Preparation of poly(arylene ether ketones) by sequential oligomerization and polyerization in distinct reaction zones
US4912181A · kind A · utility
12Cited by
13References
21Claims
0Family size
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Key dates
| Filing date | May 9, 1988 |
| Grant date | Mar 27, 1990 |
| Priority date | — |
| Expiry date | May 9, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G61/127
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Poly(arylene ether ketones) are prepared by a Friedel-Crafts polymerization wherein a gelled reaction mixture is produced, by permitting the polymerization to proceed in a first reactor until substantial partial polymerization has occurred, but before substantial gelation of the reaction mixture; transferring the partially polymerized reaction mixture into a piston-equipped second reactor; permitting polymerization to continue in the second reactor until a gelled, polymerized reaction mixture has been obtained; and discharging the polymerized reaction mixture from the second reactor by stroking the piston.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.