HU192857B - Aequous plant protecting concentrates containing sulfur and/or copper - Google Patents

Abstract

Plant protection agent concentrates and suspensions of artificial fertilisers contg. these concentrates are prepd. by mixing 30-60 wt% of one or more plant protection agents, 1-10 wt% surfactant, 0.1-10.0 wt% thickener, which can be a polysaccharide and/or silica-gel and/or a bentonite type mine-wt% urea to make 100 wt%. - This concentrate is used in proportions of 0.3-4.0 wt% in artificial fertiliser suspensions, prepd. in the known way by mixing and milling from known artificial fertilisers.

Description

SUMMARY OF THE INVENTION The present invention relates to a composition comprising a sulfur όβ / or copper oxychloride as well as trace elements, aqueous urea, anionic and nonionic surfactants (lignin sulfonate) and polysaccharides as viscosity modifiers.

The field of application of the compositions of the invention is agriculture.

The preparation of herbicides in the form of concentrated aqueous suspensions (FW, SC) has become very widespread lately as this formulation allows for a more accurate, economical dispersion, easier handling and volume measurement compared to conventional (WP, G, D) formulations. .

General conditions for the stability of concentrated suspensions and the effects that can be achieved by stability are known in the literature. [T. Tadros: Physical feasibility of suspension concentrates, Advances in Colloid and Intarface Science, 12: 141-261 (1980)],

Generally, suspension concentrates containing crop protection azers contain 30 to 50% by weight of the active ingredient (s) and have a dispersed particle size in the range of 0.1 to 15 μa.

water or mineral oil, ethylene glycol, or other glycolics are generally used as the dispersion medium for grinding (U.S. Patent Nos. 3,948,636; and U.S. Patent Nos. 179,137 and 167,632).

Suspension formulations are required to maintain stability over time for several hours at varying temperature conditions (-10- + 36 'C), i.e., the system properties must not be noticeably changed over a period of time.

No. 1,446,771. United Kingdom Patent Specification No. 4,197,195, discloses concentrated aqueous pesticidal compositions. The pesticidal agent, which can only be ascertained from the examples, is always an organic active ingredient. According to the examples of the present invention, suspension concentrates prepared with 0.1 to 4.0 wt. The separation occurs after 1-2 hours of preparation. In the case of the composition according to the invention, this phase of separation does not occur even after 2 hours.

The need for mixing with trace fertilizers containing micronutrients has become a new requirement.

The present invention has led to the discovery that stable, cold-tolerant formulations having a theological property of spontaneously dispersing in water can be prepared by using a grinding-promoting dispersion medium.

An aqueous solution containing various micronutrients is used in the form of 4-10% by weight of urea and 0.1-4.0% by volume of X-bnn chelate.

In this way, the sulfur and / or copper oxychloride suspensions according to the invention also provide the necessary microelement replacement according to agricultural needs.

Thus, water-insoluble solids which are well soluble in urea can be made into high quality aqueous suspension concentrates, the cold tolerance of which can be controlled by the carbanide content, but α is preferably provided with 4-10% by weight of urea.

Thus, our pesticidal composition is a concentrated aqueous suspension containing 30 to 60% by weight of an ointment and / or copper oxide, 2 to 6% by weight of ionic and non-ionic surfactants, which have a weight ratio of (1-2): 1. a mixture of 2: (0-1) is preferred. As the ionic surfactant, lignin sulfonate having an average molecular weight of 1000 to 100,000, preferably 8500 to 50,000; which may be sodium and / or calcium. Nonionic surfactants include C12-C16 alcohols having an ethylene oxide number of 6 to 12.

The composition further comprises 0.2-0.5% by weight of anionic polysaccharide having an average molecular weight of 1-3 million, and an aqueous solution containing 4-10% by weight of urea as a grinding dispersion medium and 0.1-4.0% by weight of a micronutrient chelating complex.

For the preservation of the compositions of the invention, 0.01 to 0.02% by weight of a preservative may be used, preferably sodium benzoate or formaldehyde.

The pesticidal composition is prepared by adding the chelating component to the aqueous side containing 4 to 10% by weight of urea, followed by heating the mixture of micronutrient salts to 60 ° C and stirring for 1/2 hour. After cooling to room temperature, the other components are added, and the suspension thus prepared is ground in a suitable mill, and the solid content of the preparation is further milled to a suitable particle size, preferably 0.1 to 15.0 μα.

The viscosity of the prepared suspension can also be subsequently adjusted by homogenizing it by varying the viscosity.

The following examples illustrate the present invention.

Example 1

Sulfur concentrate is a slurry concentrate

Using a 250 liter mixer Add 81.21 kg of water to a fired open container and dissolve, with constant stirring, 30 kg of technical urea, 1.284 kg of Selecton-2B (ethylenediaminetetraacetea), 0.105 kg of magnesium sulfate, 0.68 kg of manganese sulfate, 0.0369 kg of iron II) azulphate, 0.021 kg of cobalt nitrate. The mixture was heated to 60 ° C and stirred at this temperature for 1/2 hour.

After cooling to room temperature, 12 kg of an average molecular weight of 20,000-50,000 sodium lignin sulfonate (Ultrazin NA) and 0.9 kg of an anionic type polyazaccharide (Rhodopol-23) of an average molecular weight of 10,000-50,000 and 174.0 kg of sulfur powder are added. while. Stirring is continued until a well pumpable suspension is obtained. This mixture is known in the known manner and equipment for approx. It is milled to a particle size of 100 µm and then further ground with other suitable equipment so that the final particle size is less than 5.0 µm. The resulting composition is 300 kg with a density of 1.52 kg / dm ³ and thus contains 880 g of sulfur per liter.

Example 2

Copper oxychloride-containing azure suspension concentrate

Weigh 93.84 kg of water into a 250 liter open-ended container with stirrer and dissolve with stirring 25.5 kg of technical urea, 8.577 kg of Selecton-2B, 0.051 kg of ferric sulphate, 0.267 kg of boric acid, 0.501 kg Copper sulfate, 0.027 kg of ammonium molybdenate, 0.066 kg of cobalt nitrate, and then the temperature of the mixture was stirred at 60 ° C while stirring and maintained at this temperature for 1/2 hour. The mixture is cooled to room temperature and then 12 kg of an average molecular weight of 8,500-15,000 of sodium ligninase sulfonate, 0.6 kg of anionic polysaccharide of 1-3 million average molecular weight and 156 kg of a minimum 50% copper copper oxide are added. 0.06 kg of sodium benzoate and stirred until a well-drained suspension is obtained. This mixture is known in the known manner and equipment for approx. They are pre-milled to a particle size of 100 µm and then further ground with other suitable equipment such that the solids end has a particle size of less than 5.0 µm. The resulting composition contained 800 g / l of copper oxychloride. It has a density of 1.538 kg / l.

Example 3

Sulfur sulphate concentrate

Weigh 89.61 kg of water into a 250 liter open tank with stirrer and dissolve 26.43 kg of urea, 8.577 kg of Selecton-2B, 0.051 kg of ferric sulfate, 0.9 kg of zinc sulfate with constant stirring. 1.611 kg of manganese sulfate, 0.027 kg of ammonium molybdenate, 0.066 kg of cobalt nitrate were added and the temperature was raised to 60 ° C. After stirring for 0.5 h at this temperature, 9 kg of calcium lignin sulfonate having an average molecular weight of 15,000-50,000, 0.9 kg of anionic polysaccharide having an average molecular weight of 1-3 million, and 0.06 kg of sodium bonzoate are added, and 162 kg of smear. The slurry is stirred until it becomes pumpable, and the mixture is pre-milled to 100 µm in a known manner and equipment and further milled with other suitable equipment so that the final particle size of the solid is less than 5.0 µm. The resulting composition has a density of 1.48 kg / dm ³ , i.e. 800 g / l sulfur.

Example 4

Copper oxide chloride containing concentrate

Weigh 98.34 kg of water into a 250 liter open-ended mixer and add, while stirring, 31.2 kg of urea, 1.284 kg of Selecton-2B, 0.105 kg of magnesium sulfate, 0.168 kg of manganese sulfate, 0.039 kg of boric acid, 0.048 kg copper sulfate, 0.039 kg of va (n) sulfate, 0.021 kg of cobalt nitrate, 0.075 kg of zinc sulfate, 0.021 kg of ammonium molybdenate, and the mixture was heated to 60 ° C and after stirring for half an hour at room temperature cool back. 12 kg of sodium lignin sulfonate and 0.6 kg of anionic polysaccharide were then added followed by 156 kg of 50% copper oxychloride and 0.06 kg of sodium benzoate. The appropriately mixed suspension is milled so that the solids have a particle size of less than 10 µm.

The resulting composition contained 800 g / l of copper oxide chloride and a density of 1.53 kg / dm ³ .

Example 5

Sulfur and copper-containing suspension concentrates

150 kg of the composition described in Example 1 are added to a stirred apparatus to homogenize the compound of Example 4. 150 kg. This gives a composition containing 440 g / l of smear and 400 g / l of copper oxychloride.

Example 6

Sulfur and copper sulphate concentrate

Example 2 150 kg of the preparation according to Example 3, Homogenize with 150 kg. In this way, 400 g / l of smear and

A composition containing 400 g / l of copper oxychloride and micronutrients was obtained.

Example 7

A suspension containing copper oxychloride

Weigh 97.60 kg of water into a 250 liter open mixer and mix with 18 kg of urea, 1.284 kg of Selecton-2B, 0.168 kg of manganese sulfate, 0.105 kg of magnesium sulfate, 0.039 kg of boric acid, 0.048 kg of copper. sulfate, 0.039 kg iron (II) -8 sulfate, 0.021 kg cobalt nitrate, 0.075 kg zinc sulfate, 0.021 kg ammonium molybdenate, and the mixture was heated to 60 ° C and, after stirring for half an hour, was cooled to room temperature. . Then 1.5 kg of an average molecular weight of 20,000-50,000 sodium lignin sulfonate, 1.5 kg of an average molecular weight of 80,000-100,000 sodium lignin sulfonate are added followed by 6.0 kg of ethoxylated tridecyl alcohol.

168.6 kg of 50% copper oxide chloride and 0.06 kg of sodium benzoate. The mixed slurry was ground to a particle size of less than 10 μm.

Example 8

Copper and sulfur sulphate concentrate

Weigh 183.45 kg of water into an open container with 500 liters of B mixer and dissolve in it with stirring 51.93 kg of technical urea, 17.154 kg of Selecton-2B, 0.102 kg of iron (II) sulphate, 1.8 kg of zinc sulphate, 3,222 of manganese bisulfate, 0.534 kg of boric acid, 1.002 kg of copper sulfate, 0.054 kg of ammonium molybdenate, 0.132 kg of cobalt nitrate, and the temperature of the mixture was raised to 60 ° C with stirring and maintained at this temperature for 1/2 hour.

The mixture is cooled to room temperature and then 21 kg of an average molecular weight of 8,500 to 15,000 of sodium lignin sulfonate and 1.2 kg of anionic polysaccharide of average molecular weight of 1-3 million and 156 kg of copper oxide chloride with a minimum 50% copper content are added.

The suspension is known in the known manner and equipment for approx. It is milled to a particle size of 100 µm and further ground with other suitable equipment so that the solid particle size is less than 10 µm. The resulting composition contains 400 g / l copper oxychloride and 100 g / l smear.

The main advantages of our invention are:

The concentrates of the present invention are water-dispersible, stable cold-space formulations which can be used in concentrations suitable for agricultural purposes. The concentrates are well mixed and well handled. They can be dispensed with the usual equipment.

Claims (2)

PATENT CLAIMS Sulfur and / or copper-containing aqueous pesticide concentrate, characterized in that the composition comprises 30-60% by weight of sulfur and / or copper oxychloride, 2-6% by weight of ionic and non-ionic surfactant (1-2) :( 0 -1) by weight mixture, preferably a lignin sulfonate having an average molecular weight of 1000-100,000 and an ethoxylated C12-16 fatty alcohol in a 2: 1 weight ratio, 0.2-0.5% by weight of anionic polysaccharide having an average molecular weight of 1-3 million, as a dispersion medium. It contains 4-10% by weight of urea, 0.1-4.0% by weight of various microelements in the form of chelates and optionally 0.01-0.02% by weight of a preservative, preferably sodium benzoethane, in aqueous solution. Composition according to Claim 1, characterized in that it contains magnesium, manganese, boron, zinc, iron (II), cobalt and / or molybdenum as a trace element.