Sumitomo Chemical Company, Limited

Toru Onodera

Shigeru Sasaki

Daizaburo Yashiki

Takashi Kamikawa

Susumu Kanzaki

Noriyuki Hida

Takitaro Yamaguchi

Hidenaka Tanaka

Ryuji Ohhashi

This heterophasic propylene polymerization material comprises a propylene copolymer (I), an ethylene-&#x3b1;-olefin copolymer (II-1), and an ethylene-&#x3b1;-olefin copolymer (II-2), wherein the contained amount of a monomeric unit derived from an olefin other than propylene in the propylene copolymer (I) is not less than 0.05 wt % but less than 10 wt %, the limiting viscosity [&#x3b7;]of the propylene copolymer (I) is less than 1.50 dL/g, the contained amount of a monomeric unit derived from ethylene in the ethylene-&#x3b1;-olefin copolymer (II-2) is 10-30 wt %, and the limiting viscosity of the ethylene-&#x3b1;-olefin copolymer (II-2) is higher than that of the ethylene-&#x3b1;-olefin copolymer (II-1).

Heterophasic propylene polymerization material

There is provided a nonaqueous electrolyte solution for the sodium secondary battery including a sodium salt, a compound having a sulfur-oxygen bond, and a nonaqueous solvent in which an amount of the compound having the sulfur-oxygen bond is in a rage of 0.05% by weight or more and 10% by weight or less with respect to the nonaqueous electrolyte solution. According to the present invention, the nonaqueous electrolyte solution for the sodium secondary battery and the sodium secondary battery which have excellent charge-discharge cycle characteristics can be provided and is useful industrially.

Nonaqueous electrolyte for sodium secondary battery and sodium secondary battery

A block copolymer comprising at least one segment having an acid group which is represented by the following formula (1) and at least one segment substantially free from acid groups which comprises repeating units represented by the following formula (2) is provided: (wherein, m represents an integer of 10 or more, Ar, Arand Arrepresent each independently a divalent aromatic group which is optionally substituted by an alkyl group having 1 to 10 carbon atoms, alkoxy group having 1 to 10 carbon atoms, aryl group having 6 to 10 carbon atoms or aryloxy group having 6 to 10 carbon atoms, at least one of Arand Arhaving an acid group, and Armay have an acid group or may be free from acid groups. Y represents &#x2014;CO&#x2014; or &#x2014;SO&#x2014;, and Y's may be different from each other.) (wherein, n represents an integer of 10 or more, Arand Arrepresent each independently a divalent aromatic group which is optionally substituted by an alkyl group having 1 to 10 carbon atoms, alkoxy group having 1 to 10 carbon atoms, aryl group having 6 to 10 carbon atoms, aryloxy group having 6 to 10 carbon atoms or flouro group. Z represents &#x2014;CO&#x2014; or &#x2014;SO&#x2014;, and Z's may be different from each other). The block copolymer exerts more excellent performances as the polymer electrolyte in fuel cells and the like.

Block copolymers and use thereof

An aromatic-polyether-type ion conductive polymer membrane having improved mechanical strength is provided. An aromatic-polyether-type ion-conductive ultrahigh molecular weight polymer having an ion exchange capacity of 0.1 meq/g or higher and a structure comprising an aromatic-polyether-type ultrahigh molecular weight polymer in which an acid group introduced, said aromatic-polyether-type ultrahigh molecular weight polymer having at least one structural unit selected from those represented by the following formulas (1) and (2) and the sum of the number a of the structural unit of the formula (1) and the number b of the structural unit of the formula (2) being 2 or larger:Ar&#x2014;O&#x2014;Ar&#x2003;&#x2003;(1)Ar&#x2014;O&#x2014;Ar&#x2003;&#x2003;(2).

Aromatic-polyether-type ion-conductive ultrahigh molecular weight polymer, intermediate therefor, and process for producing these

A block copolymer comprising at least one segment having an acid group and at least one segment substantially free from acid groups is provided wherein the segment substantially free from acid groups contains a structure of the following general formula (1):Ar&#x2014;Z&#x2014;Ar&#x2014;O&#x2014;Ar&#x2014;O&#x2003;&#x2003;(1)(wherein, m represents an integer of 10 or more, Ar, Arand Arrepresent mutually independently a divalent aromatic group which may be substituted by an alkyl group having 1 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, an aryl group having 6 to 10 carbon atoms or an aryloxy group having 6 to 10 carbon atoms, and Z represents &#x2014;CO&#x2014; or &#x2014;SO&#x2014;, each Z in the segments representing independently &#x2014;CO&#x2014; or &#x2014;SO&#x2014;). The block copolymer exhibits more excellent performances as a polymer electrolyte for fuel cells or the like.

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Tsukuba, Japan

Toru Onodera