| abstract |
An organic phosphorus-containing antioxidant which is stablized against hydrolysis includes (a) 20 to 99.9 wt % of organic phosphite or phosphonite; and (b) 0.1 to 80 wt % of acid-binding metal salt treated with a surface conditioning agent, wherein the weight ratio of the surface conditioning agent to the acid-binding metal salt is 0.1 to 50 wt %:99.9 to 50 wt %, and the surface conditioning agent is selected from the group consisting of silanes, titanates, zirconates, aluminates, zirco-alumiates, non-ionic surfactants, and anionic surfactants. |