Stable emulsions for cosmetic products

US6403067B1 · kind B1 · utility

Assignee

• Colgate-Palmolive Company · US

Inventors

• Thomas Schamper · Chicago, US
• Suman Chopra · Sparta, US
• Bhal Moghe · Whitehouse Station, US
• John Brahms · Piscataway, US
• Mardoqueo Bustos · Fryeburg, US
• Peter R. Hilliard, Jr. · Kendall Park, US
• Marie Johansson · Watchung, US
• Claudo Ortiz
• Christine Popoff · Morganville, US

Key dates

• Filing date: May 19, 2000
• Grant date: Jun 11, 2002
• Expiry date: May 19, 2020

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61K8/894
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

Low water emulsions are described which are useful for antiperspirants and/or deodorants wherein the emulsions are made by combining (I) 15-33% of an external phase comprising: (a) 1-25% of an organic ester having a refractive index in the range of 1.43-1.60 and capable of releasing an antiperspirant active to achieve a specified conductivity; (b) a sufficient amount of a silicone copolyol to achieve a solids content of 0.25-10%; (c) a sufficient amount of a volatile silicone to achieve a total amount of the external phase as 15-33%; (c) 0-5% of a silicone elastomer (on an actives basis); and (d) 0-15% of at least one emollient; and (II) 67-85% of an internal phase comprising: (a) an effective amount of at least one cosmetically active ingredient; (b) a sufficient amount of a solvent component to dissolve the cosmetically active ingredient with a maximum amount being about 80%; (c) 0.5-15 % of water optionally containing up to 30% of an ionizable salt soluble in water; (d) 0-5 % of a non-ionic emulsifier; and (e) 0-10% ethanol; wherein: (1) the final refractive index of the composition is in the range of 1.42-1.52; and (2) the conductance of the composition is at least 250 micro Si…