Aromatic polymers
US4051109A · kind A · utility
12Cited by
1References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 26, 1973 |
| Grant date | Sep 27, 1977 |
| Priority date | — |
| Expiry date | Feb 26, 1993 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G65/38
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Aromatic polymers containing benzenoid groups and oxygen atoms in the polymer chains are made by the action of an alkali metal hydroxide on a dihalogeno-benzenoid compound in which each halogen atom is activated by an inert electron-attracting group such as --SO.sub.2 --. When a bis-(4-halogenophenyl) sulphone is reacted with an alkali metal hydroxide, the alkali metal salt of a 4-(4-halogenophenylsulphonyl)phenol is formed as a readily isolated intermediate which polymerizes in the presence or absence of solvent to give a polymer having repeating units of the structure ##STR1##
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.