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JP-7856639-B2 - Light-absorbing composition, light-absorbing film, method for producing a light-absorbing film, and optical filter

JP7856639B2JP 7856639 B2JP7856639 B2JP 7856639B2JP-7856639-B2

Inventors

  • 久保 雄一郎
  • 高柳 良浩

Assignees

  • 日本板硝子株式会社

Dates

Publication Date
20260511
Application Date
20220411
Priority Date
20210514

Claims (20)

  1. UV absorbers having hydroxyl groups and carbonyl groups in their molecules, It contains an alkoxide having a metal component , Light-absorbing composition.
  2. The light-absorbing composition according to claim 1, wherein the hydroxyl group and the carbonyl group are separated by 1 to 3 atoms.
  3. The light-absorbing composition can form a light-absorbing film by curing the light-absorbing composition. The transmitted light incident on the light-absorbing film at an incident angle of 0 degrees has a transmission spectrum in which the transmittance T 400 at a wavelength of 400 nm is 5% or less. The light-absorbing composition according to claim 1.
  4. The light-absorbing composition according to claim 1, wherein the ultraviolet absorber comprises a benzophenone compound represented by the following formula (A1). [In formula (A1), at least one of R11 , R12 , R21 , and R22 is a hydroxyl group. In formula (A1), if R11 , R12 , R21 , or R22 is a functional group other than a hydroxyl group, there may be multiple R11s , multiple R12s , multiple R21s , or multiple R22s , and at least one of R11 , R12 , R21 , and R22 may not be present.]
  5. The light-absorbing composition according to claim 1, wherein the ultraviolet absorber comprises a benzophenone compound represented by the following formula (A2). [In formula (A2), R 31 is a hydrogen atom, a hydroxyl group, a carboxyl group, an aldehyde group, a halogen atom, a group having a halogen atom, an alkyl group having 1 to 12 carbon atoms, or an alkoxy group having 1 to 12 carbon atoms. In formula (A2), R 41 and R 42 may be a hydroxyl group, a carboxyl group, an aldehyde group, a group having a halogen atom, an alkyl group having 1 to 12 carbon atoms, an aryl group having 6 to 12 carbon atoms, or an alkoxy group having 1 to 12 carbon atoms, and R 41 and R 42 may not be present. In formula (A2), there may be multiple R 41s and multiple R 42s .]
  6. The light-absorbing composition according to claim 1, wherein the ultraviolet absorber comprises a salicylic acid compound represented by the following formula (B). [In formula (B), R 51 may be a hydroxyl group, a carboxyl group, a group containing a halogen atom, an alkyl group having 1 to 12 carbon atoms, an aryl group having 6 to 12 carbon atoms, or an alkoxy group having 1 to 12 carbon atoms. In formula (B), there may be multiple R 51s , or there may be no R 51s . In formula (B), R 52 is a hydrogen atom, an aryl group, or an aryl halide group in which one or more hydrogen atoms are substituted with halogen atoms.]
  7. The light-absorbing composition according to claim 1, wherein the metal component comprises at least one selected from the group consisting of Li, Na, Mg, Ca, Sr, Ba, Ge, Sn, Pb, Al, Ga, In, Tl, Zn, Cd, Cu, Ag, Au, Ni, Pd, Pt, Co, Rh, Ir, Fe, Mn, Cr, Mo, W, V, Nb, Ta, Ti, and Zr.
  8. The light-absorbing composition according to claim 1, further comprising a curable resin.
  9. The light-absorbing composition according to claim 8 , wherein the resin is a silicone resin.
  10. The light-absorbing composition according to claim 1, wherein the molar ratio of the content of the ultraviolet absorber to the content of the metal component is 0.001 to 10.
  11. UV absorbers having hydroxyl groups and carbonyl groups in their molecules, It contains an alkoxide having a metal component , Light-absorbing film.
  12. The light-absorbing film according to claim 11 , wherein the hydroxyl group and the carbonyl group are separated by 1 to 3 atoms.
  13. The transmitted light incident on the light-absorbing film at an incident angle of 0 degrees has a transmission spectrum in which the transmittance T 400 at a wavelength of 400 nm is 5% or less. The light-absorbing film according to claim 11 .
  14. The light-absorbing film according to claim 11 , wherein the ultraviolet absorber comprises a benzophenone compound represented by the following formula (A1). [In formula (A1), at least one of R11 , R12 , R21 , and R22 is a hydroxyl group. In formula (A1), if R11 , R12 , R21 , or R22 is a functional group other than a hydroxyl group, there may be multiple R11s , multiple R12s , multiple R21s , or multiple R22s , and at least one of R11 , R12 , R21 , and R22 may not be present.]
  15. The light-absorbing film according to claim 11 , wherein the ultraviolet absorber comprises a benzophenone compound represented by the following formula (A2). [In formula (A2), R 31 is a hydrogen atom, a hydroxyl group, a carboxyl group, an aldehyde group, a halogen atom, a group having a halogen atom, an alkyl group having 1 to 12 carbon atoms, or an alkoxy group having 1 to 12 carbon atoms. In formula (A2), R 41 and R 42 may be a hydroxyl group, a carboxyl group, an aldehyde group, a group having a halogen atom, an alkyl group having 1 to 12 carbon atoms, an aryl group having 6 to 12 carbon atoms, or an alkoxy group having 1 to 12 carbon atoms, and R 41 and R 42 may not be present. In formula (A2), there may be multiple R 41s and multiple R 42s .]
  16. The light-absorbing film according to claim 11 , wherein the ultraviolet absorber comprises a salicylic acid compound represented by the following formula (B). [In formula (B), R 51 may be a hydroxyl group, a carboxyl group, a group containing a halogen atom, an alkyl group having 1 to 12 carbon atoms, an aryl group having 6 to 12 carbon atoms, or an alkoxy group having 1 to 12 carbon atoms. In formula (B), there may be multiple R 51s , or there may be no R 51s . In formula (B), R 52 is a hydrogen atom, an aryl group, or an aryl halide group in which one or more hydrogen atoms are substituted with halogen atoms.]
  17. The light-absorbing film according to claim 11, wherein the metal component comprises at least one selected from the group consisting of Li, Na, Mg, Ca, Sr, Ba, Ge, Sn, Pb, Al, Ga, In, Tl, Zn, Cd, Cu, Ag, Au, Ni, Pd, Pt, Co, Rh, Ir, Fe, Mn, Cr, Mo, W, V, Nb, Ta, Ti, and Zr .
  18. The light-absorbing film according to claim 11 , further containing a silicone resin.
  19. Applying the light-absorbing composition according to any one of claims 1 to 10 onto a substrate, This includes heating the light-absorbing composition at a temperature of 120°C or higher. A method for manufacturing a light-absorbing film.
  20. An optical filter comprising a light-absorbing film according to any one of claims 11 to 18 .

Description

This invention relates to a light-absorbing composition, a light-absorbing film, a method for producing a light-absorbing film, and an optical filter. In imaging devices using solid-state image sensors such as CCDs (Charge Coupled Devices) or CMOSs (Complementary Metal Oxide Semiconductors), various optical filters are placed in front of the solid-state image sensor to obtain images with good color reproduction. Generally, solid-state image sensors have spectral sensitivity over a wider wavelength range than the human visual sensitivity corresponding to the visible light region. For this reason, a technique is known in which an optical filter that blocks some infrared or ultraviolet light is placed in front of the solid-state image sensor to bring the spectral sensitivity of the solid-state image sensor in the imaging device closer to the human visual sensitivity. Traditionally, optical filters typically used dielectric multilayer films to block infrared or ultraviolet light through light reflection. However, in recent years, optical filters equipped with films containing light-absorbing agents have attracted attention. Because the transmittance characteristics of optical filters with light-absorbing agents are less affected by the angle of incidence, good images with minimal color distortion can be obtained even when light enters the optical filter at an oblique angle in the imaging device. Furthermore, light-absorbing optical filters, which do not use light-reflective films, can suppress the occurrence of ghosting and flare caused by multiple reflections from light-reflective films, making it easier to obtain good images in backlit conditions and when shooting night scenes. In addition, optical filters with light-absorbing agents are advantageous in terms of miniaturization and thinning of imaging devices. As such a light-absorbing agent, a light-absorbing agent formed from phosphonic acid and copper ions is known. For example, Patent Document 1 describes an optical filter comprising a light-absorbing layer containing a light-absorbing agent formed from phosphonic acid having a phenyl group or a halogenated phenyl group (phenyl-based phosphonic acid) and copper ions. Furthermore, Patent Document 2 describes an optical filter equipped with a UV-IR absorbing layer capable of absorbing infrared and ultraviolet rays. The UV-IR absorbing layer contains a UV-IR absorbent formed from phosphonic acid and copper ions. To ensure that the optical filter satisfies predetermined optical properties, the UV-IR absorbing composition contains, for example, phenyl phosphonic acid and phosphonic acid having an alkyl group or a halogenated alkyl group (alkyl phosphonic acid). Furthermore, Patent Document 3 describes an ophthalmic device that includes a violet light vertical cutoff filter. The violet light vertical cutoff filter rapidly absorbs light with wavelengths in the range of approximately 400 nm to 450 nm. International Publication No. 2018/088561Patent No. 6232161Special Publication No. 2007-535708 Figure 1 is a cross-sectional view showing an example of a light-absorbing film according to the present invention.Figure 2A is a cross-sectional view showing an example of an optical filter according to the present invention.Figure 2B is a cross-sectional view showing an example of an optical filter according to the present invention.Figure 3 shows the transmission spectrum of the optical filter according to Example 1.Figure 4 shows the transmission spectrum of the optical filter according to Example 2.Figure 5 shows the transmission spectrum of the optical filter according to Example 3.Figure 6 shows the transmission spectrum of the optical filter according to Example 4.Figure 7 shows the transmission spectrum of the optical filter according to Example 5.Figure 8 shows the transmission spectrum of the optical filter according to Example 6.Figure 9 shows the transmission spectrum of the optical filter according to Example 7.Figure 10 shows the transmission spectrum of the optical filter according to Example 8.Figure 11 shows the transmission spectrum of the optical filter according to Example 9.Figure 12 shows the transmission spectrum of the optical filter according to Example 10.Figure 13 shows the transmission spectrum of the optical filter according to Example 11.Figure 14 shows the transmission spectrum of the optical filter according to Example 12.Figure 15 shows the transmission spectrum of the optical filter according to Example 13.Figure 16 shows the transmission spectrum of the optical filter according to Example 14.Figure 17 shows the transmission spectrum of the optical filter according to Example 15.Figure 18 shows the transmission spectrum of the optical filter according to Example 16.Figure 19 shows the transmission spectrum of the optical filter according to Example 17.Figure 20 shows the transmission spectrum of the optical filter according to Example 18.Figure 21 shows the transmission spectrum of the op