北条麻妃99精品久久朝桐光丨亚洲一区二区三区久久久丨wwwyoujizzcom久久丨中日韩乱码一二新区丨成年美女黄网站色大免费视频丨一区二区网丨亚洲精品久久久久久丨亚洲国产毛片aaaaa无费看丨美女二区丨www.久久久久久丨亚洲337少妇裸体艺术丨日韩一区二区三区精品丨婷婷亚洲视频丨精品免费视频一区二区丨久久久麻豆精品一区二区丨免费午夜福利在线观看不卡丨99久久国产露脸精品国产麻豆丨看污片网站丨а√天堂www在线天堂小说丨欧洲美熟女乱又伦

Hindered amines have good inhibition effect on photooxygen degradation of polymers and organic compounds, and are a kind of excellent light stabilizers.

It is a light stabilizer that can absorb the ultraviolet part of sunlight and fluorescent light sources without changing itself.

The oxidation process of polymers can be delayed or inhibited to prevent the aging of polymers and extend their service life.

It can be used as an efficient inhibitor in the distillation or transport of olefins and fats in olefins.

Tetramethyl guperone, tetramethyl guperol and its derivatives, tert-octylamine and other products.

Improve the antioxidant properties and outdoor UV resistance of plastic products, extend the service life.