Patents

P&G Patents Method To Straighten Hair Using Sugar

Arabinose is the sugar in this recently awarded US patent.

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By: Christine Esposito

Editor-in-Chief

US Patent No. 11,154,480 B2 (Randy Purnell Washington, Jamie Angel Reed, Alan David Willey, Stevan A. Samuel); The Procter and Gamble Company has patented a method to straighten curly hair. It entails providing in a package a solid composition of a hydrophobically modified alkali soluble acrylic polymer emulsion, arabinose as the sole sugar in the composition and a photocatalyst being a mixture of 8-hydroxyquinoline and 8-quinolinol-1-oxide—and then mixing the solid composition with a cosmetically acceptable carrier to form a crosslinking composition.

The crosslinking composition is applied to curly hair at a level of 0.25 grams of composition per gram of hair, mechanically straightening the keratin fibers with a hair straightening appliance, which is at a temperature of about 50-180°C. while exposing the composition to electromagnetic radiation having a wavelength of about 380 nm.

The hair is not subjected to a relaxer prior to step and the method does include a rinsing step.

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