Temporary protective coating and removal system

Abstract

A coating composition for providing a temporary protective coating onto a surface of a building construction element, such as a glass window. The coating composition comprises an alkali-soluble resin comprising an acrylic polymer or copolymer. The temporary protective coating is fully soluble in and removable from the surface using an aqueous alkali solution. The invention also provides a system for providing a temporary protective coating onto a surface of a building construction element and for controllably removing said temporary protective coatings. The system includes a coating composition and a stripper comprising an aqueous alkali solution. The coating composition comprises an alkali-soluble resin comprising an acrylic polymer or copolymer.

1 . A coating composition for providing a temporary protective coating onto a surface of a building construction element, the coating composition having a VOC content of ≦30 grams/litre and comprising an alkali-soluble resin comprising an acrylic polymer or copolymer, the temporary protective coating being fully soluble in and removable from the surface using an aqueous alkali solution. 
     
     
         2 . The coating composition according to  claim 1 , wherein the coating composition has a VOC content of 520 grams/litre. 
     
     
         3 . The coating composition according to  claim 1 , wherein the coating composition is free of VOC content. 
     
     
         4 . The coating composition according to  claim 1 , wherein the temporary protective coating is removable from the surface after a period of at least three months. 
     
     
         5 . The coating composition according to  claim 1 , wherein the temporary protective coating is removable from the surface after a period of at least six months. 
     
     
         6 . The coating composition according to  claim 1 , wherein the temporary protective coating is removable from the surface after a period of at least twelve months. 
     
     
         7 . The coating composition according to  claim 6 , wherein the temporary protective coating is removable from the surface after exposure to exterior atmospheric conditions throughout said period. 
     
     
         8 . The coating composition according to  claim 1 , wherein the acrylic polymer or copolymer comprises 2-propenoic acid, 2-methyl-, polymer with ethenylbenzene, ethyl 2-propenoate, methyl 2-methyl-2-propenoate and 1,2-propanediol mono (2-methyl-2-propenoate). 
     
     
         9 . The coating composition according to  claim 1 , wherein the coating composition is free of heavy metals and/or ammonia. 
     
     
         10 . (canceled) 
     
     
         11 . The coating composition according to  claim 1 , wherein the surface of the building construction element comprises one or more of a pyrolytic coating, a vacuum deposition coating, and a titanium dioxide coating. 
     
     
         12 .- 13 . (canceled) 
     
     
         14 . The coating composition according to  claim 1 , wherein the building construction element comprises one or more of glass, smart glass, low-emissivity glass, building fenestration, and a window system. 
     
     
         15 - 18 . (canceled) 
     
     
         19 . The coating composition according to  claim 1 , wherein the building construction element has a surface comprising one of ceramic, vinyl, fiberglass, painted aluminum, anodized aluminum, and stainless steel. 
     
     
         20 . The coating composition according to  claim 1 , wherein the aqueous alkali solution has a pH≦11. 
     
     
         21 . The coating composition according to  claim 1 , wherein the coating composition further comprises one or more of a plasticizer, a leveling agent, a solvent, a surfactant, water, a biocide, a defoamer, an acrylic copolymer, a polyvinyl alcohol polymer and a polyvinyl alcohol copolymer able to crosslink the acrylic polymer or copolymer, a non-acrylic polymer to increase abrasion resistance, and an olefin-acrylate polymer to increase durability and/or slip resistance. 
     
     
         22 - 36 . (canceled) 
     
     
         37 . A system for providing a temporary protective coating onto a surface of a building construction element and for controllably removing the temporary protective coating, the system comprising a coating composition in accordance with  claim 1  and a stripper comprising an aqueous alkali solution. 
     
     
         38 . The system according to  claim 37 , wherein the aqueous alkali solution has a pH ≦ 11 . 
     
     
         39 . A building construction element coated with the coating composition of  claim 1 . 
     
     
         40 . A building construction element according to  claim 39 , wherein the building construction element comprises one of building fenestration, a window system, glass, ceramic, vinyl, fiberglass, painted aluminum, anodized aluminum and stainless steel. 
     
     
         41 . A building construction element according to  claim 39 , wherein the building construction element has a surface comprising one of a pyrolytic coating, a vacuum deposition coating and a titanium dioxide coating. 
     
     
         42 . A building construction element according to  claim 39 , wherein the coating has a dried thickness in the range of 4 to 6 microns. 
     
     
         43 - 84 . (canceled)