METHOD FOR PREPARING ULTRAVIOLET RADIATION-ABSORBING COMPOSITION

PROBLEM TO BE SOLVED: To provide a method for improving the preservation stability of a personal care formulation containing an ultraviolet absorber.SOLUTION: The method for improving the preservation stability of the formulation is characterized in that: (a) its composition contains at least one ki...

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Bibliographische Detailangaben
Hauptverfasser:	WEINSTEIN BARRY, CHANG CHING-JEN, JONES CHARLES ELWOOD
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS HUMAN NECESSITIES HYGIENE MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS MEDICAL OR VETERINARY SCIENCE METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES SPECIFIC USE OF COSMETICS OR SIMILAR TOILETPREPARATIONS THEIR PREPARATION OR CHEMICAL WORKING-UP USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a method for improving the preservation stability of a personal care formulation containing an ultraviolet absorber.SOLUTION: The method for improving the preservation stability of the formulation is characterized in that: (a) its composition contains at least one kind of an ultraviolet absorber, (b) latex polymer particles have voids and 50-1,000 nm particle sizes, and (c) the latex polymer particles have shell parts prepared by one or more steps selected from (i) the polymerization for incorporating 4-80% monomer unit of an ethylenically polyunsaturated monomer based on the whole weight of the shell part, and (ii) the polymerization for incorporating one or more monomer units of polyfunctional monomers each having at least one vinylic copolymerizable functional group and at least one functional group capable of reacting with a reactive molecule effective for forming the crosslink after the polymerization, and is obtained by adding 5-70% latex polymer particles based on the whole weight of nonvolatile materials to the composition.