Patent ID: 6284857
Filing Date: 2001-09-04
Classification: C08F

Abstract:
A propylene polymer having such properties that:a melt flow rate (MFR) of said polymer at 230.degree. C. under a load of 2.16 kg is in the range of 0.1 to 500 g/10 min,a pentad isotacticity M.sub.5 obtained from the following formula (1) using absorption intensity Pmmmm and Pw in a .sup.13 C-NMR spectrum of a boiled heptane-insoluble component contained in said polymer is in the range of 0.970 to 0.995,a pentad tacticity M.sub.3 obtained from the following formula (2) using absorption intensity Pmmrm, Pmrmr, Pmrrr, Prmrr, Prmmr, Prrrr and Pw in a .sup.13 C-NMR spectrum of a boiled heptane-insoluble component contained in said polymer is in the range of 0.0020 to 0.0050, anda crystallinity of a boiled heptane-insoluble component contained in said polymer is 70 to about 79.3%; ##EQU12##whereinPmmmm is absorption intensity of methyl groups present in the third unit among continuous five propylene units which are bonded to each other with meso form, andPw is absorption intensity of all methyl groups in a propylene unit; ##EQU13##whereinPmmrm is absorption intensity of methyl groups present in the third unit among continuous five propylene units represented by ##STR36##in which .right brkt-bot. and .right brkt-top. are each a propylene unit,Pmrmr is absorption intensity of methyl groups present in the third unit among continuous five propylene units represented by ##STR37##in which .right brkt-bot. and .right brkt-top. are each a propylene unit,Pmrrr is absorption intensity of methyl groups present in the third unit among continuous five propylene units represented by ##STR38##in which .right brkt-bot. and .right brkt-top. are each a propylene unit,Prmrr is absorption intensity of methyl groups present in the third unit among continuous five propylene units represented by ##STR39##in which .right brkt-bot. and .right brkt-top. are each a propylene unit,Prmmr is absorption intensity of methyl groups present in the third unit among continuous five propylene units represented by ##STR40##in which .right brkt-bot. and .right brkt-top. are each a propylene unit,Prrrr is absorption intensity of methyl groups present in the third unit among continuous five propylene units represented by ##STR41##in which .right brkt-bot. and .right brkt-top. are each a propylene unit, andwherein said propylene polymer contains 10-10,000 ppm of polymer comprising constituent units derived from a compound represented by the following formula (i) or (ii): ##STR42##wherein X is a cycloalkyl group, an aryl group or ##STR43##M is carbon or silicon, R.sup.1 and R.sup.2 are each a hydrocarbon group, and R.sup.3 is hydrogen or a hydrocarbon group.