Pesticidal compositions

Details Pesticidal compositions Pesticidal compositions

1998-12-22

2001-08-14

Dees, Jose' G. (Department: 1616)

Drug, bio-affecting and body treating compositions

Designated organic active ingredient containing

Phosphorus containing other than solely as part of an...

C424S405000, C504S116100, C514S119000, C514S144000, C514S249000, C514S277000, C514S315000, C514S383000, C514S463000, C514S471000, C514S530000, C514S531000, C514S534000, C514S538000, C514S539000, C514S540000, C514S613000, C514S640000, C514S645000, C514S647000, C514S658000, C514S691000, C514S716000, C514S717000, C514S718000, C514S721000, C514S729000, C514S730000, C514S769000, C514S770000, C514S772000, C514S774000, C514S778000, C514S781000, C514S783000, C514S784000, C514S785000, C514S937000, C514S944000, C514S

Reexamination Certificate

active

06274570

ABSTRACT:

CROSS-REFERENCE TO RELATED APPLICATIONS
Not applicable.
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT
Not applicable.
REFERENCE TO MICROFICHE APPENDIX
Not applicable.
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to storage stable, liquid, pesticidal compositions, the preparation of such compositions and a method of using such compositions to combat pests or as plant growth regulators.
2. Description of the Related Art
Alkylphenol ethoxylates, for example nonylphenol ethoxylates, and alkylbenzene sulfonates and its salts, for example dodecylbenzene sulfonate calcium salt, are commonly used and well known surfactants in water-emulsifiable pesticidal compositions. Some of these surfactants are not entirely satisfactory; in particular with respect to their ecological and toxicological properties. There is still a need for further water-emulsifiable or water soluble, liquid, homogeneous pesticidal compositions which are storage stable, ecological and toxicological favorable and which have good pesticidal efficacy.
Fatty alcohol ethoxylates, e.g. C
10
-C
14
alcohol ethoxylates (EP-A-400,585) and tristyrenephenol-ethoxylates (EP-A-102,003) have been proposed, both in combination with alkylbenzene sulfonates, as surfactants in water-emulsifiable pesticidal compositions. Combinations of castor oil ethoxylate, fatty alcohol ethoxylate, (e.g. tridecanol ethoxylate), tristyrene phenyl ethoxylate and alkylbenzene sulfonate have been disclosed as surfactants in aqueous microemulsions (DE 36 24 910).
BRIEF SUMMARY OF THE INVENTION
It has been found that the combination of a castor oil ethoxylate with a branched C
8
-C
18
alcohol ethoxylate and a tristyrenephenol-ethoxylate is a very advantageous surfactant system for water-emulsifiable or water-soluble pesticidal compositions; the novel compositions are storage stable, easy to apply, ecological and toxicological favorable and have good pesticidal efficacy.
BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS
Not applicable.
DETAILED DESCRIPTION OF THE INVENTION
Accordingly, the present invention provides a water-emulsifiable or water-soluble, storage stable, liquid, pesticidal composition, which is substantially free of water, comprising a hydrophobic pesticide or mixture of pesticides dissolved in an organic solvent and comprising as surfactants
(a) a castor oil ethoxylate having 30-50 mol ethoxylate,
(b) a branched C
8
-C
18
alcohol ethoxylate having 5-10 mol ethoxylate, and
(c) a tristyrenephenol-ethoxylate having 8-30 mol ethoxylate, or its phosphate or salt thereof.
Suitable salts with bases are, for example, metal salts, such as alkali metal or alkaline earth metal salts, for example sodium, potassium calcium or magnesium salts, or salts with ammonia or an organic amine, such as morpholine, piperidine, pyrrolidine, a mono-, di- or tri-lower alkylamine, for example ethyl-, diethyl-, triethyl- or dimethyl-propylamine, or a mono-, di- or tri-hydroxy-lower alkylamine, for example mono-, di- or tri-ethanolamine.
The compositions also include gels having a viscosity of 500 to 20,000 mPas and comprising additionally a gelling agent.
The compositions according to the invention are stable for at least 12 months at 25° C. They are very well miscible, with water, even at higher concentrations.
The surfactants mentioned above can be prepared by methods known per se; they are also commercially available. Preferred are surfactants, wherein
(a) the castor oil ethoxylate has 36-40 mol, preferably 36-37 mol ethoxylate;
(b) the branched C
8
-C
18
alcohol ethoxylate is isotridecanol ethoxylate having 5-10 mol, preferably 6-8 mol ethoxylate;
(c) the tristyrenephenol-ethoxylate has 16-18 mol ethoxylate.
It may be advantageous to add additionally an alkylbenzene sulfonate or its salt, preferably dodecylbenzene sulfonate calcium salt in an amount of 1 to 10%, preferably 2 to 4% by weight in relation to the volume of the composition.
The composition of the invention is substantially free of water, i.e. the amount of water is less that 0.5%. Some commercially available materials may contain a small amount of water, which, when more than about 0.1% can be removed for example in a separator.
In another aspect of the invention the composition is a gel with a viscosity of 500-20,000 mPas; preferably 800 to 10,000 mPas and particularly 1000-5000 mPas. The viscosity of the composition can be measured using for example a BROOKFIELD viscosimeter with spindles 1 to 3 at 30 rpm. In this case the composition additionally has to contain a gelling agent, for example oxypropylated cellulose, precipitated or fused silica (hydrophobisized or non-hydrophobisized), gelatine, polysaccharides, tetramethyl decyne diol, ethoxylated dialkyl phenol, methylated clay, propylene carbonate, hydrogenated castor oil, ethoxylated vegetable oil, sodium benzoate and hexanediol. Preferred gelling agent is oxypropylated cellulose. Gels are particularly suitable for pesticides packed into water soluble bags or sachets, which quickly dissolve when put into the water.
The organic solvents wherein the pesticide has to be dissolved may be water-immiscible or water miscible or a mixture thereof. Suitable water-immiscible solvents in which the pesticides may be dissolved are aliphatic and aromatic hydrocarbons such as hexane, cyclohexane, benzene, toluene, xylene, mineral oil or kerosene, mixtures or substituted naphthalenes, mixtures of mono- and polyalkylated aromatics commercially available under the registered trademarks SOLVESSO and SHELLSOL and PETROL SPEZIAL, halogenated hydrocarbons such as methylene chloride, chloroform and o-dichlorobenzene; phthalates, such as dibutyl phthalate or dioctyl phthalate; ethers and esters, such as ethylene glycol monomethyl or monoethyl ether, fatty acid esters; lactones such as butyrolactone, ketones, such as cyclohexanone; plant oils such as castor oil, soybean oil, cottonseed oil and possible methyl esters thereof; as well as epoxidised coconut oil or soybean oil. Preferred water-immiscible solvents are aliphatic and aromatic hydrocarbons, fatty acid esters (e.g. WITCONOL 2309), dipropyleneglycol monomethylether (e.g. DOWANOL DPM) and castor oil. Suitable water-miscible solvents in which the pesticides may be dissolved are alcohols and glycols, such as ethanol, ethylene glycol, strongly polar solvents, such as N-methyl-2-pyrrolidone, tetramethylurea, gamma-butyrolactone,dimethyl sulfoxide, N,N-dimethylacetamide and dimethylformamide; preferred are N-methyl-2-pyrrolidone and gamma-butyrolacone.
Suitable pesticides are those which are substantially insoluble in water (hydrophobic), but soluble in the organic solvent. The term pesticide is understood to encompass herbicides, insecticides, acaricides, nematicides, ectoparasiticides, fungicides and plant growth regulators. With respect to their chemical constitution, these pesticides may belong to a very wide range of compound classes. Examples of compound classes to which the suitable pesticide may belong are: acylalanines, haloacetanilides, triazole derivatives, phosphoric acid esters, pyrethroids, benzilic acid esters, polycyclic halogenated hydrocarbons, diphenyl ether derivates, formamidines, strobilurines, aryloxyphenoxy-alkanoic acid derivatives. Examples of suitable individual compounds of the above mentioned compound classes are listed below. Where known, the common name is used to designate the individual compounds (q.v. the Pesticide Manual, 10th edition, 1994,British Crop Protection Council).
Haloacetanilides: Dimethachlor, Metolachlor, Pretilachlor, 2-chloro-N-(1-methyl-2-methoxyethyl) -acet-2,6-xylidide, Alachlor, Butachlor, Propachlor, Dimethenamid.
Diphenyl ether derivates: Bifenox, 4-(4-Pentyn-1-yloxy)diphenylether, Acifluorfen, Oxyfluorfen, Fluoroglycofen-ethyl, Fomesafen, cis-trans-(±)2-ethyl-5-(4-phenoxy-phenoxymethyl)-1,3-dioxolane (“diofenolan”).
Phenoxypropionic acid derivatives: Fluazifop-butyl, Haloxyfop-methyl, Haloxyfop-(2-ethoxyethyl), Fluorotopic, Fenoxapropethyl, Quizalofop-ethyl, Propaquizafop, Diclofop-methyl.
Acy

Affiliated with

Also associated with

Rating

Pesticidal compositions does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Pesticidal compositions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pesticidal compositions will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2528236