| 摘要 |
<p>1,234,873. Bonding rubber to metal. ASAHI KASEI KOGYO K.K. 4 Feb., 1969 [7 Feb., 1968], No. 5848/69. Heading B5N. Ethylene-propylene rubbers, comprising 20- 99 mol. per cent propylene to 80-1 mol. per cent ethylene with 0À1-20 mol. per cent termonomer per 100 mol. per cent olefins, are bonded to metal wire by vulcanizing in the presence of sulphur, vulcanization accelerators and either (i) a halogenated alkylphenol-formaldehyde resin; or (ii) an alkylphenol-formaldehyde resin and a metal chloride, e.g. SnCl 2 , ZnCl 2 , FeCl 3 , to confer adhesive properties. Said additives are incorporated in the rubber which is either bonded directly to the metal or interposed as a sheet or solution in hydrocarbon solvent between the untreated rubber and the metal, e.g. by wrapping or coating the wire, before bonding. Vulcanization may be by pressing or injection moulding at 100-200‹ C. The metal may be iron, copper, tin or bronzegalvanized steel. Specified termonomers in the ethylene-propylene rubbers are cyclopentadiene, 1,4 - hexadiene, methyltetrahydroindene, bicyclopentadiene and 5 - methylene - 2 - norbornene. The rubber compositions may contain conventional additives, e.g. carbon black, fillers, plasticizers softeners, pigments and antioxidants, and also polychloroprene or chlorinated polyethylene to improve bonding. Suitable proportions for the additives in the composition are given.</p> |
