Efficacy enhancer for agricultural chemicals and agricultural ch

Details Efficacy enhancer for agricultural chemicals and agricultural ch Efficacy enhancer for agricultural chemicals and agricultural ch

1997-09-05

2000-07-25

Kumar, Shailendra

Plant protecting and regulating compositions

Plant growth regulating compositions

252352, 252356, 252357, 424405, 504171, 504172, 514784, 514785, 514788, A01N 3304, A01N 3102

Patent

active

060936797

DESCRIPTION:

BRIEF SUMMARY
FIELD OF THE INVENTION

This invention relates to a novel efficacy enhancer for agricultural chemicals, an efficacy enhancing composition for agricultural chemicals, and agricultural chemical compositions containing them.


PRIOR ART

The agricultural chemicals including insecticides, bactericides, herbicides, acaricides, and plant growth regulators are used in such forms as emulsifiable concentrates (emulsions), wettable powders, granules, dusts, flowable powders, and liquids. Various devices pertaining to agricultural properties have been proposed for the purpose of thoroughly eliciting the effects of such agricultural chemicals. With all the latest techniques, however, it is difficult to further enhance the efficacy of the agricultural chemicals by virtue of a agricultural device. Since it is still more difficult to develop novel agricultural chemicals, the act of enabling the existing agricultural chemicals to manifest an enhanced activity is immensely significant from the industrial point of view.
It has been well known that various surfactants are utilized as an efficacy enhancer for agricultural chemicals. It is known, for example, that the combination of an anionic surfactant with a chelating agent affords a composition which is highly effective in bipyridinium type herbicides (WO95/31903). It is also known that a highly effective efficacy enhancer for agricultural chemicals is obtained by combining a cationic surfactant with a chelating agent and subsequently incorporating another surfactant in the resultant mixture (WO95/17817).
It is further known that an alkyl or alkenyl polyoxyalkylene ether acetic salt is highly effective. When this salt is combined with an additive such as, for example, a chelating agent, a thickener, and an inorganic substance, the stability is degraded so much as to render formulation of the combination extremely difficult. Thus, the combination has never been reduced to practice. Particularly, this degradation of the stability is conspicuous when the salt is incorporated at a high concentration into the combination. Further, the alkyl or alkenyl polyoxyalkylene ether acetate has so high an acidity (pH 2) that it may be dangerous in use and that, in the formulation of an agricultural chemical, it may possibly decompose other surfactants as well as the agricultural chemical itself and degrades the activity of the formulation as well.


SUMMARY OF THE INVENTION

The present inventors have continued a diligent study in search of an efficacy enhancer for agricultural chemicals which, when used in combination with an agricultural chemical, increases or enhances the efficacy of the agricultural chemical. They have consequently found that alkyl or alkenyl amine salts of specific alkyl or alkenylpolyoxyalkylene ether carboxylic acids manifest a particularly strong efficacy enhancing activity to various agricultural chemicals. This invention has been perfected as a result.
Specifically, this invention is directed to providing an efficacy enhancer for agricultural chemical, which comprises a compound of the general formula (I): ##STR2## wherein X is --O-- or --CONH--; R.sup.1 is a linear or a branched alkyl group of 6-20 carbon atoms, a linear or a branched alkenyl group of 6-20 carbon atoms, or an alkylphenyl group containing an alkyl group of 6-18 carbon atoms; R.sup.2 is an alkylene group of 1-4 carbon atoms; R.sup.3, R.sup.4 and R.sup.5 are the same or different from each another and at least one of R.sup.3, R.sup.4 and R.sup.5 is selected from the group consisting of a linear or a branched alkyl group of 6-30 carbon atoms and a linear or a branched alkenyl group of 6-30 carbon atoms, and the remainder of R.sup.3, R.sup.4 and R.sup.5 are selected from the group consisting of a benzyl group, hydrogen, and --(A.sup.2 O).sub.m --H; A.sup.1 and A.sup.2 are independently an alkylene group of 2-4 carbon atoms, n is a number of 1-30 on the average, and m is a number of 1-15 on the average.
This invention further concerns the efficacy enhancer mentioned above, wherein X is --O--; R.sup.

REFERENCES:
patent: 3775052 (1973-11-01), Van Paassen
patent: 4834908 (1989-05-01), Hazen et al.
patent: 4865757 (1989-09-01), Singh-Verma et al.
patent: 5622911 (1997-04-01), Hasbe et al.
Abe et al, J of American Oil Chemists' Society, vol. 46, pp 865-867, 1969.

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