Mitsui Chemicals, Inc.

Hirokazu Tanaka

Munehito Funaya

Atsushi Sakuma

Akiko Matsumoto

Ikuko Ebisawa

Shinsuke Kinoshita

Shinya Tanaka

Tetsuya Nakamura

Hidetake Nakano

Masahiko Okamoto

Takayuki Uekusa

Yoshisada Tamo

Disclosed is a polyamide resin composition including 50% to 99% by mass of a polyamide (P) and 1% to 50% by mass of an acid-modified polyolefin (Q) satisfying the following requirements (1) to (3). (1) A melt flow rate (MFR) as measured at 230&#xb0; C. under a load of 2.16 kg is 50 to 200 (g/10 min). (2) An acid modification amount is 0.1% to 2.0% by mass. (3) The acid-modified polyolefin (Q) includes a modified product (q1) of an elastomer including 10% to 95% by mole of an ethylene-derived skeleton unit, 0% to 80% by mole of a propylene-derived skeleton unit, and 3% to 40% by mole of a skeleton unit derived from an &#x3b1;-olefin having 4 to 8 carbon atoms (with a total amount of the ethylene-derived skeleton unit, the propylene-derived skeleton unit, and the skeleton unit derived from an &#x3b1;-olefin being 100% by mole), the elastomer being modified by maleic acid or an anhydride thereof.

Polyamide resin composition with high fluidity

[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

To provide a 4-methyl-1-pentene/olefin (co)polymer composition which is excellent in transparency and heat resistance and is excellent also in elongation and toughness and to provide a molded product composed of the composition, a film composed of the composition, which is excellent in transparency, heat resistance and dimensional stability and has been uniformly stretched, and a hollow molded product composed of the composition, which is excellent in transparency, heat resistance and toughness and is excellent also in dimensional stability. The 4-methyl-1-pentene (co)polymer composition of the present invention comprises a specific 4-methyl-1-pentene (co)polymer (A) and a specific 4-methyl-1-pentene/&#x3b1;-olefin copolymer (B) in a specific ratio.

4-methyl-1-pentene (co)polymer composition, and film and hollow molded product composed of the 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].

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

Hirokazu Tanaka