Patent ID: 6800706
Filing Date: 2004-10-05
Classification: C08F,Y10S

Abstract:
A propylene polymer which satisfies the following requirements (1) to (4):(1) &Dgr;H&gE;0.45 Tm+22, wherein &Dgr;H is a heat of fusion (J/g) and Tm is a melting point (Â° C.) measured through differential scanning calorimetry; (2) 110 &lE;Tm&lE;140, wherein Tm is the melting point; (3) Th&lE;5, wherein Th is a half-value width (Â° C.) of the peak top of its elution curve, the elution curve being obtained in programmed temperature fractionation where a sample solution in o-dichlorobenzene is fractionated by raising the temperature from 0Â° C. to 135Â° C. at a heating rate of 40Â° C./hr; and (4) an intrinsic viscosity [&eegr;] of 0.5 to 5 dl/g when measured in a solvent of tetralin at 135Â° C.