Decorative laminate
The invention relates to a decorative laminate comprising a core impregnated with a phenolic resin, coated on at least one of the faces thereof with a sheet impregnated with a mixture comprising an alkylated melamine resin and an acrylic polyol resin. The invention also relates to a process for preparing such a laminate and the use thereof as coating material.
1. A decorative laminate formed under heat and pressure, the decorative laminate comprising:
a core impregnated with a phenolic resin, and
a sheet comprised of a plain paper or a paper bearing a transferred decoration, the sheet being impregnated with a mixture comprising an alkylated melamine resin and an acrylic polyol resin in the absence of isocyantes wherein the alkylated melamine resin is crosslinked by way of the acrylic polyol, the sheet impregnated with the mixture comprising the alkylated melamine resin and the acrylic polyol resin being positioned adjacent at least one face of the core.
2. The decorative laminate as claimed in claim 1 , in which the weight ratio between the alkylated melamine resin and the acrylic polyol resin in the mixture is from about 1 to about 5.
3. The decorative laminate as claimed in claim 1 , in which the mixture of alkylated melamine resin and acrylic polyol resin has a viscosity, measured at 23° C. according to standard ISO 3219, ranging from about 50 to about 500 mPa·s.
4. The decorative laminate as claimed in claim 1 , in which the mixture also comprises up to about 5% by weight, relative to the total weight of the mixture, of one or more additives chosen from LTV stabilizers, antioxidants and surfactants.
5. The decorative laminate as claimed in claim 1 , in which the sheet has a grammage of about 200 to about 450 g/m 2 .
6. The decorative laminate as claimed in claim 1 , in which the core represents at least 90% by weight of the total weight of the laminate.
7. The decorative laminate as claimed in claim 1 , in which the core is coated on one face thereof with the sheet.
8. The decorative laminate as claimed in claim 1 , in which the core is coated on each of the faces thereof with the sheet.
9. The decorative laminate as claimed in claim 1 , in which a sheet impregnated with melamine resin is positioned on the at least one face of the core, the sheet impregnated with melamine resin in turn being positioned on the sheet impregnated with a mixture comprising an alkylated melamine resin and an acrylic polyol resin.
10. The decorative laminate as claimed in claim 1 , in which the sheet impregnated with a mixture comprising an alkylated melamine resin and an acrylic polyol resin is a decorative paper.
11. The decorative laminate as claimed in claim 1 , in which the sheet impregnated with a mixture comprising an alkylated melamine resin and an acrylic polyol resin is a transparent paper.
12. The decorative laminate as claimed in claim 1 , in which the core is not impregnated with a resin other than the phenolic resin.
13. The decorative laminate as claimed in claim 1 , in which the mixture impregnating the sheet does not contain resins other than the alkylated melamine resin and the acrylic polyol resin.