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Patent Pick: Charging Lashes

October 16, 2015 | Contact Author | By: Cosmetics & Toiletries editors
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  • Keywords/Abstract
Eyelashes 800

Keywords: mascara | L'Oréal | lashes | keratin fibers | coating | charging | color intensity | curling effect

Abstract: Patent Picks are chosen by the editors from publicly available sources. Today's highlight is a mascara from L'Oréal that gives a charging and curling effect to lashes and imparts an intense black.

Patent Picks are chosen by the editors from publicly available sources. Today's highlight is a mascara from L'Oréal that gives a charging and curling effect to lashes and imparts an intense black.

Cosmetic composition for coating keratin fibers
WIPO Patent Application WO/2015/155338
Publication date: Oct. 15, 2015
Assignee: L'Oréal

This patent application relates to a composition for coating keratin fibers such as the eyelashes. The composition includes an aqueous phase; a lamellar phase Lβ formed by an aqueous phase-structuring surfactant system having a surfactant content greater than or equal to 15% w/w; and at least one (poly)vinylpyrrolidone hydrophilic polymer > 3% w/w (solids), where the hydrophilic polymer(s) has a weight-average molecular mass Mw ranging from 1,500 to 500,000 g/mol.

According to the inventors, hard waxes are known to provide a curling effect but at high concentrations they are relatively unpleasant to apply since the texture is rigid. This invention proposes a stable mascara that has a texture thick enough to consistently deposit a charge, allowing an easy, smooth, homogenous application to the eyelashes even after two months stored at 4°C.