Accession Number : ADA325850

Title :   Development of Hot Melt Flexible Polyimide Sealants for Rapid Sealing of Aircraft and Missiles,

Descriptive Note : Final rept. Sep 82-Mar 84,

Corporate Author : TRW SPACE AND TECHNOLOGY GROUP REDONDO BEACH CA

Personal Author(s) : Chang, Glenn E.

PDF Url : ADA325850

Report Date : 30 SEP 1984

Pagination or Media Count : 48

Abstract : Studies were conducted on a baseline hot-melt flexible polyimide formulation developed on a previous NADC contract for potential application as a quick-fix field repair sealant for Navy aircraft and missiles. The baseline formulation was 1.0:0.5:0.6 by mol methylenedianiline (MDA) :bismaleimidophenylmethane (BMPM) :Jeffamine ED-900 bismaleimide (BMJ900). Studies consisted of Task I - Flexible Polyimide Optimization & Scale-up - and Task II - Resin Compounding & Hot Melt Tool Development - and III - Finalize Sealant Evaluation Studies. Different variations of filled and compounded formulations were prepared and examined for solvent, water immersion, and humidity stability. Efforts were conducted to prepare a formulation suitable for extrusion through a commercially available hot-melt sealant applicator. No one resin was found to meet the program goal requirements. Because of this, Task IV - Field Demonstration - was not performed, with concurrence of the NADC Technical Monitor.

Descriptors :   *GUIDED MISSILES, *AIRCRAFT, *HIGH TEMPERATURE, *MELTS, *SEALING COMPOUNDS, *POLYIMIDE RESINS, TEST AND EVALUATION, STABILITY, OPTIMIZATION, MONITORING, POLYMERS, FORMULATIONS, EXTRUSION, BASE LINES, NAVAL AIRCRAFT, LIQUID IMMERSION TESTS, METHANE, METHYLENES, PHENYL RADICALS, HUMIDITY, ANILINES.

Subject Categories : Polymer Chemistry
      Adhesives, Seals and Binders
      Aircraft
      Guided Missiles

Distribution Statement : APPROVED FOR PUBLIC RELEASE