| 摘要 |
<p>1,172,453. Treating polyolefins. IMPERIAL CHEMICAL INDUSTRIES Ltd. 2 Feb., 1968 [17 Feb., 1967], No. 7742/67. Heading C3P. A method for improving the adhesion between a polyolefin surface and a coating applied thereto comprises incorporating within the polyolefin a granular filler having a particle size of 0.1 to 300 microns and subsequently exposing the surface of the polyolefin to treatment with one or more etching fluids containing chromic acid. Preferred polyolefins are polymers and copolymers of propylene and 4-methylpentene-1, particularly sequential propylene/ethylene copolymers. The filler may be titanium dioxide, mica, talc, silica, magnesium carbonate, calcium carbonate, dolomite, zinc sulphide, sodium bicarbonate, alumina, zinc oxide, calcium oxide, polybutadiene, polyisoprene or methacrylate/ styrene/butadiene copolymers. The etching fluid is preferably chromic or chromic/phosphoric acids, and treatment may be preceded by a trichloroethylene vapour etch. The treated articles may be sensitized with stannous chloride, activated with palladium chloride, and subjected to electroless and finally electroplating.</p> |
