Aromatic polymers having phenylene groups linked by oxygen atoms, keto groups and sulphone groups
US4186262A · kind A · utility
13Cited by
8References
8Claims
0Family size
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Key dates
| Filing date | Jan 23, 1979 |
| Grant date | Jan 29, 1980 |
| Priority date | — |
| Expiry date | Jan 23, 1999 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G75/23
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Copolymers containing 40 to 90 mole % of repeat units ##STR1## and correspondingly 10 to 60 mole % of repeat units ##STR2## where Q and Q' are --SO.sub.2 -- or --CO-- and the number of --SO.sub.2 -- groups is 3 to 25% of the total number of --SO.sub.2 -- and --CO-- groups.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.