High SPF (30 and over) waterproof sunblock compositions

• US 5,770,183 A
• Filed: 08/01/1996
• Issued: 06/23/1998
• Est. Priority Date: 08/01/1996
• Status: Expired due to Term

• Current Assignee: Biocycle Laboratories, Inc.
• Original Assignee: Biocycle Laboratories, Inc.
• Inventors: Linares, Francisco J.
• Primary Examiner(s): Dodson, Shelley A.
• Application Number:
  US08/690,898
• Time in Patent Office: 691 Days
• Field of Search: 424/59, 424/60, 424/400, 424/401, 514/844, 514/846, 514/847, 514/873, 514/937, 514/938, 252/309
• US Class Current: 424/59
• CPC Class Codes: B01J 13/00 Colloid chemistry, e.g. the production of colloidal materials or their solutions, not otherwise provided for; Making microcapsules or microballoons
• CPC Class Codes: Y10S 516/923 Emulsion

Abstract

A waterproof water-in-oil emulsion, wherein the aqueous phase consists predominately of deionized water and the oil phase includes sunscreen active ingredients, silicone emulsifiers, oil soluble solubilizers and skin conditioning agents. The emulsion provides sun protection higher than SPF 30 and is characterized in that the mean particle size of the oil phase ingredients is 2.0 Microns (μ). The particles of the emulsion are uniformly distributed and substantially of the same size to reduce gaps between particles thus reducing the amount of skin left exposed to ultra violet radiation. A method of manufacturing the emulsion is also disclosed.

Claims

1. An emulsion having an aqueous phase and an oil phase, said oil phase having ingredients comprising at least three components, said components selected from a group consisting of:

oxybensone, sulisobensone, dioxybensone, menthyl anthranilote, aminobenzoic acid, amyl dimethyl PABA, 2-ethoxyethyl p-methoxy cinnamate, diethamolamine p-methoxy cinnamate, digalloyl trioleate, ethyl 4-bis (hydroxypropyl) aminobenzoate, 2-Ethylhexyl2-cyano-3 3-diphenylacrylate, Ethylhexyl p-methoxy cinnamate, 2-ethylhexyl salicylate, Glyceryl Aminibenzoate, Homomenthyl Salicylate, lawsome with dihydroxyacetone, octyldimethyl PABA, 2-phenylbenzimidazole-5-sulfonic acid, triethanolamine salicylate, red petrolatum, and titanium dioxide, wherein said aqueous phase constitutes between 35% to 95% of said emulsion by weight.

2. The emulsion according to claim 1, wherein said oil phase consists essentially of:

oxybensone within a range of 2.0-6.0%, sulisobensone within a range of 5.0-10.0%, dioxybensone of 3.0%, menthyl anthranilote within a range of 3.5-5.0%, aminobenzoic acid within a range of 5.0-15.0%, amyl dimethyl PABA within a range of 1.0-5.0%, 2-ethoxyethyl p-methoxy cinnamate within a range of 1.0-3.0%, diethamolamine p-methoxy cinnamate within a range of 8.0-10.0%, digalloyl trioleate within a range of 2.0-5.0%, ethyl 4-bis (hydroxypropyl) aminobenzoate within a range of 1.0-5.0%, 2-Ethylhexyl2-cyano-3 3-diphenylacrylate within a range of 7.0-10.0%, Ethylhexyl p-methoxy cinnamate within a range of 2.0-7.5%, 2-ethylhexyl salicylate within a range of 3.0-5.0%, Glyceryl Aminibenzoate within a range of 2.0-3.0%, Homomenthyl Salicylate within a range of 4.0-15.0%, lawsome with dihydroxyacetone within a range of 3.0%, octyldimethyl PABA within a range of 1.4-8.0%, 2-phenylbenzimidazole-5-sulfonic acid within a range of 1.0-4.0%, triethanolamine salicylate within a range of 5.0-12.0%, red petrolatum within a range of 30.0-100%, and titanium dioxide within a range of 2.0-25.0%.