# US 9,519,081 B2 · Optical laminate film, infrared shielding film and infrared shielding body > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,519,081 B2 - Document ID: US9519081B2 - Status: Granted - Kind: B2 - Application number: 14/364,507 - Filed: 2012-12-10 - Published: 2014-10-30 - Granted: 2016-12-13 - Earliest claimed: 2011-12-12 - Assignees: Konica Minolta, Inc. - Applicants: Konica Minolta, Inc. - Inventors: Yukako Taka; Takahiko Nojima - Web page: https://patentgrep.com/patent/US9519081B2 ## CPC - G02B 1/10: Optical coatings produced by application to, or surface treatment of, optical elements (G02B1/08 takes precedence) - C09D 5/004: {Reflecting paints; Signal paints} - G02B 1/11: Anti-reflection coatings - G02B 1/113: using inorganic layer materials only - G02B 5/208: {for use with infrared or ultraviolet radiation, e.g. for separating visible light from infrared and/or ultraviolet radiation} - G02B 5/22: Absorbing filters {(G02B5/201 - G02B5/208 take precedence)} - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS - C09D: COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR (cosmetics A61K; processes for applying liquids or other fluent materials to surfaces, in general, B05D; staining wood B27K5/02; glazes or vitreous enamels C03C; natural resins, French polish, drying-oils, driers, turpentine, per se, C09F; polishing compositions other than French polish, ski waxes C09G; adhesives or use of materials as adhesives C09J; materials for sealing or packing joints or covers C09K3/10; materials for stopping leaks C09K3/12; processes for the electrolytic or electrophoretic production of coatings C25D) ## Abstract Provided are an optical laminate film superior in film flexibility and film surface uniformity, has high light transmittance in a predetermined wavelength region, and is superior in light shielding properties in another predetermined wavelength region, an infrared shielding film, a method of manufacturing an infrared shielding film, and an infrared shielding body provided with the infrared shielding film. The optical laminate film has, on a substrate, at least one unit constituted of a high refractive index layer and a low refractive index layer containing metal oxide particles and silanol modified polyvinyl alcohol. ## Claims ### Claim 1 An optical laminate film comprising, on a substrate, at least one unit constituted of a high refractive index layer, and a low refractive index layer comprising metal oxide particles, unmodified polyvinyl alcohol having a polymerization degree of 1500 to 5000 and a silanol modified polyvinyl alcohol. ### Claim 2 (depends on 1) The optical laminate film according to claim 1, wherein the silanol modified polyvinyl alcohol is contained in an amount of 10 to 25% by mass based on 100% by mass of the total solid content of the low refractive index layer. ### Claim 3 (depends on 2) The optical laminate film according to claim 2, wherein the undermost refractive index layer closest to the substrate has a thickness of 5 to 12 times an average thickness of other refractive index layers. ### Claim 4 (depends on 3) The optical laminate film according to claim 3, wherein the high refractive index layer comprises a second silanol modified polyvinyl alcohol. ### Claim 5 (depends on 4) The optical laminate film according to claim 4, wherein the content of the second silanol modified polyvinyl alcohol is 1 to 40% by mass based on 100% by mass of the total solid content of the high refractive index layer. ### Claim 6 (depends on 1) The optical laminate film according to claim 1, wherein the high refractive index layer comprises rutile type titanium oxide. ### Claim 7 (depends on 1) The optical laminate film according to claim 1, wherein the high refractive index layer comprises a second silanol modified polyvinyl alcohol. ### Claim 8 (depends on 1) The optical laminate film according to claim 1, wherein at least one layer of the low refractive index layer or the high refractive index layer comprises at least one kind of a boron compound selected from the group consisting of boric acid, borate salt, and borax. ### Claim 9 (depends on 1) An infrared shielding body comprising, on at least one side of a base structure, the optical laminate film according to claim 1. ### Claim 10 (depends on 1) The optical laminate film according to claim 1, wherein there is a region in which the reflectance is more than 50% in a region with a wavelength of 900 nm to 1400 nm. ### Claim 11 (depends on 10) The optical laminate film according to claim 10, wherein the transmittance in a visible light region is not less than 50%. ### Claim 12 (depends on 11) The optical laminate film according to claim 11, wherein the total number of the high refractive index layers and the low refractive index layers is not more than 100. ### Claim 13 (depends on 12) The optical laminate film according to claim 12, wherein the entire thickness is 12 μm to 315 μm. ### Claim 14 (depends on 1) The optical laminate film according to claim 1, wherein the film comprises at least one functional layer on the opposite side of the substrate. ### Claim 15 A method of manufacturing an optical laminate film, comprising the steps of: applying, onto a substrate, a coating liquid for low refractive index layer comprising metal oxide particles, a silanol modified polyvinyl alcohol, a binder resin and an aqueous solvent, wherein the binder resin contained in the coating liquid for the low refractive index layer comprises an unmodified polyvinyl alcohol having a polymerization degree of 1500 to 5000, and a coating liquid for high refractive index layer comprising a binder resin and an aqueous solvent; and drying the substrate coated with the coating liquids. ### Claim 16 (depends on 15) The method of manufacturing an optical laminate film according to claim 15, wherein the substrate comprises an undercoat layer. ### Claim 17 (depends on 16) The method of manufacturing an optical laminate film according to claim 16, wherein the step of applying the coating liquids is a step of carrying out simultaneous multi-layer coating of the coating liquids. ### Claim 18 An optical laminate film comprising, on a substrate, at least one unit constituted of a high refractive index layer comprising a first silanol modified polyvinyl alcohol, and a low refractive index layer comprising metal oxide particles and a second silanol modified polyvinyl alcohol. ### Claim 19 (depends on 18) The optical laminate film according to claim 18, wherein the second silanol modified polyvinyl alcohol is contained in an amount of 10 to 25% by mass based on 100% by mass of the total solid content of the low refractive index layer. ### Claim 20 (depends on 19) The optical laminate film according to claim 19, wherein the undermost refractive index layer closest to the substrate has a thickness of 5 to 12 times an average thickness of other refractive index layers. ### Claim 21 (depends on 19) The optical laminate film according to claim 19, wherein the low refractive index layer further comprises unmodified polyvinyl alcohol having a polymerization degree of 1500 to 5000. ### Claim 22 (depends on 18) The optical laminate film according to claim 18, wherein the content of the first silanol modified polyvinyl alcohol is 1 to 40% by mass based on 100% by mass of the total solid content of the high refractive index layer. ### Claim 23 (depends on 18) The optical laminate film according to claim 18, wherein the high refractive index layer comprises rutile type titanium oxide. ### Claim 24 (depends on 18) The optical laminate film according to claim 18, wherein at least one layer of the low refractive index layer or the high refractive index layer comprises at least one kind of a boron compound selected from the group consisting of boric acid, borate salt, and borax. ### Claim 25 (depends on 18) An infrared shielding body comprising, on at least one side of a base structure, the optical laminate film according to claim 18. ### Claim 26 (depends on 18) The optical laminate film according to claim 18, wherein there is a region in which the reflectance is more than 50% in a region with a wavelength of 900 nm to 1400 nm. ### Claim 27 (depends on 26) The optical laminate film according to claim 26, wherein the transmittance in a visible light region is not less than 50%. ### Claim 28 (depends on 27) The optical laminate film according to claim 27, wherein the total number of the high refractive index layers and the low refractive index layers is not more than 100. ### Claim 29 (depends on 28) The optical laminate film according to claim 28, wherein the entire thickness is 12 μm to 315 μm. ### Claim 30 (depends on 18) The optical laminate film according to claim 18, wherein the film comprises at least one functional layer on the opposite side of the substrate. ### Claim 31 A method of manufacturing an optical laminate film, comprising the steps of: applying, onto a substrate, a coating liquid for a high refractive index layer comprising a first silanol modified polyvinyl alcohol, a binder resin and an aqueous solvent, and a coating liquid for a low refractive index layer comprising metal oxide particles, a second silanol modified polyvinyl alcohol, a binder resin and an aqueous solvent; and drying the substrate coated with the coating liquids. ### Claim 32 (depends on 31) The method of manufacturing an optical laminate film according to claim 31, wherein the substrate comprises an undercoat layer. ### Claim 33 (depends on 32) The method of manufacturing an optical laminate film according to claim 32, wherein the step of applying the coating liquids is a step of carrying out simultaneous multi-layer coating of the coating liquids.