Sizing compositions for carbon fibers
US10106680B2 · kind B2 · utility
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17References
20Claims
0Family size
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Key dates
| Filing date | Apr 6, 2015 |
| Grant date | Oct 23, 2018 |
| Priority date | — |
| Expiry date | May 1, 2035 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD06M2200/40
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The present invention provides aqueous, epoxy-based sizing compositions for carbon fibers. The size composition incorporates highly functionalized film forming epoxy novolac phenolic resins in combination with highly functionalized sulfonated polyesters having high Tg characteristics, sulfonate equivalent weights in the range from 2000 to 20,000 and number average molecular weights in the range from about 1000 to about 100,000. The present invention also provides corresponding sized carbon fibers and fiber-reinforced matrices.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.