Title:
【発明の名称】表面被覆酸化物粒子及びそれを用いる化粧料
Document Type and Number:
Japanese Patent JP3002171
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To obtain oxide particles having excellent dispersibility and reduced catalytic activity by forming a polymerization catalyst on the surfaces of particles of an oxide selected among titanium oxide, zinc oxide, and cerium oxide and polymerizing a polymerizable monomer to coat their surfaces with a polymer. SOLUTION: The core material of an oxide particle may be a hydrated oxide. Rutile, anatase, monoclinic, or amorphous titanium oxide particles are desirable, and among them rutile titanium oxide is particularly desirable. The oxide particles used are desirably ones having a mean article diameter of 0.002-1 μm for use in cosmetics. The coating amount of the high-molecular polymer is usually 1-500 pts.wt. per 100 pts.wt. core material. The high-molecular polymer is particularly desirably an olefin resin. The polymerization catalyst used in the polyolefin coating is desirably a coordinated anion catalyst.
Inventors:
Ryuji Nakao
Application Number:
JP8849698A
Publication Date:
January 24, 2000
Filing Date:
April 01, 1998
Export Citation:
Assignee:
Otsuka Chemical Co., Ltd.
International Classes:
A61K8/00; A61K8/29; A61K8/58; A61Q17/04; C01F17/00; C01G9/02; C01G23/04; C09C1/00; C09C1/04; C09C1/36; C09C3/10; (IPC1-7): C09C3/10; A61K7/42; C01G9/02; C01G23/04; C09C1/00; C09C1/04; C09C1/36
Domestic Patent References:
| JP1272606A | ||||
| JP9208864A | ||||
| JP63179972A | ||||
| JP50129496A | ||||
| JP10204316A |
Attorney, Agent or Firm:
Contents Makoto (1 person outside)