| 摘要 |
1,222,583. Antiozonants for rubber. WESTERN ELECTRIC CO. Inc. 24 April, 1968 [28 April, 1967], No. 19280/68. Headings C3P and C3Q. A natural or synthetic butadiene rubber contains as an antiozonant a di-(4-piperidyl) alkane of formula wherein n is an integer, preferably 1 to 10. |
