Paints, types

Fig. 1. Formulation types where each number represents the percent of pigment volume concentration for the paint types shown.

Compatible with wide range of paint types/raw materials... 

To explain the working mechanisms of an antifouling paint we will here use the well-known tributyltin (TBT)-based paint. The reason for this is that this paint type has been thoroughly characterised over the years (Kiil et al., 2001, 2002a,b,c, 2003). Other modem antifouling paints appear to have similar working mechanisms (Yebra et al., 2004). 

Paints are specially formulated for specific purposes and locations. Following is a brief description of the most popular paint types ... 

Some of the paint types belonging to classes such as alkyds, coaltar epoxies, epoxy, heat-resistant, inorganic zinc types, polyurethanes, water-borne coatings as described by Sigma coatings are given in Table 1.29. 

Table 1.29 Paint types, applications and properties (courtesy of Sigma Coatings).75(Reproduced from Corrosion for Science and Engineering, Tretheway and Chamberlain, Copyright Pearson Education Ltd)... 

Paint type Percent solids content by volume (approx.) Optimum dry film thickness (pm) Touch dry after Time before overcoat Uses and properties... 

Through the years, improved paints have been developed because of competition from environmental and consumer activists. The objective of improving overall quality and reducing emissions of VOCs has led to a wider selection of paint types. The user, therefore, must select a coating type that meets the cost of required application, equipment, energy costs for using, pollution and waste collection expenses, and application and cured performance requirements of the coating. 

Brush and mop application-used for thick paint-type coatings and for hot asphalt. 

Although there are many varieties of paint in use, Haynie (6) has chosen to simplify them into two types according to the composition of the extender, or thickener. Of the two paint types, the more pollutant-resistant contains silicate extenders while older, carbonate extender paints are less pollutant-resistant. Silicate extender paints have become dominant in the exterior paint market only in the last decade, accounting for most (probably over 80 percent) of current sales. The proportion of silicate paint on buildings is unknown, however, but is conservatively assuned to be 85 percent. The switch to silicate paints may have occurred partially as a result of concern with the ervironmental susceptibility of the carbonate extender paints. Tliese substitution costs are not factored into the damage estimates provided in this analysis. 

Basic Operations in Paint Manufacture Oil Absorption and the Milling Process Bulk Properties of Paints Types of Mills for Paint Manufacture Stone and Colloid Mills Roller Mills Ball and Pebble Mills Sand Mills... 

Products and Uses Found in lacquers, inks, and stains as a solvent in paint-type products. 

Products and Uses Wall coatings and paint-type products produced from lime and water mixtures. It is an antiseptic coating for bams and chicken houses... 

Paint colour Paint type Solar condition good Absorption condition poor... 

Break-in tools used to gain access to premises may well carry traces of paint that have abraded from painted surfaces at the point of entry. Commonly encountered household paint types include polyvinyl acetate (PVA), acrylics, alkyd enamels, epoxies, and chlorinated rubbers. Py-GC can distinguish between these different classes (Figure 8.4). 

For the paint solvent application, a slipstream of a paint booth vent located at Fort Carson was analyzed to determine the components present with rapid scan gas chromatograph. On any operational day, several paint types are sprayed. The solvent emissions content thus varies during painting operations. In general, the amounts and types of solvent emissions from the Fort Carson paint booth are listed in Table 22.4.2. 

A second area where this type of question is of crucial importance is in forensic science. Infrared spectroscopy and, particularly, infrared microscopy are key techniques used for identification and comparison of fibers and paint types. 

There are a large number of standard test methods available for paints to ensure that specific performance criteria are met. The most widely used standards originate from the American Society for Testing and Materials (ASTM), British Standards Institution (BSI), Deutsche Institut fiir Normung (DIN), and the International Organization for Standardization (ISO). The methods used will depend on the paint type and intended application. A selection of methods is described below that are likely to be used for water-based coatings. 

Many paint-type encapsulants do not allow tint changes after they leave the factory, and cannot offer dark colors, because the extra pigments can undermine the chemical shielding properties of the encapsulants, which have twice or more the solid content as even the best paints. It is possible to paint over most of them. Tints and most colors may be ordered for most paint-type encapsulants. 

Some paint-type encapsulants can be used with scrims or fabric meshes for extra toughness, durability, and abrasion resistance. 

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