Preparing poly (arylene ketone) with liquefaction agent treatment
US4665151A · kind A · utility
4Cited by
17References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 11, 1984 |
| Grant date | May 12, 1987 |
| Priority date | — |
| Expiry date | Oct 11, 2004 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G67/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The preparation of poly(arylene ketones) and in particular all para-linked poly(arylene ether ketones) by Friedel-Crafts polymerization in the presence of a Lewis acid generally results in an intractible reaction product difficult to remove from the reaction vessel and difficult to purify. The addition of a liquefaction agent, such as a hydrogen halide and in particular hydrogen chloride, to the reaction mixture, results in a tractible gel or a liquid which can be readily handled. The hydrogen halide is preferably under pressure and a diluent may also be added along with the hydrogen halide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.