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Figure 2 Topography of CFRP structure without surface treatment (a) and treated with CY/Amine/SiO2 (b) or CY/Amine/POSS (c) coating. 3.3 Mass loss measurements The effects of surface modification with a protective organic-inorganic coating were firstly evaluated by measuring the mass loss caused by outgassing and UV radiation.
9/25/2007 Page 3 New Cycloaliphatic Amine Structure 1 6 5 4 2 3 7 H2N 8 9 NH2 10 1 2 3 4 6 5 7 H2N 8 9 NH2 10 CAS 2579-20-6 CAS 2549-93-1 Mixture of cis and trans 1,3 ...
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Cycloaliphatic amines will also produce epoxy cured coatings with better heat and chemical resistance, and improved mechanical properties. Secondary amines are lesser known than their primary amine types. These amines typically are slower to react than the primary aliphatic amine; and can be used to modify and slow the gelation process.
Ancamine® K54 by Evonik is a crosslinker based on 2,4,6-tris (dimethylaminomethyl) phenol. It is an efficient tertiary amine activator for epoxy resins cured with a wide variety of hardener types including polysulphides, polymercaptans, aliphatic & cycloaliphatic amines, polyamides, amidoamines, dicyandiamide and anhydrides.
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EPALLOY 5000 is the diepoxide of the cycloapliphatic alcohol, hydrogenated Bisphenol A. Due to its saturated ring structure, this resin is expected to find utility in applications requiring resistance to ultraviolet light exposure. Formulations based on standard DGEBA resins usually do not perform well in this environment.
Amine type will alter both the processing properties (viscosity, reactivity) and the final properties (mechanical, temperature and heat resistance) of the cured copolymer network. Thus amine structure is normally selected according to the application. Reactivity is broadly in the order aliphatic amines > cycloaliphatic amines > aromatic amines.