| 摘要 |
<p>1,223,727. Laminates. PYRENE CO. Ltd. 12 July, 1968 [26 July, 1967], No. 33412/68. Addition to 1,144,844. Heading B5N. [Also in Division C3] Elastomeric materials are bonded to metal surfaces consisting predominantly of iron, zinc or aluminium by treating the surface with an aqueous solution containing chromic acid and phosphoric acid, adjusting the water content of the coating if not at least 4% to at least 4% by weight, and placing an elastomeric material in contact with the surface bearing the moist coating and bonding the elastomeric material to the surface by the application of heat and pressure. The elastomeric materials include natural and synthetic rubbers such as sulphuric acidtreated natural rubber, neoprene rubber, styrene-butadiene rubber, butyl rubber, ethylenepropylene-diene polymers. The coating solution may also comprise fillers such as titanium dioxide, colloidal silica, attapulcus clay, aluminium metal powder and zinc metal powder. Metal salts of organic fatty acids such as zinc stearate, lead acetate and sodium acetate may also be used. The coating solution may be applied by roller-coating, spraying, flowing or immersion. The process may be used to form laminates of an elastomeric material between two metal surfaces, or to form laminates of alternating layers of elastomeric material and metal.</p> |
