# US 2016/0353731 A1 · Stable solid herbicide delivery systems

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- Number: US 2016/0353731 A1
- Document ID: US20160353731A1
- Status: Published application
- Kind: A1
- Application number: 15/117,768
- Filed: 2015-02-09
- Published: 2016-12-08
- Earliest claimed: 2014-02-10
- Assignees: Dow AgroSciences LLC
- Applicants: Dow Agrosciences LLC
- Inventors: Robert Buttimor
- Web page: https://patentgrep.com/patent/US20160353731A1

## CPC

- A01N 25/08: containing solids as carriers or diluents
- A01N 25/12: Powders or granules (A01N25/26 takes precedence)
- A01N 25/26: in coated particulate form
- A01N 43/40: six-membered rings
- A01N: PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF (preservation of food or foodstuff A23); BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES (preparations for medical, dental or toiletry purposes which kill or prevent the growth or proliferation of unwanted organisms A61K); PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS

## Abstract

Herbicide delivery systems comprising a potassium salt of a herbicidal carboxylic acid coated onto a solid carrier.

## Claims

### Claim 1

A herbicide delivery system comprising a solid carrier and a potassium salt of a herbicidal carboxylic acid coated onto the surface of the solid carrier, wherein the potassium salt of the herbicidal carboxylic acid is from about 0.1 gram acid equivalent per kilogram (g ae/kg) to about 100 g ae/kg of the total herbicide delivery system and the coated solid carrier is free flowing and does not cake during storage.

### Claim 2 (depends on 1)

The herbicide delivery system of claim 1, wherein the herbicidal carboxylic acid is picloram.

### Claim 3 (depends on 1, 2)

The herbicide delivery system of any of claims 1-2, further comprising a second herbicidal carboxylic acid.

### Claim 4 (depends on 3)

The herbicide delivery system of claim 3, wherein the second herbicidal carboxylic acid is aminopyralid.

### Claim 5 (depends on 1, 2, 3, 4)

The herbicide delivery system of any of claims 1-4, wherein the herbicide delivery system is a granule or a pellet.

### Claim 6 (depends on 1, 2, 3, 4, 5)

The herbicide delivery system of any of claims 1-5, further comprising one or more inert ingredients.

### Claim 7 (depends on 1, 2, 3, 4, 5, 6)

The herbicide delivery system of any of claims 1-6, further comprising a surfactant.

### Claim 8 (depends on 1, 2, 3, 4, 5, 6, 7)

The herbicide delivery system of any of claims 1-7, wherein the solid carrier is limestone chips.

### Claim 9 (depends on 1, 2, 3, 4, 5, 6, 7, 8)

The herbicide delivery system of any of claims 1-8, wherein the herbicidal carboxylic acid is a compound of the formula
wherein Ar is a phenyl, pyridine, pyrimidine or quinoline group substituted with one or more substituents selected from halogen, C1-C6 alkyl, C1-C6 haloalkyl, C1-C6 alkoxy, amino, C1-C6 alkylamino, and di(C1-C6 alkyl)amino.

### Claim 10 (depends on 1, 2, 3, 4, 5, 6, 7, 8)

The herbicide delivery system of any of claims 1-8, wherein the herbicidal carboxylic acid is aminopyralid, aminocyclopyrachlor, clopyralid, dicamba, or picloram, and mixtures thereof.

### Claim 11 (depends on 1, 2, 3, 4, 5, 6, 7, 8, 9, 10)

The herbicide delivery system of any of claims 1-10, wherein the weight ratio of the solid carrier to the herbicidal carboxylic acid, on an acid equivalent basis, ranges from about 1000:1 to about 10:1.

### Claim 12 (depends on 1, 2, 3, 4, 5, 6, 7, 8, 9, 10)

The herbicide delivery system of any of claims 1-10, wherein the weight ratio of the solid carrier to the herbicidal carboxylic acid, on an acid equivalent basis, ranges from about 55:1 to about 40:1.

### Claim 13

A herbicide delivery system comprising:
a solid carrier comprising from about 925 g/kg to about 975 g/kg of a solid carrier comprising limestone chips, the limestone chips having a hard inert surface, an irregular shape; and
a mixture of herbicidal carboxylic acids comprising from about 10 g ae/kg to 30 g ae/kg of a picloram potassium salt and from about 0.1 g ae/kg to 1 g ae/kg of an aminopyralid potassium salt,
wherein the mixture of herbicidal carboxylic acids is coated onto the surface of the solid carrier and the coated solid carrier is free flowing and does not cake during storage.

### Claim 14 (depends on 13)

The herbicide delivery system of claim 13, wherein greater than about 80% of the chips having a particle size within a range from about 400 microns (μm) to about 1200 μm.

### Claim 15 (depends on 1)

A method of preparing the herbicide delivery system of claim 1 comprising:
(a) preparing an aqueous solution of the potassium salt of the herbicidal carboxylic acid;
(b) spraying the aqueous solution of the potassium salt of the herbicidal carboxylic acid onto a granular solid carrier; and
(c) drying the resulting sprayed granular solid carrier to provide the herbicide delivery system as non-sticky, free-flowing granules.