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Question about epoxy resin chemistry..
Hello everyone.
I am attempting to find a suitable epoxy resin in SE Asia (Thailand specifically) for building a composite airplane. It doesn't appear that any recognized brands are sold here, however there are factories that produce epoxy of all kinds. However, in order to get the correct epoxy I need to know what to ask for. Specifically, my research on the web has led me to conclude that most aviation/aerospace epoxies are Bisphenol-A based resins with an amine based hardener? Is this correct or have I interpreted the data incorrectly? What I am looking for is a very high strength hardner that performs well in humid climates and is oven cured at about 120C/250F. I also need good viscosity for long periods at room temperature. Additionally, I need a room temperature curing epoxy that can cure much quicker but gives me similar strength. As I understand the technology, the resin really isn't that important in the overall equation. Any bisphenol-A resin will generally work. But the choice of hardner is crucial. Can someone help me understand the chemistry here? Should I be looking at an amine based hardner, and if so, which type? Aromatic Amines Aliphatic Amines Cycloaliphatic Amines Boron-Hydride Amines etc. Then there are "modified" versions of each of these, and they also make and sell blends. There are other types of hardners as well, and I don't understand those either. Can anyone tell me what a "normal" aviation grade expoxy resin consists of? What about resources that will help me to understand this so I can make an informed choice. Thanks for any information. Chris |
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