Manufactured granular substrate and method for producing the same
AssigneesThe National Lime and Stone Company, The Andersons Agriservices, Inc.
InventorsJames W. Welshimer, Nadine C. Dunn, Timothy D. Birthisel
Life of this patent
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Abstract
A manufactured granular substrate composition suitable for use as a carrier for active chemical agents. The composition includes one or more mineral components having a bulk density greater than about 70 pounds per cubic foot. The composition also contains about one or more light weight additives and one or more water soluble binders. The resulting manufactured granular substrate has a bulk density of less than about 55 pounds per cubic foot with a size guide number of about 75 to about 300.
Claims18
A manufactured granular substrate suitable for use as a carrier for chemical agents, comprising:
- (a) one or more mineral components, the one or more mineral components having a bulk density of greater than about 70 pounds per cubic foot and a sizing of about 100% passing through a 30 mesh screen and about 50% or more passing through a 200 mesh screen;
- (b) one or more light weight additives, each additive having a bulk density of less than 35 pounds per cubic foot and a sizing of at least 20% passing through a 40 mesh screen;
- and
- (c) one or more water soluble binders;
- the granular substrate having a bulk density of less than about 40 pounds per cubic foot.
A method of producing light weight granular substrates, comprising:
- (a) mixing one or more mineral components, the one or more mineral components having a bulk density greater than about 70 pounds per cubic foot and a sizing of about 100% passing through a 30 mesh screen and about 50% or more passing through a 200 mesh screen, one or more light weight additives, each additive having a bulk density of less than 35 pounds per cubic foot and a sizing of at least 20% passing through a 40 mesh screen, and one or more water soluble binders to form a granular substrate admixture;
- (b) pelletizing said admixture to form granular substrates;
- and
- (c) drying said granular substrates at a temperature sufficient to remove excess moisture and produce finished granular substrates having a bulk density of less than about 55 pounds per cubic foot.
Dependencies are inferred from the claim text.