A process involves adding a peroxide masterbatch to a molten blend of a fluorocarbon elastomer and a thermoplastic material. The peroxide masterbatch contains greater than or equal to 5% weight percent organic peroxide, further contains a fluorocarbon elastomer, and typically also contains a crosslinker containing at least two sites of olefinic unsaturation. The fluorocarbon elastomer in the molten blend and in the peroxide masterbatch may be the same or different. After the peroxide masterbatch is added to the molten blend, the combination is mixed at a temperature and for a time sufficient to effect cure of the fluorocarbon elastomers. By using a masterbatch, a faster and more uniform dispersion of peroxide curative is possible due to pre-dispersion of peroxide in the elastomer phase, which leads to shaped articles having improved mechanical properties.
一种工艺是将过氧化物母料添加到
氟碳弹性体和热塑性材料的熔融混合物中。过氧化物母料含有大于或等于 5% 重量百分比的有机过氧化物,还含有碳
氟化合物弹性体,通常还含有至少两个烯烃不饱和位点的
交联剂。熔融混合物和过氧化物母料中的碳
氟化合物弹性体可以相同,也可以不同。过氧化物母料加入熔融混合物后,在足以使碳
氟化合物弹性体固化的温度和时间下混合。通过使用母料,可使过氧化物固化剂更快、更均匀地分散在弹性体相中,从而使成型产品具有更好的机械性能。