# US 10,865,120 B2 · Green pigment

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 10,865,120 B2
- Document ID: US10865120B2
- Status: Granted
- Kind: B2
- Application number: 15/910,974
- Filed: 2018-03-02
- Published: 2019-05-23
- Granted: 2020-12-15
- Earliest claimed: 2018-03-02
- Assignees: Helvetia Pigmente AG
- Applicants: Helvetia Pigmente AG
- Inventors: Sascha Broll
- Web page: https://patentgrep.com/patent/US10865120B2

## CPC

- C01G 53/42: containing alkali metals, e.g. LiNiO2
- C01G 33/006: {Compounds containing niobium, with or without oxygen or hydrogen, and containing two or more other elements}
- C01G 51/42: containing alkali metals, e.g. LiCoO2
- C01G 53/40: Complex oxides containing nickel and at least one other metal element
- C09D 7/61: inorganic
- C01P 2002/32: spinel-type (AB2O4)
- C01P 2002/72: by d-values or two theta-values, e.g. as X-ray diagram
- C01P 2006/62: L* (lightness axis)
- C01P 2006/63: a* (red-green axis)
- C01P 2006/64: b* (yellow-blue axis)
- C01G: COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F (metal hydrides {monoborane, diborane or addition complexes thereof} C01B6/00; salts of oxyacids of halogens C01B11/00; peroxides, salts or peroxyacids C01B15/00; thiosulfates, dithionites, polythionates C01B17/64; compounds containing selenium, or tellurium C01B19/00; binary compounds of nitrogen with metals C01B21/06; azides C01B21/08; {compounds containing nitrogen, other non-metals and metal C01B21/082}; metal amides C01B21/092; nitrites C01B21/50; {compounds of noble gases C01B23/0005}; phosphides C01B25/08; salts of oxyacids of phosphorus C01B25/16; carbides C01B32/90; compounds containing silicon C01B33/00; compounds containing boron C01B35/00; compounds having molecular sieve properties but not having base-exchange properties C01B37/00; compounds having molecular sieve and base-exchange properties, e.g. crystalline zeolites, C01B39/00; cyanides C01C3/08; salts of cyanamide C01C3/16; thiocyanates C01C3/20)
- C09D: COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR (cosmetics A61K; processes for applying liquids or other fluent materials to surfaces, in general, B05D; staining wood B27K5/02; glazes or vitreous enamels C03C; natural resins, French polish, drying-oils, driers, turpentine, per se, C09F; polishing compositions other than French polish, ski waxes C09G; adhesives or use of materials as adhesives C09J; materials for sealing or packing joints or covers C09K3/10; materials for stopping leaks C09K3/12; processes for the electrolytic or electrophoretic production of coatings C25D)
- C01P: INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS

## Abstract

An inorganic green pigment includes a material with spinel structure of the general formula selected from the following formulas a) (A1−xB1+x)(C3−x−yD2xB1−x−2yNi3y)O8, wherein 0.05≤x≤0.9 and 0.05≤y≤0.5, and wherein x+2y≤1; b) (A1−xB1+x)(C3−x−yD2x−yB1−x−yNi2y)O8, wherein 0.05≤x≤0.5 and 0.05≤y≤0.5; c) (A1−xB1+x)(C3−x−4yD2xB1−x+yNby)O8, wherein 0.05≤x≤0.5 and 0.05≤y≤0.2; d) (A1−xB1+x)(C3−xD2x−2yB1−x+yNby)O8, wherein 0.05≤x≤0.9 and 0.05≤y≤0.2, and wherein x≥y; and e) (A1−xB1+x)(C3−x−3yD2xB1−xNb2yNiy)O8, wherein 0.05≤x≤0.9 and 0.05≤y≤0.2, wherein A is at least one element selected from Co, Zn, Ca, Mg and Cu, wherein B is at least one element selected from Li and Na, wherein C is at least one element selected from Ti, Mn, Sn and Ge, and wherein D is at least one element selected from Cr, B, Fe, Mn and Al.

## Claims

### Claim 1

A green pigment, comprising a material with spinel structure of a formula selected from the following formulas:
a) (A1−xB1+x)(C3−x−yD2xB1−x−2yNi3y)O8, wherein 0.05≤x≤0.9 and 0.05≤y≤0.5, and wherein x+2y≤1;
b) (A1−xB1+x)(C3−x−yD2x−yB1−x−yNi2y)O8, wherein 0.05≤x≤0.5 and 0.05≤y≤0.5;
c) (A1−xB1+x)(C3−x−4yD2xB1−x+yNby)O8, wherein 0.05≤x≤0.5 and 0.05≤y≤0.2;
d) (A1−xB1+x)(C3−xD2x−2yB1−x+yNby)O8, wherein 0.05≤x≤0.9 and 0.05≤y≤0.2, and wherein x≥y; and
e) (A1−xB1+x)(C3−x−3yD2xB1−xNb2yNiy)O8, wherein 0.05≤x≤0.9 and 0.05≤y≤0.2,
wherein in said formulas A is at least one element selected from Co, Zn, Ca, Mg and Cu, B is at least one element selected from Li and Na, C is at least one element selected from Ti, Mn, Sn and Ge, and D is at least one element selected from Cr, B, Fe, Mn and Al.

### Claim 2 (depends on 1)

The green pigment of claim 1, wherein the green pigment is a nickel-containing mixed oxide selected from (Co1−xLi1+x)(Ti3−x−yCr2xLi1−x−2yNi3y)O8 and (Co1−xLi1+x)(Ti3−xCr2x−yLi1−x−yNi2y)O8.

### Claim 3 (depends on 1)

The green pigment of claim 1, wherein the green pigment is a niobium-containing mixed oxide selected from (Co1−xLi1+x)(Ti3−x−4yCr2xLi1−x+yNb3y)O8, and (Co1−xLi1+x)(Ti3−xCr2x−2yLi1−x+yNby)O8.

### Claim 4 (depends on 1)

The green pigment of claim 1, wherein the green pigment is a nickel and niobium containing mixed oxide of the formula (Co1−xLi1+x)(Ti3−x−3yCr2xLi1−xNb2yNiy)O8.

### Claim 5 (depends on 1)

The green pigment of claim 1, having a nickel release of less than 80 mg/kg and a Cobalt release of less than 30 mg/kg, according to DIN EN 71.3:2013-05.

### Claim 6

A method for producing a green pigment, said method comprising the steps of:
producing a mixture by mixing carbonates, nitrates, oxalates, phosphates, hydroxides, fluorides, borates, or corresponding metal organic compounds of metals selected from Co, Zn, Ca, Mg, Cu, Li, Na, Ti, Mn, Sn, Ge, Cr, B, Fe, Mn, Al, Ni and Nb; and
calcining the mixture at a temperature from 900° C. to 1400° C. for 1 h to 3 h to form a pigment of a formula selected from the following formulas
a) (A1−xB1+x)(C3−x−yD2xB1−x−2yNi3y)O8, wherein 0.05≤x≤0.9 and 0.05≤y≤0.5, and wherein x+2y≤1;
b) (A1−xB1+x)(C3−x−yD2x−yB1−x−yNi2y)O8, wherein 0.05≤x≤0.5 and 0.05≤y≤0.5;
c) (A1−xB1+x)(C3−x−4yD2xB1−x+yNby)O8, wherein 0.05≤x≤0.5 and 0.05≤y≤0.2;
d) (A1−xB1+x)(C3−xD2x−2yB1−x+yNby)O8, wherein 0.05≤x≤0.9 and 0.05≤y≤0.2, and wherein x≥y; and
e) (A1−xB1+x)(C3−x−3yD2xB1−xNb2yNiy)O8, wherein 0.05≤x≤0.9 and 0.05≤y≤0.2,
wherein in said formulas A is at least one element selected from Co, Zn, Ca, Mg and Cu, B is at least one element selected from Li and Na, C is at least one element selected from Ti, Mn, Sn and Ge, and D is at least one element selected from Cr, B, Fe, Mn and Al.

### Claim 7 (depends on 6)

The method of claim 6, further comprising after the calcining step, milling the calcinated mixture in a ball mill.

### Claim 8 (depends on 1)

A paint composition, a plastic or a coating containing the green pigment of claim 1.