Coating composition, coated article and a method to manufacture the same
View Patent ↗The invention pertains to a coating composition, a coated material formed therewith, and a method for coating the material with the coating composition.
1. A method of coating a web with a coating composition comprising coating the web using a roll dip coater immersed in the coating composition to an arbitrary depth, wherein:
said depth does not exceed the tangential point where the substrate leaves the roller;
only one side of the web is coated; and
the coating composition has an absolute viscosity of 6000 to 30000 mPas and comprises:
two or more pigments;
an organic binder;
at least one thickener;
55-70% by weight solids; and
a phyllosilicate or a phyllosilicate-comprising clay as a first pigment and an inosilicate or an inosilicate-comprising pigment as a second pigment.
2. The method according to claim 1 , wherein a tension of 40 to 150 N/m holds the web against the roller.
3. The method according to claim 1 , further comprising adjusting the amount of coating composition on the web with a doctor knife or an air-knife.
4. The method according to claim 3 , wherein said doctor knife or air knife is angled upward at an acute angle of 15-75° with respect to the moving web.
5. The method according to claim 3 , wherein said doctor knife or air knife causes a deflection of 0.5 to 2 cm between a deflected path of the web at the doctor knife or air knife and the natural path of the web.
6. A method of coating a web with a coating composition comprising coating the web using a roll dip coater immersed in the coating composition to an arbitrary depth, wherein:
said depth does not exceed the tangential point where the substrate leaves the roller;
only one side of the web is coated; and
the coating composition has an absolute viscosity of 6000 to 30000 mPas and comprises:
at least one pigment;
at least one organic binder;
at least one thickener;
55-70% by weight, solids; and
a styrene-polyacrylate binder, diiodomethyl p-tolyl sulfone, brown tint, a sodium polyacrylate disperant, wollastonite, kaolinite or a kaolinite-comprising clay and an acrylic alkali soluble emulsion.
7. The method according to claim 6 , wherein a tension of 40 to 150 N/m holds the web against the roller.
8. The method according to claim 6 , further comprising adjusting the amount of coating composition on the web with a doctor knife or an air-knife.
9. The method according to claim 8 , wherein said doctor knife or air knife is angled upward at an acute angle of 15-75° with respect to the moving web.
10. The method according to claim 8 , wherein said doctor knife or air knife causes a deflection of 0.5 to 2 cm between a deflected path of the web at the doctor knife or air knife and the natural path of the web.
11. A method of coating a web with a coating composition comprising coating the web using a roll dip coater immersed in the coating composition to an arbitrary depth, wherein:
said depth does not exceed the tangential point where the substrate leaves the roller;
only one side of the web is coated; and
the coating composition has an absolute viscosity of 6000 to 30000 mPas and comprises:
at least one pigment;
at least one organic binder;
at least one thickener; and
55-70% by weight, solids; and
a styrene-polyacrylate binder, a hydrophilic clay gellant, diiodomethyl p-tolyl sulfone, a sodium polyacrylate disperant, wollastonite, talc and an acrylic alkali soluble emulsion.
12. The method according to claim 11 , wherein a tension of 40 to 150 N/m holds the web against the roller.
13. The method according to claim 11 , further comprising adjusting the amount of coating composition on the web with a doctor knife or an air-knife.
14. The method according to claim 13 , wherein said doctor knife or air knife is angled upward at an acute angle of 15-75° with respect to the moving web.
15. The method according to claim 13 , wherein said doctor knife or air knife causes a deflection of 0.5 to 2 cm between a deflected path of the web at the doctor knife or air knife and the natural path of the web.
16. A method of coating a web with a coating composition comprising coating the web using a roll dip coater immersed in the coating composition to an arbitrary depth, wherein:
said depth does not exceed the tangential point where the substrate leaves the roller;
only one side of the web is coated; and
the coating composition has an absolute viscosity of 6000 to 30000 mPas and comprises:
at least one pigment;
at least one organic binder;
at least one thickener;
55-70% by weight, solids; and kaolinite or a kaolinite-comprising clay and wollastonite as first and second pigments, polyurethane as a thickener, a styrene-polyacrylate emulsion as a binder and diiodomethyl p-tolyl sulfone, a sodium salt of a polyacrylate, ink oxide and carbon black as additives.
17. The method according to claim 16 , wherein a tension of 40 to 150 N/m holds the web against the roller.
18. The method according to claim 16 , further comprising adjusting the amount of coating composition on the web with a doctor knife or an air-knife.
19. The method according to claim 18 , wherein said doctor knife or air knife is angled upward at an acute angle of 15-75° with respect to the moving web.
20. The method according to claim 18 , wherein said doctor knife or air knife causes a deflection of 0.5 to 2 cm between a deflected path of the web at the doctor knife or air knife and the natural path of the web.