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Addition type liquid silicone rubber as well as preparation method and application thereof

A liquid silicone rubber, addition molding technology, applied in the field of silicone rubber, can solve the problems of easy generation of bubbles, high viscosity, easy oil production, etc.

Pending Publication Date: 2021-10-29
佛山市天宝利硅工程科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, the application provides an addition-type liquid silicone rubber and its preparation method and application, which can effectively solve the technical problems of easy generation of bubbles and oil leakage caused by the high viscosity of existing silicone rubber materials

Method used

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  • Addition type liquid silicone rubber as well as preparation method and application thereof
  • Addition type liquid silicone rubber as well as preparation method and application thereof
  • Addition type liquid silicone rubber as well as preparation method and application thereof

Examples

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preparation example Construction

[0049] The preparation method of the terminal hydrogen-containing silicone oil with a hydrogen content of 0.3%: 15g of tetramethyldisiloxane, 80g of octamethylcyclotetrasiloxane, 5g of tetramethylcyclosiloxane, 15g of cation exchange The resins were mixed and reacted for 6 hours under the condition of 80° C. to obtain the terminal hydrogen-containing silicone oil.

[0050] The preparation method of the terminal hydrogen-containing silicone oil with a hydrogen content of 0.25%: 6g of tetramethyldisiloxane, 84g of octamethylcyclotetrasiloxane, 10.5g of methyl-terminated side chain hydrogen-containing silicone oil (containing Hydrogen content 1.6%), 15g of cation exchange resins were mixed, reacted under the condition of 80 ℃ for 6 hours, and obtained terminal hydrogen-containing silicone oil.

[0051] The preparation method of the terminal hydrogen-containing silicone oil with a hydrogen content of 0.15%: 8g of tetramethyldisiloxane, 85g of octamethylcyclotetrasiloxane, 2g of te...

Embodiment 1

[0057] The embodiment of the present application provides a kind of addition type liquid silicone rubber, the method comprises:

[0058] 1. Add 100 parts by mass of vinyl polydimethylsiloxane with a viscosity of 5000mpa.s into the kneader, stir evenly, and then add 70 parts by mass of 2 / g precipitated white carbon black, 6 parts by mass of hexamethyldisilazane, and 1.5 parts by mass of water were stirred in a kneader for 3 hours, then heated to 180°C for 4 hours in vacuum heat treatment, discharged, and passed through three rolls Grinder to get the base glue.

[0059] 2. Add 100 parts by mass of the above rubber base, add 40 parts by mass of methyl-terminated vinyl silicone oil with a viscosity of 100mpa.s, add 10 parts by mass of vinyl-terminated polydimethylsiloxane with a viscosity of 2000mpa.s, and add platinum 0.5 parts by mass of the catalyst (2000PPM of the vinyl complex) was uniformly stirred in a planetary mixer to prepare Agent A.

[0060] 3. Add 100 parts by mass...

Embodiment 2

[0064] The embodiment of the present application provides a kind of addition type liquid silicone rubber, the method comprises:

[0065] 1. Add 100 parts by mass of vinyl polydimethylsiloxane with a viscosity of 5000mpa.s into the kneader, stir evenly, and then add 70 parts by mass of polydimethylsiloxane with a specific surface area of ​​180m 2 / g precipitated white carbon black, 6 parts by mass of hexamethyldisilazane, 4 parts by mass of dimethyldiethoxysilane, and 2 parts by mass of water were stirred in a kneader for 3 hours, then heated to 180°C Vacuum heat treatment for 4 hours, discharge, and pass through a three-roll mill to obtain base rubber.

[0066] 2. Add 100 parts by mass of the above rubber base, add 40 parts by mass of methyl-terminated vinyl silicone oil with a viscosity of 100mpa.s, add 10 parts by mass of vinyl-terminated polydimethylsiloxane with a viscosity of 200mpa.s, and add platinum 0.5 parts by mass of the catalyst (2000PPM of the vinyl complex) was ...

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Abstract

The invention belongs to the technical field of silicone rubber, and particularly relates to addition type liquid silicone rubber and a preparation method and application thereof. The invention provides the addition type liquid silicone rubber on the first aspect. The addition type liquid silicone rubber comprises a first mixture and a second mixture. A preparation method of the first mixture comprises the following steps: step 1, mixing raw materials, and carrying out heat treatment to obtain base rubber, wherein the raw materials comprise vinyl-terminated silicone oil, white carbon black, a treating agent and water; and step 2, mixing the base rubber, methyl-terminated ethylene silicone oil, vinyl-terminated silicone oil and a platinum catalyst to prepare a first mixture. A preparation method of the second mixture comprises the step of mixing the base rubber, methyl-terminated ethylene silicone oil, hydrogen-containing silicone oil, vinyl-terminated silicone oil and an inhibitor to prepare the second mixture. The invention provides the addition type liquid silicone rubber and the preparation method thereof, and can effectively solve the technical problems that bubbles are easily generated and oil is easily generated due to high viscosity of an existing silicone rubber material.

Description

technical field [0001] The application belongs to the technical field of silicone rubber, and in particular relates to an addition-type liquid silicone rubber and its preparation method and application. Background technique [0002] With the improvement of people's living standards, the requirements for the quality of life are also getting higher and higher. In consideration of safety and environmental protection, traditional adult products and humanoid products are made of PVC materials, and in recent years, they have been gradually replaced by silicone rubber materials. This is because the silicone rubber material has good biocompatibility with the human body and will not produce allergic reactions after contact with the human body. [0003] At present, there are two molding methods for silicone rubber material products, one is casting molding, and the other is liquid injection molding. More common is casting molding, and casting molding products have higher requirements...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/07C08L83/05C08K7/26
CPCC08L83/04C08L2205/025C08L2205/035C08K7/26
Inventor 张启发宁颖辛志勇
Owner 佛山市天宝利硅工程科技有限公司
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