Patent GB-1056103-A (GB)
Title: Improvements in and relating to the treatment of siliceous materials
IPC: C04B26/32
Filed: 1963-07-11
Abstract: Siliceous material is treated to render it suitable for adhesion to silicone rubber by contacting the material with a mixture of halogeno silanes containing 10 to 85 mol per cent of silicon tetrahalide, 15 to 90 mol per cent of triorgano halogeno silane and 0 to 50 mol per cent of diorgano dihalogeno silane, in each of the silanes the organic substituents being a monovalent hydrocarbon radical or a halogeno hydrocarbon radical, and exposing the treated material to atmospheric moisture to effect hydrolysis of the silanes.  The halogen atoms of the silanes may preferably be bromine or chlorine atoms.  The silanes may be methyl-, ethyl-, vinyl- or phenylchlorosilanes, examples of which are given.  The treatment may be carried out by dissolving the silane mixture in an inert organic solvent to produce a solution containing 0.1. to 10 per cent by weight of the silanes. The solvent may be benzene, toluene, or a petroleum hydrocarbon. The mixture may be applied to the material in vapour form e.g. by placing a roll of material and the mixture in a closed bag.  The siliceous material may be glass or asbestos in the form of yarn, cloth, sheet, tape or fibres.  The treated material may be coated with a silicone rubber stock e.g. in the form of a dispersion or sheet, by calendering, pressing, dipping or flowing which is subsequently vulcanized.  The mixture of silanes may contain 20 to 60 mol per cent Si Cl4, 40 to 80 mol per cent (CH3)3 Si Co, and 0 to 30 mol per cent (CH3)2 Si Cl2.  The solution may be applied by spraying, flowing, dipping, brushing or calendering.ALSO:Siliceous material is treated to render it suitable for adhesion to silicone rubber by contacting the material with a mixture of halogens silanes containing 10 to 85 mol per cent of silicon tetrahalide, 15 to 90 mol per cent of triorgano halogenosilane and 0 to 50 mol per cent of diorgano dihalogeno silane, in each of the silanes the organic substituents being a monovalent hydrocarbon radical or a halogeno hydrocarbon radical, and exposing the treated material to atmospheric moisture to effect hydrolysis of the silanes.  The halogen atoms of the silanes may preferably by bromine or chlorine atoms.  The silanes may be methyl-, ethyl-, vinyl- or phenylchlorosilanes, examples of which are given.  The treatment may be carried out by dissolving the silane mixture in an inert organic solvent to produce a solution containing 0.1 to 10 per cent by weight of the silanes.  The solvent may be benzene, toluene, or a petroleum hydrocarbon.  The mixture may be applied to the material in vapour form e.g. by placing a roll of material and the mixture in a closed bag.  The siliceous material may be glass or asbestos in the form of yarn, cloth, sheet, tape of fibres and powders or particles of silica, quartz or glassfrit.  The treated material may be coated with a silicone rubber stock e.g. in the form of a dispersion or sheet, by calendering, pressing, dipping or flowing which is subsequently vulcanized.  The mixture of silanes may contain 20 to 60 mol per cent Si Cl4, 40 to 80 mol per cent (CH3)3 Si Cl, and 0 to 30 mol per cent (CH3)2 Si Cl2.  The solution may be applied by spraying, flowing, dipping, brushing or calendering.