| 摘要 |
1,186,362. Acrylonitrile terpolymer films. IMPERIAL CHEMICAL INDUSTRIES Ltd. 5 March, 1968 [10 March, 1967; 20 Sept., 1967], Nos. 42895/67 and 42900/67. Heading B5B. [Also in Division C3] A film or fibre is made from a random copolymer of 50% to 90% molar of acrylonitrile and 50% to 10% molar of at least one aromatic olefin, the sum of these percentages being 100%, into which is incorporated as copolymerized units at least one monomer selected from maleimide and its N-substituted derivatives and norbornene and its derivatives including methylene norbornane in a molar amount less than that of the aromatic olefin. In the examples, films prepared by solvent casting a terpolymer of acrylonitrile, N-ochlorophenylmaleimide and styrene, or alphamethylstyrene, are uniaxially or biaxially oriented. The uniaxially oriented films may be fibrillated.
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