Claims
- 1. A method for producing a material dispersed with ultraviolet shielding fine particles, comprising subjecting a starting material liquid mixture comprising particles comprising one or more inorganic substances having shielding abilities against ultraviolet light, one or more silicone dispersants selected from the group consisting of modified silicones and reactive silicones, and a silicone oil as dispersion media to a mill treatment and/or a high-pressure dispersion treatment to disperse the ultraviolet shielding fine particles in the silicone oil, wherein the ultraviolet shielding fine particles are dispersed in the silicone oil,wherein said ultraviolet shielding fine particles have substantially no catalytic activity, and wherein a polar solvent having good compatibility with said silicone oil is further added in at least one step selected from the group consisting of, (a) process for the preparation of the starting material liquid mixture; (b) during the mill treatment or high-pressure dispersion treatment; and (c) after the mill treatment or high-pressure dispersion treatment.
- 2. The method for producing a material dispersed with ultraviolet shielding fine particles according to claim 1, wherein said ultraviolet shielding fine particles have an average particles size of dispersed particles of from 0.01 to 5.0 μm.
- 3. The method for producing a material dispersed with ultraviolet shielding fine particles according to claim 1, wherein said ultraviolet shielding fine particles are contained in an amount of from 0.1 to 40% by weight.
- 4. The method for producing a material dispersed with ultraviolet shielding fine particles according to claim 1, wherein said particles comprising inorganic substances having shielding abilities against ultraviolet light are one or more members selected from the group consisting of TiO2, ZnO, CeO2, BaTiO3, CaTiO3, SrTiO3, and SiC.
- 5. The method for producing a material dispersed with ultraviolet shielding fine particles according to claim 1, wherein said particles comprising inorganic substances having shielding abilities against ultraviolet light comprise TiO2 particles and ZnO particles.
- 6. The method for producing a material dispersed with ultraviolet shielding fine particles according to claim 1, wherein said silicone dispersant is one or more silicone compounds selected from the group consisting of oxazoline-modified silicones, amino-modified silicones, and polyether-modified silicones.
- 7. Ultraviolet shielding fine particles or a material dispersed therewith, produced by the method of claim 1.
- 8. A method of producing a powdery product of ultraviolet shielding fine particles, comprising drying the material dispersed with ultraviolet shielding fine particles produced by the method of claim 1.
- 9. A powdery product of ultraviolet shielding fine particles produced by the method of claim 8.
- 10. Cosmetics comprising the material dispersed with ultraviolet shielding fine particles of claim 7.
- 11. Cosmetics comprising the powdery product of ultraviolet shielding fine particles of claim 9.
- 12. The method for producing a material dispersed with ultraviolet shielding fine particles according to claim 1, wherein the ultraviolet shielding fine particles are dispersed in silicone oil by a mill treatment.
- 13. The method for producing a material dispersed with ultraviolet shielding fine particles according to claim 1, wherein the reactive silicone is selected from the group consisting of amino-polyether-modified silicones, carboxyl-modified silicones, carboxyl-polyether-modified silicones, carbinol-modified silicones, mercapto-modified silicones, phenol-modified silicones, vinyl-modified silicones, hydroxy-modified silicones.
- 14. A method for producing a material dispersed with ultraviolet shielding fine particles, comprising subjecting a starting material liquid mixture comprising particles comprising one or more inorganic substances having shielding abilities against ultraviolet light, one or more reactive silicone dispersants and optionally modified silicones, and a silicone oil to a mill treatment and/or a high-pressure dispersion treatment to disperse the ultraviolet shielding fine particles in the silicone oil,wherein a polar solvent having good compatibility with said silicone oil is further added in at least one step selected from the group consisting of, (a) process for the preparation of the starting material liquid mixture; (b) during the mill treatment or high-pressure dispersion treatment; and (c) after the mill treatment or high-pressure dispersion treatment.
- 15. The method for producing a material dispersed with ultraviolet shielding fine particles according to claim 1, wherein when the ultraviolet shielding fine particles are coated with a oxide or hydrate, the oxide or hydrate is of an element selected from the group consisting of Al, Si, Zr, Mg, Zn, Ce and Ti.
- 16. The method for producing a material dispersed with ultraviolet shielding fine particles according to claim 14, wherein when the ultraviolet shielding fine particles are coated with a oxide or hydrate, the oxide or hydrate is of an element selected from the group consisting of Al, Si, Zr, Mg, Zn, Ce and Ti.
- 17. The method for producing a material dispersed with ultraviolet shielding fine particles according to claim 14, wherein said ultraviolet shielding fine particles have substantially no catalytic activity.
Priority Claims (1)
Number |
Date |
Country |
Kind |
8-160541 |
May 1996 |
JP |
|
Parent Case Info
This application is the national phase under 35 U.S.C. §371 of prior PCT International Application No. PCT/JP97/01788 which has an International filing date of May 27, 1997 which designated the United States of America.
PCT Information
Filing Document |
Filing Date |
Country |
Kind |
102e Date |
371c Date |
PCT/JP97/01788 |
|
WO |
00 |
11/20/1998 |
11/20/1998 |
Publishing Document |
Publishing Date |
Country |
Kind |
WO97/45097 |
12/4/1997 |
WO |
A |
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
4927464 |
Cowie |
May 1990 |
|
5714260 |
Okuda et al. |
Feb 1998 |
|