UV absorbing compositions
AssigneesM&J Consultants Pty Ltd, David Graham Ellis
InventorsDavid Graham Ellis, Michael Ary Bos
Life of this patent
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Abstract
A process for producing a liquid dispersion of an inorganic oxide selected from zinc oxide, titanium dioxide and iron oxide, and having a particle size in the range of 0.02 to 30 .mu.m, the process including comminuting the oxide in the presence of the liquid, the liquid being constituted by or including a component having available hydrogen and/or oxygen ions. The liquid is selected from one of an alcohol, ester, hydrogenated ester or polymer containing hydroxyl or hydrogen group(s). The stable dispersion which does not aggregate or agglomerate is suitable for use in topical preparations such as skin care or therapeutic products, cosmetics or hair care products.
Claims17
A process for producing a dispersion of particles of an inorganic oxide selected from zinc oxide, titanium dioxide or iron oxide in liquid, the process including comminutng the oxide in the presence of the liquid to produce smaller particles with fresh cleavage surfaces to provide a particle size in the range of from 0.025 to 0.5 .mu.m, wherein the liquid is selected from the group consisting of alcohols, esters, hydrogenated esters and polymers containing available hydroxyl group(s) and wherein the liquid is free of dispersing agent.
Dependencies are inferred from the claim text.