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Obturator-type silicone rubber foam material, and its preparing method and use

A foam material and silicone rubber technology, which is applied in the field of closed-cell silicone rubber foam material and its preparation, can solve the problems of inconsistent crosslinking degree between the surface layer and the inside of the rubber material, uneven foam density, poor heat transfer, etc., and achieve permanent compression Low deformation, fine and uniform cells, and smooth surface

Inactive Publication Date: 2006-10-25
SICHUAN UNIV
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AI Technical Summary

Problems solved by technology

In addition, the uniformity of peroxide crosslinking is affected by its dispersion state in silicone rubber. Especially for foamed rubber, the heat transfer is poor, and the internal heating is slower than the surface layer, which often results in the surface and internal crosslinking of the rubber. Inconsistent, non-uniform foam density and thick skin

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0027] 1. Mix 100 grams of dimethyl silicone rubber, 15 grams of fumed silica, and 2 grams of hydroxyl silicone oil at room temperature for 4 minutes using a double-roll mill, add 3 grams of azodicarbonamide, and 3 grams of oxidized Zinc, 4 grams of triallyl isocyanurate, continued mixing for 4 minutes, and then compression molded into plates at room temperature on a flat vulcanizer. Cylindrical Co 60 The γ-ray source, in the air at room temperature, performs radiation crosslinking on the silicone rubber compound, and the radiation dose is 6kGy. The cross-linked silicone rubber is foamed in hot air, the temperature of the hot air is 200° C., and the foaming time is 5 minutes. After the silicone rubber is foamed, use it immediately 60 Coγ-ray source for secondary radiation cross-linking, the radiation dose is 50kGy.

[0028] 2. Mix 100 grams of methyl vinyl silicone rubber, 30 grams of fumed silica, and 6 grams of diphenylsilanediol with an internal mixer at room temperature...

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PUM

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Abstract

The invention discloses an isolated cell type silicon rubber foam material and the manufacture method and the application. The feature is that it is made up of 100 portions silicone rubber, 15-80 portions reinforcing agent, 2-15 portions constitution controller, 3-15 portions foaming agent, 0-3 portions blowing promoter, and 0-4 portions coupling assistant agent, after taking radiation by electron beam or gama radiation, the silicon rubber takes coupling reaction, and the radiation dose is 5-20KGy. Decomposing foaming by heating, the silicon rubber could immediately taking electron beam or gama radiation to take the second radiation coupling, the radiation dose is 20-50KGy to improve the complex performance of the silicon rubber foam material. The invention could be used as sealing, damping, insulating, sound insulating and thermal insulating material.

Description

technical field [0001] The invention relates to a closed-cell silicone rubber foam material and its preparation method and application, belonging to the field of polymer material processing. Background technique [0002] Silicone rubber foam material is a porous polymer elastic material prepared by foaming silicone rubber. According to the different cell structures, it can be divided into closed-cell, open-cell and mixed-cell silicone rubber foams. According to the preparation method and the type of silicone rubber used, silicone rubber foam can be divided into room temperature vulcanized silicone rubber foam and high temperature vulcanized silicone rubber foam, Zhang Jikai, "Organic Silicon Materials", China Matter Publishing House, Beijing, 1999. Room temperature vulcanized silicone rubber foam usually uses condensation-type hydroxyl-terminated silicone rubber as the base material, hydroxyl silicone oil as the foaming agent, and platinum complex as the catalyst. It can be ...

Claims

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Application Information

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IPC IPC(8): C08L83/04C08J3/24C08J9/04C08K3/36C08K5/25C08K5/54C08L83/07C09K3/10
Inventor 刘鹏波刘道龙徐闻
Owner SICHUAN UNIV
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