Granted Patent B2

US 9,168,211 · App. 14/228,745 · Granted Oct 27, 2015

Abstract

Claims (10)

1. A method of making an anhydrous, pigmented sunscreen composition, comprising in sequence:

adding a hydrophobic silica to a lipid phase comprising a dispersed color pigment and an organic UV-filter;

homogenizing the lipid phase comprising the hydrophobic silica by rotary mixing at a rotation speed of at least 1000 rpm;

adding a hydrophilic silica to the lipid phase comprising hydrophobic silica; and

re-homogenizing the lipid phase comprising the hydrophobic silica and the hydrophilic silica by rotary mixing at a rotation speed of at least 1000 rpm.

2. The method of claim 1 , wherein said homogenizing step is performed for at least one minute.

3. The method of claim 1 further comprising adding a silicone elastomer after said re-homogenizing step.

4. The method of claim 3 , wherein the amount of silicone elastomer added is 8% by weight of the composition.

5. The method of claim 1 , wherein said anhydrous, pigmented sunscreen composition comprises about 40% to about 75% by weight of oil.

6. The method of claim 3 , wherein the anhydrous, pigmented sunscreen composition comprises about 1% by weight of waxes.

Assignments (9)