Seal material
AssigneesZeon Corporation, Air Water Mach Inc.
InventorsYoshihisa Takeyama, Masahiro Ueno, Yasuhiro Isoda, Takeshi Terashima
Life of this patent
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Abstract
Provided is a seal material having excellent non-adherence to metal surfaces. The seal material is formed of a cross-linked rubber that is obtained through cross-linking of a cross-linkable rubber composition containing a binary fluororubber, a carbon material, and a polyol cross-linker. The carbon material includes one or more carbon nanotubes. The cross-linked rubber has an adhesion strength of 2 N or less to a metal surface after being heated at 250° C. for 70 hours while in contact with the metal surface.
Claims14
A seal material comprising a cross-linked rubber, wherein
- the cross-linked rubber is obtained through cross-linking of a cross-linkable rubber composition containing a binary fluororubber, a carbon material, and a polyol cross-linker,
- the carbon material includes one or more carbon nanotubes, and
- the cross-linked rubber has an adhesion strength of 2 N or less to a metal surface after being heated at 250° C. for 70 hours while in contact with the metal surface, wherein
- content of the one or more carbon nanotubes in the cross-linkable rubber composition is not less than 0.1 parts by mass and not more than 4 parts by mass per 100 parts by mass of the binary fluororubber,
- the polyol cross-linker is a polyhydroxy aromatic compound, and
- content of the polyhydroxy aromatic compound in the cross-linkable rubber composition is 0.1 parts by mass or more and 10 parts by mass or less per 100 parts by mass of the binary fluororubber.
Dependencies are inferred from the claim text.