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UV-photoprotecting composition in W/O emulsions

IP.com Disclosure Number: IPCOM000031164D
Publication Date: 2004-Sep-15
Document File: 20 page(s) / 1M

Publishing Venue

The IP.com Prior Art Database

Abstract

Described is the use of an effective UV-photoprotecting composition that contains at least one micronized organic insoluble UV-screening agent with a mean particle size from 0.01 µm to 2 µm in cosmetic or pharmaceutical W/O or W/Si preparations.

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UV-photoprotecting composition in W/O emulsions

Hereby is presented the use of an effective UV-photoprotecting composition that contains at least one micronized organic insoluble UV-screening agent with a mean particle size from 0.01 µm to 2 µm in cosmetic or pharmaceutical W/O or W/Si preparations.

These cosmetic or pharmaceutical preparations comprise at least

-          one aqueous phase

-          one fatty phase which may optionally contain non-surface active silicones such as siloxanes, silanols, silicone elastomers and resins or alkyl-modified silicones, and

-          one or more emulsifier systems, or mixture thereof, well suited for W/O emulsions and/or W/Si emulsions.

The UV-photoprotecting combination may or should additionally contain one or more than one further UV absorbers as listed in Tables 1 and 2.

Preference is given to the use of mixing ratios of the micronized organic insoluble UV-screening agent and the additional UV absorbers listed in Tables1 and 2. Ratios are preferably from 1:99 to 99:1 and most preferably from 20:80 to 80:20.

The micronized organic insoluble UV-screening agent is preferably selected from benzotriazole derivatives.

Preferred benzotriazole derivatives are compounds of formula

, wherein

T2 is C1-C12alkyl or phenyl-substituted C1-C12alkyl.

A most preferred benzotriazole derivative is the micronized compound of formula

(Methylene Bis-Benzotriazolyl Tetramethylbutylphenol).

Additionally, UV filters listed in Tables 1 and 2 may be used in combination with the micronized UV-screening agent:

Table 1: Suitable UV filter substances which can be additionally used in combination with the micronized UV-screening agent

p-aminobenzoic acid derivatives, for example 4-dimethylaminobenzoic acid 2-ethylhexyl ester;

salicylic acid derivatives, for example salicylic acid 2-ethylhexyl ester;

benzophenone derivatives, for example 2-hydroxy-4-methoxybenzophenone and its 5‑sulfonic acid derivative;

dibenzoylmethane derivatives, for example 1-(4-tert-butylphenyl)-3-(4-methoxyphenyl)­propane-1,3-dione;

diphenylacrylates, for example 2-ethylhexyl 2-cyano-3,3-diphenylacrylate, and 3-(benzo­fura­nyl) 2-cyanoacrylate;

3-imidazol-4-ylacrylic acid and esters;

polymeric UV absorbers, for example the benzylidene malonate derivatives described in EP‑A‑709 080;

cinnamic acid derivatives, for example the 4‑methoxycinnamic acid 2-ethylhexyl ester and isoamyl ester or cinnamic acid derivatives described in US‑A‑5 601 811 and WO 97/00851;

camphor derivatives, for example 3-(4'-methyl)benzylidene-bornan-2-one, 3-benzyl­idene­bornan-2-one, N-[2(and 4)-2-oxyborn-3-ylidene-methyl)-benzyl]­acrylamide polymer, 3-(4'-trimethyl­ammonium)-benzylidene-bornan-2-one methyl sulfate, 3,3'-(1,4-phenylenedimethine)-bis(7,7-dimethyl-2-oxo-bi­cyclo[2.2.1­]hep­tane-1-methanesulfonic acid) and salts, 3-(4'-sulfo)­benzylidene-bornan-2-one and salts; camphorbenzalkonium methosulfate;

hydroxyphenyltriazine compounds, for example 2-(4'-methoxyphenyl)-4,6-bis(2'-hy­...