Paint types urethane alkyds

Autooxidative cross-linking type paints include alkyds, epoxies, esters, oil-moditied urethanes, and so on. These are commonly used, when properly formulated, to resist moisture and chemical fume environments. They can be applied over wood, metal, or masonry substrates. 

Among these resin fortified oil based paints are included the alkyds, epoxy esters, oil modified urethanes, etc. These paints may be formulated as airdrying or baking types, and with suitable pigments be formulated to be resistant to a variety of moisture and chemical fume environments, as well as application over wood, metal, and masonry substrates. These paints have the following advantages ... 

Binders, vehicles, or resins may be of several types. AUsyd resins are among the most common and are composed of polymers of alcohols and adds—thus the term alkyd -ale from alcohol, -yd standing for add). Acrylic resins are based on polymers of methacrylate and methyl methacrylate (esters. Figure 11.32) similarly, vinyl resins are derived from vinyl chloride. Urethanes (polyurethanes) and some silicon-based resins are also encountered. Watercol-or paints use gum arabic as a binder. This material is obtained from the sap of the acacia tree and, when dry, forms a dear, water-soluble polymer matrix. 

Most of the important types of modem solvent-borne coatings — epoxies, alkyds, acrylics — are also available in waterborne formulations. In recent years, even urethane polymer technology has been adapted for use in waterborne coatings [1]. However, waterborne paints are not simply solvent-borne paints in which the organic solvent has been replaced with water the paint chemist must design an entirely new system from the ground up. In this chapter, we discuss how waterborne paints differ from their solvent-bome counterparts. 

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