A process is provided for improving the resistance to deterioration when exposed to weather and the adherence to other materials of polypropylene, particularly in the form of moldings, which comprises subjecting a surface of polypropylene to the action of activated oxygen gas at a temperature below about 100 °C in the presence of an N-alkyl or N-acyl 2,2,6,6-tetramethyl piperidyl compound for a time sufficient to improve such weather resistance and adherence.
本发明提供了一种工艺,用于提高聚
丙烯在暴露于气候中时的抗变质能力以及与其他材料的附着力,特别是以模塑件的形式,该工艺包括在 N-烷基或 N-酰基
2,2,6,6-四甲基哌啶化合物存在的情况下,将聚
丙烯表面置于活性
氧气体作用下,温度低于约 100 °C,时间足以提高这种耐候性和附着力。