Patent GB-643519-A (GB)
Title: Improvements in or relating to horticultural compositions
IPC: A01N41/12
Filed: 1947-10-17
Abstract: Aqueous dispersions of a polymeric organic polysulphide, such as polyethylene polysulphide, together with the addition product of a zinc salt of an alkyl, alicyclic or aralkyl substituted dithiocarbamic acid and an aliphatic, alicyclic or heterocyclic amine wherein the components directly attached to the nitrogen atom are free from aromatic unsaturation are used as a horticultural spray. The polyethylene polysulphide is prepared by reacting an aqueous solution of sodium polysulphide having an average sulphur-content of 4.5 sulphur atoms per molecule, with 1.2-dichloroethylene and ethylene dichloride in the presence of a salt stable emulsifying agent such as casein, sodium or calcium lignin sulphonates, alkyl benzene or naphthalene sulphonates, kymolal sulphates, sorbitan monolaurate, but preferably lignin sulphonate.  The zinc dithiocarbamate-amine addition product is formed by first reacting a primary or secondary amine with carbon disulphide in the presence of a water-soluble zinc salt, then reacting the zinc dithiocarbamate with the desired amine.  The Specification contains lists of suitable amines for the formation of the dithiocarbamate and for the addition products thereof.ALSO:A composition which reduces the fruit set on trees sprayed therewith and having insecticidal and fungicidal properties, comprises an aqueous dispersion of a polymeric organic polysulphide, such as polyethylene polysulphide, and the chemical addition product of a zinc salt of an alkyl, alicyclic or aralkyl substituted dithiocarbamic acid and an amine in which the components directly attached to the nitrogen atom are free from aromatic unsaturation.  Specified zinc salts are those of dimethyl-, cyclohexyl-, tetrahydrofurfuryl-, benzyl-, diethyl-, dibutyl-, diamyl-, ethylcyclohexyl-, dibenzyl-, ditetrahydrofdrfuryl- and pentamethylene-dithiocarbamic acids, as well as the zinc salts derived from dithiocarbamic acids produced by reacting carbon disulphide with the following amines: di-n-propyl-, methyl ethyl-, di-isopropyl-, di-n-butyl-, N-methyl cyclohexyl-, N-butyl cyclohexyl-, N-methyl-o-methyl cyclohexyl-, N-methyl tetrahydro alpha furfuryl-, N-butyl tetrahydro alpha furfuryl amines, morpholine, piperazine, piperidine, ethylene diamine, symmetrical diethyl ethylene amine or symmetrical dibutyl trimethylene diamine.  Amines which may be reacted with the above zinc dithiocarbamates are for example cyclohexylamine, piperidine, morpholine, methylamine, ethylamine, butylamines, amylamines, hexadecylamine, octadecylamine, dimethyl amine, diethyl amine, dibutyl amine, diamyl amine, trimethyl amine, triamyl amine, ethylene diamine, piperazine, hexadecyl propylene diamine, dibutyl ethylene diamine, diethylene triamine, dimethyl ethylene diamine, symmetrical diethyl trimethylene diamine, symmetrical dipropyl ethylene diamine, N-ethyl cyclohexyl amine, furfuryl amine, and N-substituted furfuryl amines.  Emulsifying agents such as casein, sodium or calcium lignin sulphonates, alkyl benzene or naphthalene sulphonates, hymolal sulphates, sorbitan monolaurate or preferably lignin sulphonate may be used to aid dispersion.  Specific examples relate to compositions comprising aqueous dispersions of polyethylene polysulphides and the addition product of zinc dimethyldithiocarbamate and cyclohexylamine, together with emulsifying agents.  Other insecticides such as D.D.T., nicotine sulphate, arsenicals, rotenone or pyrethrins may be added.ALSO:An aqueous dispersion which when sprayed on trees reduces the fruit set, comprises a polymeric organic polysulphide (see Group IV(a)) and the chemical addition product of a zinc salt of an alkyl, alicyclic or aralkyl substituted dithiocarbamic acid and an amine having no aromatic substituents attached to the nitrogen.  Emulsifying agents and insecticides may be added.