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Preparation method of foamed silicone rubber

A technology of silicone rubber and foam, which is applied in the field of preparation of foam silicone rubber, to achieve good effect, keep the cell structure intact, and have a hard texture

Inactive Publication Date: 2019-04-09
常馨尹
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, ordinary foam rubber is extremely flammable, and even under the condition of insufficient oxygen supply, the fire can use the air in the cells to spread rapidly.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] The preparation method of the foamed silicone rubber of the present invention comprises the steps of: weighing 100g of the mixed rubber prepared by methyl vinyl silicone rubber, kneading at room temperature in a double-roller mixer, and after the silicone rubber is covered with rolls, Add 10g of glass fiber powder, platinum catalyst, 0.2g of hydrogen-containing silicone oil, and 0.5g of hydroxysilicone oil; mix evenly and release the sheet; lay it flat and put it into an aging tester for vulcanization and foaming at the same time, set the temperature at 240°C, and the time is 5min, the preparation is complete.

[0015] In the preparation method of the foamed silicone rubber of the present invention, the mass fraction of the platinum catalyst is 0.57×10 -6 (Based on Pt mass).

[0016] In the preparation method of the foamed silicone rubber of the present invention, the thickness of the outgoing sheet is 2mm.

[0017] The preparation method of foam silicone rubber of t...

Embodiment 2

[0022] The preparation method of the foamed silicone rubber of the present invention comprises the steps of: weighing 100g of the mixed rubber prepared by methyl vinyl silicone rubber, kneading at room temperature in a double-roller mixer, and after the silicone rubber is covered with rolls, Add 45g of glass fiber powder, platinum catalyst, 0.5g of hydrogen-containing silicone oil, and 0.7g of hydroxysilicone oil; mix evenly and release the sheet; lay it flat and put it in an aging tester for vulcanization and foaming at the same time, set the temperature at 240°C, and the time is 5 min, the preparation is complete.

[0023] In the preparation method of the foamed silicone rubber of the present invention, the mass fraction of the platinum catalyst is 3.0×10 -6 (Based on Pt mass).

[0024] In the preparation method of the foamed silicone rubber of the present invention, the thickness of the outgoing sheet is 4mm.

[0025] In the preparation method of the foamed silicone rubbe...

Embodiment 3

[0030] The preparation method of the foamed silicone rubber of the present invention comprises the steps of: weighing 100g of the mixed rubber prepared by methyl vinyl silicone rubber, kneading at room temperature in a double-roller mixer, and after the silicone rubber is covered with rolls, Add 60g of glass fiber powder, platinum catalyst, 1.0g of hydrogen-containing silicone oil, and 0.8g of hydroxysilicone oil; mix evenly and release the sheet; lay it flat and put it into an aging tester for vulcanization and foaming at the same time. The temperature is set at 240°C and the time is 5min, the preparation is complete.

[0031] In the preparation method of the foamed silicone rubber of the present invention, the mass fraction of the platinum catalyst is 3.42×10 -6 (Based on Pt mass).

[0032] In the preparation method of the foamed silicone rubber of the present invention, the thickness of the sheet is 5 mm.

[0033] The preparation method of foam silicone rubber of the pres...

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Abstract

The invention relates to a preparation method of foamed silicone rubber, and belongs to the field of material preparation. The preparation method is characterized by comprising the following steps of:weighing 100g of rubber compound prepared from methyl vinyl silicone rubber, carrying out mill mixing in a two-roll mixing mill at a room temperature, wrapping rolls with silicone rubber, then adding10-60g of glass fiber powder, a platinum catalyst, 0.2-1.0g of hydrogen-containing silicone oil, and 0-0.8g of hydroxy silicone oil; mixing evenly, and discharging a sheet; and flatly paving, puttingin an aging testing machine for vulcanization, simultaneously foaming, setting the temperature to be 240 DEG C and time to be 5 minutes, and completing the preparation of the foamed silicone rubber.The fire-retardant foamed silicone rubber which can be ceramized at a high temperature is prepared by vulcanization carried out through hydrosilylation reaction and foaming carried out through siliconhydrogen dehydrogenation reaction. After the foamed silicone rubber is fired at the temperature of 1000 DEG C for 30rain, the foamed silicone rubber has good ceramicization effect and hard texture without surface cracks, the cellular structure is kept perfectly, the volume retention rate is above 85%, and the fireproof performance is excellent.

Description

technical field [0001] The invention belongs to the field of material preparation, in particular to a preparation method of foamed silicone rubber. Background technique [0002] Foam rubber is made of natural or synthetic rubber foam. It has excellent properties such as small mass, softness, elasticity, and low heat transfer. It is widely used in industries such as automobiles, aircraft, building materials, home appliances, chemicals, and daily necessities. However, ordinary foam rubber is extremely flammable, and even under the condition of insufficient oxygen supply, the fire can use the air in the cells to spread rapidly. Some of the large fires that have occurred in recent years are related to the flammable and combustion-supporting properties of such materials. Therefore, flame-retardant foam rubber has great socio-economic value and broad market prospects. At present, foreign research in the field of silicone rubber foam materials is quite active, and mainly focuses ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/07C08L83/05C08L83/04C08K7/14C08J9/02
CPCC08J9/02C08J9/0061C08J9/0066C08J9/0085C08J2383/07C08J2483/04C08J2483/05
Inventor 常馨尹
Owner 常馨尹
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