Patent GB-744993-A (GB)
Title: Improvements in or relating to plastic rodent repellent composition
IPC: A01N25/00
Filed: 1953-02-12
Abstract: A rodent repellent composition comprises a synthetic resin, or a cellulose derivative admixed with from 1 to 200 per cent by weight of a complex obtained by reacting a primary or secondary amine having an ionization constant greater than 1 X 10-7 with a zinc dithiocarbamate.  The composition may contain plasticizers, pigments, stabilizers and reinforcing agents and may be in the form of an organic solvent solution or an aqueous dispersion, slurry or paste. Resins mentioned are polyethylene, polystyrene, polydichlorostyrene, copolymers of styrene, vinyl acetate, maleic anhydride, and drying oils, polyisobutylene, polymers of methyl, ethyl and isobutyl acrylate, methyl methacrylate and ethyl methacrylate, polyvinyl chloride, polyvinyl acetate, polyvinyl alcohol, polyvinylidene chloride, copolymers of vinyl chloride and vinylidene chloride, terpolymers of vinylidene chloride, vinyl chloride and ethyl acrylate, polyvinyl carbazole, unsaturated alkyds, allyl resins, coumarone-indene resins, superpolyamides, alkyd resins, phenol-, urea-, melamine-, aniline- and resorcinol-formaldehyde resins, phenol-furfural resins and furane resins.  The cellulosic material may be regenerated cellulose, methyl, ethyl, or benzyl cellulose, cellulose acetate, butyrate, nitrate, propionate or acetatebutyrate, sodium carboxymethyl cellulose or lignin cellulosic material.  The composition may be made by milling the ingredients on heated rolls, or in the case of olefinic polymers by incorporating the complex in the monomer, e.g. methyl methacrylate, and polymerizing in bulk in the presence of a catalyst, e.g. benzoyl peroxide.  Plasticizers mentioned are dioctyl and isooctyl phthalates, clay as a filler, lead carbonate as a stabilizer, and as solvents mixtures of aromatic and aliphatic hydrocarbons, and a mixture of diisobutyl ketone, xylol, and thinner.  The zinc salt may be of methyl, ethyl, dimethyl, diethyl, dibutyl, N-methyl N-ethyl, diamyl, diallyl, cyclohexyl, dicyclohexyl, N-ethyl N-cyclohexyl, benzyl, dibenzyl, tetrahydrofurfuryl, ditetrahydrofurfuryl, N-cyclopentamethylene, N-methyl N-(o-methyl cyclo hexyl), N - methyl - N - tetrahydro - alpha - furfuryl, N - cyclo - (ethylene - oxy - ethylene), 2 - ethyl - butyl, phenyl, diphenyl, or di-2-naphthyl dithiocarbamic acid, and also of dithiocarbamic acids derived from amines.  The Specification includes an extensive list of primary and secondary amines suitable as thee amine portion of the zinc dithiocarbamateamine complex.  Zinc dimethyldithiocarbamate - cyclohexyl - amine is the exemplified complex.  The compositions may be made into sheets or films which may have a reinforcing backing of paper, boxboard, strawboard, fibreboard, textile fabrics made of natural or synthetic fibres, or wood, or made into water hoses, floor coverings, or used for coating paper, or as electrical insulators.  The sheets, films, and coated materials may be used in packaging, e.g. as containers.ALSO:A rodent-repellent coating composition comprises an organic plastic material admixed with from 1 to 200 per cent by weight of a complex obtained by reacting a primary or secondary amine having an ionization constant greater than 1 X 10-7 with a zinc dithiocarbonate.  The composition may be an organic solvent solution or an aqueous dispersion, slurry, or paste and may contain plasticizers, e.g. dioctyl or isooctyl phthalate. fillers. e.g. clay, and stabilizers, e.g. lead carbonate.  Solvents mentioned are a mixture of diisobutyl ketone, xylol and thinners and mixtures of aromatic and sulphate hydrocarbons.  The organic plastic material may be a synthetic resin or cellulose derivatives (see Group IV(a)), a natural resin, e.g. shellac, a lignin resin, a derivative of casein, soyabean, cotton seed or maize protein, a cashew oil resin or an oxidized, partially polymerized drying oil. The Specification contains an extensive list of amines and zinc salts.  Zinc dimethyldithiocarbamatecyclo-hexyl-amine, is the exemplified complex. The compositions may be used for coating glass, metal and paper and like fibrous materials (see Group VIII).