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Patent Picks—Natural Genipin Dye, Stopping Grays, Boosting Suds and More in Hair
By: Rachel L. Grabenhofer, Cosmetics & Toiletries
Posted: May 22, 2013
page 3 of 3
Genipin for natural pigments, dyes
WIPO Patent Application WO/2013/070682
Publication date: May 16, 2013
Assignee: Wild Flavors, Inc., S Wu and G Horn
This patent discloses a method for preparing genipin-rich materials from the fruit of Genipa americana fruit for their use as a cross-linking agent and as a raw material to produce colors. The resulting materials can be used in a broad range of applications including personal care, cosmetics, dietary supplements, packaging, foodstuffs and drugs. The colorant produced can be further concentrated or deposited on clay or other carriers and used in foods; cosmetics such as toothpaste, makeup, hair dye; and textiles. The genipin-rich extract is hydrolyzed to remove a methyl group and convert the genipin to genipinic acid which further reacts with amine-containing compounds, with extra organic acid present and under anaerobic conditions to generate red pigment. Heating can be used to accelerate red pigment formation. The red solution can be further purified on an ion exchange column and the eluted material can be concentrated on a rotary vacuum evaporator. The genipa red is a heat-stable pigment, and is also stable at a high pH.
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