what is the process of formation of paint
Answers
Solventborne enamel paints, such as Resene Super Gloss, are based on alkyd resin dissolved in solvent (mineral turps). When the solvent evaporates the first stage is the formation of a tacky lacquer. The alkyd resin progressively reacts with oxygen from the atmosphere and polymerises to form a hard, tough coating.
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There are four main components in paint, they are resin, additives, solvent, and pigment. The resin is the binder that holds all the pigments together. It allows the product to adhere to the surface is it painted too. A water based paint uses acrylic emulsion polymers to bind. Common acrylic polymers come in a wide variety of types and combinations, such as methyl and butyl methacrylate. Inexpensive paints use polyvinyl acetate to bind.
Additives are used to enhance the properties of the substance. It makes it glide on the wall with a brush. It also makes it mold and scuff resistant. Without additives, the drying time would not be as fast as it is and there would be sag resistance. Solvents act as a carrier that helps bind the pigments and resin together. These agents can be organic, like mineral turps, or the manufacturer can use plain water.
Lastly, pigments are used to give paint its color and sheen. They are placed into two groups, prime and extender. The prime pigments will include colors like white, green oxide, yellow and red. In the other group of extenders, it includes calcium carbonate, talc, mica, and barytes to name a few.
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