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Patent Picks—Soy, Vitamin D Stabilizer, Dispersion Technologies and More in Sun
By: Rachel L. Grabenhofer
Posted: May 1, 2013
page 2 of 3
Therefore, the purpose of this invention is to protect cholecalciferol from photodegradation. It has surprisingly been found that specific alkoxycrylene compounds significantly increase the photostability of cholecalciferol in a composition by 2 to 3-fold. It does so by quenching the excited state energy from cholecalciferol and transferring it.
Encapsulated UV actives
WIPO Patent Application WO/2013/059167
Publication date: April 25, 2013
Assignee: Rohm and Haas Chemicals, LLC, and Dow Global Technologies, LLC
Described here are methods for encapsulating personal care active ingredients, comprising: a) preparing an aqueous phase consisting of partially hydrolyzed polyvinyl alcohol and a cosmetically acceptable non-ionic surfactant; b) preparing an oil phase consisting of the active and isocyanate or polyisocyanate; c) homogenizing the aqueous phase and oil phase to form an emulsion with particles less than one micron in size; and d) forming a dispersion of polyurea core-shell particles containing the personal care active by contacting the emulsion with an aqueous amine solution.
In some embodiments of this invention, the core of the microcapsule contains at least two actives, such as one UV absorber in the UV-A range (290-325 nm) and one in the UV-B range (325-400 nm). Specifically, the UV-A absorber may be avobenzone and the UV-B absorber, homosalate (3,3,5-trimethylcyclohexyl salicylate). Note that when avobenzone is present, preferably octyl methoxycinnamate is not.
Aqueous dispersions of polyurethane and nanoparticles
WIPO Patent Application WO/2013/059106
Publication date: April 25, 2013
Assignee: Bayer Materialscience LLC, S Unal, Y Berezkin, PD Schmitt, KW Haider and RN Hunt
This patent disclosure is directed to aqueous dispersions comprising polyurethane and nanoparticles, and processes for preparing them. The dispersions are prepared by reacting isocyanate groups present on the polyurethane chain ends with free amine groups on a hydroxy- or amino- functionalized nanoparticle to covalently attach the polyurethane and the nanoparticle through urethane or urea linkages, respectively. Said nanocomposite dispersions can be applied in skin care, cosmetics and deodorants for various benefits. In certain embodiments, for example, nanoparticulate zinc oxide and/or titanium dioxide may be covalently incorporated for incorporation into a sunscreen formulation.
Folic acid-fermented soybean biopolymer for skin benefits
US Patent 8431364
Publication date: April 30, 2013
Assignee: Damy Chemical Co., Ltd.
Described by this invention is a folyl extract of fermented soybean (EFS) produced by fermenting a culture of folic acid and soybean extract, and a composition including the folyl EFS. This material has reportedly shown anti-histamine, anti-allergic, calcium-absorption-promotion, bone and cell growth-promotion, collagen biosynthesis, wrinkle improvement and UV-induced cell damage inhibition effects. Accordingly, the folyl EFS can be used in external skin, cosmetic, health supplement, food, feed and pharmaceutical compositions.