Method of concentrating polyphenylene ether solutions
US4692482A · kind A · utility
12Cited by
3References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 22, 1986 |
| Grant date | Sep 8, 1987 |
| Priority date | — |
| Expiry date | Oct 22, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G65/46
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The invention relates to a two-stage method for concentrating solutions of polyphenylene ethers (5-15 wt. %) in organic solvents, wherein the first stage is operated with recycle and the second stage is operated in a single pass with no recycle side streams, to produce an accurately adjusted final concentration of between 50 and 60 wt. %.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.