Water white polyimide polymer prepared from di(aminomethyl)-dialkyladamantanes
Abstract
Abstract 1. METHOD FOR THE PREPARATION OF A SOLID POLYIMIDE POLYMER COMPRISING: (A) CONTACTING ESSENTIALLY EQUAL MOLE AMOUNTS OF A DIANHYDRIDE SELECTED FROM THE GROUP CONSISTING OF DIANHYDRIDE OF 1,2,4,5-BENZENE-TETRACARBOXYLIC ACID AND 3,4,3'',4'' - BENZOPHENONETETRACARBOXYLIC DIANHYDRIDE AND A DIALKYLADAMANTANE DIAMINE OF THE FOLLOWING STRUCTURE: 1-R,3-R2,5,7-(H2N-CH2-)-ADAMANTANE WHERE EACH OF R1 AND R2 IS ALKYL RADICAL HAVING 1-10 CARBON ATOMS IN THE PRESENCE OF A SUITABLE POLAR ORGANIC SOLVENT AT A TEMPERATURE OF 0* C.-30* C., AND MAINTAINING SAID CONTACTING UNTIL THE DESIRED VISCOSITY IS OBTAINED; AFTERWARDS, (B) REMOVING SAID SOLVENT AT A TEMPERATURE BELOW THE CONDENSATION TEMPERATURE OF THE RESULTING POLYMIC ACID; AND AFTER REMOVAL, (C) HEATING THE POLYIMIC ACID TO A TEMPERATURE OF ABOUT 150* C.-500* C. UNTIL CONDENSATION IS COMPLETED WHEREBY RESULTING SOLID POLYIMIDE IS CLEAR AND WATER WHITE.
Inventors
- 👤 R Thompson
Bibliographic Details
Claims Analysis
Total Claims: 2References Cited (Backward Citations)
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