Isomerization manner and aromatic content norbornenes isomer blend and that production manner null to exo product of aromatic content norbornenes ended

摘要

PURPOSE: To produce an isomer mixture capable of giving a copolymer having excellent heat-resistance and mechanical strength when copolymerized with ethylene by contacting an endo isomer in a mixture of aromatic group-containing norbornene compound isomers with a solid acid catalyst, thereby isomerizing the endo isomer to exo isomer. ;CONSTITUTION: An endo isomer of formula II (X¹ is group of formula III) of a compound of formula I [(p) is 0 or integer of ≥1; (q) and (r) are 0-2; R¹ to R¹⁵ are H, halogen, aliphatic, alicyclic or aromatic hydrocarbon group or alkoxy; R⁵ (or R⁶) and R⁹ (or R⁷) may be bonded with each other directly or interposing a 1-3C alkylene] is made to contact with a solid acid catalyst (e.g. an acidic metal oxide) at -5 to +150°C (preferably 0-50°C) to isomerize the endo isomer to an exo isomer expressed by formula IV. When an isomer mixture of the compound of formula I containing ≥85mol% of the endo isomer is made to contact with a solid acid catalyst, the endo/exo molar ratio can be changed to 80/20 to 0/100.;COPYRIGHT: (C)1993,JPO&Japio