Method for preparing polyamide-imides from (O, imide and polyamine
US5266678A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 30, 1991 |
| Grant date | Nov 30, 1993 |
| Priority date | — |
| Expiry date | Aug 30, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G73/1003
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A method for preparing a polymer including the step of reacting carbon monoxide and a reactant pair having respective general formulas ##STR1## and or a reactant having the general formula ##STR2## in the presence of catalyst and free iodo or bromo ions. X is a nonortho halide selected from --Br and --I. n is an integer from 0 to 4. R.sup.1 is selected from the group consisting of alkyl, arylalkyl, aryl, heteroaryl, and cycloalkyl. R.sup.2 is selected from the group consisting of ##STR3## and Each R.sup.5 is independently selected from the group consisting of alkyl and aryl, m is an integer from 1-12, and j is an integer between 0 and 300. R.sup.3 is selected from the group consisting of substituted aryl, unsubstituted aryl, substituted heteroaryl, and unsubstituted heteroaryl.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.