Definition - What does Organosol mean?

Organosols are industrial coatings where resins such as polyvinyl chloride (PVC) are suspended or dispersed in an organic fluid. These coatings are not dissolved in the organic fluid but rather suspended in it. The dispersion technique is helpful because it allows the organosol coatings consisting of higher molecular weight insoluble resins to be used without using expensive solvents.

Corrosionpedia explains Organosol

Organosol coatings are available in a wide range of flow characteristics and consequently may be formulated for application by any of the conventional techniques. In these coatings, the fluid or the dispersant contains plasticizers along with a blend of volatile dilutents that help to impart organosols with the necessary fluidity, physical properties and speed of fusion.

When applied, organosols are generally limited to a thickness of 10 to 12 mils per coat. This is due to the substantial quantities of volatile diluents present. Rapid heating results in solvent blistering, whereas the reverse causes a mud-cracking effect.

Organosol coatings can be applied by the following methods:

  • Spread coating
  • Strand coating
  • Dip coating
  • Spray coating

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