Fibrous cementitious plank assembly having a protective film and method of making same
AssigneeJames Hardie Research Pty Limited
InventorsWeiling Peng, Jeffrey Bergh
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Abstract
A building material having a durable exterior finish comprising a fiber cement substrate laminated with a fluorohydrocarbon protective film. The protective film provides the fiber cement substrate with resistance to weathering and maintains the surface texture of the underlying fiber cement substrate while providing an aesthetically pleasing and uniform pre-finish on the exterior surface. The protective film is bonded to the fiber cement substrate using an adhesive composition comprised of a one-component moisture cure polyurethane or polyurea adhesive composition having a reactive isocyanate compound or a two component polyurethane or polyurea composition.
Claims23
A building material assembly comprising:
- a fiber reinforced substrate having an exterior surface wherein the exterior surface comprises hydroxyl functional groups;
- a fluorohydrocarbon film having a bonding surface;
- and
- a first layer of adhesive positioned between the exterior surface of the substrate and the bonding surface of the fluorohydrocarbon film so as to form a bond therebetween, wherein the adhesive comprises an isocyanate compound, wherein the isocyanate compound wets the bonding surface of the fluorohydrocarbon film and forms a physical bond with the film without requiring treatment of the bonding surface of the film, wherein the adhesive further comprises a catalyst that catalyzes a reaction between the isocyanate compound and the hydroxyl functional groups in the substrate so as to form a chemical bond between the isocyanate compound and the hydroxyl functional groups.
A building material assembly comprising:
- a substrate having an exterior surface;
- a fluorohydrocarbon film having a bonding surface;
- and
- a first layer of adhesive positioned between the exterior surface of the substrate and the bonding surface of the fluorohydrocarbon film so as to form a bond therebetween, wherein the adhesive comprises an isocyanate compound, a polyol containing hydroxyl functional groups, a catalyst wherein the catalyst catalyzes a reaction between the isocyanate compound and hydroxyl functional groups so as to form a polyurethane based polymer wherein the polymer physically interlocks and bonds with the film and the substrate without requiring treatment of the bonding surface of the film.
Dependencies are inferred from the claim text.