Patent GB-628525-A (GB)
Title: Improvements in or relating to the preparation of organic mercury compounds
IPC: C07F3/10
Filed: 1944-11-15
Abstract: Paints and lacquers are made resistant to the action of fungi, bacteria and mildew by the incorporation therein, e.g. as a solid or in benzene solution, of an organic mercury sulphur compound of general formula R1-Hg-S-C\sZ, wherein R1 is a cyclic group and the free valencies of the carbon atom are attached to two or more atoms or radicles, (see Group IV (b)). The compounds are stated to be especially useful in marine paints where they may be added in linseed oil solution or as a dispersion.  In the Specification as open to inspection under Sect. 91 it is stated that the selenium analogues of the above sulphur compounds may also be used.  This subject-matter does not appear in the Specification as accepted.ALSO:Plastic materials are made resistant to the action of fungi, bacteria and mildew by the incorporation therein of an organic mercury sulphur compound of general formula R1-Hg-S-C­ wherein R1 is a cyclic group and the free valencies of the carbon atom are attached to two or more atoms or radicles.  The preparation of the compounds is described in Group IV (b).  They may be added as a solution, emulsion, dispersion or in a powdered form, with or without diluents, or they may be formed in situ in or on the material to be treated.  In the Specification as open to inspection under Sect. 91 it is stated that the selenium analogues of the above sulphur compounds may also be used.  This subject-matter does not appear in the Specification as accepted.ALSO:Organic mercury sulphur compounds of general formula R1-Hg-S-C\sZ, wherein R1 is a cyclic group and the free valencies of the carbon atom are attached to two or more atoms or radicles are obtained by treating in aqueous medium a compound R1-Hg-O-X with a compound Y-S-C\sZ, wherein R1 and the free valencies of carbon have the above significance, X is hydrogen or COR2, R2 being alkyl, and Y is an alkali metal or ammonium residue.  Reactants instanced are phenyl mercury salts of organic carboxylic acids, phenyl mercury hydroxide, pyridyl mercury or naphthenyl mercury salts of carboxylic acids and alkali or ammonium salts of organic thio-acids.  In examples, in which triethanolamine and ammonium salts may be used as solubilizing agents, phenyl mercury acetate is treated in aqueous solution with (1) sodium 2-mercapto-benzothiazole; (2) ammonium thiophenate; (3) sodium diethyldithiocarbamate; and (4) potassium ethyl xanthate to yield respectively phenyl mercury - 2 - mercapto - benzothiazole, -phenyl sulphide, -diethyldithiocarbamate, and -ethyl xanthate, and it is stated that similar compounds may be prepared from phenyl mercury hydroxide, and the tolyl-, naphthyl-, pyridyl- and naphthenyl-mercury acetates.  For uses of the compounds (see Groups III, IV (a), V, VI and VIII).  In the Specification as open to inspection under Sect. 91 the reaction is not confined to aqueous solution, alcoholic solution being instanced, and selenium analogues of the above sulphur compounds are stated to be obtainable by similar methods.  This subject-matter does not appear in the Specification as accepted.ALSO:Rubber is rendered resistant to the action of fungi, bacteria and mildew by the incorporation therein, e.g. by milling, of an organic mercury sulphur compound of the general formula R1-Hg-S-C\sM wherein R1 is a cyclic group and the free valencies of the carbon atom are attached to two or more atoms or radicles.  For the preparation of the compounds (see Group IV (b)).  It is stated that some of the compounds particularly phenyl mercury 2-mercapto-benzothiazole and diethyldithiocarbamate also act as accelerators.  The Specification as open to inspection under Sect. 91 states that the selenium analogues of the above sulphur compounds may also be used.  This subject matter does not appear in the Specification as accepted.ALSO:Fungicidal and bactericidal compositions are obtained by mixing with talc or other inert materials in a concentration of 0.5 per cent. an organic mercury sulphur compound of general formula R1-Hg-S-C-\sM wherein R1 is a cyclic group and the free valencies of the carbon atom are attached to two or more atoms or radicles.  For the preparation of the compounds see Group IVb.  The Specification as open to inspection under Sect. 91 states that the selenium analogues of the above sulphur compounds may also be used.  This subject-matter does not appear in the Specification as accepted.