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Silicone rubber sealing element and preparation method thereof

A seal and silica gel technology, which is applied in the field of silica gel seals and its preparation, can solve problems such as poor sealing effect, easy to absorb dust, and affect computer operation, etc., to reduce the possibility, improve antistatic performance, and improve antistatic performance Effect

Pending Publication Date: 2021-10-19
深圳市富发世纪科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current computer cases mostly use silica gel seals. The silica gel material is a combination of highly active adsorption molecules. The material itself has adsorption strength. Under the action of static electricity, the silica gel seals are easy to absorb dust. After the computer case is used for a long time, its sealing effect Deterioration, affecting the operation of the computer

Method used

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  • Silicone rubber sealing element and preparation method thereof
  • Silicone rubber sealing element and preparation method thereof
  • Silicone rubber sealing element and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A preparation method of a silicone sealant, comprising the following preparation steps:

[0033] S1. Cut 500g of 70-degree silica gel into sheets with a thickness less than 50mm, then cut 500g of 70-degree silica gel, 500g of 50-degree silica gel, 15g of talcum powder, 2g of silicon carbide powder, 4g of terminal hydrogen-containing silicone oil and 0.55g Platinum (0)-1,3-diethylene-1,1,3,3-tetramethyldisiloxane was kneaded and rolled at 170°C for 10 minutes, then 18 g of vulcanizing agent was added, and then turned over for 5 minutes to make the vulcanizing agent Mix evenly, then add 8g of color masterbatch, turn over the material for 5 minutes, and roll it to obtain the rubber material;

[0034] S2. Put the rubber material into the corresponding seal mold and press for 55 seconds to form a silicone seal. When pressing, set the temperature of the upper mold to 200°C, the temperature of the lower mold to 195°C, and the low pressure to 200kgf / cm 3 , High pressure is 210...

Embodiment 2-9

[0037] Embodiments 2-9 are all based on Embodiment 1, and differ from Embodiment 1 only in that the amounts of each raw material are different, see Table 2 for details.

[0038] Table 2. Each raw material consumption of embodiment 1-9

[0039]

[0040]

Embodiment 10

[0042] Example 10 is based on Example 1, and differs from Example 1 only in that the number average molecular weight of the terminal hydrogen-containing silicone oil used is 8000.

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Abstract

The invention relates to the field of silicone rubber sealing elements, and particularly discloses a silicone rubber sealing element and a preparation method thereof. The silicone rubber sealing element is prepared from the following raw materials in parts by weight: 40 to 60 parts of 70-DEG silicone rubber, 40 to 55 parts of 50-DEG silicone rubber, 0.5 to 1.2 parts of color master batch, 1.5 to 2 parts of a vulcanizing agent, 1 to 2 parts of talcum powder, 0.05 to 0.5 part of silicon carbide powder, 0.3 to 0.5 part of terminated hydrogen-containing silicone oil and 0.05 to 0.06 part of platinum(0)-1,3-diethylene-1,1,3,3-tetramethyldisiloxane. The preparation method comprises the steps of mixing and rolling, rolling, forming and the like. The silicone rubber sealing element has excellent antistatic performance, and the possibility of dust adsorption is low.

Description

technical field [0001] The invention relates to the field of silicone seals, more specifically, it relates to a silicone seal and a preparation method thereof. Background technique [0002] The seal is a material or part that prevents solid particles from leaking from adjacent joint surfaces and prevents external impurities such as dust and moisture from intruding into the internal parts of the machine. Because silicone products are generally made of liquid silicone, which has good elasticity and water and moisture resistance, people often use silicone to make seals. [0003] Due to the unique properties of silicone materials, silicone seals made of silicone materials generally have good elasticity and waterproof and moisture-proof performance, and have excellent resistance to acid, alkali and other chemical substances. Silicone seals generally do not contain harmful substances, are not easily deformed, and have high product precision. The current computer cases mostly use...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/04C08L83/05C08K3/34
CPCC08L83/04C08L2201/04C08L2205/025C08L2205/035C08K2201/005C08K3/34
Inventor 周辉朗张东东
Owner 深圳市富发世纪科技有限公司
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