Central Glass Company, Limited

Hiroki Uoyama

Kazuhiro Yamanaka

Takeshi Suda

Tsuyoshi Ogawa

Disclosed are a diamine represented by the following formula, a polyimide and a polyamide using the same as the raw material, a cyclized product thereof, and a method for producing the same. In the formula, A represents a single bond, an ether bond, a sulfide bond, CO, CH, SO, SO, C(CH), NHCO or C(CF), or a bivalent group having an aliphatic ring, a hetero ring or an aromatic ring, Rrepresents a Calkyl group or a halogen group, and each of 'a' and 'b' independently represents an integer of 0-2, and 1&#x2266;a+b&#x2266;4. The polyimide and the polyamide are a fluorescent polyimide and a fluorescent polyamide that are easily soluble in organic solvents to the extent that they can be formed into a film by a wet process when making an optical device, that have heat resistance and strength when formed into a film, and that have superior fluorescent characteristics. 

Hexafluoroisopropanol group-containing diamine, polyimide and polyamide using same, cyclized product thereof, and method for producing same

[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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Saitama, Japan

Hiroki Uoyama