Polyesteramides and process for producing the same
US4237251A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 11, 1979 |
| Grant date | Dec 2, 1980 |
| Priority date | — |
| Expiry date | Jan 11, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31605
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Polyesteramides produced by reacting in the first step an aromatic monoalkyl dicarboxylate with an aromatic diisocyanate in the presence or absence of one or more monoalkyl dicarboxylates and/or diisocyanates to produce an aromatic dialkyl diamidedicarboxylate of the formula: ##STR1## wherein R.sub.1 is alkyl; and R.sub.2 is a divalent aromatic residue, or a mixture of dialkyl diamidedicarboxylates containing the compound of the formula (II), and reacting in the second step the compound of the formula (II) or the mixture containing the compound of the formula (II) with one member selected from the group consisting of PA1 (a) one or more polyhydric alcohols, PA1 (b) one or more polyhydric alcohols and polyvalent carboxylic acids, and PA1 (c) one or more polyhydric alcohols and a linear polyester have improved heat resistance as well as excellent mechanical properties and can be used, e.g., for enamelled wire.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.