Polyimide molding powders

Abstract

Abstract IMPROVED POLYIMIDE MOLDING POWDERS ARE FORMED AT LOW COST BY PYROLYTICALLY POLYMERIZING COMPOUNDS OF THE GENERAL FORMULA E1-(R1-N<(-CO-)2>R3-CO-NH-R2-NH-CO-R3<(-CO-)2>N)N-R1-E2 WHERE: E1 AND E2 ARE INDIVIDUALLY SELECTED FROM THE CLASS CONSISTING OF 1,3-DI(O=),7A-Y1,3A-Y2,4-Y3,5-Y4,6-Y5,7-Y6,8-(Y7-X-)-1,3, 3A,4,7,7A-HEXAHYDRO-4,7-METHANOISOINDOL-2-YL WHERE C8 IS Y8, AND 2,5-DI(O=),3-Y2,4-Y1-3-PYRROLIN-1-YL WHERE: X IS A MEMBER OF THE CLASS CONSISTING OF CARBON, OXYGEN, SULFUR, AND CARBONYL Y1-Y6; AND Y7 AND Y8 WHEN PRESENT, ARE INDIVIDUALLY SELECTED FROM THE CLASS CONSISTING OF HYDROGEN, AROMATIC GROUPS, SUBSTITUTED AROMATIC GROUPS, SATURATED OR UNSATURATED HYDROCARBON GROUPS, HAVING 1 TO 6 CARBON ATOMS, ALKYL ETHERS, ARYL ETHERS, HALOGENS, AND NITRO GROUPS; R1 AND R2 ARE INDIVIDUALLY SELECTED FROM THE CLASS CONSISTING OF AROMATIC GROUPS, SUBSTITUTED AROMATIC GROUPS, SATURATED AND UNSATURATED HYDROCARBON GROUPS, SATURATED AND UNSATURATED HETEROCYCLIC GROUPS, AND MIXTURES THEREOF; R3 IS SELECTED FROM THE CLASS CONSISTING OF SUBSTITUTED AROMATIC GROUPS, UNSUBSTITUTED AROMATIC GROUPS, SATURATED CYCLIC GROUPS, UNSATURATED CYCLIC GROUPS, SATURATED HETEROCYCLIC GROUPS, AND UNSATURATED HETEROCYCLIC GROUPS, AND N IS ONE OR MORE FOR A SINGLE PREPOLYMER AND STATISTICALLY GREATER THAN 0 FOR A MIXTURE. THE MOLDING POWDERS MAY ALSO BE FORMED BY PYROLYTICALLY POLYMERIZING THE NOVEL AMIC-ACID PRECURSORS OF SAID PREPOLYMERS WHICH ARE CHARACTERIZED BY THE FORMULA E3-(R1-NH-CO-R3(-COOH)-CO-NH-R2-NH-CO-R3(-COOH)-CO-NH)N- R1-E4 WHERE: E3 AND E4 ARE INDIVIDUALLY SELECTED FROM THE CLASS CONSISTING OF 1-Y6,2-Y1,2-((-)NH-CO-),3-(HOOC-),3-Y2,4-Y3,5-Y4,6-Y5, 1,4-(-Y8N-X-Y7)-)CYCLOHEX-5-ENE, AND HOOC-C(-Y2)=C(-Y1)- CO-NH- WHERE: X1, Y1-Y6 AND Y7 AND Y8 ARE DEFINED AS DEFINED ABOVE; AND R1, R2, R3 AND N ARE AS DEFINED ABOVE.

Inventors

• 👤 H Lubowitz

Bibliographic Details