发明名称 MATERIAL PENTRU INREGISTRAREA FRECVENTEI
摘要 <p>Compositions for formed frequency record carriers, particularly sound and video recordings, comprise (1) from 40 to 94% by weight of a copolymer of vinyl chloride with from 3 to 40% by weight of vinyl acetate; and (2) from 6 to 60% by weight of (a) one or more than one copolymer of vinyl chloride with from 1 to 20% by weight of an olefin of up to 10 carbon atoms or (b) polyvinylchloride having a k value of from 58 to 68, or (c) a mixture of (a) and (b) as defined above. The olefin may be propylene, isobutylene or 2-ethylhexene-1.</p>
申请公布号 RO79085(A) 申请公布日期 1982.06.25
申请号 RO19790096735 申请日期 1979.02.27
申请人 VYZKUMNY USTAV PRE PETROCHEMIU,CS 发明人 MACHO,VENDELIN,CS;BARTUSEK,ZDENEK,CS;KABICEK,VLADIMIR,CS;CERNY,KAREL,CS;PORUBSKY,JURAJ,CS
分类号 C08L27/06;G11B3/70;(IPC1-7):08L27/06 主分类号 C08L27/06
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