Infrared radiation reflector and infrared radiation transmitting composition

• US 6,366,397 B1
• Filed: 03/10/2000
• Issued: 04/02/2002
• Est. Priority Date: 03/10/2000
• Status: Expired due to Term

• Current Assignee: NTT Advanced Technology Corporation (Nippon Telegraph and Telephone Corporation), Origin Electric Company Limited
• Original Assignee: NTT Advanced Technology Corporation (Nippon Telegraph and Telephone Corporation)
• Inventors: Genjima, Yasuhiro, Mochizuki, Haruhiko
• Primary Examiner(s): Spyrou, Cassandra
• Assistant Examiner(s): Amari, Alessandro V.
• Application Number:
  US09/523,451
• Time in Patent Office: 753 Days
• Field of Search: 359/350, 359/360, 359/359, 428/424.6, 428/403, 428/324
• US Class Current: 359/359
• CPC Class Codes: C08K 3/013 Fillers, pigments or reinforcing additives
• CPC Class Codes: C08K 3/08 Metals
• CPC Class Codes: C08K 3/22 of metals
• CPC Class Codes: C08K 5/0041 Optical brightening agents, organic pigments
• CPC Class Codes: C08K 9/02 Ingredients treated with inorganic substances
• CPC Class Codes: C09D 7/41 Organic pigments; Organic dyes
• CPC Class Codes: C09D 7/61 inorganic
• CPC Class Codes: C09D 7/67 Particle size smaller than 100 nm
• CPC Class Codes: C09D 7/68 Particle size between 100-1000 nm
• CPC Class Codes: C09D 7/69 Particle size larger than 1000 nm
• CPC Class Codes: F21V 7/24 characterised by the material
• CPC Class Codes: F21V 7/28 characterised by coatings
• CPC Class Codes: F21V 9/04 for filtering out infrared radiation dichroic reflectors F21V7/22; using liquid-filled chambers F21V9/12

Abstract

The infrared reflector of the present invention has an infrared-reflecting layer and an infrared-permeable layer which is formed on the infrared-reflecting layer. The infrared-reflecting layer has a reflectance of 60% or more and a permeability of 25% or less with respect to infrared rays having a wavelength within a range of 800 to 2600 nanometers. The infrared-permeable layer has a reflectance of less than 60%, an absorbance of 50% or less, and a permeability of 30% or more with respect to infrared rays having a wavelength within a range of 800 to 2600 nanometers. The infrared-permeable layer contains resin components and pigments, and the amount of carbon black contained in the infrared-permeable layer is 0.1 wt % or less.

Claims

1. An infrared reflector having an infrared-reflecting layer and an infrared-permeable layer which is formed on said infrared-reflecting layer, said infrared-reflecting layer having a reflectance of 60% or more and a permeability of 25% or less with respect to infrared rays having a wavelength within a range of 800 to 2600 nanometers, and said infrared-permeable layer having a reflectance of less than 60%, an absorbance of 50% or less, and a permeability of 30% or more with respect to infrared rays having a wavelength within a range of 800 to 2600 nanometers, the sum of said reflectance, said absorbance, and said permeability of said infrared-permeable layer being 100%, said infrared-permeable layer containing resin components and pigments, and an amount of carbon black contained in said infrared-permeable layer being 0.1 wt % or less, wherein said infrared-reflecting layer contains a resin component and one or two or more pigments selected from a group containing iron oxide powder, titanium oxide powder, scaly aluminum powder, stainless steel powder, and mica powder covered with titanium oxide, and an amount of said pigments contained in said infrared-reflecting layer is within a range of 10 to 80 wt %.

2. An infrared reflector in accordance with claim 1, wherein said pigment within said infrared-permeable layer comprises one or two or more selected from a group containing iron oxide pigment, titanium oxide pigment, composite oxide system pigment, titanium oxide-coated mica pigment, iron oxide-coated mica pigment, scaly aluminum pigment, zinc oxide pigment, metallic phthalocyanine pigment, non-metallic phthalocyanine pigment, chlorinated phthalocyanine pigment, chlorinated-brominated phthalocyanine pigment, brominated phthalocyanine pigment, anthraquinone, quinacridone system pigment, diketo-pyrrolipyrrole system pigment, perylene system pigment, monoazo system pigment, diazo system pigment, condensed azo system pigment, metal complex system pigment, quinophthalone system pigment, Indanthrene Blue pigment, dioxadene violet pigment, anthraquinone pigment, metal complex pigment, and benzimidazolone system pigment.

3. An infrared reflector in accordance with claim 1, wherein said pigment within said infrared-permeable layer contains azomethine system pigment and/or perylene system pigment.

4. An infrared reflector in accordance with claim 1, wherein an amount of said pigment in said infrared-permeable layer is within a range of 0.01 to 80 wt %.

5. An infrared reflector in accordance with claim 1, characterized in that said resin component in said infrared-permeable layer comprises one or two or more selected from a group containing alkyd resin, phthalic acid resin, vinyl resin, acrylic resin, fluorine resin, polyamide resin, unsaturated polyester resin, water-soluble resin, chlorinated polyolefin resin, amino resin, polyurethane resin, silicone resin, acrylic-silicone resin, xylene resin, petroleum resin, ketone resin liquid polybutadiene, rosin-denatured maleic acid resin, coumarone resin, ethyl silicate, resin for powdered paints, resin for ultraviolet ray curing, epoxy resin, olefin resin, phenol resin, polyethylene resin, ethylene-vinyl acetate copolymer resin, polypropylene resin, polystyrene resin, AS resin, ABS resin, methacrylic resin, polyvinyl chloride resin, polyamide resin, polycarbonate resin, polyethylene terephthalate resin, polybutylene terephthalate resin, diallylphthalate resin, urea resin, melamine resin, xylene resin, phenol resin, unsaturated polyester resin, epoxy resin, furan resin, polybutadiene resin, polyurethane resin, melamine phenol resin, chlorinated polyethylene resin, vinylidene chloride resin, acrylic-vinyl chloride copolymer resin, AAS resin, ACS resin, polyacetal resin, polymethylpentene resin, polyphenylene oxide resin, denatured PPO resin, polyphenylene sulfide resin, butadiene styrene resin, polyamino bismaleimide resin, polysulfone resin, polybutylene resin, silicone resin, polyethylene tetrafluoride resin, polyethylene fluoride propylene resin, perfluoro alkoxy fluoride plastic, polyvinylidene fluoride resin, MBS resin, methacrylic-styrene resin, polyimide resin, polyallylate resin, polyallylsulfone resin, polyethersulfone resin, and polyether etherketone resin.

6. An infrared reflector in accordance with claim 1, wherein an average grain diameter of said pigment in said infrared-permeable layer is within a range of 0.01 to 30 micrometers.

7. An infrared reflector having an infrared-reflecting layer and an infrared-permeable layer which is formed on said infrared-reflecting layer, said infrared-reflecting layer having a reflectance of 60% or more and a permeability of 25 % or less with respect to infrared rays having a wavelength within a range of 800 to 2600 nanometers, and said infrared-permeable layer having a reflectance of less than 60%, an absorbance of 50% or less, and a permeability of 30% or more with respect to infrared rays having a wavelength within a range of 800 to 2600 nanometers, the sum of said reflectance, said absorbance, and said permeability of said infrared-permeable layer being 100%, said infrared-permeable layer containing resin components and pigments, and an amount of carbon black contained in said infrared-permeable layer being 0.1 wt % or less, wherein said infrared reflective layer comprises metal, white glass, white ceramic, or a metal film formed on a surface of a base member, said pigment within said infrared-permeable layer contains an azomethine system pigment and/or a perylene system pigment, and an amount of said pigment in said infrared-permeable layer is within a range of 0.01 to 80 wt %.