| 摘要 |
1,159,184. Coated metal supports. CRYLOR. 14 June, 1967 [17 June, 1966], No.27511/67. Heading B2K. An element, which can be used for heat transfer by radiation, comprises a metal support having a coating formed by the pyrolysis of an acrylonitrile homopolymer, copolymer, graft copolymer or mixtures of polymers containing at least 85 % by wt. of acrylonitrile and up to 15% of one or more ethylenic non-halogenated compounds copolymerisable with acrylonitrile, which contains a metal salt. The metal salt may be a salt of a divalent metal which is capable of forming coordination complexes e.g. a salt of copper, nickel, cobalt or cadmium. The coating may have a total emission factor of at least 0.90. The element may be made by depositing on the surface of the metal support e.g. by brushing or spraying, a layer of a solution of the polymer and of the salt in a common solvent, examples of which are given, eliminating the solvent, and pyrolysing the resulting film e.g. by heating the coated support at a temperature between 150 and 400‹C for more than 10 hours. The film-forming and pyrolysis operations may be repeated one or more times. The support may be of pure metal or a metal alloy e.g. steel, copper or its alloys, and may be of plane or cylindrical form of which the interval surface may be coated to produce a heating roller as described in French Specification No. 1,443,153. The surface of the support may be polished or roughened. |
