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Sealing material and method for producing same

A technology for sealing materials and manufacturing methods, which is applied in the directions of sealing devices, chemical instruments and methods, and thin material processing, and can solve problems such as lack of sealing, dimensional stability, and low flexibility, and achieve excellent cost performance and excellent performance Effect

Inactive Publication Date: 2014-08-06
BRIDGESTONE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The rubber foam using a foaming agent in this way may have low dimensional stability and flexibility due to its main closed cell structure, and may not have sufficient airtightness.

Method used

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  • Sealing material and method for producing same
  • Sealing material and method for producing same
  • Sealing material and method for producing same

Examples

Experimental program
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Effect test

Embodiment 1～8

[0069] In the formulation composition shown in Table 1, the compounds other than the blowing agent, the cell diameter control agent, the vulcanizing agent, and the vulcanization accelerator were kneaded at 130° C. for 10 minutes by a kneader. Next, according to the formula composition shown in Table 1, a foaming agent, a cell diameter control agent, a vulcanizing agent, and a vulcanization accelerator were further added to the kneaded product whose surface temperature was cooled to 25°C, and kneaded at 90°C by a kneader. 7 minutes. Furthermore, the obtained kneaded product was shaped into a sheet by a rubber extruder, put into a heating furnace, and vulcanized and foamed at 170° C. for 60 minutes to obtain a rubber foam with an independent cell structure (thickness 50 mm, average The bubble diameter is 800 μm, and the number of bubbles is 30 / 25mm).

[0070] Next, the rubber foam having a closed cell structure is continuously supplied between a pair of rotating rolls (diameter...

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Abstract

The present invention provides a sealing material which suppresses the generation of cracks, breakage and deformation caused by foam breaking treatment and has excellent sealing properties. A sealing material, characterized in that, the sealing material is formed by vulcanizing and foaming a mixture containing rubber components, a vulcanizing agent and a foaming agent, and the mixture contains ethylene and a carbon number of 3 At least one copolymer rubber of α-olefin and non-conjugated diene, wherein the aforementioned mixture further contains fatty acid calcium salt and fatty acid zinc salt.

Description

technical field [0001] The present invention relates to a sealing material for sealing between parts, and particularly relates to a sealing material using an ethylene-α-olefin-diene copolymer rubber foam. Background technique [0002] Conventionally, in structures such as buildings, vehicles, and electronic equipment, sealing materials are filled in the gaps between components to perform water sealing, heat insulation, and sound absorption. As such a sealing material, a synthetic resin or a rubber foam is used. Since the foam has appropriate resilience (compressive stress), it can follow the unevenness of the surface of the material to be sealed and adhere to it with only a small amount of compression deformation, and can achieve excellent sealing performance. [0003] Among them, the rubber foam obtained by foaming ethylene-α-olefin-diene copolymer rubber with a foaming agent such as azodicarboxamide has excellent weather resistance, heat resistance, and airtightness, so i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K3/10C08J9/10C08K3/30C08K5/098C08L23/16
CPCC08J9/38C08K5/098C08J2323/16C09K2200/0642C08L23/16C08K3/30Y10T428/249953C08J9/103C08J2203/04C09K3/10C09K2200/0447C08J9/0023B29C44/5627
Inventor 山元智弘
Owner BRIDGESTONE CORP