Patent GB-658222-A (GB)
Title: Improvements in or relating to pesticidal compositions and pest control
IPC: A01N25/10
Filed: 1949-05-20
Abstract: A pesticidal composition comprises a pesticidal active chemical agent admixed with an aqueous dispersion of a water insoluble finely divided (preferably of particle size 0.01 to 2.0 microns) polymer of vinyl chloride and/or vinylidene chloride or with a finely divided polymer in powder form obtained by spray drying such an aqueous dispersion.  Suitable dispersing agents are alkyl and aralkyl sulphates and sulphonates, especially sodium lauryl benzene sulphonate.  The polymer may be replaced by a copolymer of vinyl chloride with vinylidene chloride, a copolymer of either or both of these with one or more other unsaturated compounds such as acrylonitrile; styrene; ethylene; esters of acrylic and substituted acrylic acids, e.g. methyl and ethyl acrylate, methyl methacrylate; vinyl esters of carboxylic acids such as vinyl acetate and vinyl benzoate; dialkyl esters of maleic and fumaric acids.  The pesticide may be an insecticide, a fungicide or herbicide.  Specified insecticides are cryolite, sodium fluoride, sodium silicofluoride and barium silicofluoride; Paris Green, London Purple, lead and calcium arsenate; lead chromate and copper cyanide; hydrocarbon oil; D.D.T., gamma hevachloro-cyclohexane, chlordane, chlorinated hydrocarbon in general; organic thiocyanates and thiophosphates, e.g. lauryl thiocyanate and o, o-diethyl-o-p-nitrophenyl thiophosphate; dinitrophenols, e.g. 3, 5-dinitro-o-cresol; amines such as cyclohexylamine and safrale. Specified fungicides are quaternary ammonium salts such as lauryl isoquinolinium bromide, lauryl pyridinium bromide, lauryl isoquinlinium rhodonate, p-octylphenoxyethyl benzyl dimethyl ammonium chloride, the reaction product of N, N, N1, N1-tetramethyl-p-phenylenediamine with decamethylene dibromide; organic sulphur compounds, e.g. ferric dimethyl dithiocarbonate, tetramethyl thiuram disulphide, morpholine thiuram disulphide, o-nitrophenyl dimethyl thiocarbamyl disulphide, zinc dimethyl dithiocarbamate, disodium ethylene bis-dithiocarbamate, complexes of zinc dimethyl dithiocarbamate with organic amines such as cyclohexylamine and ethylene diamine, reaction product of mecapto-benzothiazole and formaldehyde, polyethylene polysulphide, sulphonamides of thiazoles and amines, di-m-cresol disulphide, p-chloro phenol monosulphide, 2-mercapto 3.5.5.-trimethyl thiazine and the salts and esters thereof, bis-(2-thiazolinyl) thiomethyl cyclohexylamine, rhodamine, dinitro-o-cyclohexyl phenol, trichlorophenol and the zinc salt thereof, sodium dinitro-o-cresolate, diphenyl quinidine phthalate, 2, 3-lichloronaphthoquinone 1, 4, 21, 2-dihydroxy 5, 51 dichloro diphenyl methane, tetrachloro-benzoquinone, trichlorophenyl acetate, glyoxalidine, phenyl mercuri-p-toluene sulphonamide, copper 8-hydroxyquinoline, phenyl mercuri acetate; sulphur, lime sulphur, ammonium polysulphide, calcium monosulphide, Bordeaux mixture, Burgundy mixture, mercuric chloride and cuprammonium salts Specified herbicides are sodium isopropyl xanthate, ammonium sulphate, pentachlorophenyl allyl carbonate, 2, 4-dichlorophenoxy acetic acid and its salts and esters.  The polymers serve as "stickers" and prevent the spray residues being washed away by rainfall. Specification 658,221 is referred to.