Paints continued epoxy resin

Another application of particular note involving SS-RTP is the technology named phosphorescence barometry, which provides an inexpensive method for continuous pressure mapping of aerodynamic and automotive surfaces. The technology makes use of a luminescent paint (pressure-sensitive paint) that consists of an oxygen permeable polymer (e.g., silicone resins) in which a phosphorescent compound, a platinum porphyrin derivative, is dispersed. A temperature-sensitive paint would be similar except that an oxygen impermeable support should be used (e.g., an epoxy resin). 

Corrosion inhibitors in paints protect metallic surfaces from oxidation. Coating primers are used when there is continuous exposure to corrosive elements, e.g., in marine applications. Examples are coal-tar derivatives, epoxy resins and coal-tar modified epoxies. Primers that inhibit corrosion by anodic or cathodic polarization contain inorganic metallic pigments such as chromates or leads or both. Composite pigments containing calcium oxide, zinc, silica, and oxides of phosphorus and boron can also be used (Mathias 1984). Nowadays, powder paints such as polyester and epoxy powder paints can also be used for corrosion inhibition (Rose and Vance 1997). 

Many resins are prone to photooxidative attack. Moisture will be a further complication in all except desert climates. Outdoor exposure in Australia over a period of several years caused unpainted carbon/epoxy sandwich beam specimens, representative of an aircraft structure, to lose weight, because the degraded resin surface was readily removed by wind and rain [27], In some locations, the weight loss eventually stabilized, but in others, erosion removed loose fibres from the surface as well and the weight loss continued. Painted samples were not affected in the same way but it was recommended that aircraft should be kept in hangars as much as possible to extend paint life when used in similar climatic conditions. 

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