Plant protecting and regulating compositions – Plant growth regulating compositions
Patent
1998-12-22
2000-06-06
Dees, Jose G.
Plant protecting and regulating compositions
Plant growth regulating compositions
424405, A01N 302, A01N 2500
Patent
active
060718579
DESCRIPTION:
BRIEF SUMMARY
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.
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 favourable and which have good pesticidal efficacy.
Fatty alcohol ethoxylates, e.g. C.sub.10 -C.sub.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. C.sub.1 -C.sub.10 Alkyl ethoxylate/propoxylate-blockcopolymers and tristyrenephenol-ethoxylates have been disclosed as surfactants in aqueous suspensions (EP-A-261,492).
A novel combination of surfactants for water-emulsifiable or water-soluble pesticidal compositions has now been found; the novel compositions are storage stable, easy to apply, ecological and toxicological favourable and have good pesticidal efficacy.
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 ethoxylate and 16-48 mol propoxylate, in combination with ethoxylate, and/or 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.degree. C. They are very well miscible with water, even at higher concentrations.
The surfactants can be combined, depending for example on the kind of pesticide and the preferred solvents, as follows: combination with (3).
The surfactants mentioned above can be prepared by methods known per se; they are also commercially available.
Preferred are surfactants, wherein preferably 22 mol ethoxylate, and 30-36 mol, most preferably 34 mol propoxylate; ethoxylate having 5-10 mol, most preferably 6-8 mol ethoxylate; and
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 (hydrophobizised or non-hydrophobizised), 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 f
REFERENCES:
patent: 4870103 (1989-09-01), Roechling et al.
patent: 4973352 (1990-11-01), Heinrich et al.
Baettig William
Vogt Manfred
Dees Jos,e G.
Fishman Irving M.
Novartis Crop Protection, Inc.
Peabody, III John D.
Pryor Alton
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