US5296450A
Expired / Lapsed
US
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Water dispersible granular herbicidal compositions comprising dinitroaniline herbicides, montmorillonite carrier, and a base
Assignee: BASF SE
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Filing: 1992-12-23
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Granted: 1994-03-22
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Expires: 2012-12-23
Abstract
Abstract The present invention relates to water dispersible granular compositions comprising a dinitroaniline herbicide and a dispersion enhancing agent and to a process for the preparation of said compositions. Such compositions are storage stable and contain desirable dispersion properties.
Inventors
- 👤 Joseph Kimler
- 👤 Robert Kubisch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:55
CPC Classifications
A; A01; A01N; A01N25/00; A01N25/12; A01N25/14; A01N33/00; A01N33/16; A01N33/18
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
63 words
A water dispersible granular composition comprising on a weight to weight basis about 20% to 90% of a dinitroaniline herbicide; about 5% to 25% of a montmorillonite carrier; about 1.0% to 7.5% of a wetting agent; about 2% to 10% of a suspension agent; and about 0.5% to 20% of a base selected from the group consisting of amines and alkali metal hydroxides.
Claim 2
Dependent Claim
63 words
A water dispersible granular composition comprising on a weight to weight basis about 20% to 90% of a dinitroaniline herbicide; about 5% to 25% of a montmorillonite carrier; about 1.0% to 7.5% of a wetting agent; about 2% to 10% of a suspension agent; and about 0.5% to 20% of a base selected from the group consisting of amines and alkali metal hydroxides.
Claim 3
Dependent Claim
26 words
The water dispersible granular composition according to claim 1 wherein the base is selected from the group consisting of sodium hydroxide, potassium hydroxide, and isopropyl amine.
Claim 4
Dependent Claim
15 words
The water dispersible granular composition according to claim 2 wherein the base is sodium hydroxide.
Claim 5
Dependent Claim
32 words
The water dispersible granular composition according to claim 1, further comprising up to about 1% by weight of an antifoaming agent and up to about 7.5% by weight of a flow agent.
Claim 6
Dependent Claim
27 words
The water dispersible granular composition according to claim 1 wherein the dinitroaniline herbicide is selected from the group consisting of pendimethalin, trifluralin, isopropalin, ethalfluralin, benfluralin and oryzalin.
Claim 7
Dependent Claim
19 words
The water dispersible granular composition according to claim 5 wherein the dinitroaniline herbicide is selected from pendimethalin and trifluralin.
Claim 8
Dependent Claim
24 words
The water dispersible granular composition according to claim 1 comprising on a weight to weight basis about 30% to 70% of a dinitroaniline herbicide.
Claim 9
Dependent Claim
26 words
The water dispersible granular composition according to claim 1 wherein the carrier is selected form the group consisting of beidellite, bentonite, nortronite, saponite, and mixtures thereof.
Claim 10
Dependent Claim
14 words
The water dispersible granular compositions according to claim 8 wherein the carrier comprises bentonite.
Claim 11
Independent Claim
141 words
A method for the production of a dinitroaniline-containing water dispersible granular composition comprising the steps of: (a) milling about 20% to 90% by weight of a dinitroaniline herbicide; (b) blending the milled dinitroaniline herbicide with about 1% to 7.5% by weight of one or more wetting agents, about 2% to 10% by weight of one or more suspension agents and about 5% to 25% by weight of one or more montmorillonite carriers; (c) milling the blend produced by step (b) in the presence of an unreactive refrigerant sufficient to cool the mill; (d) mixing about 0.5% to 20% by weight of one or more bases selected from the group consisting of amines and alkali metal hydroxides with water and the milled blend produced by step (c); (e) extruding the milled blend into granular compositions; and (f) drying the extruded granular compositions.
Claim 12
Independent Claim
141 words
A method for the production of a dinitroaniline-containing water dispersible granular composition comprising the steps of: (a) milling about 20% to 90% by weight of a dinitroaniline herbicide; (b) blending the milled dinitroaniline herbicide with about 1% to 7.5% by weight of one or more wetting agents, about 2% to 10% by weight of one or more suspension agents and about 5% to 25% by weight of one or more montmorillonite carriers; (c) milling the blend produced by step (b) in the presence of an unreactive refrigerant sufficient to cool the mill; (d) mixing about 0.5% to 20% by weight of one or more bases selected from the group consisting of amines and alkali metal hydroxides with water and the milled blend produced by step (c); (e) extruding the milled blend into granular compositions; and (f) drying the extruded granular compositions.
Claim 13
Dependent Claim
24 words
The method according to claim 10 wherein the dinitroaniline herbicide is selected from the group consisting of pendimethalin, trifluralin, isopropalin, ethalfluraline, benfluralin and oryzalin.
Claim 14
Dependent Claim
16 words
The method according to claim 10 wherein the dinitroaniline herbicide is selected from pendimethalin and trifluralin.
Claim 15
Dependent Claim
39 words
The method according to claim 10 wherein step (b) further comprises the addition of up to about 1% by weight of one or more antifoaming agents and up to about 7.5% by weight of one or more flow agents.
Claim 16
Dependent Claim
23 words
The method according to claim 10 wherein the base is selected from the group consisting of sodium hydroxide, potassium hydroxide and isopropyl amine.
Claim 17
Dependent Claim
12 words
The method according to claim 14 wherein the base is sodium hydroxide.
Claim 18
Dependent Claim
25 words
The method according to claim 10 wherein the granular compositions produced by step (c) are dried until the residual moisture is reduced to about 1%-3%.
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