中文字幕乱码AV电影_国内AV免费在线观看_东京热精品无码免费资源视频_国模私拍精品一区二区

Nitrile rubber is made from butadiene and acrylonitrile through emulsion polymerization. It is mainly used to make oil-resistant rubber products. Nitrile rubber is produced by emulsion polymerization of butadiene and acrylonitrile. Nitrile rubber is mainly produced by low-temperature emulsion polymerization. . Its disadvantages are poor low temperature resistance, poor ozone resistance, poor electrical properties and slightly lower elasticity. Nitrile rubber is mainly used to make oil-resistant rubber products.