| 摘要 |
<p>1,166,505. Rubber-polypropylene laminates. MITSUBISHI RAYON CO. Ltd. 22 Nov., 1966 [6 Dec., 1965], No. 52161/66. Heading B5N. [Also in Divisions C3 and D1] Polypropylene in the form of monofilaments, tapes, split fibres, knitted or woven fabrics, cords, films or sheets is bonded to rubber, e.g. natural rubber, using as adhesive a chlorinated, chlorosulphonated or sulphonated crystalline polyolefine. Preferably, the adhesive also comprises a dispersion of a resorcinol-formaldehyde resin in a rubber latex, e.g. a styrene-butadiene copolymer, a vinylpyridine-styrene-butadiene terpolymer, an acrylonitrile-butadiene copolymer or a polymer of monochlorobutadiene, an isocyanate, an epoxy resin or a natural or synthetic rubber. In a preferred method, the polypropylene or the rubber is coated with the adhesive prior to bonding; alternatively the adhesive is applied sequentially in the form of its separate components. Thermal stabilizers, e.g. dibutyl tin dilaurate or maleate or lead stearate, light stabilizers, e.g. benzophenone or carbon black, and viscosity modifiers, e.g. stearic acid or rosins may be present in the adhesive. The examples describe the bonding of woven polypropylene fabric to rubber under heat and pressure.</p> |
