Plant protecting and regulating compositions – Plant growth regulating compositions
Patent
1996-01-03
1997-09-30
Clardy, S. Mark
Plant protecting and regulating compositions
Plant growth regulating compositions
504234, 504237, 504330, 71DIG1, 424405, 514376, 514383, 514395, 514941, A01N 2530
Patent
active
056725647
DESCRIPTION:
BRIEF SUMMARY
This application has been filed under 35 USC 371 from international application PCT/EP94/02085, filed Jun. 27, 1994.
The present invention relates to an aqueous, multiphase, stable finished fomulation for crop protection active compounds, containing in addition to water
The invention additionally relates to processes for preparing these finished formulations and the use of crop protection active compounds for preparing finished formulations of this type.
To achieve a uniform wetting of the plants to be treated, to improve the absorption of the active compound into the plants to be treated and to assist the transport of the active compounds into the treated plants, additional auxiliaries, e.g. wetting agents, are added to the crop protection active compounds before use. These auxiliaries can either already be added to the formulation of the crop protection active compound or they can be added by the user of the spray liquor of the active compound.
With regard to simple and safe handling and problem-free metering ability of these auxiliaries by the user and with regard to the avoidance of packaging which additionally has to be disposed of, formulations of crop protection active compounds are preferred which already contain auxiliaries of this type.
Since these wetting agents in general are liquid or waxy compounds, they can only be used in particular cases for preparing solid formulations. However, in order to obtain the powdery consistency of solid formulations, the liquid wetting agents have to be absorbed in a separate working step on absorbent materials such as silica gel and ground, which significantly increases the formulation costs and at the same time limits the amount of wetting agent which can be employed. For the user, highly concentrated stable multiphase mixtures are more advantageous, since they are optimized with regard to biological activity and problems in mixing in the spray tank do not apply (D. Seaman, Pesticide Sci., 1990, 29, 439-449; Trends in the Formulation of Pesticides). Liquid finished formulations (formulations of crop protection active compounds and auxiliaries) are therefore customarily sold.
Emulsion concentrates (EC) and suspension concentrates (SC), for example, are known from the literature as liquid formulations for crop protection active compounds (cf. Th. F. Tadros, Disperse Systems in Pesticidal Formulations; Advances in Colloid and Interface Science, 32 (1990) 205-234), an organic solvent in the case of the emulsion concentrates and water in the case of the suspension concentrates being used as a medium or carrier.
A disadvantage of the EC formulation is the use of relatively large amounts of organic, usually readily flammable solvents which result in additional endangering of the user and increased pollution of the environment.
In the preparation of suitable SC formulations, on the other hand, the problem poses itself that because of the frequently poor solubility in water of the wetting agents customarily used, a homogeneous or stable homogeneous formulation cannot be obtained.
It is an object of the present invention to provide a phase-stable finished formulation of crop protection active compounds and auxiliaries which do not have the above disadvantages.
We have now found the finished formulation described at the beginning. Processes for the preparation of finished formulations of this type have additionally been found.
The finished formulations according to the invention in general contain from 10 to 700 g/l, preferably from 50 to 600 g/l, in particular from 100 to 500 g/l, of one or more crop protection active compounds.
In the finished formulations according to the invention, fundamentally all crop protection active compounds can be prepared whose melting point is at least 50.degree. C. The preparation of crop protection active compounds having a lower melting point is in general likewise possible if suitable process conditions are adhered to in the preparation. Examples of suitable crop protection active compounds are, inter alia, 2-chloro-4-ethylamino-6-isopr
REFERENCES:
patent: 4305750 (1981-12-01), Kleuser et al.
patent: 4875929 (1989-10-01), Morgan et al.
patent: 5073189 (1991-12-01), Bell
patent: 5362707 (1994-11-01), Fiard et al.
Fricke Hans-Michael
Kardorff Uwe
Kober Reiner
Parg Adolf
Wigger August
BASF - Aktiengesellschaft
Clardy S. Mark
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