GB1288094A - - Google Patents

Abstract

1288094 Biocidally active granules RIEDEL-DE HAEN AG 3 Dec 1969 [4 Dec 1968] 59072/69 Heading A5E Biocidally active granules having an average particle size between 200 and 300Á, are produced by forming an aqueous suspension containing 10-50% of a particulate absorbent carrier having a maximum particle diameter of 5Á, 0.5 to 40% of biocidally active ingredient and from 2 to 10% of water-soluble polymers, at least two different polymers being present each of which is a polyalcohol, polyester, polyglycol, polyamide or lignin sulphonate, and spray-drying the suspension using a spraying disc rotating at 5000-7000 revolutions per minute and with an air exhaust temperature of 40-50‹C. In use the granules of the invention disintegrate in stages to an ultimate average diameter of 0.1 to 5Á. By the term "biocidally active ingredient" is meant various herbicides, insecticides, fungicides, &c. Typical examples of these include 2, 4-dichlorophenoxy acetic acid, 2, 4-dichlorophenoxy propionic acid, 2, 4-dichlorophenoxy butyric acid, 2-methyl-4-chlorophenoxy acetic acid, 2-methyl-4-chlorophenoxy propionic acid, 2-methyl-4-chlorophenoxy butyric acid, 2, 4, 5- trichlorophenoxy acetic acid, 2, 4, 5-trichlorophenoxy propionic acid, beta-naphthoxy acetic acid, salts and esters of the aforesaid acids, 3- methoxycarbonylaminophenyl-N-(3'-N- methyl phenyl)-carbamate, 3-p-chlorophenyl-1, 1-dimethyl urea, 6, 6-dichlorobenzonitrile, methylthio-s-triazone, dinitro-o-cresol, 2, 2-bis-p-chlorophenyl-1, 1, 1-trichloroethane, hexachlorobicycloheptene-bis-oxymethylene-sulphide, hexachlorocyclohexane, O, O-dimethyl-2, 2, 2-trichloro-1-hydroxyethylphosphonate, O, O-dimethyl-S-(2-oxo-3-azobutyl) - dithiophosphate, copper oxychloride, copper-8-hydroxyquinoline, zinc ethylenebisdithiocarbamate and manganese ethylenebisdithiocarbamate.