Extended Flow Life Laminating Resin System
Abstract
Epoxy resin/curing agent/catalyst 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.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1976
- Accession Number
- ADB014155
Entities
People
- C. B. Delano
- E. S. Harrison