Process for the isolation of polymer fractions
US6653510B1 · kind B1 · utility
4Cited by
2References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 28, 2001 |
| Grant date | Nov 25, 2003 |
| Priority date | — |
| Expiry date | Dec 10, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G5/0764
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The invention relates to a process for isolating, from a polymer comprising repeating units which are individually of Formula X in whichY is P or N,Ar1 & Ar2 are bivalent aromatic groups,Ar3 is a monovalent aromatic group, andthe units of Formula X may be the same or different,a molecular weight fraction which is especially suitable for use as a charge transport material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.