Copolymer fibers and processes for making same
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United States of America Patent
Stats
-
Jun 14, 2016
Grant Date -
Jan 17, 2013
app pub date -
Jan 13, 2012
filing date -
Jan 13, 2011
priority date (Note) -
In Force
status (Latency Note)
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Abstract
The present invention concerns yarns comprising copolymer derived from the copolymerization of para-phenylenediamine, 5(6)-amino-2-(p-aminophenyl)benzimidazole; and terephthaloyl dichloride wherein the ratio of moles of 5(6)-amino-2-(p-aminophenyl)benzimidazole to the moles of para-phenylenediamine is 30/70 to 85/15. The yarns have a sulfur content greater than 0.1%; and have an effective polymer cation to sulfur content molar ratio of at least 0.3. Additional aspects of the invention concern methods of producing such yarns.
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International Classification(s)
- 2012 Application Filing Year
- D01D Class
- 164 Applications Filed
- 142 Patents Issued To-Date
- 86.59 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 0 Citation Count
- D01D Class
- 0 % this patent is cited more than
- 9 Age
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Dec 14, 2027 |
