ISOMERIZATION OF ENDO ISOMER OF PENTACYCLOPENTADECENE TO EXO ISOMER, MIXTURE OF PENTACYCLOPENTADECENE ISOMERS AND PRODUCTION THEREOF

摘要

PURPOSE:To obtain a mixture of the subject isomers rich in exo isomer capable of further improving the heat-resistance and mechanical strength of a cycloolefin random copolymer by contacting an endo isomer of the subject compound with a solid acid catalyst, thereby isomerizing to exo isomer. CONSTITUTION:The endo isomer II of a pentacyclo[4 . 7. 0.1<2.> <5> . 0<8.> <13> .1<9>,<12>]pentadecene-3 expressed by formula I [R<1> to R are H, hydrocarbon group or halogen; R<11> (or R<12>) and R<13> (or R<14>) may together form a monocyclic or polycyclic group] or a mixture of the endo isomer II and the exo isomer III and containing >=85mol% of the endo isomer II is brought into contact with a solid acid catalyst to isomerize the endo isomer II into the exo isomer III to obtain an isomer mixture having a II/III molar ratio of 80/20 to 0/100. A cycloolefin random copolymer produced by the copolymerization of the mixture with ethylene has remarkably improved heat-resistance and mechanical strength.