Extended Flow Life Laminating Resin System
Final rept. 1 Oct 1974-31 Jan 1976
WHITTAKER CORP SAN DIEGO CA RESEARCH AND DEVELOPMENT DIV
Pagination or Media Count:
Epoxy resincuring agentcatalyst combinations were investigated in efforts to obtain state-of-the-art performance 350 F from graphite fiber reinforced composites coupled with prolonged prepreg out-times greater than 75 days under ambient shop conditions. Resins evaluated included multifunctional commercially available glycidyl ethers and glycidyl amines. Curing agent studies were limited to potentially latent, high functionality systems and included hydrazides, amino-hydrazides and aromatic diamines with attenuated reactivity. The basic approach was to employ curing agents which would exhibit virtual insolubility in the resin combinations at slightly elevated prepregging temperatures less than 150 F but becomes soluble at processing approximately equal to 250 F temperatures.
- Laminates and Composite Materials