Patent GB-491075-A (GB)
Title: Improved manufacture of rubber chloride compositions
IPC: C08K5/17
Filed: 1937-02-22
Abstract: A small amount of an organic compound containing the group =C=X, where X is sulphur or an imino or substituted imino radicle, is added to a rubber chloride composition or varnish, so that, on heating the composition or dried films of the varnish, the rubber chloride is rendered resistant to solution and hardened.  Suitable organic compounds include piperidine pentamethylene dithiocarbamate, dimethylaminodimethyldithiocarbamate, the diphenylguanidine salt of dimethylamino-dimethyldithiocarbamic acid, oxidation products of the dithiocarbonates, thiuram mono- and di-sulphides, tetramethyl thiuram monosulphide, thiocarbanilide, diorthotolylthiourea, anhydroformaldehyde aniline, zinc butyl xanthate, and mercaptobenzothiazole with or without dinitrochloro-benzene and diphenyl guanidine.  Zinc oxide, magnesia, lime and litharge may be added as accelerators. In making a plastic composition, e.g. an extruded insulation on wire, softeners such as stearic acid, chlorinated naphthalene and tricresylphosphate may be used, and a solution of one of the said organic compounds may be applied to the extruded product, which is then heated to 80-150 DEG  C.  In making varnishes, paints, protective and waterproof coating compositions, the solvent mixtures used may include toluol, xylol, p-cymene, solvent naphtha, hydrogenated naphthalene, p-methyl-isopropylbenzene, di-(chlorethyl)-ether, tricresyl phosphate, and the stearic ester of glycol butyl ether.  Specifications 461,631; 490,824, [Group V], 491,015; and 491,141, [Group V], are referred to.  The Specification as open to inspection under Sect. 91 refers also to the use of diphenyl- and ditolyl-guanidine, and condensation products of ammonia or aniline and aldehydes.  This subject-matter does not appear in the Specification as accepted.ALSO:A small amount of an organic compound containing the group =C=X, where X is sulphur or an imino or substituted imino radicle, is added to a rubber chloride composition or varnish, so that, on heating the composition or dried films of the varnish, the rubber chloride is rendered resistant to solution and hardened.  Suitable organic compounds include piperidine pentamethylene dithiocarbamate, dimethylaminodimethyldithiocarbamate, the diphenylguanidine salt of dimethylamino - dimethyldithiocarbamic acid, oxidation products of the dithiocarbonates, thiuram mono- and di-sulphides, tetramethyl thiuram monosulphide, thiocarbanilide, diorthotolylthiourea, anhydroformaldehyde aniline, zinc butyl xanthate, and mercaptobenzothiazole with or without dinitrochlorobenzene and diphenyl guanidine.  Zinc oxide, magnesia, lime and litharge may be added as accelerators.  In making a plastic composition, e.g. an extruded insulation on wire, softeners such as stearic acid, chlorinated naphthalene and tricresylphosphate may be used, and a solution of one of the said organic compounds may be applied to the extruded product, which is then heated to 80-150 DEG C.  In making varnishes, paints, protective and waterproof coating compositions, the solvent mixtures used may include toluol, xylol, p-cymene, solvent naphtha, hydrogenated naphthalene, p-methyl-isopropylbenzene, di-(chlorethyl)-ether, tricresyl phosphate, and the stearic ester of glycol butyl ether. Specifications 461,631, 490,824, 491,015, and 491,141 are referred to.  The Specification as open to inspection under Sect. 91 refers also to the use of diphenyl- and ditolyl-guanidine, and condensation products of ammonia or aniline and aldehydes.  This subject-matter does not appear in the Specification as accepted.