Dispersion for producing abrasion-resistant surfaces

1. A dispersion for manufacturing of a paper impregnated with a resin, comprising the following components in weight percent:

30 to 75% water;

10 to 65% corundum particles with a particle size of F400 to F2000;

0.05 to 5% anionic dispersing agents;

0.05 to 5% of sodium polyacrylate;

0.1 to 5% nonionic tensides; and

0.01 to 2% thickening agents.

2. The dispersion according to claim 1 , wherein the components are in weight percent as follows:

35 to 70% water;

20 to 60% corundum particle with a particle size of F400 to F2000; 0.06 to 4% anionic dispersing agents;

0.06 to 4% sodium polyacrylate;

0.15 to 4% nonionic tensides;

0.02 to 2% thickening agents.

3. The dispersion according to claim 2 , wherein the components are in weight percent as follows:

40-68% water;

30-58% corundum particles with a particle size of F400 to F2000;

0.07 to 3.5% anionic dispersing agents;

0.07 to 3.5% sodium polyacrylate;

0.2 to 3.5% nonionic tensides;

0.03 to 2% thickening agents.

4. The dispersion according to claim 1 , wherein the thickening agents comprise a sheet silicate or a polysaccharide.

5. The dispersion according to claim 1 , wherein the corundum particles are silanized.

6. The dispersion according to claim 1 , wherein the corundum particles have a particle size from F500 to F2000.

7. A method for manufacturing of a laminate material, comprising the steps of:

a) providing a support layer;

b) providing a paper;

c) providing a dispersion according to claim 1 ;

d) introducing the dispersion into a liquid resin mixture, wherein applied on 100 kg resin 0.5 to 7 kg dispersion are introduced on the solid content; thereafter

e) impregnating the paper with the resin dispersion mixture;

f) applying the impregnated paper on the support layer; and

g) curing the impregnated paper on the support layer.

8. The method for manufacturing of a laminate according to claim 7 , wherein the resin is an amino resin.

9. The method for manufacturing of a laminate material according to claim 7 , wherein the curing of the impregnated paper is carried out by heat and/or pressure.

10. The method for manufacturing of a laminate material according to claim 7 , wherein the dispersion is mixed prior to the step d) for at least 10 minutes at a shear rate of at least 10 m/sec.

11. The method for manufacturing of a laminate material according to claim 7 , wherein the support layer consists of wood, a wooden material or a laminate.

12. A laminate material, comprising a support layer of wood, a wooden material or a laminate,

wherein at least on one main side of the support layer a resin-impregnated paper is provided, which comprises

corundum particles with a particle size from F400 to F2000; in which

the laminate comprises a micro scratch-resistance according to EN 16094: 2012-04 of at least MSR-A2, preferably MSR-A1, and a resistance class of at least MSR-B2; and which laminate was obtained by impregnating of the paper with the following method:

a) providing a dispersion according to claim 1 ;

b) introducing the dispersion into a liquid resin mixture, wherein applied on 100 kg resin 0.5 to 6 kg dispersion are introduced on the solid content; and thereafter

c) impregnating the paper with the resin dispersion mixture.

13. The laminate material according to claim 12 , wherein the resin is an amino resin.

14. The laminate material according to claim 12 , wherein the support layer is a plate of MDF or HDF with a plate thickness of 4 to 40 mm.

15. The laminate material according to claim 12 , wherein the resin-impregnated paper comprises a corundum content of 0.3 to 3 g/m 2 .

16. The method for manufacturing of a laminate material according to claim 7 , wherein the dispersion is mixed prior to the step d) for at least 15 m/sec.

17. The dispersion according to claim 1 , wherein the corundum particles have a particle size from F600 to F1000.