Sulphonated polyaryletherketones
US4419486A · kind A · utility
33Cited by
9References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 26, 1981 |
| Grant date | Dec 6, 1983 |
| Priority date | — |
| Expiry date | May 26, 2001 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G61/127
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A polyaryletherketone polymer which is a hydrophilic sulphonated polymer derived by controllably sulphonating a copolymer having the repeat unit of formula ##STR1## together with the repeat unit of formula ##STR2## at least 70% (preferably substantially all) of the units A being sulphonated after sulphonation and substantially all the units B remaining non-sulphonated after sulphonation. The sulphonation may be effected using 98% w/w concentrated sulphuric acid at an elevated temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.