is a solid or semi-solid materials, light yellow to dark
brown, composed of carbon, hydrogen, and oxygen. Resins occur naturally in
plants, and are common in pines and firs, often appearing as globules on the
bark. Synthetic resins, such as polystyrene,
polyesters, and acrylics (see
acrylic resin), are derived primarily from
petroleum. Resins are widely used in the
manufacture of inks, lacquers, varnishes, plastics, adhesives, and
rubber.
Also see plastisols and
organosols.