Mitsui Chemicals, Inc.

Shinya Tanaka

Munehito Funaya

Atsushi Sakuma

Akiko Matsumoto

Ikuko Ebisawa

Hirokazu Tanaka

Shinsuke Kinoshita

Masayoshi Yamaguchi

Koji Matsunaga

Makoto Egawa

Tomohiro Abe

Koya Yoshimoto

Ikuo Akai

[Problem to be solved] There is provided a process for producing an olefin polymer that is capable of producing an olefin polymer having high heat resistance and high molecular weight with excellent catalytic activity. [Solution to problem] The process for producing an olefin polymer includes a step of polymerizing at least one olefin selected from ethylene and &#x3b1;-olefins having 4 to 30 carbon atoms in the presence of an olefin polymerization catalyst containing a transition metal compound represented by the general formula [I], the olefin polymer including constituent units derived from ethylene and &#x3b1;-olefins having 4 to 30 carbon atoms in a total amount between more than 50 mol % and not more than 100 mol %, 

Process for producing olefin polymer and olefin polymer

An object of the invention is to provide compositions which have low-temperature heat sealing properties, are free from stickiness, may achieve a heat seal strength controlled within a certain definite range when heat sealing takes place at low temperatures, have small changes in heat seal strength with time, and are such that in the packaging applications, the strength required to open the packages may be easily controlled within a certain definite range, and high-performance packages may be designed. The invention resides in a 1-butene.&#x3b1;-olefin copolymer composition including 99 to 1 parts by mass of at least one olefin polymer (X) selected from propylene polymers (X-1) and ethylene polymers (X-2), and 1 to 99 parts by mass of a 1-butene.&#x3b1;-olefin copolymer (Y) containing 0.1 to 30 mol % of one or more &#x3b1;-olefins selected from &#x3b1;-olefins and having a molecular weight distribution (Mw/Mn) of 1.0 to 3.5 [wherein the total of (X) and (Y) in the composition is 100 parts by mass].

1-butane-&#x3b1;-olefin copolymer composition

[Problem to be solved] There is provided a process for producing an olefin polymer that is capable of producing an olefin polymer having high heat resistance and high molecular weight with excellent catalytic activity. [Solution to problem] The process for producing an olefin polymer includes a step of polymerizing at least one olefin selected from ethylene and &#x3b1;-olefins having 4 to 30 carbon atoms in the presence of an olefin polymerization catalyst containing a transition metal compound represented by the general formula [I], the olefin polymer including constituent units derived from ethylene and &#x3b1;-olefins having 4 to 30 carbon atoms in a total amount between more than 50 mol % and not more than 100 mol %,  [in the formula [I], R, Rand Rto Rare each independently a hydrogen atom, a hydrocarbon group or the like; Ris a hydrocarbon group or the like; Ris a hydrogen atom; M is a transition metal of Group IV; Q is a halogen atom or the like; and j is an integer of 1 to 4].

1-butene &#x3b1;-olefin copolymer composition

There is provided a process for producing an olefin polymer that is capable of producing an olefin polymer having high heat resistance and high molecular weight with excellent catalytic activity. The process for producing an olefin polymer includes a step of polymerizing at least one olefin selected from ethylene and &#x3b1;-olefins having 4 to 30 carbon atoms in the presence of an olefin polymerization catalyst containing a transition metal compound represented by the general formula [I], the olefin polymer including constituent units derived from ethylene and &#x3b1;-olefins having 4 to 30 carbon atoms in a total amount between more than 50 mol % and not more than 100 mol %,  [in the formula [I], R, Rand Rto Rare each independently a hydrogen atom, a hydrocarbon group or the like; Ris a hydrocarbon group or the like; Ris a hydrogen atom; M is a transition metal of Group IV; Q is a halogen atom or the like; and j is an integer of 1 to 4].

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Ichihara, Japan

Shinya Tanaka