Fire Resistant Coatings for Wood Veneer Panels

Abstract

Methods for treating panels are described that include coating a wood substrate with a polymeric solution, curing the coated wood substrate by subjecting the coated wood to ultraviolet radiation and causing the polymeric solution to crosslink to produce a fire-resistant veneer. Also described is a composite material comprising a wood substrate layer, and a UV-cured flame retardant coating the wood substrate layer, wherein the composite material has a Flame Spread Index values within 0 to 25 and a Smoke Developed Index of 450 or lower.

What is claimed is: 
     
         1 . A method for treating panels comprising:
 coating a wood substrate with a polymeric solution; and   curing the coated wood substrate by subjecting the coated wood to ultraviolet radiation and causing the polymeric solution to crosslink to produce a fire-resistant veneer.   
     
     
         2 . The method of  claim 1 , wherein the coating is applied by rolling. 
     
     
         3 . The method of  claim 1 , comprising adhering the wood substrate to a metallic backing. 
     
     
         4 . The method of  claim 1 , wherein the cured panel has flammability resistance with a Flame Spread Index value within 0 to 25 and a Smoke Developed Index of 450 or lower. 
     
     
         5 . The method of  claim 1 , wherein the coating is urethane acrylate. 
     
     
         6 . The method of  claim 1 , further comprising applying a second coating and curing the second coating by applying ultraviolet radiation to the second coating. 
     
     
         7 . The method of  claim 6 , wherein the second coating is urethane acrylate. 
     
     
         8 . The method of  claim 1 , wherein the ultraviolet radiation has a wavelength of about 365 nm. 
     
     
         9 . A composite material comprising:
 a wood substrate layer; and   an ultraviolet radiation-cured flame retardant coating the wood substrate layer, wherein the composite material has a Flame Spread Index values within 0 to 25 and a Smoke Developed Index of 450 or lower.   
     
     
         10 . The composite material of  claim 9 , further comprising a base layer and an adhesive between the base layer and the wood substrate. 
     
     
         11 . The composite material of  claim 10 , wherein the base layer comprises a metal. 
     
     
         12 . The composite material of  claim 10 , wherein the adhesive meets Class A flammability standard. 
     
     
         13 . The composite material of  claim 9 , wherein the coating comprises urethane acrylate. 
     
     
         14 . The composite material of  claim 9 , wherein the coating has a thickness of less than 385 microns. 
     
     
         15 . The composite material of  claim 14 , wherein the coating has a thickness of approximately 375 microns. 
     
     
         16 . The composite material of  claim 9 , wherein the wood substrate layer comprises one or more of oak, pine, and maple.