Molding composition, molded composition and sealing device for sealing carbon dioxide
First Claim
1. A molded sealing composition for sealing against permeation of carbon dioxide gas comprising a first molded sealing portion made of a fluoro rubber composition and a second molded sealing portion made of a fluoro thermoplastic elastomer composition including a fluoro thermoplastic elastomer and a reinforcing filler having a particle size of not more than 100 nm, wherein said first molded sealing portion is covered by said fluoro thermoplastic elastomer composition in such a manner that said first molded sealing portion does not contact directly with carbon dioxide gas.
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Abstract
An object of the present invention is to provide a molding composition having an excellent properties to seal carbon dioxide. The composition is made of fluoro thermoplastic elastomer having a reinforcing filler such as carbon black or white carbon having a particle diameter of not more than 100 nm. The composition can be used as a sealing materials such as O-ring, oil seal, gasket, hose, tube or diaphragm for sealing carbon dioxide.
11 Citations
6 Claims
- 1. A molded sealing composition for sealing against permeation of carbon dioxide gas comprising a first molded sealing portion made of a fluoro rubber composition and a second molded sealing portion made of a fluoro thermoplastic elastomer composition including a fluoro thermoplastic elastomer and a reinforcing filler having a particle size of not more than 100 nm, wherein said first molded sealing portion is covered by said fluoro thermoplastic elastomer composition in such a manner that said first molded sealing portion does not contact directly with carbon dioxide gas.
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5. A sealing device for sealing against permeation of carbon dioxide gas comprising:
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a first molded sealing portion made of a fluoro rubber composition, a second molded sealing portion made of a fluoro thermoplastic elastomer composition including a fluoro thermoplastic elastomer and a reinforcing filler having a particle diameter of not more than 100 nm, and a sealing portion being formed integrally with said second molded sealing portion, said second sealing portion sealingly engaging with a counter portion to be sealed, wherein a portion of a carbon dioxide side of said sealing device is made of said fluoro thermoplastic elastomer composition and at least one surface of said first molded sealing portion. - View Dependent Claims (6)
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Specification