PROPYLENE COPOLYMER

摘要

PCT No. PCT/JP91/00466 Sec. 371 Date Nov. 12, 1991 Sec. 102(e) Date Nov. 12, 1991 PCT Filed Apr. 9, 1991 PCT Pub. No. WO91/15523 PCT Pub. Date Oct. 17, 1991.A substantially syndiotactic propylene copolymer which comprises propylene and at least one cyclic diolefin having 6 to 25 carbon atoms or an alkadiene having 6 to 25 carbon atoms and at least one terminal double bond, in the 13C-NMR spectrum of the copolymer measured in a 1,2,4-trichlorobenzene solution, a peak intensity observed at about 20.2 ppm as the reference of tetramethylsilane at 0.0 ppm being 0.5 or more of the total peak intensity attributed to methyl groups of propylene; the content of the cyclic diolefin or the alkadiene being from 0.01 to 20 mol %; the intrinsic viscosity [ eta ] of the copolymer measured in a tetralin solution at 135 DEG C. being from 0.1 to 10 dl/g. This copolymer can contain an alpha -olefin other than propylene, particularly ethylene.