Sulphonated polyaryletherketones
US4268650A · kind A · utility
42Cited by
6References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 21, 1979 |
| Grant date | May 19, 1981 |
| Priority date | — |
| Expiry date | Aug 21, 1999 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G65/48
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A polyaryletherketone polymer which is a hydrophilic sulphonated polymer derived by controllably sulphonating a polymer having the repeat unit of formula ##STR1## alone or in conjunction with the repeat unit of formula ##STR2## the latter units, if present, remaining substantially non-sulphonated after sulphonation. The sulphonation may be effected using 98% w/w concentrated sulphuric acid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.