Prime pigment and its preparation method

A technology of base pigments and metal compounds, applied in inorganic pigment processing, chemical instruments and methods, powder coatings, etc., can solve problems such as low adhesion and easy peeling

Inactive Publication Date: 2003-09-24
MERCK PATENT GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Also due to the agglomerated particle structure, there is low adhesion between the particles, and it is easy to peel off when the actual cosmetic is used. This powder is also not preferred.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0070] Heat 2 liters of deionized water to 85°C under stirring, aiming at maintaining the pH of the solution at 9.0, simultaneously add 1480g of magnesium sulfate aqueous solution (0.45mol / l, MgSO 4 ·7H 2 O) and 32% by weight of sodium oxyoxide in water. After addition of these aqueous solutions, the suspension was filtered, washed with deionized water, and dried at 110°C. The resulting powder was observed using SEM photography to confirm that it was substantially composed of spherical particles with a structure of merged or intersecting leaflets and a particle size of 8 to 17 μm. X-ray diffraction analysis also confirmed that the powder was Mg(OH) 2 .

example 2

[0072] Heat 2 liters of deionized water to 75°C under stirring, aiming to maintain the pH of the solution at 9.0, and simultaneously add 1480g of magnesium sulfate aqueous solution (0.45mol / l, MgSO 4 ·7H 2 O) and 32% by weight aqueous sodium hydroxide solution. After addition of these aqueous solutions, the suspension was filtered, washed with deionized water, and dried at 110°C. The resulting powder was observed by SEM photography to confirm that it was substantially composed of spherical particles with a structure of merged or intersecting leaflets and a particle size of 7 to 10 μm. X-ray diffraction analysis also confirmed that the powder was Mg(OH) 2 .

example 3

[0074] Heat 2 liters of deionized water to 85°C under stirring, aiming at maintaining the pH of the solution at 9.0, simultaneously add 1350 g of water, 28.4 g of sodium sulfate and 150 g of magnesium sulfate (MgSO 4 ·7H 2 O) 1510 g of aqueous solution consisting of 32% by weight aqueous sodium hydroxide solution. After addition of these aqueous solutions, the suspension was filtered, washed with deionized water, and dried at 110°C. The obtained powder was observed by SEM photography to confirm that it was substantially composed of spherical particles with a structure of merged or intersecting leaflet-like flakes and a particle size of 5 to 30 μm. X-ray diffraction analysis also confirmed that the powder was Mg(OH) 2 .

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Abstract

A base pigment for cosmetics with good skin feel is provided, which has suitable dispersibility and combines sliding and sticking properties without sacrificing oil absorption. The base pigments contain metal compounds and have a merged and / or intersecting leaflet-like structure.

Description

technical field [0001] The invention relates to base pigments and a preparation method thereof. Background technique [0002] Spherical silica and spherical polymers composed of nylon, polyethylene and polymethacrylate are known and used as base pigments for cosmetic products. However, there is still a need for powders with good slip (spreadability) and adhesion to the skin. In addition, it is sometimes required that the base pigment also exhibit anti-slip properties while exhibiting a certain degree of slidability. Of course, the prerequisite for the base pigment is that it must have the ability to absorb fat components. In recent years, base pigments such as agglomerated pigment particles (JP-A-2001-220318, JP-A-2001-247790, etc.) aimed at improving spreadability have been disclosed, which are combined with wetting agents or various organic substances. Fragile. [0003] However, these base pigments do not have sufficient adhesion to the skin although they have good sli...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61K8/00A61K8/19A61K8/30A61K8/92A61Q1/00A61Q1/02A61Q1/12C01F5/08C01F5/22C01F5/24C08K3/00C08L101/00C09C1/02C09C3/06C09D5/03C09D7/12C09D11/02C09D11/037C09D11/16C09D11/17C09D201/00C09K21/02
CPCA61K8/19A61K2800/412A61Q1/02A61Q1/12C01F5/08C01F5/22C01F5/24C01P2004/20C01P2004/45C01P2004/61C01P2006/19C01P2006/90C09C1/028C09K21/02A61K8/022A61K8/0258A61K2800/651
Inventor 野口民生
Owner MERCK PATENT GMBH
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