Patent ID: 9352975
Filing Date: 2016-05-31
CPC Classification: A61K,B01J,B82Y,C01G,C01P

Claim Text:
1. An ultrafine zinc oxide particle dispersion comprising: a hydrophobic solvent; and a plurality of ultrafine zinc oxide particles having an average particle diameter D wherein individual particles of the plurality of ultrafine zinc oxide particles are surrounded by both a primary surfactant that extends from a surface of the individual particles by a first distance and a secondary surfactant that extends from the surface of the individual particles by a second distance, the first distance being greater than the second distance, wherein the hydrophobic solvent is selected from the group consisting of nonpolar hydrocarbons, ethers and petroleum hydrocarbons, and the primary surfactant is a polyoxyethylene nonylphenyl ether represented by: wherein n is an integer in a range of 1 to 20.