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Coatings.

Coatings.

  • Painting and coating are interchangeable terms but basically painting is done for decoration and coating is done for protection.
  • The polymeric coatings are applied to elastomers, metals, ceramics and other polymeric materials.
  • Examples of polymeric coatings are natural and synthetic rubbers, urethanes, PVC, phenolic resins, acrylics, silicone and nitrocellulose.
  • They are the polymers which provide surface that are both hydrophobic and oleophobic and make substances like adhesives and food ingredients non sticky.
  • They are FDA approved.
  • Polymeric coating are made from polymeric materials and are applied to different substrates using different techniques such as dispersion/ extrusion coating and solution application.
  • These coating are done for corrosion resistance.
  • They must adhere well to substrate and must not degrade by heat, moisture and chemicals.
  • Acrylics and alkyds are used as corrosion resistant coating for farm equipment and industrial products.
  • Polyurethanes are used as abrasion resistant coating for aeroplanes and motorcycle parts.
  • Nylon-11 coating is used for attractive appearance, protection from chemicals and  abrasion.

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