US 7,067,604 B2 · 1-butene polymer and molded product consisting of the polymer

Abstract

1-butene based polymer satisfying following requirements (1″) to (4″) provides formed product having low stickiness, superior flexibility and transparency. (1″) Crystalline resin having melting point (Tm−P), not observed or in the range of 0 to 100° C., wherein said melting point defined as the peak top of the peak observed in the highest temperature zone of the melting heat absorption curve obtained by heating a sample of said polymer at a rate of 10° C./minute using Differential Scanning Calorimeter (DSC), after melting said sample in advance at 190° for 5 minutes under nitrogen atmosphere, followed by cooling it to −10° C. at a rate of 5° C./minutes, and keeping it at −10° C. for 5 minutes. (2″) Stereoregularity index {(mmmm)/(mmrr+rmmr)} is at most 20. (3″) Molecular weight distribution (Mw/Mn) measured by Gel Permeation Chromatography (GPC) method is at most 4.0. (4″) Weight average molecular weight (Mw) measured by GPC method is in the range of 10,000 to 1,000,000.

Claims23

Dependent claims

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.

Dependencies are inferred from the claim text.

1-butene polymer and molded product consisting of the polymer

Life of this patent

1-butene polymer and molded product consisting of the polymer

Life of this patent

Abstract

Claims23