Laminate, kit, method for producing laminate, and optical sensor

Patent metadata

Field	Value
Publication number	US-11635557-B2
Application number	US-201816230836-A
Country	US
Kind code	B2
Filing date	Dec 21, 2018
Priority date	Jul 15, 2016
Publication date	Apr 25, 2023
Grant date	Apr 25, 2023

Abstract

Provided is a laminate having a good whiteness and a high infrared-shielding property. Provided are also a kit forming the above-mentioned laminate, a method for producing a laminate, and an optical sensor. The laminate includes an infrared-shielding layer and a white layer, in which the infrared-shielding layer is a layer that shields at least a part of a wavelength range at 800 to 1,500 nm, and the white layer has a value of L* of 35 to 100, a value of a* of −20 to 20, and a value of b* of −40 to 30 in a L*a*b* color coordinate system of CIE 1976.

First claim

What is claimed is:

1. A kit for forming a laminate having an infrared-shielding layer and a white layer, comprising:
a composition for forming an infrared-shielding layer containing a compound having a maximum absorption wavelength in a wavelength range at 800 to 1,500 nm; and
a composition for forming a white layer, including a white pigment and having a value of L* of 35 to 75 in a L*a*b* color coordinate system of CIE 1976 in a case of forming a film with a thickness of 3 μm,
wherein the composition for forming a white layer includes an alkali-soluble resin having an acid value of 30 to 120 mgKOH/g, a radically polymerizable compound having a molecular weight of 100 to 1,500, and a photopolymerization initiator.

2. The kit according to claim 1 ,
wherein the composition for forming a white layer includes a chain transfer agent.

3. The kit according to claim 1 ,
wherein the white pigment is in the form of particles having an average primary particle diameter of 50 to 150 nm.

4. The kit according to claim 3 ,
wherein the content of the particles having an average primary particle diameter of 50 to 150 nm is 30% to 60% by mass with respect to the total solid content of the composition for forming a white layer.

5. The kit according to claim 1 ,
wherein the white pigment is titanium oxide.

6. The kit according to claim 1 ,
wherein the composition for forming an infrared-shielding layer contains at least one selected from tungsten oxide containing an alkali metal, a pyrrolopyrrole compound, a cyanine compound, a phthalocyanine compound, a naphthalocyanine compound, a tetraazaporphyrin compound, a diimmonium compound, a squarylium compound, and a copper complex.

7. The kit according to claim 1 ,
wherein the composition for forming an infrared-shielding layer contains tungsten oxide containing an alkali metal.

8. An optical sensor comprising a laminate, wherein:
the laminate comprises an infrared-shielding layer and a white layer,
the infrared-shielding layer is a layer that shields at least a part of a wavelength range at 800 to 1,500 nm, and has an average transmittance in a wavelength range of 400 to 700 nm of 60% to 100%, and
the white layer has a value of L* of 35 to 100, a value of a* of −20 to 20, and a value of b* of −40 to 30 in a L*a*b* color coordinate system of CIE 1976, and has an average transmittance in a wavelength range of 400 to 700 nm of 10% to 50%.

Assignees

• Fujifilm Corp

Inventors

• Taguchi Yoshinori
• Arimura Keisuke

Classifications

• G03F7/028

  with photosensitivity-increasing substances, e.g. photoinitiators · CPC title

• B32B7/023 Primary

  Optical properties · CPC title

• C08F2/50 Primary

  with sensitising agents · CPC title

• C08F220/22

  Esters containing halogen · CPC title

• B32B27/20

  using fillers, pigments, thixotroping agents · CPC title