Amine-cured epoxy coating

Degradation of Amine-Cured Epoxy Coating on Cold-Rolled Steel... 

FTIR-RA spectra of the amine-cured epoxy coating on cold-rolled steel before and after exposure at 40°C and 80% RH are shown In... 

S. G. Croll, "Residual Stress in a Solventless Amine-Cured Epoxy Coating", J. of Coatings Technology, Vol. 51, 659. 49-55, Dec. 1979. 

Higher molecular weight epoxy resin hardeners such as fatty polyamides do not have the problems associated with amines and amine adducts. These reaction products of dimer and trlmer acids with polyfunctional amines provide films with fewer surface discontinuities. Polyamide cured epoxy coatings are more forgiving than amine cured epoxy coatings since they require less demanding surface preparation. Also, mix ratios are less critical for poly-amide/epoxy coatings (56). 

Phenols are used as blocking agents in wire coatings. Phenol blocked isocyanates react with amines at room temperatin-e. They are used as flexibilizing reactive additives in amine cured epoxy coatings (131). 

Figure 11.18 Microcapsule-based self-reporting material amine cured epoxy coating mixed with microcapsules that contained 2, 7 -dichlorofluorescein (DCF), (a) Schematic of the release of DCF solution from broken microcapsules into a crack or scratch where the dye encounters the amine groups of the resin, resulting in colour change, (h) Colour change of a DCF solution in the presence of an amine, (c) Self-reporting properties of the described material.

Rezig A, Nguyen T, Martin D, Sung L, Gu X, Jasmin J, Martin J (2006) Relationship between chemical degradation and thickness loss of an amine-cured epoxy coating exposed to different UV environments. JCT Res 3(3) 173-184... 

For resistance to acid conditions alone, traditional filled and unfilled bituminous solutions (which have economic advantages), chlorinated rubber and shellac have been used. Crosslinking coatings, e.g. amine-cured epoxy resins, often blended with coal-tar which develops resistance to oils and solvents, have obvious advantages on chemical plant. 

Fourier transform Infrared spectroscopy has been shown to be an excellent tool for surface and Interface studies (.2), In this paper, the application of reflection/absorption Fourier transform Infrared spectroscopy (FTIR-RA) for studying the degradation of amine-cured epoxy and polybutadiene coatings on cold-rolled steel after exposure to a warm, humid environment is reported. 

The formation of networks by addition polymerization of multifunctional monomers as minor components included with the monofunctional vinyl or acrylic monomer is industrially important in applications as diverse as dental composites and UV-cured metal coatings. The chemorheology of these systems is therefore of industrial importance and the differences between these and the step-growth networks such as amine-cured epoxy resins (Section 1.2.2) need to be understood. One of the major differences recognized has been that addition polymerization results in the formation of microgel at very low extents of conversion (<10%) compared with stepwise polymerization of epoxy resins, for which the gel point occurs at a high extent of conversion (e.g. 60%) that is consistent with the... 

Elastomer modification of two-package epoxy coatings has been carried out either with rubber addition to the epoxy component or to the hardener component. Amine-reactive nitrile liquids have been examined extensively in polyamide cured epoxy coatings. The... 

The reactive groups attached to the molecules of an epoxy resin can react with several curing agents, such as amines, anhydrides, acids, mercaptans, imidazoles, phenols and isocyanates, to create covalent intermolecular bonds and thus to form a three-dimensional network. Among these compounds, due to the enhanced environmental stability of amine-cured epoxy resin (Dyakonov et al., 1996), primary and secondary amines are the curing agents most commonly used in particular aliphatic or cycloaliphatic amines for low-temperature epoxy systems as adhesives or coatings and aromatic amines to produce matrices for liber-reinforced composites (Pascault and Williams, 2010). In Fig. 5.14 the structures of both an aliphatic and an aromatic amine are shown. 

Weinmann D J, Dangayach K and Smith C (1996), Amine-functional curatives for low temperature cure epoxy coatings , J Coat Technol, 68, 29-37. 

The best generic coatings for carbon steel that may be surrounded by wet insulation in the 140° to 250° F (60° to 120° C) range are the epoxy phenolic and the amine-cured coal tar epoxy formulations. 

Coal tar epoxy coatings are formulated by using liquid or solid epoxy resins. A variety of curing agents can be used for instance amines, amine... 

Bailey, M.A., Cauffman, T. and Costin, R. (1996) New developments in acrylates modified epoxy-amine cure coatings, paper presented at FCST International Coatings Technology Conference, 23 October, 19%. 

Nuclear coatings are formulated to seal and protect concrete, concrete block and steel surfaces. The most commonly used coating types are the amine and polyamide cured epoxy systems. The solids, by volume, can vary from 50 to 100% with fillers or reinforcement fibers usually added so that the coating can perform a wide variety of functions. Reasons for their wide use are that they bond tenaciously to a variety of substrates they cure to a hard smooth finish which results in superior decontamination qualities and, most importantly, they perform satisfactorily in Ciass 1 and 2 service. 

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