| US 7,498,123 B2 | ||
| Infrared dye compositions | ||
| Paul A. Cahill, Dayton, Ohio (US) | ||
| Assigned to Exciton, Inc., Dayton, Ohio (US) | ||
| Filed on Mar. 03, 2005, as Appl. No. 11/71,509. | ||
| Prior Publication US 2006/0199105 A1, Sep. 07, 2006 | ||
| Int. Cl. G03C 1/00 (2006.01) | ||
| U.S. Cl. 430—339 [430/108.2; 430/270.1; 430/338; 430/340; 430/905; 430/916; 430/944; 522/1; 522/31] | 7 Claims |
| 1. An infrared dye composition comprising:
an anionic borate moiety having the formula:
[BXaYb]− in which a and b are integers and a ranging from 0 to 3 and b ranging from 1 to 4 and a+b=4; X, which may be identical or
different, are each a halogen atom, an OH functional group, or a C1 to C20 alkyl or alicyclic radical, and Y, which may be identical or different, are each a phenyl radical, at least one Y substituted
by at least one element or electron-withdrawing substituent or by one or more halogen atoms, or an aryl radical containing
at least two aromatic ring members; and
an aminium radical cation that has at least one absorption peak in the near infrared wavelength region between about 700 and
2000 nm, the aminium radical cation having the formula:
(4-G2N—C6H4)3N+• wherein G is selected from the group consisting of methyl, ethyl, propyl, isopropyl, butyl, isobutyl, pentyl, isoamyl, hexyl,
octyl, ethylhexyl, decyl, dodecyl, and benzyl.
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