Hydroxyl-modified vinyl chloride/vinyl acetate copolymers are compatible with other film-forming resins, such as alkyds, urethane elastomers, isocyanate resins, epoxy polymers, and urea and melamine resins. As a result, hydroxyl-modified vinyls are often formulated with these and other film-forming materials to improve coating properties, such as adhesion, flexibility, toughness, hardness, and chemical resistance.
Hydroxyl-modified resins are often used to impart snap-dry properties to a coating. The hydroxyl functionality permits crosslinking reactions for thermoset coating systems that exhibit outstanding chemical and water resistance. Coatings based on these resins also have good adhesion to wash primers, metals, wood, and many plastic substrates.
