Pre-finished and durable building material

• US 20040163331A1
• Filed: 02/03/2004
• Published: 08/26/2004
• Est. Priority Date: 11/19/1999
• Status: Active Grant

• Current Assignee: James Hardie Technology Limited (James Hardie Industries Plc)
• Original Assignee: James Hardie Technology Limited (James Hardie Industries Plc)
• Inventors: Peng, Weiling, Merkley, Donald J., Gleeson, James A.
• Granted Patent: US 7,524,555 B2
• Time in Patent Office: Days
• US Class Current: 52/100
• CPC Class Codes: B32B 13/04 comprising such water setting substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material next to a glass layer B32B17/06
• CPC Class Codes: B32B 13/08 of paper or cardboard
• CPC Class Codes: B32B 13/12 of synthetic resin
• CPC Class Codes: B32B 7/12 using interposed adhesives or interposed materials with bonding properties
• CPC Class Codes: E04C 2/26 composed of materials covered by two or more of groups E04C2/04, E04C2/08, E04C2/10 or of materials covered by one of these groups with a material not specified in one of the groups of cement and mineral fibres E04C2/04
• CPC Class Codes: Y10T 428/249932 Fiber embedded in a layer derived from a water-settable material [e.g., cement, gypsum, etc.]
• CPC Class Codes: Y10T 428/249939 Two or more layers
• CPC Class Codes: Y10T 428/249952 At least one thermosetting synthetic polymeric material layer
• CPC Class Codes: Y10T 428/249994 Composite having a component wherein a constituent is liquid or is contained within preformed walls [e.g., impregnant-filled, previously void containing component, etc.]
• CPC Class Codes: Y10T 428/249998 Indefinite plurality of similar impregnated thin sheets [e.g., "decorative laminate" type, etc.]
• CPC Class Codes: Y10T 428/31866 Impregnated or coated cellulosic material
• CPC Class Codes: Y10T 428/31964 Paper

Abstract

A pre-finished, moisture resistant and durable building material is provided. In one embodiment the building material includes a fiber cement substrate having a first side and a second side, at least one resin impregnated paper over at least one of the first and second sides, and a stress-relieving polymeric film between the fiber cement substrate and the at least one resin impregnated paper, the polymer film acting as a stress relaxer between the fiber cement substrate and the at least one resin impregnated paper. In another embodiment, a stress-relieving polymeric coating or film is provided between resin penetrated sheets and a substrate. In another embodiment, a process for bonding the resin penetrated sheets to the substrate is provided.

Claims

1. A building material, comprising:

a cementitious substrate having a first side and a second side;

at least one resin impregnated paper over at least one of said first and second sides; and

a stress-relieving elastomer between said cementitious substrate and said at least one resin impregnated paper, said elastomer acting as a stress relaxer between said cementitious substrate and said at least one resin impregnated paper.

2. The building material of claim 1, wherein the elastomer is selected from the group consisting of polyurethane, acrylic, acrylic-styrene, polyester, polyether, polyvinyl and their modified films, epoxy, polyamide, polyimide, polysulfide, silicon based polymer and natural polymers.

3. The building material of claim 1, wherein the elastomer is a polymeric film.

4. The building material of claim 1, wherein the elastomer has an elongation between about 20% and 1200%.

5. The building material of claim 4, wherein the elastomer has an elongation between about 100% and 1000%.

6. The building material of claim 1, wherein the elastomer has a modulus of elasticity at 100% elongation of between about 10 and 10,000 psi.

7. The building material of claim 6, wherein the elastomer has a modulus of elasticity at 100% elongation of between about 50 and 8,000 psi.

8. The building material of claim 1, wherein the elastomer has a glass transition temperature between about −

90 and 50°

C.

9. The building material of claim 1, further comprising an adhesive on a surface of the elastomer.

10. The building material of claim 1, wherein the resin impregnated paper includes a cellulose paper penetrated with resin selected from the group consisting of melamine-formaldehyde and phenol-formaldehyde.

11. The building material of claim 1, wherein a resin impregnated paper is laminated to both said first and second sides.

12. The building material of claim 1, comprising at least one layer of phenol-formaldehyde penetrated paper over the first side of the cementitious substrate, and at least one layer of melamine-formaldehyde penetrated paper over the at least one layer of phenol-formaldehyde penetrated paper.

13. The building material of claim 1, wherein the elastomer is an adhesive.

14. The building material of claim 1, wherein the elastomer provides sufficient stress-relief to prevent delamination between the cementitious material and the at least one resin impregnated paper after the laminated structure is incubated at a temperature of about 60°

C. for not less than three days.

15. The building material of claim 1, wherein the elastomer provides sufficient stress-relief to prevent delamination between the cementitious material and the at least one resin impregnated paper after storing said laminated structure in a desiccated environment having a relative humidity of not more than 10% for a period of not less than two days.

16. The building material of claim 1, wherein the elastomer provides sufficient stress-relief to prevent delamination between the cementitious material and the at least one resin impregnated paper after subjecting said laminated structure to at least five serial wet and dry cycles wherein said dry cycle comprises incubating said laminate structure for about twenty-four hours at about 60°

C. and said wet cycle comprises soaking said laminate structure in water for twenty-four hours.