Sumitomo Chemical Company, Limited

Koji Ishiwata

Yasutoyo Kawashima

Yoshinobu Nozue

Kazuo Takaoki

Kazuyuki Ito

Kohei Ueda

Masato Takano

Provided is a polymer having a sharp melting peak and allowing easy adjustment of the melting peak temperature. Specifically provided is a polymer having two or more kinds of constitutional units containing an alkyl group having 14 or more and 30 or less carbon atoms, wherein the proportions of the number of the two or more kinds of constitutional units containing an alkyl group having 14 or more and 30 or less carbon atoms are each 20% or more, with respect to 100% of the total number of all constitutional units containing an alkyl group having 14 or more and 30 or less carbon atoms. An enthalpy of fusion of the polymer observed within a temperature range of 10&#xb0; C. or higher and lower than 60&#xb0; C. in differential scanning calorimetry is 30 J/g or more.

Polymer, molded body, foam, resin composition, and production method for polymer

A resin composition contains a polymer whose enthalpy of fusion (&#x394;H) observed within a temperature range of 10&#xb0; C. or higher and lower than 60&#xb0; C. in differential scanning calorimetry is 30 J/g or more; and a low-molecular-weight compound whose enthalpy of fusion (&#x394;H) observed within a temperature range of 0&#xb0; C. or higher and lower than 100&#xb0; C. in differential scanning calorimetry is 30 J/g or more and whose molecular weight is 2000 or lower. A content of the low-molecular-weight compound is 3 parts by weight to 1000 parts by weight with respect to 100 parts by weight of the total amount of polymer components contained in the resin composition except the low-molecular-weight compound.

Resin composition and use thereof

A method for producing an olefin block polymer, the method includes: polymerizing olefin using a polymerization catalyst (X), a polymerization catalyst (Y), and an organometallic compound (C) having an atom of any of Groups 2, 12, and 13 of the periodic table of the elements, the organometallic compound (C) excluding an activating co-catalyst agent (B), wherein: the polymerization catalyst (X) is formed by bringing a transition metal compound (A-X) represented by a general formula (1-X) into contact with an activating co-catalyst agent (B); and the polymerization catalyst (Y) is formed by bringing a transition metal compound (A-Y) represented by a general formula (1-Y) into contact with the activating co-catalyst agent (B).  [Chem. 2](MLXE)&#x2003;&#x2003;(1-Y)

Method for producing olefin block polymer using plurality of types of transition metal catalysts

A method for producing an olefin block polymer, the method including: polymerizing olefins using a polymerization catalyst (X) and an organometallic compound (C) containing an atom of any of Groups 2, 12, and 13 of the periodic table of the elements, the organometallic compound (C) excluding an activating co-catalyst agent (B), wherein the polymerization catalyst (X) is formed by bringing a transition metal compound (A) into contact with the activating co-catalyst agent (B), the transition metal compound (A) is represented by the following general formula (1), and the activating co-catalyst agent (B) is selected from among an organoaluminumoxy compound (B-1), an organoboron compound (B-2), a zinc co-catalyst component (B-3), and ion-exchange layered silicate (B-4). 

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Osaka, Japan

Koji Ishiwata