INFRARED REFLECTING BLACK PIGMENT, AND PAINT AND RESIN COMPOSITION USING THE INFRARED REFLECTING BLACK PIGMENT

• US 20120270986A1
• Filed: 11/09/2010
• Published: 10/25/2012
• Est. Priority Date: 11/11/2009
• Status: Active Grant

• Current Assignee: TODA Kogyo Corporation
• Original Assignee: TODA Kogyo Corporation
• Inventors: Maruyama, Shinsuke, Akai, Hiroshi, Sanada, Kazutoshi, Fujii, Yasuhiko, Nishimoto, Kazushi
• Granted Patent: US 8,546,475 B2
• Time in Patent Office: Days
• US Class Current: 524/413
• CPC Class Codes: C01G 49/0072 containing manganese
• CPC Class Codes: C01P 2004/62 Submicrometer sized, i.e. from 0.1-1 micrometer
• CPC Class Codes: C01P 2006/12 Surface area
• CPC Class Codes: C01P 2006/62 L* (lightness axis)
• CPC Class Codes: C01P 2006/63 a* (red-green axis)
• CPC Class Codes: C01P 2006/64 b* (yellow-blue axis)
• CPC Class Codes: C09C 1/22 Compounds of iron C09C1/0009, C09C1/0015, C09C1/0078 take precedence
• CPC Class Codes: C09D 5/004 Reflecting paints; Signal paints
• CPC Class Codes: C09D 5/028 Pigments; Filters
• CPC Class Codes: C09D 7/61 inorganic
• CPC Class Codes: G02B 5/223 containing organic substances, e.g. dyes, inks or pigments

Abstract

The present invention provides an inexpensive infrared reflecting black pigment which comprises Fe and Mn but comprises no harmful elements, and exhibits an excellent infrared reflecting property. The infrared reflecting black pigment according to the present invention comprises a compound comprising Fe, Mn and at least one element selected from the group consisting of Mg, Al, Ca, Si, Sr and Ba, and has a blackness (L* value) of not more than 30 and a solar radiation reflectance of not less than 15%.

Claims

1. An infrared reflecting black pigment comprising a compound comprising Fe, Mn and at least one element selected from the group consisting of Mg, Al, Ca, Si, Sr and Ba, which infrared reflecting black pigment has a blackness (L* value) of not more than 30 and a solar radiation reflectance of not less than 15%.

2. An infrared reflecting black pigment according to claim 1, wherein the compound comprising Fe, Mn and at least one element selected from the group consisting of Mg, Al, Ca, Si, Sr and Ba is in the form of a composite oxide.

3. An infrared reflecting black pigment according to claim 1, wherein the black pigment comprises a mixture of an Mn—

Fe composite oxide and a compound comprising at least one element selected from the group consisting of Mg, Al, Ca, Si, Sr and Ba.

4. An infrared reflecting black pigment according to claim 3, wherein the compound comprising at least one element selected from the group consisting of Mg, Al, Ca, Si, Sr and Ba is mixed in an amount of 20 to 300 parts by weight based on 100 parts by weight of the Mn—

Fe composite oxide.

5. A paint comprising a paint base material comprising the infrared reflecting black pigment as defined in claim 1.

6. A colored resin composition comprising the infrared reflecting black pigment as defined in claim 1, and a resin.