Solid mixtures based on sulfonylureas and adjuvants

A solid ixture comprising PA1 a) an active ingredient from the group of the sulfonylureas and PA1 b) an alkyl ether of a copolymer of C.sub.2 -C.sub.4 -alkylene oxides.

7.1 g of premix 1
 5 g of Extrusil .RTM. (Degussa)
 77.9 g of ammonium sulfate
 were mixed, in a Moulinette kitchen blender, with 28 g of Lutensol.sup.R ON
 80 in the form of a 50% strength aqueous solution. The resulting mass was
 extruded by means of an extruder (KAR-75, Fitzpatrick Europe). The
 resulting moist granules were dried in a drying oven.
 COMISON EXAMPLE 2
 A premix consisting of:

73.1 g of SU 1 (technical grade 95.7%)
 8 g of Tamol .RTM. NH
 17.9 g of Ufoxane .RTM. 3A
 was mixed and ground in a high-speed rotor mill.
 Furthermore,

7.1 g of premix
 15 g of Extrusil .RTM. (Degussa)
 77.9 g of ammonium sulfate
 were mixed, in a Moulinette kitchen blender, with 29 g of Lutensol ON 60 in
 the form of a 50% strength aqueous solution. The resulting mass was
 extruded by means of an extruder (KAR-75, Fitzpatrick Europe). The
 resulting moist granules were dried in a drying oven.
 COMISON EXAMPLE 3
 A premix consisting of:

73.1 g of SU 1 (technical grade 95.7%)
 6 g of Tamol .RTM. NH
 17.9 g of Ufoxane .RTM. 3A
 was mixed and ground in a high-speed rotor mill.
 Furthermore,

7.1 g of premix
 5 g of Tamol .RTM. NH
 58.9 g of ammonium sulfate
 1 g of antifoam emulsion SRE
 3 g of Sipernat .RTM. 22
 25 g of Pluronic .RTM. PE 6800
 were made into a paste with 21 ml of water in a Moulinette kitchen blender.
 The resulting mass was extruded by means of an extruder (KAR-75,
 Fitzpatrick Europe). The resulting granules were dried in a drying oven.
 EXAMPLE 1
 A premix consisting of:

225 g of distilled water
 13 g of SU 1 (technical grade 95.7%)
 13 g of Tamol .RTM. NH
 26 g of Ufoxane .RTM. 3A
 2.1 g of antifoam emulsion SRE
 37.5 g of Extrusil .RTM.
 62.5 g of Wettol .RTM. LF 700
 was mixed and ground in a bead mill. The resulting suspension was used
 later as the spray mixture.
 100 g of pulverulent ammonium sulfate were introduced into a
 laboratory-size fluidized-bed granulator Combi Coata.RTM., by Niro
 Aeromatic. A two-substance nozzle was arranged above the fluidizing floor.
 What had been introduced was fluidized using air at 120.degree. C. The
 spray pressure of the two-substance nozzle was adjusted to 200 kPa, the
 spray mixture was sprayed into the fluidized bed, and the water
 evaporated. The resulting granules were screened over a screen with a mesh
 size of 0.2 mm in order to remove the fines.
 The table which follows illustrates the components used in the examples:
 TABLE 2
 Name chemical name Obtained from
 Tamol .RTM. NH naphthalenesulfonic BASF AG
 acid/formaldehyde
 condensate
 Ufoxane .RTM. 3A sodium lignosulfo- Borregaard
 nate
 Extrusil .RTM. highly disperse Degussa
 calcium silicate
 Sipernat .RTM. 22 highly disperse Degussa
 silica
 Antifoam SRE silicone oil Wacker-Chemie
 emulsion
 Lutensol .RTM. ON 60 fatty alcohol BASF AG
 ethoxylate (6EO)
 Lutensol .RTM. ON 80 fatty alcohol BASF AG
 ethoxylate (8EO)
 Aerosol .RTM. OT-B dioctyl sulfo- American Cyanamid
 succinate
 Morwet .RTM. EFW dispersant blend Witco Corp.
 Pluronic .RTM. PE 6800 EO/PO block BASF AG
 copolymer
 Plurafac .RTM. LF 700 alkylated EO/PO BASF AG
 block copolymer
 SU-1 Comp. 47 of Table 1
 Clefoxydim 2-{1-[2-(4-chloro-
 phenoxy)propyl-
 oxamino]butyl }-5-
 tetrahydrothio-
 pyran-3-ylcyclo-
 hexane-1,3-dione
 Cinidon-ethyl ethyl (z)-2-
 chloro-3-[2-
 chloro-5-(4,5,6,7-
 tetra-hydro-1,3-
 dioxoisoindole-
 dion-2-yl)-
 phenyl]acrylate
 Test Methods
 The content of active ingredient SU in the formulations in accordance with
 the above examples was determined in each case by means of quantitative
 HPLC and is shown in Table 3 in percent.
 Storage Stability Tests:
 To test for storage stability, samples of the formulation in question of
 Examples 1-4 and the Comparison Examples 1 to 3 were stored in tightly
 sealed glass containers at the temperature given in each case (54.degree.
 C. or 50.degree. C.) for a specific time (14 days or 30 days). The samples
 are subsequently examined and compared with the comparison value at the
 beginning of storage (zero value). The content of active ingredient is
 given as relative amount of SU based on the zero value (in percent). The
 storage tests were carried out by a method similar to CI MT 46. Here,
 the long-term stability of a product is estimated by short-term storage at
 elevated temperature.
 Table 3 shows the results obtained from determining the storage stability
 of the solid mixtures of Examples 1-4 and Comparison Examples 1-3.
 TABLE 3
 Content of
 active
 ingredient relative content of
 in % by active ingredient SU
 Ex. No. Adjuvant weight after 14 days, 54.degree. C.
 V1 Lutensol .RTM. ON 80 3.2 16
 V2 Lutensol ON 60 .RTM. 3.2 14
 V3 Pluronic .RTM. PE 6800 3.7 3
 1 Plurafac .RTM. LF 700 5.5 83
 The results show the superior characteristics of the solid mixtures
 according to the invention.