Systems and methods for fiber zone-drawing and/or zone-annealing
US-2024200234-A1 · Jun 20, 2024 · US
Flame resistant polymer, polymer solution, flame resistant fiber, carbon fiber, and methods of producing same
US9765448B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9765448-B2 |
| Application number | US-201414904455-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jul 11, 2014 |
| Priority date | Jul 12, 2013 |
| Publication date | Sep 19, 2017 |
| Grant date | Sep 19, 2017 |
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- Title
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Abstract
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A flame resistant polymer is obtained by reacting polyacrylonitrile with amine and nitro compounds, the polyacrylonitrile being polymerized by aqueous suspension polymerization using a redox initiator and containing an S component at an amount of 3,000 μg/g or less. A PAN-based polymer in which both yarn producing properties and flame resistance are improved can be realized.
First claim
Opening claim text (preview).
The invention claimed is: 1. A flame resistant polymer obtained by reacting polyacrylonitrile with amine and nitro compounds, said polyacrylonitrile being polymerized by aqueous suspension polymerization with a redox initiator and containing an S component at an amount of 3,000 μg/g or less, wherein said polyacrylonitrile has a number average molecular weight Mn of 30,000 or more and 300,000 or less, and a molecular weight distribution (Mw/Mn), which is a ratio of a weight average molecular weight Mw to said number average molecular weight Mn, of 1 or more and 5 or less. 2. The flame resistant polymer according to claim 1 , wherein said polyacrylonitrile is polymerized with a persulfate-based oxidant as an oxidant for combination of said redox initiator in an amount of 0.5 to 6 wt % relative to acrylonitrile. 3. The flame resistant polymer according to claim 1 , wherein said polyacrylonitrile is polymerized with a sulfite-based reductant as a reductant for combination of said redox initiator in an amount of 0.25 to 3 wt % relative to acrylonitrile. 4. The flame resistant polymer according to claim 1 , wherein a content of an S component is 3,000 μg/g or less. 5. A polymer solution containing a flame resistant polymer according to claim 1 and an organic solvent. 6. A flame resistant fiber prepared by solution spinning a polymer solution according to claim 5 . 7. A method of producing a carbon fiber comprising a step of carbonizing the flame resistant fiber according to claim 6 . 8. The flame resistant polymer according to claim 2 , wherein said polyacrylonitrile is polymerized with a sulfite-based reductant as a reductant for combination of said redox initiator in an amount of 0.25 to 3 wt % relative to acrylonitrile. 9. The flame resistant polymer according to claim 2 , wherein a content of an S component is 3,000 μg/g or less. 10. The flame resistant polymer according to claim 3 , wherein a content of an S component is 3,000 μg/g or less.
Assignees
Inventors
Classifications
used for fibers · CPC title
from polyacrylonitriles · CPC title
Acrylonitrile · CPC title
Wet spinning methods {(D01D5/0046 takes precedence)} · CPC title
Acrylonitrile · CPC title
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- What does patent US9765448B2 cover?
- A flame resistant polymer is obtained by reacting polyacrylonitrile with amine and nitro compounds, the polyacrylonitrile being polymerized by aqueous suspension polymerization using a redox initiator and containing an S component at an amount of 3,000 μg/g or less. A PAN-based polymer in which both yarn producing properties and flame resistance are improved can be realized.
- Who is the assignee on this patent?
- Univ Tokyo
- What technology area does this patent fall under?
- Primary CPC classification D01F6/18. Mapped technology areas include Textiles & Paper.
- When was this patent published?
- Publication date Tue Sep 19 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).