Sun blocking stack

Abstract

A multilayer sunshield lamination structure formed on a sheet of vitreous material which includes at least one functional layer composed of a silver-based material that reflects infrared radiation and at least two dielectric coatings, each functional layer being surrounded by dielectric coatings. The lamination structure may include an essentially metal absorbent material based on at least one of the following elements; Pd, Pt, Au, Ir, Rh, Ru, Os, Co, Ni, Cu, Cr, La, Ce, Pr, Nd, W, Si, Zn, Mo, Mn, Ti, V, Nb, Hf, Ta and alloys thereof included in the functional layer or as part of a separate layer in direct contact with the functional layer. The lamination structure, when deposited on an ordinary clear soda-lime float glass sheet 6 mm thick, has a solar factor SF of less than 45% and a light transmission LT of less than 70%.

1 - 32 . (canceled) 
     
     
         33 . A multilayer sunshield lamination structure formed on a sheet of vitreous material comprising:
 at least one functional layer comprising silver;   a first dielectric coating deposited directly onto the sheet of vitreous material;   a second dielectric coating deposited on a side of the functional layer opposite the side of the first dielectric coating; and   an essentially metal absorbent material based on at least one of the following elements: Pd, Pt, Au, Ir, Rh, Ru, Os, Co, Ni, Cu, Cr, La, Ce, Pr, Nd, W, Si, Zn, Mo, Mn, Ti, V, Nb, Hf, Ta and alloys thereof wherein the essentially absorbent metal is included in the functional layer or at least partially forms part of a separate layer from the functional layer deposited under or on, and in direct contact with, the functional layer.   wherein each functional layer is surrounded by dielectric coatings,   wherein said lamination structure, when deposited on an ordinary clear soda-lime float glass sheet 6 mm thick, has a solar factor SF of less than 45% and a light transmission LT of less than 70%, and   wherein a dielectric coating on an outside of the lamination structure includes at least one zinc-tin mixed oxide-based layer containing at least 20% tin and/or a barrier layer to oxygen diffusion with a thickness of more than 5 nm selected from among the following materials: ZrN, SiC, SiO x C y , TaC, TiN, TiC, CrC, DLC and alloys thereof, and nitrides or oxynitrides of alloys such as SiAlO x N y  or SiTi x N y .   
     
     
         34 . A lamination structure according  claim 33 , wherein the absorbent material is included in the functional layer. 
     
     
         35 . A lamination structure according to  claim 34 , wherein the functional layer contains 1 to 30 atom % of absorbent material as alloy with, or doped with, the silver. 
     
     
         36 . A lamination structure according to  claim 35 , wherein the functional layer contains 5 to 10 atom % absorbent material. 
     
     
         37 . A lamination structure according to  claim 35 , wherein the absorbent material included in the functional layer is selected from among the following materials: Os, Co, Pd, Pt, Ir, Ru, and Rh. 
     
     
         38 . A lamination structure according to  claim 33 , wherein the absorbent material at least partially forms part of a separate layer from the functional layer deposited under or on, and in direct contact with, the functional layer. 
     
     
         39 . A lamination structure according to  claim 38 , wherein the absorbent material forms an alloy with a sacrificial metal layer for protection of the functional layer. 
     
     
         40 . A lamination structure according to  claim 38 , wherein the absorbent material constitutes the major part of said separate layer deposited under or on, and in direct contact with, the functional layer. 
     
     
         41 . A lamination structure according to  claim 40 , wherein the separate layer of absorbent material has a physical thickness of between 0.3 and 10 nm. 
     
     
         42 . A lamination structure according to  claim 41 , wherein the separate layer of absorbent material has a physical thickness of between 0.8 and 3 nm. 
     
     
         43 . A lamination structure according to  claim 33 , wherein the absorbent material is selected from at least one of the following elements: Pt, Pd, Co, Ir, Ru, Rh, Os, CoCr, Ti and NiCr and alloys thereof. 
     
     
         44 . A lamination structure according to  claim 43 , wherein the absorbent material is palladium. 
     
     
         45 . A lamination structure according to  claim 33 , wherein 4 to 35% of the light absorption of the lamination structure is attributable to the absorbent material. 
     
     
         46 . A lamination structure according to  claim 33 , wherein the first dielectric coating and the outer dielectric coating comprise at least one zinc-tin mixed oxide-based layer containing at least 20% tin. 
     
     
         47 . A lamination structure according to  claim 40 , wherein the lamination structure contains at least the following sequence of layers in order starting with the sheet of vitreous material:
 a) a first dielectric coating,   b) a silver-based functional layer,   c) an absorbent layer,   d) optionally, one or two sacrificial metal layers, which may be sub-oxidised, selected from one or a combination of the following materials: Ti, Ni, Cr, Nb, Zn, Zr, Al, Ta and alloys thereof, and   e) an outer dielectric layer.   
     
     
         48 . A lamination structure according to  claim 33 , comprising at least two functional layers separated by at least one intermediate dielectric coating. 
     
     
         49 . A lamination structure according to  claim 47 , wherein the lamination structure contains at least the following sequence of layers in order starting with the sheet of vitreous material:
 a) a first dielectric coating,   b) a first silver-based functional layer,   c) one or two sacrificial metal layers, which may be sub-oxidised, selected from one or several of the following materials: Ti, Ni, Cr, Nb, Zn, Zr, Al, Ta and alloys thereof,   d) an intermediate dielectric coating,   e) a second silver-based functional layer,   f) an absorbent layer,   g) optionally, one or two sacrificial metal layers, possibly sub-oxidised, selected from one or a combination of the following materials: Ti, Ni, Cr, Nb, Zn, Zr, Al, Ta and alloys thereof, and   h) an outer dielectric layer.   
     
     
         50 . A lamination structure according to  claim 47 , wherein the lamination structure contains at least the following sequence of layers in order starting with the sheet of vitreous material:
 a) a first dielectric coating including at least one zinc-tin mixed oxide-based layer,   b) a first silver-based functional layer,   c) one or two sacrificial metal layers, which may be sub-oxidised, selected from one or a combination of the following materials: Ti, Ni, Cr, Nb, Zn, Zr, Al, Ta and alloys thereof,   d) an intermediate dielectric coating,   e) a second silver-based functional layer,   f) a palladium-based absorbent layer,   g) optionally, one or two sacrificial metal layers, which may be sub-oxidised, selected from one or a combination of the following materials: Ti, Ni, Cr, Nb, Zn, Zr, Al, Ta and alloys thereof, and   h) an outer dielectric layer including at least one zinc-tin mixed oxide-based layer.   
     
     
         51 . A lamination structure according to  claim 33 , wherein the lamination structure is finished by a thin carbon-based protective layer with a thickness of 1.5 to 10 nm. 
     
     
         52 . A glass sheet bearing a lamination structure according to  claim 33 . 
     
     
         53 . A glass sheet according to  claim 52 , wherein it has a tint tested in reflection on the glass side represented by:
 (a-1) L* in the range of between 30 and 55,   (b-1) a* in the range of between −4 and +3, and   (c-1) b* in the range of between −4 and 16.   
     
     
         54 . A glass sheet according to  claim 52 , wherein the glass was subjected to a toughening and/or bending thermal treatment after deposition of the multilayer lamination structure. 
     
     
         55 . A glass sheet according to  claim 54 , wherein 4 to 35% of the light absorption of the lamination structure after thermal treatment is attributable to the absorbent material. 
     
     
         56 . A multiple glazing comprising a glass sheet according to  claim 52 . 
     
     
         57 . A multiple glazing according to  claim 56 , wherein the multiple glazing has a solar factor SF in the range of between 15 and 40%, a light transmission of at least 30% and a colour that is relatively neutral in transmission and neutral to slightly bluish in reflection on a side of the glass sheet bearing the lamination structure. 
     
     
         58 . A multiple glazing according to  claim 57 , wherein the multiple glazing has
 (a-1) a solar factor SF in the range of between 20 and 35%, and   (b-1) a light transmission of at least 45%.   
     
     
         59 . A multiple glazing according to  claim 56 , wherein the multiple glazing has a tint in reflection on the side of the glass sheet bearing the lamination structure, wherein the lamination structure is arranged towards the inside space of the multiple glazing, represented by
 (a-1) L* in the range of between 40 and 55,   (b-1) a* in the range of between 1.5 and −6, and   (c-1) b* in the range of between −3 and −15.