US 11,753,547 B2
Near-infrared absorbing composition, near-infrared absorbing film, and image sensor for solid-state imaging element
Kenji Hayashi, Hachioji (JP); Yosuke Mizutani, Mitaka (JP); Koji Daifuku, Hino (JP); and Natsumi Itamoto, Hino (JP)
Assigned to KONICA MINOLTA, INC., Tokyo (JP)
Appl. No. 17/42,519
Filed by Konica Minolta, Inc., Tokyo (JP)
PCT Filed May 13, 2019, PCT No. PCT/JP2019/018943
§ 371(c)(1), (2) Date Sep. 28, 2020,
PCT Pub. No. WO2019/221061, PCT Pub. Date Nov. 21, 2019.
Claims priority of application No. 2018-095839 (JP), filed on May 18, 2018.
Prior Publication US 2021/0024754 A1, Jan. 28, 2021
Int. Cl. C09B 57/10 (2006.01); C09B 67/20 (2006.01); G02B 5/20 (2006.01)
CPC C09B 57/10 (2013.01) [C09B 67/0069 (2013.01); G02B 5/208 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A near-infrared ray absorbing composition comprising a near-infrared absorber, a first metal compound, and a solvent,
wherein the near-infrared absorber contains a phosphonic acid metal complex,
the first metal compound is a compound having a structure represented by the following Formula (I), Formula (II), or Formula (III),
M(OR1)n  Formula (I):
Mn+(O═R2—O−)n  Formula (II):
(OR3)n-mMn+(−OCOR4)m,  Formula (III):
in the above Formulas (I), (II), and (III), M represents at least one metal element selected from the group consisting of titanium, zirconia, and aluminum; when M represents the titanium or the zirconia, n=4, m=1, 2, 3, or 4; when M represents the aluminum, n=3, m=1, 2, or 3; R1 to R4 each independently represent an alkyl group having 1 to 30 carbon atoms, and the R1 to R4 may further have a substituent,
the solvent of the near-infrared ray absorbing composition consists of a hydrocarbon solvent,
the near-infrared absorber further contains the following component (B),
Component (B): a component containing a metal complex obtained by reaction of a compound having a structure represented by the following Formula (IV) with a second metal compound,
RO—O—Z,  Formula (IV):
in the above Formula, RO represents an alkyl group having 1 to 20 carbon atoms or an aryl group having 6 to 20 carbon atoms, and RO may further have a substituent, and Z represents a structural unit selected from the following Formula (Z-2),

OG Complex Work Unit Chemistry
an asterisk (*) in the above Formula (Z-2) represents a binding site and binds 0 in the above Formula (IV),
the Formula (IV) has a structure represented by the following Formula (V) which is a compound selected from a phosphoric ester compound,

OG Complex Work Unit Chemistry
in the above Formula (V), R represents an alkyl group having 1 to 20 carbon atoms or an aryl group having 6 to 20 carbon atoms, and R may further have a substituent, Z represents a structural unit selected from Formula (Z-2), R21 to R24 each respectively represent a hydrogen atom or an alkyl group having 1 to 4 carbon atoms,
provided that the compound having a structure represented by Formula (V) has at least one partial structure satisfying the following condition (i) and at least one partial structure satisfying the condition (ii),
Condition (i): R21 to R24 all represent a hydrogen atom,
Condition (ii): at least one of R21 to R24 represents an alkyl group having 1 to 4 carbons, and
in Formula (V), I represents a number of partial structures in which R21 to R24 all are a hydrogen atom defined in the above condition (i), m represents a number of partial structures in which at least one of R21 to R24 is an alkyl group having 1 to 4 carbon atoms defined in the above condition (ii), I and m each represent a number of 1 or more, and the total number of l and m (l+m) represents a number of 2 or more.