Laminated board for exterior cladding

• US 20040137255A1
• Filed: 07/08/2003
• Published: 07/15/2004
• Est. Priority Date: 01/24/2003
• Status: Active Grant

• Current Assignee: Maderas Mejoradas Industrial S.A.
• Original Assignee: Composites Gurea SA
• Inventors: Sagarzazu, Santiago Bastida, Martinez, Fernando Encio
• Granted Patent: US 7,229,698 B2
• Time in Patent Office: Days
• US Class Current: 428/537.5
• CPC Class Codes: B32B 21/08 of synthetic resin
• CPC Class Codes: B32B 27/04 as impregnant, bonding, or embedding substance not used
• CPC Class Codes: B32B 27/10 of paper or cardboard
• CPC Class Codes: B32B 27/30 comprising vinyl (co)polymers; comprising acrylic (co)polymers
• CPC Class Codes: B32B 7/10 at least one layer having inter-reactive properties
• CPC Class Codes: Y10T 428/31855 Of addition polymer from unsaturated monomers
• CPC Class Codes: Y10T 428/31866 Impregnated or coated cellulosic material
• CPC Class Codes: Y10T 428/31873 Urea or modified urea-aldehyde
• CPC Class Codes: Y10T 428/3188 Next to cellulosic
• CPC Class Codes: Y10T 428/31949 Next to cellulosic
• CPC Class Codes: Y10T 428/31971 Of carbohydrate
• CPC Class Codes: Y10T 428/31989 Of wood
• CPC Class Codes: Y10T 428/31993 Of paper
• CPC Class Codes: Y10T 442/30 Woven fabric [i.e., woven strand or strip material]

Abstract

Laminated board for exterior cladding formed from a core (13) of kraft paper impregnated with phenolic resin, at least one layer of natural wood (14) and at least one surface covering layer (15) including a coating film (17) and a substrate film (16). The coating film (17) is a single-layer film based on polymethyl methacrylate (PMMA), a two-layer film with its lower layer based on polymethyl methacrylate and its upper layer based on polyvinylidine fluoride (PVDF), or a PMMA/PVDF single-layer film. The substrate film (16) consists of a paper impregnated with a compound formed from 80-95% by weight of a phenolic resin and 5-20% by weight of a polymer promoting adhesion of the coating film (17), such as an acrylic, melamine or urea polymer or a combination thereof.

Claims

1. Laminated board (11) for exterior cladding comprising a core (13) of kraft paper impregnated with phenolic resin, at least one layer of natural wood (14) and at least one surface covering layer (15) which includes a coating film (17) and a substrate film (16), characterized in that:

a) the coating film (17) is a film with at least one layer of polymethylmethacrylate (PMMA) either pure or modified through the addition of other polymers,

b) the substrate film (16) is a paper impregnated with a compound formed from a phenolic resin in a proportion of between 95 and 80% by weight and a polymer promoting adhesion of the said coating film (17) in a proportion of between 5 and 20% by weight.

2. Laminated board (11) according to claim 1, characterized in that the adhesion-promoting polymer is an acrylic polymer.

3. Laminated board (11) according to claim 1, characterized in that the adhesion-promoting polymer is a melamine polymer.

4. Laminated board (11) according to claim 1, characterized in that the adhesion-promoting polymer is a urea polymer.

5. Laminated board (11) according to claim 1, characterized in that the adhesion-promoting polymer is a combination of an acrylic polymer and/or a melamine polymer and/or a urea polymer.

6. Laminated board (11) according to any one of claims 1 to 5, characterized in that the coating film (17) is a single-layer film based on polymethyl methacrylate (PMMA) modified with polyvinylidine fluoride (PVDF).

7. Laminated board (11) according to any one of claims 1 to 5, characterized in that the coating film (17) is a two-layer film with an upper layer based on polyvinylidine fluoride (PVDF).