Patent ID: 7067604
Filing Date: 2006-06-27
Classification: C08F,C08L

Abstract:
1. A 1-butene based polymer satisfying (5) and (6): (5) it is a 1-butene homopolymer or 1-butene based copolymer obtained by copolymerizing 1-butene and ethylene and/or α-olefin having 3 to 20 carbon atoms (except 1-butene), which has at least 90 mol % of structural unit originated from 1-butene, and (6) its Type II crystal fraction (CII) obtained by X-ray diffraction analysis is at most 20%, when said analysis is made after melting a sample of said polymer in advance at 190° C. for 5 minutes and rapidly solidifying it by cooling it with ice water, followed by keeping it at room temperature for 1 hour, and which is produced using a metallocene catalyst.