Abstract 1. A PROCESS FOR THE MANUFACTURE OF A PART-CURED POLYIMIDE PREPOLYMER HAVING AN "AVAILABLE WEIGHT LOSS" BETWEEN 2 AND 15% COMPRISING HEATING (A) A MIXTURE OF AT LEAST ONE AROMATIC ACIDIC MONOMER WITH AT LEAST ONE AROMATIC AMINO COMPOUND OR (B) AN AROMATIC AMINO CARBOXYLIC COMPOUND AT A TEMPERATURE OF AT LEAST 200*C. IN THE PRESENCE OF A DIPOLAR APROTIC SOLVENT HAVING A BOILING POINT OF AT LEAST 200*C. AND A MELTING POINT OF AT LEAST 0*C. UNTIL THE "AVAILABLE WEIGHT LOSS" OF THE PRODUCT IS BETWEEN 2 AND 15%, THEREAFTER DISCONTINUING SAID HEATING AND GRANULATING SAID AROMATIC ACIDIC MONOMER COMPRISES (I) MER, WHEREIN SAID AROMATIC ACIDIC MONOMER COMPRISES (I) AN AROMATIC TETRACARBOXYLIC ACID OR THE CORRESPONDING TETREACARBOXYLIC DIANHYDRIDE OR DI- OR TETRA-ESTERS DERIVED THEREFROM OR (II) AN AROMATIC TRICARBOXYLIC ACID OR THE CORRESPONDING TRICARBOXYLIC ANHYDRIDE OR THE MONO-, DIOR TRI-ESTERS DERIVED TEREFRM, SAID TETRACARBOXYLIC ACID HAVING ITS CARBOXYLIC GROUPS ARRANGED IN PAIRS WITH EACH PAIR OF CARBOXYLIC GROUPS BEING ATTACHED TO ADJACENT NUCLEAR CARBON ATOMS OR BEING IN A PERI RELATIONSHIP TO ONE ANOTHER AND SAID TRICARBOXYLIC ACID HAVING TWO OF ITS CARBOXYL GROUP IN ORTHO OR PERI RELATIONSHIP, SAID AROMATIC AMINO COMPOUND HAS THE GENERAL FORMULA Z-CO-NH-R1-NH-CO-Z'' AND WHEREIN SAID AROMATIC AMINOCARBOXYLIC COMPOUND HAS THE GENERAL FORMULA Z-CO-NH-R(II)(-COOH)2 OR IS THE CORRESPONDING DIANHYDRIDE, MONO- OR DI-ESTER THEREOF; IN WHICH FORMULAE R1 IS A BIVALENT RADICAL OF AROMATIC CHARACTER, RII IS TERVALENT RADICAL OF AROMATIC CHARACTER WITH CARBOXYL GROUPS IN ORTHO OR PERI RELATIONSHIP, -CO-Z AND -CO-Z'' ARE ACYL GROUPS OR Z AND Z'' ARE GROUPS OF THE FORMULA -ORIII WHEREIN RIII IS A MONOVALENT ALIPHATIC OR AROMATIC RADICAL FREE FROM TERMINAL OR PENDE NT METHYLENE GROUPS.
A PROCESS FOR THE MANUFACTURE OF A PART-CURED POLYIMIDE PREPOLYMER HAVING AN "AVAILABLE WEIGHT LOSS" BETWEEN 2 AND 15% COMPRISING HEATING (A) A MIXTURE OF AT LEAST ONE AROMATIC ACIDIC MONOMER WITH AT LEAST ONE AROMATIC AMINO COMPOUND OR (B) AN AROMATIC AMINO CARBOXYLIC COMPOUND AT A TEMPERATURE OF AT LEAST 200*C. IN THE PRESENCE OF A DIPOLAR APROTIC SOLVENT HAVING A BOILING POINT OF AT LEAST 200*C. AND A MELTING POINT OF AT LEAST 0*C. UNTIL THE "AVAILABLE WEIGHT LOSS" OF THE PRODUCT IS BETWEEN 2 AND 15%, THEREAFTER DISCONTINUING SAID HEATING AND GRANULATING SAID AROMATIC ACIDIC MONOMER COMPRISES (I) MER, WHEREIN SAID AROMATIC ACIDIC MONOMER COMPRISES (I) AN AROMATIC TETRACARBOXYLIC ACID OR THE CORRESPONDING TETREACARBOXYLIC DIANHYDRIDE OR DI- OR TETRA-ESTERS DERIVED THEREFROM OR (II) AN AROMATIC TRICARBOXYLIC ACID OR THE CORRESPONDING TRICARBOXYLIC ANHYDRIDE OR THE MONO-, DIOR TRI-ESTERS DERIVED TEREFRM, SAID TETRACARBOXYLIC ACID HAVING ITS CARBOXYLIC GROUPS ARRANGED IN PAIRS WITH EACH PAIR OF CARBOXYLIC GROUPS BEING ATTACHED TO ADJACENT NUCLEAR CARBON ATOMS OR BEING IN A PERI RELATIONSHIP TO ONE ANOTHER AND SAID TRICARBOXYLIC ACID HAVING TWO OF ITS CARBOXYL GROUP IN ORTHO OR PERI RELATIONSHIP, SAID AROMATIC AMINO COMPOUND HAS THE GENERAL FORMULA
Claim 2
Dependent Claim
197 words
A PROCESS FOR THE MANUFACTURE OF A PART-CURED POLYIMIDE PREPOLYMER HAVING AN "AVAILABLE WEIGHT LOSS" BETWEEN 2 AND 15% COMPRISING HEATING (A) A MIXTURE OF AT LEAST ONE AROMATIC ACIDIC MONOMER WITH AT LEAST ONE AROMATIC AMINO COMPOUND OR (B) AN AROMATIC AMINO CARBOXYLIC COMPOUND AT A TEMPERATURE OF AT LEAST 200*C. IN THE PRESENCE OF A DIPOLAR APROTIC SOLVENT HAVING A BOILING POINT OF AT LEAST 200*C. AND A MELTING POINT OF AT LEAST 0*C. UNTIL THE "AVAILABLE WEIGHT LOSS" OF THE PRODUCT IS BETWEEN 2 AND 15%, THEREAFTER DISCONTINUING SAID HEATING AND GRANULATING SAID AROMATIC ACIDIC MONOMER COMPRISES (I) MER, WHEREIN SAID AROMATIC ACIDIC MONOMER COMPRISES (I) AN AROMATIC TETRACARBOXYLIC ACID OR THE CORRESPONDING TETREACARBOXYLIC DIANHYDRIDE OR DI- OR TETRA-ESTERS DERIVED THEREFROM OR (II) AN AROMATIC TRICARBOXYLIC ACID OR THE CORRESPONDING TRICARBOXYLIC ANHYDRIDE OR THE MONO-, DIOR TRI-ESTERS DERIVED TEREFRM, SAID TETRACARBOXYLIC ACID HAVING ITS CARBOXYLIC GROUPS ARRANGED IN PAIRS WITH EACH PAIR OF CARBOXYLIC GROUPS BEING ATTACHED TO ADJACENT NUCLEAR CARBON ATOMS OR BEING IN A PERI RELATIONSHIP TO ONE ANOTHER AND SAID TRICARBOXYLIC ACID HAVING TWO OF ITS CARBOXYL GROUP IN ORTHO OR PERI RELATIONSHIP, SAID AROMATIC AMINO COMPOUND HAS THE GENERAL FORMULA