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Decorative/Make-up cosmetic products

IP.com Disclosure Number: IPCOM000033200D
Publication Date: 2004-Dec-01

Publishing Venue

The IP.com Prior Art Database

Abstract

Disclosed are decorative/make-up cosmetic products in form of cosmetic powders, lipsticks, foundations and blush mak-up comprising photostable UV filter combinations.

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Decorative/Make-up cosmetic products

Lots of product forms for nowadays make-up applications such as cosmetic powders, lipsticks, foundations, blush etc. exist on the market. They are usually represented as solid or melted, anhydrous or hydrous formulations (end products).

Many of these end products comprise triethanolamine soaps, suspending agents, emulsifiers and co-emulsifiers, wetting or spreading agents, pigments and fillers etc..

However, the prime components of each of them are the colorants.

Coloring effects can be obtained from:

1.        inorganic pigments such as TiO2, ZnO, Iron oxides, Ultramarines, Manganese violet etc..

2.        organic pigments

3.        pearlescent pigments such as organic pearls (guanine from fish scales) or inorganic pearls ( Bismuth oxychloride, TiO2-coated micas etc.)

Beside this, another trend is growing in the decorative cosmetic field and shows consumers’ awareness for the need of a daily UV protection.

It is known from scientific literature that prolonged exposure to sunlight via the use of high SPF sun care products allow an overexposure of UV-A radiation mainly related to the skin aging process; accumulative doses of UV-A irradiation cause significant cellular damages such as DNA modification (dimerisation TT) that contribute actively to the complexion fading and all the other face imperfections.

This is the reason why the use of photo-stable broadband UV filters which absorb preferably within the UVA region is more and more recommended in make-up/decorative skin care products to help/enable defensive systems of facial skin against UV day light effects.

The following list (Table 1, 2 & 3) of UV filters represents significant tools to counter those previously described unwanted effects. These UV filters can be used as single active or as mixtures. Combinations of two or more UV filters are preferred for maximizing efficiency.

Table 1. Suitable UV filter substances which can be additionally used with mak-up applications

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 exampl...