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Intractable poly(p-phenylenebenzobisthiazole) fiber |
| T105604 |
Intractable poly(p-phenylenebenzobisthiazole) fiber
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| Inventor: |
Uy |
| Date Issued: |
July 2, 1985 |
| Application: |
06/611,932 |
| Filed: |
May 21, 1984 |
| Inventors: |
Uy; William C. (Wilmington, DE)
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| U.S. Class: |
428/364; 528/337 |
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| Abstract: |
Poly(p-phenylenebenzobisthiazole) (PBT) fiber which is at least partially insoluble in methanesulfonic acid at room temperature. The fiber is prepared by heat treatment of PBT fiber, for a time sufficient to make it at least partially insoluble in methanesulfonic acid, at temperatures of 550.degree. C. (e.g., for 600 seconds) to 780.degree. C. (e.g., for 18 seconds). |
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