Powder additive to reduce the damage of bleaching and colouring agents

US10869816B2 · kind B2 · utility

Assignees

• HENKEL IP & HOLDING GMBH · DE
• Henkel AG & Co. KGaA · DE

Inventors

• Hartmut Manneck · Klein Wesenberg, DE
• Thomas Hippe · Appen, DE
• Marc Stucky · Rancho Palos Verdes, US
• Stephanie A. Smith · Champaign, US
• Robert Schaeffler · Elmira, US

Key dates

• Filing date: Apr 29, 2019
• Grant date: Dec 22, 2020
• Expiry date: Apr 29, 2039

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61K2800/805
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

A powder additive for a keratin fiber coloring or bleaching agent or developer is provided. The powder additive includes a dicarboxylic acid containing from about 2 to about 10 carbon atoms, selected from the group of malic acid, D-tartaric acid, L-tartaric acid, meso-tartaric acid, racemic acid, alpha-ketoglutaric acid, beta-ketoglutaric acid, oxaloacetic acid, maleic acid, fumaric acid, oxalic acid, malonic acid, succinic acid, glutaric acid, adipic acid, pimelic acid, azelaic acid, sorbic acid, a salt of these dicarboxylic acids, and mixtures thereof. The powder additive also includes an amino acid or a salt of an amino acid and an alkalisilicate. The powder additive has no greater than about 10% by weight water, based on the weight of the powder additive. In addition, the powder additive includes particles and at least about 80% of the particles have an average particle size of less than 200 μm.