ULTRAVIOLET SCREENING AGENT FOR COSMETIC AND COSMETIC USING THE SAME

• Main Authors: GOTO RIKA, OKA HIDEO, YAMASHITA ATSUSHI, MATSUMOTO TAKESHI
• Format: Patent
• Language: English
• Published: 20.01.2011
• Subjects: HUMAN NECESSITIES; HYGIENE; MEDICAL OR VETERINARY SCIENCE; PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES; SPECIFIC USE OF COSMETICS OR SIMILAR TOILETPREPARATIONS

PROBLEM TO BE SOLVED: To provide an ultraviolet screening agent for cosmetics which excels in dispersibility and storage stability and excels in compounding stability and storage stability when incorporated into a cosmetic, and gives a cosmetic low-irritative to the skin, and a cosmetic using the same.SOLUTION: The ultraviolet screening agent for cosmetics includes polymer-coated metal oxide fine particles obtained by coating silica on the surface of metal oxide fine particles which are at least one kind selected from the group consisting of zinc oxide fine particles, titanium oxide fine particles, cerium oxide fine particles, zirconium oxide fine particles, and iron oxide fine particles and have a primary particle diameter of 1-100 nm as a first layer and coating a polymer on the outer side of the first layer as a second layer and further contains an polyacrylic dispersing agent having a weight average molecular weight of not smaller than 1,000 and an acid value of ≥60-≤400 mgKOH/g. The cosmetic uses this ultraviolet screening agent for cosmetics.