Copal resins, thus creating alkyd varnishes that were much paler in colour. From these, the alkyds that are known today were developed. Alkyd resins may

Is a high styrene modified, fatty acid-based, medium oil alkyd resin. It exhibits very fast drying & good hardness, excellent pattern in hammertone paints and easy brushability and sprayability. It shows flexibility, high yellowing resistance and gloss. Is recommended for hammertone paints and rapid industrial paints. It is compatible with short oil alkyd resin, medium oil alkyd resin, aromatic hardeners, amino resins, maleic resins and aliphatic hardeners.

Short oil alkyd. Shows good hardness, gloss and color retention. Used in melamine baking enamel, lacquer.

Hydroxyl modified vinyl chloride/vinyl acetate copolymers. A high molecular weight copolymer resin containing approximately 81 percent vinyl chloride, 4 percent vinyl acetate, and 15 percent hydroxyalkyl acrylate, with the hydroxyl content at 1.8 percent. VAF has excellent adhesion on paper, polysulfone resin, acrylic resin, PVC, ABS, and PC. It has good compatibility with other film-forming material, such as alkyd resins, polyurethane elastomers, isocyanate resin, melamine resin, urea-formaldehyde, epoxy polymers and so on. The hydroxyl functional group permits crosslinking reactions for thermoset, obtaining excellent chemical and water resistance. It has applications in paper coatings, plastic coatings, inks.