Treatment agent for carbon fiber precursor, aqueous solution of treatment agent for carbon fiber precursor, carbon fiber precursor, and method for producing carbon fibers
US11879205B2 · kind B2 · utility
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12Claims
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Key dates
| Filing date | Jun 2, 2021 |
| Grant date | Jan 23, 2024 |
| Priority date | — |
| Expiry date | Jun 2, 2041 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD06M2200/40
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The present invention addresses the problem of suitably improving a treatment agent for a carbon fiber precursor in terms of the heat resistance and the effect of suppressing fusion between fibers during the step of flame-resisting treatment. This treatment agent for a carbon fiber precursor is characterized by containing a lubricant, the lubricant comprising a specific sulfur-containing diester compound and a specific sulfur-containing monoester compound.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.