# US 6,720,170 B2 · Pesticide microemulsions and dispersant/penetrant formulations

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- Number: US 6,720,170 B2
- Document ID: US6720170B2
- Status: Granted
- Kind: B2
- Application number: 09/826,559
- Filed: 2001-04-04
- Published: 2002-01-24
- Granted: 2004-04-13
- Earliest claimed: 2000-04-04
- Assignees: Abr, LLC
- Inventors: Bryan Hiromoto
- Web page: https://patentgrep.com/patent/US6720170B2

## CPC

- A01N 25/04: Dispersions, {emulsions, suspoemulsions, suspension concentrates} or gels (foams A01N25/16)
- A01N 25/30: characterised by the surfactants
- A01N 43/16: with oxygen as the ring hetero atom
- A01N 61/00: Biocides, pest repellants or attractants, or plant growth regulators containing substances of unknown or undetermined composition, e.g. substances characterised only by the mode of action
- A01N 63/10: Animals; Substances produced thereby or obtained therefrom
- A01N 63/30: Microbial fungi; Substances produced thereby or obtained therefrom
- A01N 63/50: Isolated enzymes; Isolated proteins (peptides A01N37/46)
- 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

A clear aqueous emulsion of a complex comprising a moiety having a hydrophilic core to which is covalently bound the backbone of at least one monounsaturated C16-C20 fatty acid and appropriate surfactants is effective in controlling agricultural pests, including nematodes.

## Claims

### Claim 1

A clear aqueous microemulsion consisting essentially of
(a) a lipase complexed with a least one C16-C20 monounsaturated fatty acid or an ester thereof to form a complex;
(b) an anionic surfactant blend;
(c) a nonionic and/or amphiphilic surfactant blend that promotes microemulsion formation; and
(d) wherein said clear aqueous microemulsion has a turbidity less than 3 NTU.

### Claim 2 (depends on 1)

The microemulsion of claim 1 wherein in said complex
said ester is a monoglyceride, a triglyceride or a diglyceride.

### Claim 3 (depends on 1)

The microemulsion of claim 1 wherein in said complex the monounsaturated C16-C20 fatty acid is an oleic acid.

### Claim 4 (depends on 1)

The microemulsion of claim 1 wherein in said complex said fatty acid or ester is derived from a vegetable oil.

### Claim 5 (depends on 1)

The microemulsion of claim 1 wherein in said complex said lipase is a fungal lipase.

### Claim 6 (depends on 4)

The microemulsion of claim 4 wherein the fungal lipase is derived from a Laetiporus, Ganoderma, Mucor, Rhizopus, Penicillium, Candida or Aspergillus.

### Claim 7 (depends on 6)

The microemulsion of claim 6 wherein said fungal lipase is derived from Laetiporus.

### Claim 8 (depends on 1)

The microemulsion of claim 1 wherein in said complex said lipase is derived from a bacterium.

### Claim 9 (depends on 7)

The microemulsion of claim 7 wherein the lipase is derived from Pseudomonas, Rhizobium or Chromobacterium.

### Claim 10 (depends on 1)

The microemulsion of claim 1 wherein in said complex said lipase is provided in purified form.

### Claim 11 (depends on 5)

The microemulsion of claim 5 wherein the lipase is provided as a fungal culture filtrate.

### Claim 12 (depends on 1)

The microemulsion of claim 1 wherein in said microemulsion at least one surfactant comprises polyalkoxy chains.

### Claim 13 (depends on 12)

The microemulsion of claim 12 wherein said polyalkoxy chains are polyethoxy chains.

### Claim 14 (depends on 1)

The microemulsion of claim 1 which has a turbidity less than 1 NTU.

### Claim 15 (depends on 1)

The microemulsion of claim 1 wherein in said complex the ratio of component (a) to surfactant is about 1:6.5-1:8.5.

### Claim 16 (depends on 15)

The microemulsion of claim 15 wherein the ratio of component (a) to surfactant is 1:7.75.

### Claim 17 (depends on 1)

The microemulsion of claim 1 wherein said ethoxylated linear alcohols of C8-C11 have an alkoxylene:alcohol ratio of 8:1 to 2:1.

### Claim 18 (depends on 17)

The microemulsion of claim 17 wherein said ratio is 2.5:1.