Use of Alkyd Resin in Paints and Coatings Alkyd Resin is a complex oil modified polyester that serves as a fil forming agent in some paints and clear coatings. They are used in many protective coatings with good weathering properties and used as important ingredients in many synthetic paints, varnishes and enamels due to versatility and low cost. Alkyd resins form the largest group of synthetic Resins available to the paint Industries and consumption is greater than that of any other resins. Alkyds are compatible with most of the resins used in paint industries like Rosin, phenolic Resin, Amino resin, polyurethanes etc. so it can be easily modified to achieve specific properties. Varnishes and Enamels based on modified alkyd resin are used for painting railroads cars, airplanes, agricultural machines etc. Enamels for painting automobiles, bicycles, and various instruments and equipment are obtained from compositions of alkyd resins with urea-formaldehyde and melamine-formaldehyde resins. Application of Alkyd Resin • • • • • • •
Alkyd Resin are important ingredient in many Synthetic paints, varnishes and enamels. Principal applications are furniture and architectural coatings, product finishes Special-purpose coatings and automotive refinishing primers Used as binders for metal decorating inks. Industrial baking enamels, such as those for appliances, coil coatings, and automotive finishes. Used in Flat Wall Paint Alkyd modified silicon resins include heat-resistant paints, and marine coatings and insulation varnishes.
Alkyd Resin for Paints The polymer structure of the alkyd resins makes them particularly suitable to be used as a basis for enamels and paints with different specification. The paints based on Alkyd Resin have been using long years in the field of construction industry and still today we have wide variety of applications for both external and internal use. The specific properties of the various types of alkyd resins for paints available on the market are due to the type of chemical reagents used in the production reaction. Alky Resin Based Paints categorized on the volume of oil present in it 1. Low concentration paint (30% to 40%)