Vapor-phase preparation of aromatic polyamides
US4009153A · kind A · utility
9Cited by
9References
8Claims
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Inventor
Key dates
| Filing date | Mar 4, 1975 |
| Grant date | Feb 22, 1977 |
| Priority date | — |
| Expiry date | Mar 4, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31725
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Vapor-phase condensation polymerization of aromatic polyamides is carried out by vaporizing polyamide-forming monomers, diluting with an inert gas, and reacting the monomers in a reaction zone heated in the range of about 150.degree. C. to about 500.degree. C. from about 0.01 second to about 5 seconds or longer. The polyamide is preferably deposited on a removable inorganic or organic substrate maintained within the zone.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.