Hydrophilic block copolymers and membranes prepared therefrom (i)
US-2015376340-A1 · Dec 31, 2015 · US
Aromatic polysulfone resin and membranes thereof
US9587112B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9587112-B2 |
| Application number | US-201013498877-A |
| Country | US |
| Kind code | B2 |
| Filing date | Sep 14, 2010 |
| Priority date | Sep 29, 2009 |
| Publication date | Mar 7, 2017 |
| Grant date | Mar 7, 2017 |
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Abstract
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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.
First claim
Opening claim text (preview).
The invention claimed is: 1. Aromatic polysulfone resin, wherein reduced viscosity is 0.55-0.65 dL/g, number average molecular weight (Mn) is 22000 or more, a value of the ratio (Mw/Mn) of weight average molecular weight (Mw) relative to number average molecular weight (Mn) is 2.54 or less, and a proportion of a repeating unit represented by a formula (1) is 80 to 100 mol %, relative to the total of all repeating units, Ph 1 -SO 2 -Ph 2 -O— (1) wherein Ph 1 and Ph 2 each independently represent a phenylene group, and hydrogen atoms of the aforementioned phenylene groups may each be independently substituted with one of an alkyl group, an aryl group, and a halogen atom. 2. Film comprising the aromatic polysulfone resin according to claim 1 . 3. The film according to claim 2 , which is a porous membrane. 4. The aromatic polysulfone resin according to claim 1 , wherein the reduced viscosity is 0.58-0.62 dL/g. 5. The aromatic polysulfone resin according to claim 1 , wherein the number average molecular weight (Mn) is 23500 to 27000. 6. The aromatic polysulfone resin according to claim 4 , wherein the number average molecular weight (Mn) is 23500 to 27000. 7. Film comprising the aromatic polysulfone resin according to claim 4 . 8. Film comprising the aromatic polysulfone resin according to claim 5 . 9. Film comprising the aromatic polysulfone resin according to claim 6 . 10. The film according to claim 7 , which is a porous membrane. 11. The film according to claim 8 , which is a porous membrane. 12. The film according to claim 9 , which is a porous membrane.
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Classifications
Drying · CPC title
- C08L81/06Primary
Polysulfones; Polyethersulfones · CPC title
Specific permeability or cut-off range · CPC title
characterised by their properties · CPC title
Polysulfones; Polyethersulfones · CPC title
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- What does patent US9587112B2 cover?
- 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 av…
- Who is the assignee on this patent?
- Kohinata Yusaku, Harada Hiroshi, Sumitomo Chemical Co
- What technology area does this patent fall under?
- Primary CPC classification C08L81/06. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Mar 07 2017 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).