Filament-Winding Plastics. Part IV. Syntheses, Properties, and Uses of M-Aminobenzyl Amine (Maba)

摘要

During research aimed at improving the tensile properties of plastics suitable for filament winding applications, about 100 materials have been examined in various combinations. The majority of the materials offered no outstanding improvements in the properties sought, relative to standard filament winding systems. But one material new to this application, m-aminobenzyl amine or MABA, has been found to impart substantial improvements to two epoxy plastics of the most useful types. MABA may be synthesized readily by catalytic hydrogenation of m-nitrobenzonitrile or m-nitrobenzaldoxime. It is a solid which melts below 40C and may be easily incorporated into epoxy resins. Its unique properties apparently result from the differences in reactivity of the two amino groups, one attached to the benzene ring and the other displaced by a methylene group. MABA and the diglycidyl ether of Bisphenol-A produce a liquid resin system suitable for 'wet winding,' from which plastic of exceptional energy-absorbing capability is obtained. The plastic produced from MABA and an isomer of dicyclopentyl ether diepoxide has an exceptionally high tensile modulus and ultimate tensile strength. This system has convenient properties for the production of preimpregnated glass strands from which filament windings can be fabricated. (Author)