Patent GB-429764-A (GB)
Title: New film-forming compositions
IPC: C09D115/02
Filed: 1933-12-06
Abstract: Oily products are obtained by the interaction of sulphur with aliphatic homologues of benzene in the presence of aluminium chloride.  According to an example, toluene, sulphur and aluminium chloride are refluxed until evolution of hydrogen sulphide and hydrochloric acid has ceased.  Excess aluminium chloride is removed with hot water and excess toluene is distilled off, yielding a yellow oil having a boiling point of 150--230 DEG  C. under 3 mm. pressure. In another example, xylene, sulphur, and aluminium chloride are treated in the same way.  The treatment of ethylbenzene is referred to.  These oils are incorporated with chlorinated rubber.ALSO:Chlorinated rubber is incorporated with the oily products obtained by the interaction of sulphur and an aliphatic homologue of benzene in the presence of aluminium chloride in the manufacture of varnishes, impregnating-compositions, &c.  The proportion of the oily product may be 5--100 per cent of the chlorinated rubber.  Compatible resins, such as ester gum, polymerization products of cumarone or cyclohexanone, solubilized copals, alkyd resins, fillers and colouring matters may be added. According to an example, 25 parts of chlorinated rubber of 64 per cent chlorine content, and 6 parts of the oily product are dissolved in 54 parts of xylene, or a mixture of 18 parts of toluene and 36 parts of xylene, and homogenized with 15 parts of titanium dioxide to form a varnish for protecting metal surfaces from the action of water.  The oily product is made by refluxing 1000 parts of toluene, 330 parts of sulphur, and 80 parts of aluminium chloride until evolution of hydrogen sulphide and hydrochloric acid has ceased, eliminating excess aluminium chloride with hot water, removing the water and distilling off the excess toluene.ALSO:Chlorinated rubber is incorporated with the oily products obtained by the interaction of sulphur with an aliphatic homologue of benzene in the presence of aluminium chloride, to obtain a product resistant to chemicals, water, salt solutions, &c.  These may be incorporated as such to form plastic masses, or they may be dissolved, e.g. in liquid hydrocarbons to yield solutions for the manufacture of films, threads, coatings or impregnating compositions. Compatible resins, such as ester gum, polymerization products of cumarone or cyclohexanone, solubilized copals, alkyd resins, fillers, and colouring matters, may be added.  The proportion of the oily product may be 5-100 per cent of the chlorinated rubber, the higher proportions yielding softer compositions.  According to an example, 50 parts of chlorinated rubber of 63 per cent chlorine content are worked warm with 30 parts of a low-melting polymerization product of cumarone, and 20 parts of an oil obtained by refluxing 1000 parts of toluene, 300 parts of sulphur and 80 parts of aluminium chloride until evolution of hydrogen sulphide and hydrochloric acid has ceased, pouring into hot water to eliminate excess aluminium chloride, separating from the water, and distilling off excess toluene. Other examples describe the making of varnishes, and also the making of oily products by the action of sulphur on xylene.