Ethynyl-containing phthaloyl halides
US4657708A · kind A · utility
2Cited by
2References
4Claims
0Family size
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Key dates
| Filing date | Dec 10, 1985 |
| Grant date | Apr 14, 1987 |
| Priority date | — |
| Expiry date | Dec 10, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C63/66
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Aromatic monomers, each containing at least one o-ethynyl carboxylic acid halide subunit: ##STR1## wherein X is Cl or Br. These monomers can be reacted with amines to form aromatic polyamide resins which can be thermally treated to undergo intromolecular cyclization, without evolution of volatiles, into polyimidines.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.