There is a common method of refining alkaline cleaning , clay refinement and hydrofining, and so on.常用的精制方法有碱洗, 白土精制和加氢精制等.The development of new petroleum wax hydrofining catalyst - FV - 10 commercial experiments on var...
用量及硫化条件和4010NA类防老剂相同,一般为二份.Dosage and vulcanization condition is the same as 4010 NA antiager.采用(WSLMB)的复合防老剂防老化效果较好.The combination of the phenolic antioxidants WSL and MB have better effects against the aging.讨论了防老剂的品种...