The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 07, 2017
Filed:
Sep. 14, 2010
Applicants:
Yusaku Kohinata, Tokyo, JP;
Hiroshi Harada, Tsukuba, JP;
Inventors:
Yusaku Kohinata, Tokyo, JP;
Hiroshi Harada, Tsukuba, JP;
Assignee:
SUMITOMO CHEMICAL COMPANY, LIMITED, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G 75/20 (2016.01); C08L 81/06 (2006.01); B01D 67/00 (2006.01); B01D 69/02 (2006.01); B01D 71/68 (2006.01); C08J 5/18 (2006.01);
U.S. Cl.
CPC ...
C08L 81/06 (2013.01); B01D 67/0009 (2013.01); B01D 67/0095 (2013.01); B01D 69/02 (2013.01); B01D 71/68 (2013.01); C08J 5/18 (2013.01); B01D 2323/34 (2013.01); B01D 2325/20 (2013.01); C08J 2381/06 (2013.01);
Abstract
According to the present invention, an aromatic polysulfone resin is offered which is suitable as film material, especially in porous membranes. The aromatic polysulfone resin of the present invention has a reduced viscosity of 0.55-0.65 dL/g, and preferably 0.58-0.62 dL/g, number average molecular weight (Mn) of 22000 or more, and preferably 23500 or more, and a value of the ratio of weight average molecular weight (Mw) relative to number average molecular weight (Mn) of 2.54 or less, and preferably 2.50 or less.