[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.
[问题] 提供一种生产多元醇交联交联
氟橡胶产品的方法,该产品具有低粘性和显著提高的橡胶硬度。
[解决问题的方法]该方法包括对
氟橡胶组合物进行加压、加热和
硫化以成型
硫化产品;
氟橡胶组合物包括可多元醇交联的
氟橡胶、包括季
铵盐或季
鏻盐的交联
促进剂和多元醇
交联剂,交联
促进剂与多元醇
交联剂(交联
促进剂/多元醇
交联剂)的重量比 X 为 0.对于仲
鏻盐,X 的重量比为 0.90 至 3.00,对于仲
铵盐,X 的重量比为 0.4 至 0.6;将含有溶解在溶剂中的多元醇
交联剂和交联
促进剂的处理溶液涂抹在
硫化产品的表面;以及在 200 至 300°C 的温度下对所得
硫化产品进行 1 至 20 小时的热处理。