Plant protecting and regulating compositions – Plant growth regulating compositions
Patent
1993-08-26
1995-12-12
Clardy, S. Mark
Plant protecting and regulating compositions
Plant growth regulating compositions
504212, 504213, 504214, 504215, 504330, 424409, 71DIG1, A01N 2508, A01N 2512, A01N 4736
Patent
active
054749719
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to water-dispersible granular compositions comprising active ingredients of value in agriculture.
It is advantageous to formulate active pesticides as water-dispersible compositions which can be readily mixed with water and applied by means of a spraying apparatus to a locus to be protected. It is also advantageous that such granular compositions can be readily dispersed or dissolved in water. It is also advantageous that the granular compositions have good attrition resistance, uniform size granules and uniform bulk density.
World Patent WO 89/00079 discloses an extrusion process to make water-dispersible granules of agricultural chemicals in which water is added to make an extrudable wet mix. The extrudate is rolled to break the product down to granules and then optionally dried.
U.S. Pat. No. 4,065,289 discloses a herbicidal composition containing a plant fertilizer component and a herbicide component which is extruded through a die at 70.degree. C.-145.degree. C. The herbicide component acts as a lubricant to permit ready extrusion and to form a coherent extrudate.
SUMMARY OF THE INVENTION
The present invention is directed to rapidly disintegrating water-dispersible granular agricultural compositions comprising by weight based on the total weight of the composition: temperatures between 40.degree.-120.degree. C.; and
The invention is also directed to a process for preparing the compositions of the invention, said process comprising extruding a premix through a die or screen at elevated temperature without using any water. Accordingly, the process of the invention comprises extruding a dry premix comprising by weight based on the total weight of the composition: temperatures between 40.degree.-120.degree. C.; and C. and chopping or milling the extruded material to form uniform granules.
The active ingredient is at least one chemical used for crop protection or plant growth regulation or pesticide. More specifically, ingredients are selected from the class of herbicides, fungicides, bactericides, insecticides, insect antifeedants, acaricides, miticides, nematocides, and plant growth regulants.
The preferred compositions of the invention are: comprise 0.03-80%, the heat activated binder(s) comprise 1-15% and the water-soluble diluent(s) comprise 1-40% by weight based on the total weight of the composition. 10-70% by weight. urea, ethylurea, sorbitol, lactose or sodium acetate trihydrate and mixtures of the foregoing. selected from the classes consisting of polyethoxylated alkylphenols and ethylene oxide/propylene oxide copolymers and mixtures of the foregoing. cross-linked polyvinyl pyrrolidone or cross-linked sodium carboxymethyl cellulose. napthalene-sulfonate-formaldehyde condensate or a ligninsulfonate. block copolymer of ethylene oxide/propylene oxide where 80% is ethylene oxide and 20% is propylene oxide, or polyethoxylated dinonylphenol with 150 ethylene oxide units. or sorbitol. N'(3,4-dichlorophenyl)-N,N-dimethyl urea (diuron) . 2-benzimidazole-carbamate (carbendazim). 3-cyclohexyl-6-dimethylamino-1-methyl-1,3,5-triazin-2,4-(1H,3H)dione (hexazinone). selected from: 2-[[[[(4,6-dimethyl-2-pyrimidinyl)amino]carbonyl]amino]sulfonyl]benzoate; 3-[[[[(4-methoxy-6-methyl-1,3,5-triazin-2-yl)amino]carbonyl]amino]sulfonyl ]-2-thiophenecarboxylate; -sulfonamide; 2-[[[[(4-chloro-6-methoxy-2-pyrimidinyl)amino]carbonyl]amino]sulfonyl]benz oate; 2-[[[[(4-methyl-6-methoxy-1,3,5-triazin-2-yl)amino]carbonyl]amino]sulfonyl ]benzoate; N-dimethyl-3-pyridinecarboxamide; 2-[[[[[4-ethoxy-6-(methylamino-1,3,5-triazin-2-yl]amino]carbonyl]amino]sul fonyl]benzoate; 2-[[[[N-(4-methoxy-6-methyl-1,3,5-triazin-2-yl)-N-methylamino]carbonyl]ami no]sulfonyl]benzoate; 2-[[[[[(4,6-dimethoxy-2-pyrimidinyl)amino]carbonyl]amino]sulfonyl]methyl]b enzoate; ne sulfonamide; 2-[[[[[4,6-bis(difluoromethoxy)-2-pyrimidinyl]amino]carbonyl]amino]sulfony l]benzoate; benzene sulfonamide; 5-[[[(4,6-dimethoxy-2-pyrimidinyl)-amino]carbonyl]amino]sulfonyl]-1-methyl -1H-pyrazole-4-carboxylate
REFERENCES:
patent: 4065289 (1977-12-01), Judd
patent: 4698264 (1987-10-01), Steinke
patent: 4816298 (1989-03-01), Alderman et al.
patent: 4979979 (1990-12-01), McCollum, III et al.
patent: 5180587 (1993-01-01), Moore
patent: 5208030 (1993-05-01), Hoy et al.
Clardy S. Mark
E. I. Du Pont de Nemours and Company
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