Coating Composition Design

Generally, the formulation of a coating may be said to consist of the binder, pigment, additives, and carrier. The binder and the pigment are the most important elements they may be said to perform the corrosion-protection work in the cured paint. 

Additives may alter certain characteristics of the binder, pigment, or carrier to improve processing and compatibiUty of the raw materials or application and cure of the coating. 

The carrier is the vehicle in the uncured paint that carries the binder, the pigments, and the additives. It exists only in the uncured state. Carriers are liquids in the case of solvent-borne and waterborne coatings, and gases in the case of powder coatings. 

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SEPIFILM and SEPISPERSE Dry are ready-to-use, immediate-release, film coating compositions designed for pharmaceutical and nutritional supplement applications. Based on a unique technology, SEPIFILM/SEPISPERSE Dry are granular forms offering the following benefits ... 

Table 4-15 lists base materials Elliott has tested. This list, which is continually being expanded, includes low alloy steels, high alloy iron base, nickel base, cobalt base materials, and odiers. Table 4-16 shows some of the coatings Elliott has tested. The list indicates die supplier, coating designation, and major components of the coating composition. 

Stray current dumpers (SCD) with proprietary coating applied in interlayers. The system and the coating composition is designed to promote hydrogen evolution at low overpotentials and to protect the titanium metal phase. 

Finally, a new aluminum fire-resistant paneling consists of a composite design that includes a solid thermoplastic compound core covered with a high density polyethylene adhesive film and an aluminum skin. The product is easily formable. It has sound deadening abilities, and an optional poly(vinyhdene fluoride) resin coating provides damage resistance. 

Steel plates measuring 600 x 600 x 1.5 mm were coated on one side with coating composition M ASB, indoor application, which is designed for metal substrates in thicknesses of 1.4-1.7 mm, and tested in a furnace according to ASTM E119. Temperature was registered on the uncoated side of the samples. Temperature curves are illustrated in Figure 8.7. 

In the presence of molten salts, hot corrosion is unavoidable. Alloy components only slowdown the corrosion process. The naturally forming oxide layers are not sufficient to completely protect against hot corrosion. Composites have been used to resist salt corrosive attack at high temperatures. These composites consist of a metal or alloy core with a coating specially designed to resist hot corrosion. The metal core provides strength and the coating provides protection. 

This situation requires speciahzed solutions with optimized insert geometries and substrate/ coating composition. Figure 1 shows a tool especially designed for the machining of titanium. 

The parallel artificial membrane assay (PAMPA) was first described by Kansy et al. The assay consists in measuring the rate of transfer of compounds from a donor to an acceptor compartment that is separated by a porous filter coated with a mixture of phospholipids in dodecane. The exact nature of the membrane is not known and is unlikely to be a well-defined phospholipid bilayer. Interesting correlations between kinetics of transfer and fraction absorbed in humans were, however, observed. The technology was further improved by taking into account membrane retention and the derivation of differential equations to convert flux ratios into permeability values.The system is now available in the form of a commercial instrument (PSR evolution series, pION, Inc www.pion-inc.com). Improved correlations with GIT permeability were oteerved using different lipid compositions designed to closer mimic the nature of native membranes. ... 

The resulting coating composition has been designed with several advantages for the user ... 

In Malaysia, an Australian company, Talon, manufactures elegant, durable and weatherproof ultra lightweight tables and chairs from metallic coated carbon fiber incorporated in an epoxy matrix. Composite Design (Australia) also manufactures a range of lightweight furniture from cfrp. 

The design of suitable coating compositions is sometimes considered to be an art as well as a science, many of the developments have been carried out on a purely empirical basis. This is in part due to the lack of understanding of the relation between molecular structure of the monomer, curing conditions and properties of the... 

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