| 摘要 |
PROBLEM TO BE SOLVED: To provide a fluoro-rubber sealing material which has excellent sealing properties under high/low temperature load and can seal at a temperature of -40°C or lower even when a light oil (a diesel fuel) is used. SOLUTION: The fluoro-rubber sealing material is produced by cross-linking a composition for the fluoro-rubber sealing material which comprises: 100 pts.wt of a fluorinated copolymer containing 64 to 69 wt.% of fluorine, having a cross-linking part derived from a brominated compound and/or an iodinated compound, and capable of being cross-linked with a peroxide; 0.5 to 6 pts.wt of an organic peroxide; and 1 to 10 pts.wt of a polyfunctional monomer, wherein, the fluorinated copolymer in the composition for the fluoro-rubber sealing material is a fluoro-rubber polymer which is produced by copolymerizing the following (a) to (e): (a) 30-70 mol% of vinylidene fluoride (VDF); (b) 10-30 mol% of tetrafluoroethylene (TFE); (c) 10-20 mol% of perfluoro(methyl vinyl ether) (FMVE); (d) 5-30 mol% of perfluoro (methoxymethyl vinyl ether) (FMMVE); and (e) a brominated and/or iodinated unsaturated fluoro hydrocarbon, which has a small amount with respect to 100 mol% of the total of the components (a) to (d) (=(a)+(b)+(c)+(d)). COPYRIGHT: (C)2010,JPO&INPIT |
