| 摘要 |
Nitrocellulose lacquer contains, as an anti-static agent, an ammonium or a primary or secondary alkanolamine salt of either an alkyl ester of an inorganic oxo-acid in which the alkyl group has at least 8 carbon atoms, or an organic sulphonic acid having an alkyl substituent group containing at least 8 carbon atoms. Specified anti-static agents are ethanolamine lauryl sulphate, ammonium lauryl sulphate, ammonium cetyl sulphate, ammonium stearyl sulphate, ethanolamine dodecylbenzene sulphonate and ethanolamine stearyl sulphate. The lacquer, which term includes the mixture of non-volatile components to be dissolved in a olvent to form a lacquer solution, may contains 5-20 parts of anti-static agent per 100 parts of nitrocellulose. Anti-static agents of low solubility may be incorporated in the lacquer by mixing the agent with water, and dispersing the mixture in lacquer solution to give an emulsion of water-in-oil type. Lacquer compositions exemplified contain isopropanol-wet nitrocellulose; dicyclohexyl phthalate and/or tricyclohexyl citrate; clay; isocyanate solution (made by reacting hexamethylene diisocyanate with water), at least one of the above antistatic agents, and one or more of triacetin, ester gum resin, maleic modified ester gum resin, and o/p-N-ethyltoluene sulphonamide. The lacquers are used in coating plastic films (Division B2). Specification 985,291 is referred to.ALSO:A plastic, e.g. polypropylene, film is coated, on at least one surface, with a nitrocellulose lacquer containing an anti-static agent comprising an ammonium or a primary or secondary alkanolamine salt of either an alkyl ester of an inorganic oxo-acid in which the alkyl group has at least 8 carbon atoms or an organic sulphonic acid having an alkyl substituent group containing at least 8 carbon atoms. The films are heat-sealable and have improved slip properties. In examples, polypropylene films, which may have been treated by corona discharge, are coated with lacquer compositions containing isopropyl-wet nitrocellulose, dicyclohexyl phthalate and/or tricyclohexyl citrate, clay, isocyanate solution, one or more of triacetin, ester gum resin, maleic modified ester gum resin and o/p-N-ethyltoluene sulphonamide, and at least one antistatic agent comprising ethanolamine lauryl sulphate, ammonium lauryl sulphate, ammonium cetyl sulphate, ammonium stearyl sulphate, ethanolamine dodecylbenzene sulphonate and ethanolamine stearyl sulphate. Specification 985,291 is referred to. |
