Coating composition
Described herein is a building panel comprising a body having a first major surface opposite a second major surface and a side surface extending therebetween, a coating applied to at least one of the first major surface, the second major surface, or the side surface, the coating comprising a binder, and a pigment composition comprising titanium dioxide, an alkali metal silicate, and a clay; wherein the titanium dioxide is present in an amount ranging from about 3.0 wt. % to about 15.0 wt. % based on the total weight of the pigment composition.
1. A coating composition comprising:
a liquid carrier;
a binder; and
a pigment composition comprising
titanium dioxide;
an alkali metal silicate; and
a clay;
wherein the titanium dioxide is present in an amount ranging from about 2.0 wt. % to about 12.0 wt. % based on the total weight of the pigment composition,
wherein the alkali metal silicate comprises sodium aluminum silicate and is present in an amount ranging from about 0.3 wt. % to about 3.0 wt. % based on the total weight of the pigment composition, and
wherein the liquid carrier comprises water.
2. The coating composition according to claim 1 , wherein the pigment composition further comprises calcium carbonate, magnesium carbonate, or a combination thereof.
3. The coating composition according to claim 2 , wherein the calcium carbonate is present in an amount ranging from about 45.0 wt. % to about 70.0 wt. % based on the total weight of the pigment composition.
4. The coating composition according to claim 1 , wherein the clay comprises calcined kaolin, and wherein the calcined kaolin is present in an amount ranging from about 10.0 wt. % to about 30.0 wt. % based on the total weight of the pigment composition.
5. The coating composition according to claim 1 , wherein the binder is a vinyl acetate polymer, and wherein the vinyl acetate polymer is present in an amount ranging from about 2.0 wt. % to about 8.0 wt. % based on the total weight of the coating composition.
6. The coating composition according to claim 1 , wherein the coating composition has a solids content ranging from about 50.0 wt. % to about 85.0 wt. %.
7. The coating composition according to claim 1 , wherein the pigment composition is present in an amount ranging from about 55.0 wt. % to about 80.0 wt. % based on the total weight of the coating composition.
8. The coating composition according to claim 1 , wherein an alkali moiety of the alkali metal silicate comprises at least one of sodium, potassium, or lithium.
9. A coating composition comprising:
a liquid carrier;
a binder; and
a pigment composition comprising:
titanium dioxide;
an alkali metal silicate;
calcium carbonate;
magnesium carbonate; and
calcined kaolin;
wherein the titanium dioxide is present in an amount ranging from about 2.0 wt. % to about 12.0 wt. % based on the total weight of the pigment composition; and
wherein the calcium carbonate and the magnesium carbonate are present in a weight ratio ranging from about 3:1 to about 6:1.
10. The coating composition according to claim 9 , wherein the calcium carbonate and the magnesium carbonate are present in a weight ratio ranging from about 4:1 to about 5:1.
11. The coating composition according to claim 9 , wherein the magnesium carbonate is present in an amount ranging from about 8.0 wt. % to about 20.0 wt. %, based on the total weight of the pigment composition.
12. The coating composition according to claim 9 , wherein the calcium carbonate has an average particle size ranging from about 0.5 μm to about 40 μm.
13. The coating composition according to claim 9 , wherein the calcined kaolin is present in an amount ranging from about 10.0 wt. % to about 30.0 wt. % based on the total weight of the pigment composition.
14. The coating composition according to claim 9 , wherein the alkali metal silicate is an alkali metal aluminum silicate.
15. The coating composition according to claim 9 , wherein the alkali metal silicate is present in an amount ranging from about 0.3 wt. % to about 3.0 wt. % based on the total weight of the pigment composition.
16. The coating composition according to claim 9 , wherein the coating composition has a pH from about 7.0 to about 9.0.
17. The coating composition according to claim 9 , wherein the binder is selected from starch-based polymer, polyvinyl alcohol (PVOH), a latex, polysaccharide polymers, cellulosic polymers, protein solution polymers, an acrylic polymer, polymaleic anhydride, epoxy resins, and a combination of two or more thereof.