Infrared radiation absorbing articles and method of manufacture

Abstract

In an embodiment, a silicone coating composition, comprises a coating matrix comprising a partial condensate of a silanol of the formula R n Si(OH) 4-n , where n equals 1 or 2, and wherein R is selected from a C 1-3 alkyl radical, a vinyl radical, a 3,3,3-trifluoropropyl radical, a gamma-glycidoxypropyl radical, and a gamma-methacryloxypropyl radical; and ITO having a mean particle size of less than or equal to 60 nm as determined by dynamic light scattering; and wherein the silicone coating composition is free of colloidal silica. In another embodiment, a coated glazing, comprises a plastic substrate; and a cured silicone coating on the substrate.

I/We claim:  
     
         1 . A silicone coating composition, comprising:
 a coating matrix comprising a partial condensate of a silanol of the formula R n Si(OH) 4-n , where n equals 1 or 2, and wherein R is selected from a C 1-3  alkyl radical, a vinyl radical, a 3,3,3-trifluoropropyl radical, a gamma-glycidoxypropyl radical, and a gamma-methacryloxypropyl radical; and   ITO having a mean particle size of less than or equal to 60 nm as determined by dynamic light scattering; and   wherein the silicone coating composition is free of colloidal silica.   
     
     
         2 . The silicone coating composition of  claim 1 , wherein the coating composition comprises less than or equal to 0.05 parts by mass polymeric dispersant with respect to 1 part by mass ITO. 
     
     
         3 . The silicone coating composition of  claim 1 , wherein the coating composition comprises 0 parts by mass polymeric dispersant. 
     
     
         4 . The silicone coating composition of  claim 1 , wherein the ITO has a mean particle size of less than or equal to 45 nm as determined by dynamic light scattering. 
     
     
         5 . The silicone coating composition of  claim 1 , wherein greater than or equal to 90% of ITO particles have a diameter of less than 61 nm. 
     
     
         6 . The silicone coating composition of  claim 1 , wherein the ITO comprises particles and wherein greater than or equal to 95% of ITO particles have a diameter of less than or equal to 71 nm. 
     
     
         7 . The silicone coating composition of  claim 1 , further comprising a quaternary ammonium salt of a carboxylic acid. 
     
     
         8 . The silicone coating composition of  claim 1 , further comprising a cure catalyst selected from tetra-n-butylammonium acetate (TBAA), tetra-n-butylammonium formate, tetra-n-butylammonium benzoate, tetra-n-butylammonium-2-ethylhexanoate, tetra-n-butylammonium-p-ethylbenzoate, tetra-n-butylammonium propionate, and combinations comprising at least one of the foregoing. 
     
     
         9 . The silicone coating composition of  claim 1 , further comprising a cure catalyst is present in an amount of less than or equal to 2 wt % based upon a total weight of solids in the composition. 
     
     
         10 . The silicone coating composition of  claim 1 , wherein the silanol comprises greater than or equal to 70 wt % of CH 3 Si(OH) 3 . 
     
     
         11 . The silicone coating composition of  claim 1 , wherein the composition comprises a UV absorber. 
     
     
         12 . A coated glazing, comprising:
 a plastic substrate; and   a cured silicone coating on the substrate, wherein the cured silicone coating was formed from the silicone coating composition of  claim 1 .   
     
     
         13 . The coated glazing of  claim 12 , wherein the coated glazing has a T vis  of greater than or equal to 70% and a T ts  of less than or equal to 60%. 
     
     
         14 . The coated glazing of  claim 12 , wherein the plastic substrate comprises a material selected from polycarbonate resin, acrylic polymers, polyacrylate, polyester, polysulfone resins, and combinations comprising at least one of the foregoing. 
     
     
         15 . The coated glazing of  claim 12 , further comprising a UV protective coating on both sides of the plastic substrate. 
     
     
         16 . The coated glazing of  claim 12 , further comprising a UV protective coating on one side of the plastic substrate and an IR coating on an opposite side of the plastic substrate.