Browse Prior Art Database

Use of polymeric compounds, such as rheology modifiers and film-forming agents, to optimise UV-photoprotecting combinations within suncare products Disclosure Number: IPCOM000033667D
Publication Date: 2004-Dec-22
Document File: 24 page(s) / 2M

Publishing Venue

The Prior Art Database


Disclosed are rheology modifiers and film-forming agents, which are useful ingredients for the improvement of the performance of cosmetic and pharmaceutical sunscreen compositions like stability and rheological behavior but also cosmetic attractive appeal.

This text was extracted from a Microsoft Word document.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 9% of the total text.

Use of polymeric compounds, such as rheology modifiers and film-forming agents, to optimise UV-photoprotecting combinations within suncare products

Disclosed is the use of an effective UV-photoprotecting combination comprising at least one micronized organic insoluble UV-screening agent with a mean particle size ranging from 0,01 µm to 2 µm, and at least one polymeric compound, which belongs to the functional group of rheological additives and/or film-forming agents (hereby described), in cosmetic or pharmaceutical preparations.

The term functional group in this context comprises the polymers, naturals or synthetics/semi-synthetics, that are able to thicken, suspend or improve the stability of dispersions comprising the insoluble UV screening agents, like Tinosorb M, within any emulsion-types and that keep those particulate UV filters within a uniform and water-resistant layer deposited on the skin surface. 

The UV-photoprotecting combination optionally contains one or more than one further UV absorbers such as listed in Tables 1 to 3.

Preference is given to the use of the micronized organic insoluble UV-screening agent and the additional UV absorber(s) listed in Table1, 2 and 3. having a mixture ratio from 1:99 to 99:1 and most preferably from 20:80 to 80:20.

Table 1. Suitable UV filter substances which can be additionally used in cosmetic or phar­ma­ceutical preparations

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;

benzofuran derivatives, especially 2-(p-aminophenyl)benzofuran derivatives, described in EP-A-582 189, US‑A‑5 338 539, US‑A‑5 518 713 and EP‑A‑613 893;

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'-hydroxy-4'-n-octyloxyphenyl)-1,3,5-triazine; 2,4-bis{[4-(3-(2-propyloxy)-2-hydroxy-propyloxy)-...