A zinc oxide dispersion for use in rubber compounds having at least 40, preferably 74-92, weight percent zinc oxide powder and at least five weight percent of a binder selected from the group consisting of asphalt and terpene tackifiers. The dispersion also preferably includes at least 0.5 weight percent stearifying agent such as stearic acid.
A White rubber composition normally subject to discoloration and containing natural rubber normally sub- 2,581,907 1/1952 Smth et 260 45-95 XR ject to oxidative deterioration, and as an antioxidant there- 5 for about 0.2 to 5 parts by Weight of 4,6-dinonyl-o-cresol DONALD CZAJA Exammer' per 100 parts of rubber.