Method for removing volatile impurities from polyphenylene ethers
US4831115A · kind A · utility
25Cited by
1References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 16, 1988 |
| Grant date | May 16, 1989 |
| Priority date | — |
| Expiry date | Feb 16, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G65/46
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Polymer compositions comprising polyphenylene ethers free from polystyrenes are extruded with vacuum venting at 300.degree. C. or above in the presence of water. This extrusion operation reduces the content of volatile impurities, including those with an undesirable odor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.