Method for manufacturing polyoxazole and polythiazole precursors
US4622285A · kind A · utility
33Cited by
4References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 27, 1985 |
| Grant date | Nov 11, 1986 |
| Priority date | — |
| Expiry date | Mar 27, 2005 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01B3/303
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Oligomeric and/or polymeric polyoxazole and polythiazole precursors can be prepared with high purity, i.e., especially without chloride, in a simple manner if an aromatic and/or heterocyclic dihydroxy, dialkoxy or diaryloxydiamino compound or a corresponding dithio compound is reacted with a dicarboxylic acid in the presence of a carbodiimide. The precursors prepared in this manner are suitable, for instance, for the manufacture of protection and insulating layers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.