Processes for preparing high inherent viscosity polyareneazoles using metal powders
US7671171B2 · kind B2 · utility
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19Claims
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Key dates
| Filing date | Mar 27, 2006 |
| Grant date | Mar 2, 2010 |
| Priority date | — |
| Expiry date | Nov 12, 2028 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G73/22
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Disclosed are processes for preparing polyareneazole polymers that include contacting, in polyphosphoric acid, azole-forming monomers and metal powder, the metal powder added in an amount of from about 0.05 to about 0.9 weight percent, based on the total weight of the azole-forming monomers, and reacting the azole-forming monomers to form the polyareneazole polymers. Polyareneazoles, filaments and yarns are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.