Heat-stable polyimide resin modified by unsaturated polyester
US3970714A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 5, 1974 |
| Grant date | Jul 20, 1976 |
| Priority date | — |
| Expiry date | Mar 5, 1994 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G73/122
- 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 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: ##EQU1## 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, and an unsaturated polyester and/or a polymerizable monomer other than a bis-imide, containing at least one polymerizable vinyl, maleic, allyl or acrylic EQU --CH=C< group 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 ##EQU2## IS AT LEAST 1.3, X BEING DEFINED AS ABOVE.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.