Surface-treated pigment material

• US 4,863,800 A
• Filed: 03/06/1987
• Issued: 09/05/1989
• Est. Priority Date: 03/06/1987
• Status: Expired due to Term

• Current Assignee: Miyoshi Kasei,Inc.
• Original Assignee: Miyoshi Kasei,Inc.
• Inventors: Imai, Isao, Miyoshi, Ryota
• Primary Examiner(s): NOT, DEFINED
• Assistant Examiner(s): Monroe, James B.
• Application Number:
  US07/022,693
• Time in Patent Office: 914 Days
• Field of Search: 428/403, 428/405, 106/262, 106/308 F, 106/23, 106/27, 106/504, 424/69
• US Class Current: 428/403
• CPC Class Codes: A61K 2800/412 Microsized, i.e. having sizes between 0.1 and 100 microns
• CPC Class Codes: A61K 2800/43 Pigments; Dyes
• CPC Class Codes: A61K 8/11 Encapsulated compositions
• CPC Class Codes: A61Q 1/02 Preparations containing skin colorants, e.g. pigments preparations in powder form A61Q1/12
• CPC Class Codes: C01P 2004/61 Micrometer sized, i.e. from 1-100 micrometer
• CPC Class Codes: C01P 2004/80 Particles consisting of a mixture of two or more inorganic phases
• CPC Class Codes: C01P 2006/90 Other properties not specified above
• CPC Class Codes: C09C 3/08 Treatment with low-molecular-weight non-polymer organic compounds C09C3/006, C09C3/048 take precedence
• CPC Class Codes: C09C 3/12 Treatment with organosilicon compounds C09C3/006 takes precedence
• CPC Class Codes: Y10T 428/2991 Coated
• CPC Class Codes: Y10T 428/2993 Silicic or refractory material containing [e.g., tungsten oxide, glass, cement, etc.]
• CPC Class Codes: Y10T 428/2995 Silane, siloxane or silicone coating
• CPC Class Codes: Y10T 428/2998 including synthetic resin or polymer

Abstract

A pigment material, the surfaces of which are treated with a saturated fatty acid triglyceride having an iodine value of not more than 5. The treated pigment material, which is used in cosmetics, has strong water repellency, feels smooth, and adheres well to the skin.

Claims

1. A surface-treated pigment material consisting essentially of pigment material of which the surfaces are uniformly coated with a coating consisting essentially of a water repellent and at least one saturated fatty acid triglyceride, wherein the saturated fatty acid triglyceride has an iodine value of not more than 5 and is obtained by esterifying a saturated fatty acid having at least 12 carbon atoms or by hydrogenating a triglyceride of an unsaturated fatty acid having at least 12 carbon atoms, said triglyceride of an unsaturated fatty acid being found in natural fats, oils and waxes, and wherein the amount of saturated fatty acid triglyceride is 0.2 to 30% by weight based on the amount of pigment material to be treated.

2. A surface-treated pigment material as in claim 1, wherein the amount of saturated fatty acid triglyceride is 1 to 5% by weight based on the amount of pigment material to be treated.

3. A surface-treated pigment material as in claim 1, wherein the amount of the water repellent is 0.5 to 5% by weight based on the amount of pigment material to be treated.

4. A surface-treated pigment material as in claim 1, wherein the amount of saturated fatty acid triglyceride is 0.5 to 10% by weight based on the amount of pigment material to be treated.