Heat-stable polyimide resins from a bis-imide, a polyamine and an alazine
US4012361A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 22, 1972 |
| Grant date | Mar 15, 1977 |
| Priority date | — |
| Expiry date | Feb 22, 1992 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31623
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
New heat-stable resins are provided having good mechanical and electrical properties combined with chemical inertness at temperatures of 200.degree. to 300.degree. C, which resins are resins of a three-dimensional polyimide which is obtained by reacting, at between 50.degree. C and 350.degree. C, a bis-imide of the general formula: ##STR1## in which Y denotes H, CH.sub.3 or Cl, and A represents a divalent organic radical possessing at least two carbon atoms, a polyamine of the general formula: EQU R (NH.sub.2).sub.x in which x represents an integer at least equal to 2 and R denotes an organic radical of valency x, and an alazine of the general formula: EQU G -- CH = N -- N = CH -- G in which G represents a monovalent aromatic radical, in amounts such that if N.sub.1 represents the number of mols of bis-imide employed, N.sub.2 represents the number of mols of polyamine employed and N.sub.3 represents the number of mols of alazine employed, the ratio ##EQU1## is at least 1.3, x being defined as above.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.