Invention Grant
- Patent Title: Glitter pigment having electromagnetic wave transmission properties, composition including the pigment, and painted product including the pigment
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Application No.: US16608069Application Date: 2017-04-27
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Publication No.: US11274211B2Publication Date: 2022-03-15
- Inventor: Koichiro Nakamura
- Applicant: Nippon Sheet Glass Company, Limited
- Applicant Address: JP Tokyo
- Assignee: Nippon Sheet Glass Company, Limited
- Current Assignee: Nippon Sheet Glass Company, Limited
- Current Assignee Address: JP Tokyo
- Agency: Hamre, Schumann, Mueller & Larson, P.C.
- International Application: PCT/JP2017/016853 WO 20170427
- International Announcement: WO2018/198294 WO 20181101
- Main IPC: C09C1/00
- IPC: C09C1/00 ; C09D7/40

Abstract:
The present invention provides a glitter pigment capable of simultaneously achieving electromagnetic wave transmission properties, a high reflectance in appearance, and a neutral color in appearance. The glitter pigment according to the present invention includes: a glass flake 1; and a titanium oxide layer 2 and a silver layer 3 formed in this order on the glass flake 1, wherein a product of the optical thickness of the glass flake 1 and the optical thickness of the titanium oxide layer 2 is 61000 or more and 66000 or less when the optical thickness is expressed in nm, and the silver layer 3 has a physical thickness of 35 nm or more and 55 nm or less.
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