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US 5,965,207 AGranted
Method of applying a polyurethane coating on engineered particleboards
AssigneeIllinois Tool Works Inc.
InventorsScott A. Kropfeld, Russell L. Cole
Life of this patent
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AssigneeIllinois Tool Works Inc.
InventorsScott A. Kropfeld, Russell L. Cole
Estimating the term…
A method of applying a smooth thin waterproof coating on engineered particleboards including oriented strand boards, thereby permitting the use of such boards for applications wherein the boards are exposed to moisture, including, for example, foundation forms, roof sheathing, basement walls, etc. The method of this invention includes applying a thin liquid cementitious coating on a surface of an engineered particleboard having a moisture content preferably less than three percent, wherein the cementitious coating fills the interstices between the particles and coats the surface. The cementitious coating is then dried and the surface is abraded to receive a thin liquid curable polyurethane coating over the cementitious coating. Finally, the exposed surface of the polyurethane coating is heated to remove surface imperfections and cure the polyurethane coating. In the preferred method, the liquid polyurethane coating is heated and cured by applying an open flame to the surface of the liquid polyurethane coating which removes surface imperfections, such as bubbles, and simultaneously cures the coating.
A method of forming a smooth polyurethane coating on a surface of an engineered particleboard firmly bonded to said surface, said engineered particle board formed of particles in a resin binder having interstices between said particles, comprising the following steps:
A method of forming a smooth polyurethane coating on a surface of an oriented strand board firmly bonded to said surface of said oriented strand board, said oriented strand board formed of wood particles in a matrix having interstices between said wood particles, comprising the following steps:
A method of forming a smooth polyurethane coating on a surface of an engineered particleboard wherein said polyurethane coating is firmly bonded on said surface of said engineered particleboard, said engineered particleboard formed of wood fibers suspended in a resin matrix wherein said wood particles are separated by interstices between said wood particles, comprising the following steps:
Dependencies are inferred from the claim text.