| 摘要 |
A fibrous material made from, for example, cotton, rayon, silk or nylon, is coated in the first place with a phenol-aldehyde resin, and in the second place with a chlorinated butyl rubber having a chlorine content of from 0.5 per cent by weight to not more than one atom of chlorine per molecule of multi-olefine in the butyl rubber. The chlorinated butyl rubber may be compounded with up to 10 parts of mould release agent, e.g. stearic acid, up to 150 parts of fillers such as carbon black, clay and silica, up to 50 parts of a basic metal compound such as zinc, calcium and magnesium oxide, and up to 5 parts of anti-oxidant such as phenyl b -naphthylamine per 100 parts by weight of rubber, and may be dissolved in a solvent such as kerosene, naphtha, mineral spirits, gasoline, hexane, heptane, benzene, toluene, ethyl chloride, chloroform, carbon tetrachloride and carbon disulphide. The chlorinated rubber may be prepared from butyl rubber containing 85-99.5 isobutylene with butadiene, isoprene, dimethyl butadiene and piperylene, by reacting a solution of the copolymer with chlorine, alkali-metal hypochlorites, sulphur chlorides, pyridinium chloride perchloride, N - chlorosuccinimide, phthalimide in gaseous form or as a solution in alkyl chloride and carbon tetrachloride. The phenolic compounds used to produce the resins may be phenol, cresol, phloroglucinol, xylenols, trimethyl phenols, mono- or di-chlorophenols, diamyl or diisopropyl, p-t-butyl and p-phenyl phenols, hydroquinone or resorcinol with aldehydes such as acetaldehyde, propionaldehyde and furfural. The fibrous material in the form of tyre cords, or fabrics are embedded in natural or synthetic rubbers and vulcanized, to yield material suitable for tyres or conveyer belts.ALSO:Fibrous materials, e.g. cotton, rayon, silk and nylon cords, are coated in the first place with a phenol-aldehyde resin and then further coated with a chlorinated butyl rubber having a chlorine content ranging from 0.5 per cent to not more than one atom of chlorine per molecule of multiolefine present. The chlorinated butyl rubber may be compounded with up to 10 parts of mould release agent, e.g. stearic acid, up to 150 parts of fillers, e.g. carbon black, clay and silica, up to 50 parts of a basic metal compound, e.g. zinc, calcium or magnesium oxide, and up to 5 parts of antioxidant, e.g. phenyl-b -naphthylamine, per 100 parts by weight of rubber, and it may be applied as a solution. The coated fabrics may be embedded in natural and synthetic rubbers and vulcanized to give products, with improved adhesion between the coated material and rubber, which may be used in constructing tyre carcasses or laminated conveyer belts.
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