Process for Producing a Powder Comprising an Extruded Carrier With an Active Compound
First Claim
Patent Images
1. A process comprising:
- (i) heating at least one active compound to at least its melting point or softening point; and
(ii) in a single screw extruder or a twin-screw extruder, combining at least the at least one active compound with at least one carrier, to form combined ingredients, and cooling the combined ingredients as they pass through the extruder, such that the combined ingredients exit the extruder at about ambient temperature in the form of a powder having particles sized so that about 95 wt % or more of the powder passes through a screen of about 8 standard U.S. mesh.
0 Assignments
0 Petitions
Accused Products
Abstract
This invention provides processes for forming powders comprising at least one active compound and at least one carrier. The processes comprise (i) heating at least one active compound to at least its melting point or softening point; and (ii) in an extruder, combining at least the at least one active compound with at least one carrier, to form combined ingredients, and cooling the combined ingredients as they pass through the extruder, such that the combined ingredients exit the extruder at about ambient temperature in the form of a powder having particles sized so that about 95 wt % or more of the powder passes through a screen of about 8 standard U.S. mesh.
-
Citations
29 Claims
-
1. A process comprising:
-
(i) heating at least one active compound to at least its melting point or softening point; and (ii) in a single screw extruder or a twin-screw extruder, combining at least the at least one active compound with at least one carrier, to form combined ingredients, and cooling the combined ingredients as they pass through the extruder, such that the combined ingredients exit the extruder at about ambient temperature in the form of a powder having particles sized so that about 95 wt % or more of the powder passes through a screen of about 8 standard U.S. mesh. - View Dependent Claims (2, 3, 4, 5, 6, 8, 9, 10, 11, 13)
-
-
7. (canceled)
-
12. (canceled)
-
14. (canceled)
-
15. A process comprising:
-
(i) heating N-(n-butyl)thiophosphoric triamide to at least its melting point or softening point; and (ii) in a single screw extruder or a twin-screw extruder, deaerating at least one solid urea-formaldehyde polymer, combining the N-(n-butyl)thiophosphoric triamide with the deaerated urea-formaldehyde polymer to form combined ingredients, and cooling the combined ingredients as they pass through the extruder such that the combined ingredients exit the extruder at about ambient temperature in the form of a powder. - View Dependent Claims (17, 18, 19, 21, 22)
-
-
16. (canceled)
-
20. (canceled)
-
23. (canceled)
- 24. A powder comprising at least one active compound and at least one carrier, where the powder has particles sized so that about 95 wt % or more of the powder passes through a screen of about 10 standard U.S. mesh.
-
26. (canceled)
-
28. (canceled)
Specification