Paint viscosity

Use of application methods that can use relatively high-viscosity paints is advantageous. Appropriate methods include roller coating, special electrostatic spray equipment, hot-spray techniques, and two-nozzle spray guns. 

Saturated paint polyester resins are soluble in esters, ketones, and in some cases aromatic hydrocarbons, but are insoluble in aliphatic hydrocarbons and alcohols. Solvent-containing paints based on high molecular mass resins have solids contents of 35-50 wt% at application viscosity. Paint solids contents for low molecular mass polyesters are 50-70 wt%. 

High-viscosity paints can be trained workforce required industrial coating... 

Immersed Body Method (DIN 53 217 T 3). The density is calculated from the buoyancy of spherical bodies immersed in the paint. This method is used for low- and medium-viscosity paints and is particularly suitable for production control. 

Paints have widely differing viscosities that depend on their application conditions low-viscosity paints are processed by dipping and spraying methods, while high-viscosity paints are used in casting, rolling, and hot-spraying methods. The correct choice of solvents serves to optimize the paint properties [14.200], [14.201]. 

CandeHIa Wax S-Nauba 1-80 S-Nauba 1-120 S-Nauba 1 Flake S-Nauba 3-80 S-Nauba 3-120 S-Nauba 3 Flake S-Nauba 5021 wax, low-viscosity paints/coatings MIcropro 400 MIcropro 500 MIcropro 600 Micropro 600VF... 

Paints or lacquers are composites of, in general, three components pigments, binders, and solvents. Depending on application, the nature of the pigment can vary between extremely wide limits (see also Chapter 34). The binders are also known as film formers they are exclusively polymers or prepolymers, that is, thermoplasts, thermosets, elastomers, and elastoplasts. The nature of the solvent can also vary within wide limits according to the type of film former and the desired application. Here, solvents are described as good in the paints industry when they lead to low-viscosity paints or lacquers. Such good solvents are usually poor solvents in the thermodynamic sense (see also Chapters 4 and 6). 

In an airless spray system high pressure is supplied to the paint which is forced through a high pressure resistant hose and airless spray gun. High viscosity paints are warmed before spraying. This technique has the following advantages over the air spray system ... 

Antilbam PA 49 F Antifoam PA 49 antifbam, med.-to-high-viscosity paints... 

Mixing machines for polymers vary from ball-and-pebble mills that disperse pigments in low-viscosity paints over periods of hours and days to heavy internal mixers (see Section 13.3) that may use 1500 hp (about 1100 kW) to disperse 100 kg of carbon black in 200 kg of rnbber in about 10 min. 

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