Optical Monomers and Coatings
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Optical Coatings

Hi-Gard coatings



PPG's Hi-Gard lens coating solution is cured to form a scratch resistant coating on ophthalmic lenses made from plastic materials. Hi-Gard coatings are low viscosity solutions which are applied by conventional dip and spin coating methods.


Hi-Gard lens coating is easy to process and can be used with standard dip and spin coating equipment and air circulating ovens. Application of the product results in a coating of uniform thickness (2-4 microns) on the lens. Hi-Gard lens coating is resistant to acetone, isopropyl alcohol and other commonly used eyewear cleansers. The optical quality of plastic lenses is maintained and lenses coated with Hi-Gard lens coating are four to six times more abrasion resistant than uncoated lenses made from CR-39® monomer.

  • Easy to process – use standard dip and spin coating equipment and air circulating ovens/infrared.
  • Chemical resistance – resistant to acetone, isopropyl alcohol and other commonly used eyeglass cleaners. 
  • Scratch resistance – exhibit lower haze gain after abrasion testing.


Hi-Gard 1080S Coating

  • Non-tintable coating for CR-39®, Trivex®. polycarbonate, nylon and mid-index lenses
  • Refractive index of 1.51
  • Thermal cure
     

Hi-Gard 1080T Coating

  • Tintable coating for CR-39®, Trivex®, polycarbonate, nylon and mid-index lenses
  • Less brittle to allow for higher film thicknesses without cracking
  • Refractive index of 1.51
  • Thermal cure


Hi-  Gard 1600MT2 Coating 

  • Non-tintable coating for high index substrates with improved QUV durability
  • Refractive index of 1.58
  • No need for primer; excellent adhesion on high index substrates (including 1.60, 1.67 and 1.74)
  • Thermal cure