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US 2014/0178318 A1Published application
Novel compounds
AssigneeDsm IP Assets B.V.
InventorsAnne JANSSEN, Christine MENDROK-EDINGER, Alexander SCHLIFKE-POSCHALKO
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Abstract
Methods of making polyglycerol based UV-filters, topical compositions comprising such polyglycerol based UV-filters and the use of such novel polyglycerol based UV-filters to enhance the solubility of butyl methoxydibenzoylmethane or bis-ethylhexyloxyphenol methoxyphenyl triazine in cosmetic oils are provided.
Claims12
A process for making a polyglycerol-based UV filter comprising the sequential steps of:
- (a) conducting ring-opening polymerization of x mol equivalents of glycidol using 1 mol equivalent of a polyol starter unit with y mol equivalents hydroxyl-groups. followed by
- (b) conducting block copolymerization with z×(x+y) mol equivalents of propyleneoxide to form a hyperbranched polyether-polyol backbone carrying (x+y) mol equivalents hydroxyl-groups, followed by
- (c) esterifying 30-80% of the hydroxyl groups with 2-(4-Diethylamino-2-hydroxybenzoyl)benzoic acid, wherein
- x is an integer from 3-16, y is an integer from 1-6, and z is an integer from 0-10.
1 more element
Dependencies are inferred from the claim text.