Heat-ray shielding film, heat-ray shielding transparent laminated base material, and automobile mounted with the heat-ray shielding transparent laminated base material as window material, and building using the heat-ray shielding transparent laminated base material as window material

Abstract

There is provided a heat-ray shielding film mainly composed of polyvinyl acetal resin and capable of exhibiting excellent heat shielding properties, and a heat-ray shielding transparent laminated base material using the heat-ray shielding film, the heat-ray shielding film including: a compound having a heat-ray shielding function; a selective wavelength absorbing material; polyvinyl acetal resin, and a plasticizer; wherein the selective wavelength absorbing material has a transmittance profile in which a transmittance of a light having a wavelength of 550 nm is 90% or more, and a transmittance of a light having a wavelength of 450 nm is 40% or less.

1 . A heat-ray shielding film comprising a compound having a heat-ray shielding function, a selective wavelength absorbing material, a polyvinyl acetal resin, and a plasticizer, wherein the selective wavelength absorbing material has a transmission profile in which a transmittance of a light having a wavelength of 550 nm is 90% or more, and a transmittance of a light having a wavelength of 450 nm is 40% or less, and a weight ratio of the compound having a heat-ray shielding function and the selective wavelength absorbing material (compound having a heat-ray shielding function/selective wavelength absorbing material) is in a range of 99/1 to 70/30. 
     
     
         2 . The heat-ray shielding film according to  claim 1 , wherein composite tungsten oxide particles expressed by a general formula M y WO z  (wherein M is an element of one kind or more selected from Cs, Rb, K, Tl, In, Ba, Li, Ca, Sr, Fe, Sn, Al, and Cu, satisfying 0.1≦y≦0.5, and 2.2≦z≦3.0) and having a hexagonal crystal structure, are composed of the compound having the heat-ray shielding function. 
     
     
         3 . The heat-ray shielding film according to  claim 2 , wherein the composite tungsten oxide particles are particles having an average particle size of 40 nm or less. 
     
     
         4 . The heat-ray shielding film according to  claim 1 , wherein the selective wavelength absorbing material is at least one kind of compounds selected from an isoindoline compound, an isoindolinone compound, a quinoxaline compound, a quinophthalone compound, a condensed diazo compound, a nickel azo compound, and a bismuth vanadate compound. 
     
     
         5 . The heat-ray shielding film according to  claim 1 , wherein the selective wavelength absorbing material is at least one kind of compounds selected from a quinophthalone compound and a nickel azo compound. 
     
     
         6 . The heat-ray shielding film according to  claim 1 , wherein the selective wavelength absorbing material has a transmission profile in which transmittance of a light having a wavelength of 550 nm is 90% or more and a transmittance of a light having a wavelength of 450 nm is 15% or less. 
     
     
         7 . The heat-ray shielding film according to  claim 1 , wherein the heat-ray shielding film further contains an infrared ray-absorbing organic compound. 
     
     
         8 . The heat-ray shielding film according to  claim 7 , wherein the infrared ray-absorbing organic compound is at least one kind of compounds selected from a phthalocyanine compound, a naphthalocyanine compound, an immonium compound, a diimmonium compound, a polymethine compound, a diphenylmethane compound, a triphenylmethane compound, a quinone compound, an azo compound, a pentadiene compound, an azomethine compound, a squarylium compound, an organometallic complex, and a cyanine compound. 
     
     
         9 . The heat-ray shielding film according to  claim 8 , wherein the infrared ray-absorbing organic compound is at least one kind of compounds selected from a phthalocyanine compound and a diimmonium compound. 
     
     
         10 . The heat-ray shielding film according to  claim 7 , wherein a weight ratio of the infrared ray-absorbing organic compound and the composite tungsten oxide particles (composite tungsten oxide particles/infrared ray-absorbing organic compound) is in a range of 95/5 to 50/50. 
     
     
         11 . A heat-ray shielding transparent laminated base material wherein a heat-ray shielding film of  claim 1  is arranged between several transparent base materials. 
     
     
         12 . The heat-ray shielding transparent laminated base material according to  claim 11 , wherein an infrared ray-reflection film having a visible light transmittance of 88% or more and a solar reflectance of 21% or more is further arranged between several transparent base materials. 
     
     
         13 . The heat-ray shielding transparent laminated base material according to  claim 11 , wherein at least one of the transparent base materials is glass. 
     
     
         14 . The heat-ray shielding transparent laminated base material according to  claim 11 , wherein a visible light transmittance calculated based on JIS R 3106 is 70% or more, and a solar transmittance is 32.5% or less. 
     
     
         15 . An automobile comprising a heat-ray shielding transparent laminated base material of  claim 11  as a window material. 
     
     
         16 . A building comprising a heat-ray shielding transparent laminated base material of  claim 11  used as a window material.