Solvent Based Binders - are synthetic polymers that are dissolved in a solvent. These can vary from alkyds to high performance polymers such as epoxies and urethanes. Solvents - are liquids used to dissolve a polymer and reduce the viscosity in paint. They also control the rate of drying and therefore the ability of a paint to flow and level. Ti02 is an inorganic pigment, which is used by the industry to provide whiteness and excellent opacity.
Color pigments are either organic or inorganic.
The black, yellow and red iron oxides are popular natural occurring prime pigments. The organic prime pigments are synthetically produced requiring well-controlled process conditions. These pigments can be 5 to 10 times the cost of the inorganic natural colored pigments. Typical examples of these pigments are copper phthalocyanine, blue and green pigments, naphthol reds, hansa yellows and quinacridone violets. Extender - are pigments used primarily to reduce the cost of paint by replacing part of the more expensive binder of Ti02.