Pigment Mixtures

• US 20100291014A1
• Filed: 05/13/2010
• Published: 11/18/2010
• Est. Priority Date: 05/15/2009
• Status: Active Grant

• Current Assignee: Merck Patent Gesellschaft Mit Beschränkter Haftung
• Original Assignee: Merck Patent GmbH (Merck & Co., Inc.)
• Inventors: Peng, Qinyun, Tellefsen, Mark
• Granted Patent: US 10,639,247 B2
• Time in Patent Office: Days
• US Class Current: 424/63
• 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 2800/59 Mixtures
• CPC Class Codes: A61K 2800/612 By organic compounds
• CPC Class Codes: A61K 2800/651 The particulate/core comprising inorganic material
• CPC Class Codes: A61K 2800/872 Pencils; Crayons; Felt-tip pens
• CPC Class Codes: A61K 8/0241 Containing particulates characterized by their shape and/or structure see also A61K8/04, A61K8/11, and A61K8/14, further aspects are classified in A61K2800/40 and subcodes
• CPC Class Codes: A61K 8/0254 Platelets; Flakes
• CPC Class Codes: A61K 8/19 containing inorganic ingredients
• CPC Class Codes: A61K 8/25 Silicon; Compounds thereof
• CPC Class Codes: A61K 8/26 Aluminium; Compounds thereof
• CPC Class Codes: A61K 8/361 Carboxylic acids having more than seven carbon atoms in an unbroken chain; Salts or anhydrides thereof
• CPC Class Codes: A61Q 1/02 Preparations containing skin colorants, e.g. pigments preparations in powder form A61Q1/12
• CPC Class Codes: A61Q 1/04 for lips
• CPC Class Codes: A61Q 1/10 for eyes, e.g. eyeliner, mascara
• CPC Class Codes: A61Q 1/12 Face or body powders for grooming, adorning or absorbing

Abstract

Disclosed are pigment mixtures containing at least two components, where component A contains bismuth oxychloride (BiOCl) or boron nitride (BN) and component B contains synthetic flakes treated with at least one metal soap or mineral flakes treated with at least one metal soap and to the use thereof especially in cosmetic formulations.

Claims

1. A pigment mixture comprising at least two components, where component A comprises bismuth oxychloride (BiOCl) or boron nitride (BN) and component B comprises synthetic flakes treated with at least one metal soap or mineral flakes treated with at least one metal soap.

2. A pigment mixture according to claim 1, wherein component A is bismuth oxychloride (BiOCl).

3. A pigment mixture according to claim 1, wherein component B comprises synthetic flakes which are mica, silica, alumina, borosilicate, and/or aluminosilicate.

4. A pigment mixture according to claim 1, wherein component B comprises mineral flakes which are of mica, clay, talc and/or kaolin.

5. A pigment mixture according to claim 1, wherein component B comprises natural or synthetic mica flakes treated with a metal soap.

6. A pigment mixture according to claim 1, wherein component B comprises synthetic or mineral flakes in the particle size range of 1-100 μ

m.

7. A pigment mixture according to claim 1, wherein component B comprises synthetic or natural mica flakes in the particle size range of 1-100 μ

m.

8. A pigment mixture according to claim 1, wherein the metal soap is an alkaline earth metal stearate or branched or non-linear isostearate or a mixture thereof.

9. A pigment mixture according to claim 1, wherein metal soap is an alkaline earth metal stearate which is magnesium stearate, barium stearate, zinc stearate, aluminum stearate, or calcium stearate or a mixture thereof.

10. A pigment mixture according to claim 1, wherein the metal soap is hydrogenated ricinoleate, arachidate, palmitate, oleate, myristate, laurate, caprate or caprylate or a mixture thereof.

11. A pigment mixture according to claim 1, wherein component B comprises natural or synthetic mica flakes treated with magnesium stearate or zinc stearate.

12. A pigment mixture according to claim 1, wherein component A and component B are mixed in a ratio of 10:

90 to 90;

10 by weight.

13. A pigment mixture according to claim 1, wherein component A and component B are mixed in a ratio of 30:

70 to 70;

30 by weight.

14. A pigment mixture according to claim 1, further comprising another powder, a cosmetic grade of zinc oxide, titanium dioxide, iron oxide, ultramarine pigments, manganese violet, carmine, chromium oxide green, iron blue or organic pigments, a FD&

C or D&

C colorant.

15. A pigment mixture according to claim 1, comprising by weight %

68.6% synthetic or natural mica and 1.4% magnesium stearate as component B, and 30% BiOCl as component A;

or

68.6% synthetic or natural mica and 1.4% magnesium stearate as component B, and 15% BiOCl as component A, and 15% zinc oxide;

or

68.6% synthetic or natural mica and 1.4% magnesium stearate as component B, and 25% BiOCl as component A, and 5% zinc oxide;

or

49% synthetic or natural mica and 1% magnesium stearate as component B, and 50% BiOCl as component A;

or

49% synthetic or natural mica and 1% magnesium stearate as component B, and 45% BiOCl as component A, and 5% zinc oxide.

16. A pigment mixture according to claim 1, further comprising at least one constituent selected from the group consisting of absorbents, astringents, antimicrobial substances, antioxidants, antiperspirants, antifoaming agents, antidandruff active ingredients, antistatics, binders, biological additives, bleaching agents, chelating agents, deodorants, emollients, emulsifiers, emulsion stabilisers, dyes, humectants, film formers, fillers, odour substances, flavour substances, insect repellents, preservatives, anticorrosion agents, cosmetic oils, solvents, oxidants, vegetable constituents, buffer substances, reducing agents, surfactants, propellant gases, opacifiers, UV filters and UV absorbers, denaturing agents, viscosity regulators, perfume and vitamins.

17. A process for preparing a pigment mixture according to claim 1, comprising blending component A and component B and optionally further constituents, or mixing component A and natural or synthetic flakes and the metal soap and optionally further constituents as a suspension in water and then dewatering and drying the suspension.

18. A cosmetic composition comprising a pigment mixture according to claim 1 and a cosmetically acceptable carrier.