Central Glass Company, Limited

Takeshi Suda

Kazuhiro Yamanaka

Hiroki Uoyama

Hiroshi H Eguchi

Junya Nakatsuji

Tsuyoshi Ogawa

Katsuhiro Akiyama

A composition containing a metal compound and a siloxane compound (A) represented by general formula (1): wherein X is represented by general formula X1 or X2: wherein the number of X1 is 1-8; the number of X2 is 0-7; the sum of the number of X1 and the number of X2 is 8; Rto Rrepresent a hydrogen atom, a Calkyl group, alkenyl group, alkynyl group, or a Caryl group, a hydrogen atom thereof optionally being substituted by a fluorine atom; Rrepresents a Calkyl group, alkenyl group, alkynyl group or aryl group, a hydrogen atom thereof being optionally substituted by a fluorine atom, a carbon atom being optionally substituted by an oxygen atom or a nitrogen atom; Rrepresents a hydrogen atom, a vinyl group or an allyl group; m and n represent an integer of 1-4; and 3&#x2266;m+n.

Siloxane-based composition and cured product thereof, and use therefor

[Problem] Diamine and carboxylic dianhydride for polymerizing a hexafluoroisopropylidene group-containing polyimide are limited in chemical structure when developed into a polyimide membrane, so that it is difficult to design a chemical structure with consideration paid to the strength and separation performance of a gas separation membrane. A gas separation membrane easily soluble in an organic solvent, excellent in formability so as to be readily usable for a gas separation membrane, and excellent in gas separation performance is obtained. [Solution] A gas separation membrane, including: 

Gas separation membrane

A gas separation membrane having a polyimide structure. The polyimide structure is provided to contain a repeating unit represented by general formula (1):   

A gas separation membrane having a polyimide structure. The polyimide structure is provided to contain a repeating unit represented by general formula (1):   (In the formula, Ris a single bond, an oxygen atom, a sulfur atom, &#x2014;SO&#x2014; group, &#x2014;CH&#x2014; group, &#x2014;C(&#x2550;O)&#x2014; group, &#x2014;C(CH)&#x2014; group, &#x2014;C(CH)(CHCH)&#x2014; group, &#x2014;C(CF)&#x2014; group or a divalent organic group formed by removing any two hydrogen atoms from a C-Calicyclic hydrocarbon or C-Caromatic hydrocarbon. Ris a C-Calkyl group. 'ac' and 'ad' mutually independently represent an integer of 0 to 2 such that 1&#x2266;ac+ad&#x2266;4. HFIP represents a &#x2014;C(CF)OH group. A straight line that intersects with a wiggly line represents a bonding moiety).

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Fujimino, Japan

Takeshi Suda