초록 ▼

Free-flowing moisture resistant calcium-containing particles that inhibit the water absorption characteristics of calcium products, including soluble calcium products that are hygroscopic and deliquescent, by providing a moisture resistant coating. The core of the particle is a calcium-containing ma

Free-flowing moisture resistant calcium-containing particles that inhibit the water absorption characteristics of calcium products, including soluble calcium products that are hygroscopic and deliquescent, by providing a moisture resistant coating. The core of the particle is a calcium-containing material, more particularly a soluble calcium-containing material. Moisture resistant or hydrophobic coatings are applied to the core to inhibit water absorption by the calcium-containing material. The coated particles may then be more easily shipped, stored and handled as a dry, anhydrous product. A core comprised of calcium chloride coated with urea is useful as both a soil conditioner and a fertilizer. Additional plant nutrients are mixed with either the core or the coating materials to improve fertilizing qualities. Additional coatings of hydrophobic materials such as a paraffinic hydrocarbon or a polymeric resin increase the water resistance of the particles. A final coating of a finely divided conditioning agents such as talc or calcium carbonate can be applied to achieve a more free-flowing particle.

대표청구항 ▼

[ I claim:] [1.] Free-flowing moisture resistant calcium-containing particles comprising: a core comprising a hygroscopic calcium-containing material and an essentially calcium free soluble coating on an outer surface of the core to inhibit moisture uptake by the core. [27.] Free-flowing, urea-coate

[ I claim:] [1.] Free-flowing moisture resistant calcium-containing particles comprising: a core comprising a hygroscopic calcium-containing material and an essentially calcium free soluble coating on an outer surface of the core to inhibit moisture uptake by the core. [27.] Free-flowing, urea-coated calcium chloride particles comprising: a calcium chloride core and a urea coating wherein the urea and the calcium chloride form a urea-calcium chloride adduct layer between the core and the coating. [30.] Free-flowing moisture resistant calcium chloride particles comprising: a calcium chloride core and a soluble nitrogen-containing coating wherein the soluble nitrogen-containing coating is applied to the core in molten form.