generally a two-component addition type room temperature vulcanization silicone rubber. Vulcanization molding, high hardness liquid silicone rubber is mainly used in important sectors such as automobiles, aerospace, petrochemical and machinery, as well as national defense, transportation, electronic appliances and other fields. [0003] Among the existing disclosed high-hardness silicone rubbers, coagulation silicone rubber is the main one, which is mainly made of silicone rubber raw rubber added to a double-roll rubber mixing machine or a closed kneader, and then added with white carbon black, silicone oil, etc. Auxiliary, under the action of a vulcanizing agent, a certain temperature and pressure are applied to the synt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/07C08L83/05C08K9/06C08K7/26
CPCC08L83/04C08L2205/025C08L2205/035C08K9/06C08K7/26
Inventor 王细平
Owner 惠州市永卓科技有限公司
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