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Antioxidant and high-temperature-resistant liquid silicone rubber and preparation method thereof

A technology of liquid silicone rubber and high temperature resistance is applied in the field of liquid silicone rubber to achieve the effects of simple and easy preparation method, good mechanical properties and low cost

Inactive Publication Date: 2017-05-31
镇江高美新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ordinary silicone rubber is only suitable for the working environment of -40 ~ 250 ℃, but in practical applications, such as energy and power, transportation, aerospace, industrial electromechanical, metallurgy and other industries, often need to work under conditions as high as 350 ℃ For long-term use, it is necessary to develop silicone rubber materials with higher heat resistance and higher oxidation resistance

Method used

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  • Antioxidant and high-temperature-resistant liquid silicone rubber and preparation method thereof
  • Antioxidant and high-temperature-resistant liquid silicone rubber and preparation method thereof
  • Antioxidant and high-temperature-resistant liquid silicone rubber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A preparation method of anti-oxidation and high temperature resistant liquid silicone rubber, the steps are as follows:

[0036] (1) Prepare base glue:

[0037] ① In parts by weight, 15 parts of vinylpolysiloxane, 28 parts of glycerol, 3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionic acid n- Add 5 parts of stearyl ester into the kneader, and knead for 3.5 hours at a temperature of 35°C;

[0038] ② After raising the kneader to 75°C within 40 minutes, add 38 parts of vinyl polysiloxane with a viscosity of 7500 cp measured at 25°C in parts by weight and continue kneading for 2.5 hours;

[0039] ③ Continue to add 22 parts of vinyl polysiloxane, 5 parts of dicyclohexane, and 15 parts of tetramethyltetravinylcyclotetrasiloxane with a viscosity of 20,000 cp measured at 25°C in parts by weight, and increase the kneading while kneading The temperature inside the machine is to increase the temperature at a rate of 5°C / 15min until the temperature rises to 175°C, and then continue...

Embodiment 2

[0050] A preparation method of anti-oxidation and high temperature resistant liquid silicone rubber, the steps are as follows:

[0051] (1) Prepare base glue:

[0052] ① In parts by weight, 18 parts of vinyl polysiloxane, 23 parts of glycerol, 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid n- Add 3 parts of stearyl ester into the kneader, and knead for 3.5 hours at a temperature of 35°C;

[0053] ② After raising the kneader to 75°C within 45 minutes, add 32 parts of vinyl polysiloxane with a viscosity of 7200cp measured at 25°C in parts by weight and continue kneading for 2.5 hours;

[0054]③ Continue to add 27 parts of vinylpolysiloxane, 7 parts of dicyclohexane, and 16 parts of tetramethyltetravinylcyclotetrasiloxane with a viscosity of 18000cp measured at 25°C in parts by weight, and knead while kneading The temperature inside the machine is to increase the temperature at a rate of 5°C / 15min until the temperature rises to 175°C, and then continue kneading for 2.5 hou...

Embodiment 3

[0065] A preparation method of anti-oxidation and high temperature resistant liquid silicone rubber, the steps are as follows:

[0066] (1) Prepare base glue:

[0067] ① In parts by weight, 10 parts of vinyl polysiloxane, 20 parts of glycerol, 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid n- Add 1 part of stearyl ester into the kneader, and knead for 3 hours at a temperature of 30°C;

[0068] ②After raising the temperature in the kneader to 70°C within 30 minutes, add 30 parts of vinyl polysiloxane with a viscosity of 8000 cp measured at 25°C in parts by weight and continue kneading for 2 hours;

[0069] ③ Continue to add 18 parts of vinyl polysiloxane, 2 parts of dicyclohexane, and 12 parts of tetramethyltetravinylcyclotetrasiloxane with a viscosity of 25,000 cp measured at 25°C in parts by weight, and knead while kneading The temperature inside the machine is to increase the temperature at a rate of 5°C / 15min until the temperature rises to 170°C, and then continue kn...

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PUM

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Abstract

The invention relates to an antioxidant and high-temperature-resistant liquid silicone rubber which is prepared by mixing a component A with a component B at a weight ratio of 3: 40-18: 7; the component A comprises the following components in parts by weight: 90-110 parts of base rubber, 3-10 parts of a platinum complex, 5-8 parts of white carbon black and 12-21 parts of an accelerator; the components B comprises the following components in parts by weight: 50-60 parts of base rubber, 25-30 parts of polysiloxane resin, 8-22 parts of silica, 0.2-0.5 part of an inhibitor, 0.8 to 3.2 parts of a crosslinking agent and 1.4-5.7 parts of a silane coupling agent. The antioxidant and high-temperature-resistant liquid silicone rubber is relatively high in heat resistance and relatively good in oxidation resistance. The invention provides a preparation method of the liquid silicone rubber.

Description

technical field [0001] The invention relates to a liquid silicone rubber, in particular to an oxidation-resistant and high-temperature-resistant liquid silicone rubber and a preparation method thereof. Background technique [0002] Silicone rubber refers to the rubber whose main chain is composed of silicon and oxygen atoms alternately, and there are usually two organic groups attached to the silicon atoms. Because silicone rubber has excellent aging resistance, electrical insulation and good mechanical strength, it is widely used in various industries. Ordinary silicone rubber is only suitable for the working environment of -40 ~ 250 ° C, but in practical applications, such as energy and power, transportation, aerospace, industrial electromechanical, metallurgy and other industries, often need to work under conditions as high as 350 ° C For long-term use, it is necessary to develop silicone rubber materials with higher heat resistance and higher oxidation resistance. Con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/07C08L83/16C08K13/02C08K3/36C08K5/053C08K5/134C08K5/549
CPCC08L83/04C08K2201/014C08L2201/08C08L2205/02C08L2205/025C08L2205/035C08L83/16C08K13/02C08K3/36C08K5/053C08K5/1345C08K5/549
Inventor 陆磊欧金海王超
Owner 镇江高美新材料有限公司
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