Patent GB-631318-A (GB)
Title: Improvements in or relating to pesticidal compositions
IPC: A01N47/48
Filed: 1946-07-18
Abstract: Beta thiocyano aldehydes or ketones are prepared by reacting the corresponding alphabeta unsaturated carbonyl compound with an inorganic thiocyanate and a mineral acid.  Specified starting compounds are acrolein, crotonaldehyde, 2-methyl-2-butenal, 2-ethyl-2-hexenal, cinnamaldehyde, mesityl oxide, 5-methyl-4-hepten-3-one, 5-ethyl-4-hepten-3-one, 3-penten-2-one, benzalacetophenone, 5-phenyl-4-penten-3-one, 4-phenyl-3-methyl-3-buten-2-one and benzalacetone.  According to an example, an aqueous solution of sodium thiocyanate is added slowly to a stirred mixture of mesityl oxide and aqueous sulphuric acid at 30 DEG  C. 4-Thiocyano-pentan-2-one separates as a red oil.  The Specification as open to inspection under Sect. 91 comprises also the preparation of beta cyano carboxyl compounds in the same manner from other alpha-beta unsaturated carbonyl compounds such as acrylic acid, methylacrylate, methacrylic acid, methyl methacrylate, cinnamic acid, atropic acid, crotonic acid, maleic and fumaric acids, acrylamide, methacrylamide, cinnamamide, crotonamide, acrylyl chloride, methacrylchloride, cinnamoyl chloride and crotonyl chloride.  This subject-matter does not appear in the Specification as accepted.ALSO:A pesticidal composition comprises a small proportion of a beta thiocyano aldehyde or ketone, formed by the reaction of an alpha-beta unsaturated carbonyl compound, an inorganic thiocyanate and a mineral acid, in admixture with a fluent carrier, that is a substance which forms solutions, dispersions or dusts with the active compound.  The cyano aldehydes or ketones may be derived from acrolein, crotonaldehyde, 2-methyl-2-butenal. 2-ethyl-2-hexanal, cinnamaldehyde, mesityl oxide, 5-methyl-4-hepten-3-one, 5-ethyl-4-hepten-3-one, 3-penten-2-one, benzalaceto-phenone, 5-phenal-4-penten-3-one, 4-phenyl-3-methyl-3-buten-2-one and benzal acetone.  Fluent carriers include talc, calcium carbonate, tricalcium phosphate, water and alcohol.  Other specified additions include active insecticides, fungicides and bactericides such as metallic arsenicals, fluosilicates, phenothiazine, nicotine sulphate, pyrethrum and isobutylundecylamide; dispersing, wetting and spreading agents such as lauryl alcohol, long chain alcohol sulphates, sulphated and sulphonated alcohols sodium salts of sulphated alcohols, sulphonated aromatic and alkyl-amyl derivatives, hexahydric alcohols, esters of fatty acids, pure oils and soybean lecithin; and adhesive or sticking agents such as milk products, flour, gelatine and fish oils.  The Specification as open to inspection under Sect. 91 comprises also insecticidal compositions comprising thiocyano carbonyl componds derived in the same manner from other unsaturated carbonyl compounds such as acrylic acid, methyl acrylate, methacrylic acid, methyl methacrylate, cinnamic acid, atropic acid, crotonic acid, maleic acid, fumaric acid, acrylamide, methacrylamide, cinnamamide, crotonamide, acrylyl chloride, methacryl chloride, cinnamoyl chloride and crotonyl chloride. This subject-matter does not appear in the Specification as accepted.