久久久久久久久久97,久久人人精,2018中文字幕在线视频,欧洲亚洲免费视频,日韩电影一二三区,国产欧美欧洲,不卡的av在线

Your Current Position:  PRODUCTS > Modified rosin series > Disproportionated Rosin

Disproportionated Rosin

Uses: Disproportionated rosin is made from gum rosin through catalyzing by the Pd-C catalysts, mainly used in synthetic rubber, adhesives, pigments, dyestuff surfact treatment, coatings, inks, etc.