国产国产成人精品久久,青青久操视频,亚洲婷婷综合色高清在线,女女综合网,成人免费草草视频,亚洲色图第三页,亚洲视频在线观看网址

Disproportionated Rosin

PRODUCTS > Disproportionated Rosin > 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.