What is Resin ? Resins are film forming materials used in the production of paints and coatings. It binds the pigment particles into a coherent film that adheres to the substrate. The quality of the resin used in the production of paints and coating decides the durability of the paint. Resins are used depending upon the functional properties of the paint.
Functions of Resin
To provide gloss and elasticity.
For the suspension of pigments.
To provide resistance to water, chemicals and abrasion.
Makes coating adhere to the surface.
Acts as a dispersant.
For drying properties.
Alkyd resins from the largest group of synthetic resins are used in paint industry. Most air drying enamels are based on long or medium oil alkyd resins. These resins dry at room temperature and have excellent flow and leveling properties, good exterior durability and can be thinned with mineral turpentine. Oils used for producing alkyd resins are linseed oil, soybean oil and Dehydrated Castor Oil (DCO).