| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an aromatic polysulfone resin excellent in toughness and suitable as a raw material of membranes including a porous membrane. <P>SOLUTION: The aromatic polysulfone resin has reduced viscosity of 0.55-0.65 dL/g, preferably 0.58-0.62 dL/g, a number-average molecular weight (Mn) of 22,000 or higher, preferably 23,500 or higher, and a ratio of weight-average molecular weight (Mw) to number-average molecular weight (Mn) of 2.54 or less, preferably 2.50 or less. <P>COPYRIGHT: (C)2011,JPO&INPIT |
