Colored metallic pigment, method for the production of same and products containing same

• US 5,037,475 A
• Filed: 06/16/1989
• Issued: 08/06/1991
• Est. Priority Date: 06/16/1988
• Status: Expired due to Term

• Current Assignee: Showa Alumi Powder Kabushiki Kaisha
• Original Assignee: Showa Alumi Powder Kabushiki Kaisha
• Inventors: Kitamura, Hiroshi, Nitta, Hideto, Chida, Kyoichi, Uemura, Takyua
• Primary Examiner(s): Dixon, Jr., William R.
• Assistant Examiner(s): Green, Anthony J.
• Application Number:
  US07/366,981
• Time in Patent Office: 781 Days
• Field of Search: 106/403, 106/404, 106/266, 106/262, 523/205, 428/403
• US Class Current: 106/403
• CPC Class Codes: C01P 2004/10 extending in one dimension, e.g. needle-like
• CPC Class Codes: C01P 2004/20 extending in two dimensions, e.g. plate-like
• CPC Class Codes: C01P 2004/32 Spheres
• CPC Class Codes: C01P 2004/50 Agglomerated particles
• CPC Class Codes: C01P 2006/12 Surface area
• CPC Class Codes: C01P 2006/60 Optical properties, e.g. expressed in CIELAB-values
• CPC Class Codes: C09C 1/62 Metallic pigments or fillers C09C1/0015 takes precedence
• CPC Class Codes: C09C 1/644 treated with organic compounds, e.g. polymers
• CPC Class Codes: C09C 1/648 treated with inorganic and organic, e.g. polymeric, compounds
• CPC Class Codes: Y10T 428/2991 Coated

Abstract

A colored metallic pigment comprising a metallic pigment, a coloring pigment, and a thermally polymerized carboxylic acid having at least one double bond and at least two carboxylic groups prepared by the thermal polymerization of at least one double bond-containing carboxylic acid, the coloring pigment being chemically adsorbed on the surface of the metallic pigment via the thermally polymerized carboxylic acid. The colored metallic pigment may be coated with a polymer composed of a radical polymerizable unsaturated carboxylic acid and a monomer having at least three radical polymerizable double bond. A bright paint, bright ink and bright plastics which contain the colored metallic pigment are also disclosed.

Claims

1. A primary colored metallic pigment comprising a metallic pigment in the form of a flaky grain, a coloring pigment, and a thermally polymerized carboxylic acid having at least one double bond and at least two carboxylic groups prepared by the thermal polymerization of at least one double bond-containing carboxylic acid, the coloring pigment being chemically adsorbed on the surface of the metallic pigment via the thermally polymerized carboxylic acid.

2. The primary colored metallic pigment as claimed in claim 1, wherein said metallic pigment is at least one member selected from the group consisting of Al, Zn, Fe, Ni, Sn, Cu and Ag, and their alloys.

3. The primary colored metallic pigment as claimed in claim 2, wherein said metallic pigment is at least one member selected from the group consisting of Al and its alloys.

4. The primary colored metallic pigment as claimed in claim 1, wherein said grain has a mean grain size of from 1 to 200 μ

m and a mean thickness of from 0.1 to 5 μ

m.

5. The primary colored metallic pigment as claimed in claim 1, wherein said coloring pigment is an organic pigment.

6. The primary colored metallic pigment as claimed in claim 1, wherein said coloring pigment is an inorganic pigment.

7. The primary colored metallic pigment as claimed in claim 1, wherein said thermally polymerized carboxylic acid is a member selected from the group consisting of a thermally polymerized product obtainable by the thermal polymerization of linseed oil fatty acid, a thermally polymerized product obtainable by thermally polymerized soybean oil fatty acid, a thermally polymerized product obtainable by the thermal polymerization of linseed oil fatty acid and acrylic acid, and a thermally polymerized product obtainable by the thermal polymerization of a soybean oil fatty acid and acrylic acid.

8. The primary colored metallic pigment as claimed in claim 1, wherein said thermally polymerized carboxylic acid is from 0.2 to 10 parts by weight per 100 parts by weight of said metallic pigment.

9. The primary colored metallic pigment as claimed in claim 8, wherein said thermally polymerized carboxylic acid is from 1 to 6 parts by weight per 100 parts by weight of said metallic pigment.

10. A secondary colored metallic pigment comprising

(i) a primary colored metallic pigment comprising a metallic pigment, a coloring pigment, and a thermally polymerized carboxylic acid having at least one double bond and at least two carboxylic groups prepared by the thermal polymerization of at least one double bond-containing carboxylic acid, the coloring pigment being chemically adsorbed on the surface of the metallic pigment via the thermally polymerized carboxylic acid, and

(ii) a polymer composed of a radical polymerizable unsaturated carboxylic acid and a monomer having at least three radical polymerizable double bonds, the primary colored metallic pigment being coated with the polymer.

11. The secondary colored metallic pigment as claimed in claim 10, wherein said metallic pigment is at least one member selected from the group consisting of Al, Zn, Fe, Ni, Sn, Cu and Ag, and their alloys.

12. The secondary colored metallic pigment as claimed in claim 10, wherein said metallic pigment is at least one member selected from the group consisting of Al and its alloys.

13. The secondary colored metallic pigment as claimed in claim 10, wherein said metallic pigment is in the form of flaky grain.

14. The secondary colored metallic pigment as claimed in claim 13, wherein said grain has a mean grain size of from 1 to 200 μ

m and a mean thickness of from 0.1 to 5 μ

m.

15. The secondary colored metallic pigment as claimed in claim 10, wherein said coloring pigment is an organic pigment.

16. The secondary colored metallic pigment as claimed in claim 10, wherein said coloring pigment is an inorganic pigment.

17. The secondary colored metallic pigment as claimed in claim 10, wherein said thermally polymerized carboxylic acid is a member selected from the group consisting of a thermally polymerized product obtainable by the thermal polymerization of linseed oil fatty acid, a thermally polymerized product obtainable by thermally polymerized soybean oil fatty acid, a thermally polymerized product obtainable by the thermal polymerization of linseed oil fatty acid and acrylic acid, and a thermally polymerized product obtainable by the thermal polymerization of a soybean oil fatty acid and acrylic acid.

18. The secondary colored metallic pigment as claimed in claim 10, wherein said thermally polymerized carboxylic acid is from 0.2 to 10 parts by weight per 100 parts by weight of said metallic pigment.

19. A method for the production of a primary colored metallic pigment, comprising

a) agitating a thermally polymerized carboxylic acid having at least one double bond and at least two carboxylic groups prepared by the thermal polymerization of at least one double bond-containing carboxylic acid, and a metallic pigment in an organic solvent, for from 30 minutes to 5 hours,

b) heating up the mixture from about 50°

C. to about 150°

C. and filtering the mixture to obtain a cake,

c) cooling down the temperature of the mixture to room temperature and mixing the cake and a coloring pigment by kneading or agitating the cake and the coloring pigment in an organic solvent, and

d) removing excessive organic solvent.

20. A method for the production of a secondary colored metallic pigment, comprising

a) agitating a thermally polymerized carboxylic acid having at least one double bond and at least two carboxylic groups prepared by the thermal polymerization of at least one double bond-containing carboxylic acid, and a metallic pigment in an organic solvent, for from 30 minutes to 5 hours,

b) heating up the mixture from about 50°

C. to about 150°

C. and filtering the mixture to obtain a cake,

c) cooling down the temperature of the mixture to room temperature and mixing the cake and a coloring pigment by kneading or agitating the cake and the coloring pigment in an organic solvent,

d) adding a radical polymerizable unsaturated carboxylic acid to the mixture while dispersing and agitating the mixture in an organic solvent,

e) adding a monomer having at least three radical polymerizable unsaturated double bonds and a polymerization initiator to the mixture and polymerizing the resulting mixture, and

f) removing excessive organic solvent.