Chemical modification of polyimides
US6660062B2 · kind B2 · utility
11Cited by
33References
42Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 9, 2002 |
| Grant date | Dec 9, 2003 |
| Priority date | — |
| Expiry date | May 9, 2022 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2323/30
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A process is provided for chemically modifying a dual-layer hollow fibre, wherein the fibre comprises a first layer consisting essentially of a polyimide and a second layer consisting essentially of a polymer which is substantially unaffected by the chemical modification process. The process comprises contacting the polyimide layer with a polyamine. In addition, a process is provided for chemically modifying a polyimide membrane in general, using a process which comprises contacting the membrane with an alcoholic solution of an aliphatic-aromatic polyamine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.