| 摘要 |
PURPOSE: To obtain a new compound capable of providing an unsaturatedα- olefin-polyene copolymer, excellent in weather, heat and ozone resistances and having a high vulcanization rate by copolymerization thereof with anα-olefin. CONSTITUTION: This compound is expressed by formula I [(n) is 1-5; R<1> to R<5> are each H or a 1-5C alkyl, with the proviso that R<3> to R<5> are not simultaneously H], e.g. 5-(1,5-dimethyl-1,4-hexadienyl)-2-norbornene. The compound is obtained by reacting cyclopentadine with a chain polyene compound having a conjugated diene of formula II such as 3,7-dimethyl-1,3,6-octatriene, preferably at 100-200 deg.C temperature under 5-70kg/cm<2> pressure usually for 0.5-30hr. Furthermore, the cyclopentadiene is used in an amount of 0.5-3 pts.wt. based on 1 pt.wt. compound of formula II.
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