Oligomers and polymers containing sulfonite groups and method for the production thereof
US7202327B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Sep 2, 2002 |
| Grant date | Apr 10, 2007 |
| Priority date | — |
| Expiry date | Sep 2, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P70/50
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The invention relates to novel polymers or oligomers containing at least sulfonite groups (P-(SO2)nX, X=1−(n=1), 2−(n=2) or 3−(n=3) valent metal cation or H+ or ammonium ion NR4+ wherein R=alkyl, aryl, H), which are obtained by completely or partially reducing polymers or oligomers containing at least SO2Y-groups (Y=F, Cl, Br, I, OR, NR2 (R=alkyl and/or aryl and/or H), N-imidazolyl, N-pyrazolyl) by means of suitable reducing agents in a suspension or in a solution form. The invention also relates to polymers and polymer(blend) membranes which are obtained by further reacting the obtained sulfinated polymers, especially by alkylation of the sulfinate groups with mono- di- or oligo functional electrophiles. The invention further relates to methods for producing the sulfinated polymers and for further reacting the sulfinated polymers with electrophiles by S-alkylation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.