| 摘要 |
[Problem] To provide a method for producing a polyol-crosslinking, crosslinked fluororubber product which exhibits low tack properties and significantly increased rubber hardness. [Means for Solving the Problem] The method comprises pressurizing, heating, and vulcanizing a fluororubber composition to mold a vulcanized product; the fluororubber composition comprising a polyol-crosslinkable fluororubber, a crosslinking accelerator including a quarternary phosphonium salt or a quarternary ammonium salt, and a polyol crosslinking agent, the weight ratio X of the crosslinking accelerator to the polyol crosslinking agent (crosslinking accelerator/polyol crosslinking agent) being from 0.90 to 3.00 for a quarternary phosphonium salt, and being from 0.4 to 0.6 for a quarternary ammonium salt; applying a treatment solution containing the polyol crosslinking agent and the crosslinking accelerator dissolved in a solvent to a surface of the vulcanized product; and heat-treating the resulting vulcanized product at a temperature ranging from 200 to 300°C for 1 to 20 hours.
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