Curable two-part coatings for conductors
View Patent ↗A compositional kit for forming a composition includes a first composition and a second composition which are separate. The first composition includes a filler, a cross-linking agent and an emissivity agent; and the second composition includes a silicate binder. Methods for making a compositional kit and for making a coated overhead conductor are also provided.
1. A method of making a compositional kit to form a curable coating composition, the method comprising:
a. mixing a first composition, the first composition comprising from about 2% to about 55% of a filler, by dry weight of the compositional kit, about 5% to about 20% of a cross-linking agent, by dry weight of the compositional kit, and about 6% to about 42% of an emissivity agent, by dry weight of the compositional kit; and
b. mixing a second composition, the second composition comprising about 20% to about 65%, by dry weight of the compositional kit, of a metal silicate binder, wherein the metal of the metal silicate binder is one of an alkali earth metal or an alkaline earth metal; and
wherein the first composition and the second composition are separated; and
wherein
i) the filler comprises about 1% to about 18% talc, about 1% to about 15% calcined kaolin, about 0% to about 10% aluminum oxide, and about 0% to about 12% quartz;
ii) the crosslinking agent comprises about 5% to about 20% of one or more of magnesium hydroxide and magnesium oxide;
iii) the emissivity agent comprises about 1% to about 12% of one or more of boron oxide, silicon carbide, and cerium oxide; and about 5% to about 30% titanium dioxide; and
iv) the metal silicate binder comprises about 20% to about 65% potassium silicate.
2. The method of claim 1 , wherein the filler has an average particle size of about 50 microns or less.
3. The method of claim 1 , wherein the crosslinking agent further comprises zinc oxide.
4. The method of claim 1 , wherein the emissivity agent further comprises one or more of gallium oxide, zirconium oxide, silicon hexaboride, carbon tetraboride, silicon tetraboride, molybdenum disilicide, tungsten disilicide, zirconium diboride, zinc oxide, cupric chromite, silicon dioxide, manganese oxide, chromium oxide, iron oxide, boron carbide, boron silicide, copper chromium oxide, aluminum nitride, boron nitride, alumina, and magnesium oxide.
5. The method of claim 1 , wherein the metal silicate binder further comprises one or more of sodium silicate, lithium silicate, calcium silicate, and magnesium aluminum silicate.
6. The method of claim 1 , wherein at least one of the first composition and the second composition further comprises one or more of a stabilizer, an emulsifier, and a defoamer.
7. The method of claim 1 , further comprising the addition of water to at least one of the first composition and the second composition and mixing the water to form a wet admixture.
8. The method of claim 7 , wherein water is added to the first composition and the second composition and wherein the first composition has a total solids content range of about 30% to about 55% and the second composition has a total solids content range of about 20% to about 50%.
9. The method of claim 1 , further comprising:
mixing the first composition and the second composition together to form the curable coating composition;
applying the curable coating composition to a substrate to form a coated surface; and
drying the curable coating composition with heat.
10. The method of claim 1 , wherein the filler further comprises one or more of mica, wollastonite, calcite, zirconia, zircon, micaceous iron oxide, iron oxide, aluminum silicates, barium sulphate, and lithopone.