FLUORINE-FREE COATING COMPOSITION

Abstract

The use is described of a fluorine-free coating composition which comprises at least one polycarbodiimide compound, the at least one polycarbodiimide compound having at least two hydrocarbon groups each having at least 4 carbon atoms, for impregnating floor coverings. Carpets are not included. Also presented are a fluorine-free coating composition and a floor covering coated with this composition.

Claims

1.-11. (canceled)

12. A use of a fluorine-free coating composition comprising: a. at least one polycarbodiimide compound, for impregnating floor coverings, not including carpets.

13. The use according to claim 12, wherein the coating composition comprises: b. at least one paraffin wax.

14. The use according to claim 13, wherein the mass ratio of paraffin wax to polycarbodiimide is 3:7 to 7:3.

15. The use according to claim 12, wherein the coating composition further comprises: c. at least one polymer selected from alkyd resins, acrylate resins, polyurethane-modified polyesters, silanes, siloxanes or mixtures thereof.

16. The use according to claim 15, wherein the coating composition comprises: b. at least one paraffin wax, and wherein the mass ratio of (a+b):c is 10:90 to 90:10.

17. The use according to claim 12, wherein the coating composition further comprises: d. at least one solvent.

18. The use according to claim 17, wherein said at least one solvent comprises water.

19. The use according to claim 12, wherein the at least one polycarbodiimide compound has at least two hydrocarbon groups which each have at least 4 carbon atoms.

20. The use according to claim 19, wherein the coating composition further comprises: c. at least one polymer selected from alkyd resins, acrylate resins, polyurethane-modified polyesters, silanes, siloxanes or mixtures thereof.

21. A fluorine-free coating composition comprising: a. at least one polymer selected from alkyd resins, acrylate resins, polyurethane-modified polyesters, silanes, siloxanes or mixtures thereof.

22. The fluorine-free coating composition according to claim 21, wherein the composition comprises: b. at least one polycarbodiimide compound, the at least one polycarbodiimide compound having at least two hydrocarbon groups each having at least 4 carbon atoms.

23. The fluorine-free coating composition according to claim 21, wherein the composition comprises at least one paraffin wax.

24. The fluorine-free coating composition according to claim 21, wherein at least one solvent is present.

25. The fluorine-free coating composition according to claim 22, wherein at least one solvent is present.

26. A floor covering coated with a fluorine-free coating composition according to claim 21.

Description

EXAMPLES

[0036] Uncoated MDF/HDF laminate boards were coated with coating compositions. To determine the quality of impregnation here, the contact angle and also the swelling of the edge were ascertained.

Tests

Contact Angle Measurement

[0037] Edges of unprocessed, uncoated MDF/HDF laminate boards are coated by brush; drying: at least 24 h at RT; via a contact angle instrument (OK 15E10), water droplets (0.2 mL to 0.3 mL) are placed onto the edge; contact angle measurement [0038] <90: hydrophilic [0039] >90 to 130: hydrophobic [0040] >130: superhydrophobic

Edge Swelling

[0041] Drying times: at least 24 h at RT

[0042] Unprocessed, uncoated MDF/HDF laminate boards, in each case with tongue or groove, 715 cm, have their edge thicknesses measured with a thickness gauge at various points; the boards are then coated by brush; application rates are ascertained via re-weighing, and the application rate is calculated and ascertained as g/m.sup.2 (around 2 to 5 g/m.sup.2); laminate is clicked together under tension via tongue/groove, and the joints clicked together are wetted with a wet cloth at pre-defined weight; viewing tests and thickness measurement after 12 h by means of inspection [0043] 1. very severe swelling [0044] 2. severe swelling [0045] 3. slight swelling [0046] 4. barely visible swelling [0047] 5. no swelling
by means of thickness gauge (Kfer FD50); the thickness ought to be not more than 0.1 mm

EXAMPLES

TABLE-US-00001 TABLE 1 Aqueous coating compositions Comparative Example 1 Example 1 Example 2 Polycarbodiimide compound + 0.25 6 6 paraffin wax Silane 2 5 10 Polyurethane-modified 4 10 20 polyesters Organic solvents Water 91.75 69 54 Additives 2 10 10

TABLE-US-00002 TABLE 2 Determination of the impregnating effect of aqueous coating compositions Comparative Example 1 Example 1 Example 2 Contact angle 85 120 125 Measurement thickness/mm 0.5 0.1 0.1 Visual evaluation 2 5 5

TABLE-US-00003 TABLE 3 Non-aqueous coating compositions Comparative Example 2 Example 3 Example 4 Polycarbodiimide compound + 0.25 5 7.5 paraffin wax Silane 1 5 2.5 Alkyd resin 1.8 9 9 Organic solvents 94.95 76 71 Water Additives 2 5 10

TABLE-US-00004 TABLE 4 Determination of the impregnating effect of non-aqueous coating compositions Comparative Example 2 Example 3 Example 4 Contact angle 70 110 127 Measurement thickness/mm 0.6 0.1 0.1 Visual evaluation 1 4-5 5

[0048] Examples 1 to 4 demonstrate that the coating compositions of the invention at laminate edges exhibit a high hydrophobic, impregnating effect and there are no instance of swelling due to water contact.