Cosmetics containing thermally-inhibited starches

US5871756A · kind A · utility

Assignee

• National Starch and Chemical Investment Holding Copporation · US

Inventors

• Roger Jeffcoat · Bound Brook, US
• Joseph Pasapane · Morristown, US
• Donna L. Ronco · Oxford, US
• Daniel B. Solarek · Somerville, US
• Douglas J. Hanchett · Bound Brook Junction, US

Key dates

• Filing date: Jan 31, 1996
• Grant date: Feb 16, 1999
• Expiry date: Jan 31, 2016

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S424/05
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

Thermally-inhibited starches and flours are used in cosmetic compositions such as skin and hair care products as emulsifiers, thickeners, and aesthetic control agents. The starch or flour is inhibited by dehydrating the starch or flour to anhydrous or substantially anhydrous and then heat treating the dehydrated starch or flour for a time and at a temperature sufficient to inhibit the starch or flour and improve its viscosity stability when dispersed in water. The dehydration may be a thermal or a non-thermal dehydration (e.g., by alcohol extraction or freeze-drying). Preferably, the pH of the starch or flour is adjusted to a neutral or above (e.g., pH 8-9.5) prior to the dehydration and heat treatment.