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Dispersion containing zinc oxide or titanium dioxide

A titanium dioxide and dispersion technology, applied in the field of dispersions, can solve the problems of poor stability and adverse effects of dispersion stability, and achieve the effect of high pigment concentration

Inactive Publication Date: 2011-04-27
SAKAI CHEM IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, in Patent Document 4, it is proposed to make a specific reactive organomodified polysiloxane into a dispersant, but this polysiloxane with functional groups has poor stability due to the presence of titanium dioxide or zinc oxide. Modification by surface activity and ion dissolution may have adverse effects on dispersion stability

Method used

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  • Dispersion containing zinc oxide or titanium dioxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] 70 parts of hydrophobized zinc oxide (FINEX-30-LPT, manufactured by Sakai Chemical Industries, the surface of zinc oxide was treated with organopolysiloxane), 22 parts of isoparaffin (PARLEAM 4, manufactured by NOF Corporation) , polyether modified polysiloxane (KF-6038, manufactured by Shin-Etsu Chemical, HLB=3.0) 8 parts and 100 parts of 0.5 mm zirconia beads were put into a mayonnaise bottle (Mayonezu bottle), mixed, and treated with a paint shaker (manufactured by Red Devil) for 1 hour. By separating the beads, a zinc oxide dispersion is obtained.

Embodiment 2

[0055] 70 parts of hydrophobized zinc oxide (FINEX-30W-LP2, manufactured by Sakai Chemical Industry Co., Ltd., the surface of zinc oxide was treated with silica and organopolysiloxane), isoparaffin (PARLEAM 4, manufactured by NOF Corporation) Manufactured) 22 parts, polyether modified polysiloxane (KF-6038, manufactured by Shin-Etsu Chemical) 8 parts and 100 parts of 0.5 mm zirconia beads were put into a mayonnaise bottle, mixed, and treated with a paint shaker (manufactured by Red Devil) for 1 hour. By separating the beads, a zinc oxide dispersion is obtained.

Embodiment 3

[0057] 60 parts of hydrophobized titanium dioxide (STR-100A-LPT, manufactured by Sakai Chemical Industry Co., Ltd., the surface of titanium dioxide was treated with silica, alumina and organopolysiloxane), isoparaffin (PARLEAM 4, NOF Corporation) company) 28 parts, polyether modified polysiloxane (KF-6038, manufactured by Shin-Etsu Chemical) 12 parts and 100 parts of 0.5 mm zirconia beads were put into a mayonnaise bottle, mixed, and treated with a paint shaker (manufactured by Red Devil) for 1 hour. A titanium dioxide dispersion is obtained by separating the beads.

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Abstract

The present invention has an object to provide a high concentration dispersion of zinc oxide or titanium dioxide which is free of volatile silicones, as well as a cosmetic composition which gives little sticky feel after spreading on the skin. The present invention relates to a dispersion which contains: zinc oxide or titanium dioxide; an isoparaffin having the average polymerization degree of 3 to 10; and a polyether-modified silicone having an HLB value of 2 to 5, as a dispersant; the amount of the zinc oxide or titanium dioxide being not less than 60% by mass of the whole amount of the dispersion.

Description

technical field [0001] The present invention provides a high pigment concentration dispersion of zinc oxide or titanium dioxide that is free of volatile polysiloxanes. The dispersion obtained in the present invention is particularly useful in the field of cosmetics such as sunscreens and foundations. Background technique [0002] It is known that particulate zinc oxide or particulate titanium dioxide has an ultraviolet absorbing function due to its unique band gap. In addition, zinc oxide or titanium dioxide in particulate form, such as a fine particle size with a primary particle size of about 10 to 100 nm, can transmit visible light with a wavelength of about 400 to 800 nm, but has the property of scattering ultraviolet rays with a wavelength shorter than the above wavelength. . Therefore, at present, particulate zinc oxide or particulate titanium dioxide are widely used as anti-ultraviolet fillers in cosmetics such as sunscreens, or pigment components added to plastics,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61K8/894A61K8/27A61K8/29A61K8/81A61Q1/02A61Q1/12A61Q17/04
CPCA61K8/29C01G23/047A61Q1/02A61K8/893A61K8/26A61K8/25C01P2006/22C01G9/02A61K8/27A61K2800/413A61K8/11A61K8/891A61K8/31A61K8/89
Inventor 渡部绫香芦田拓郎
Owner SAKAI CHEM IND CO LTD