Method for dirtproofing treatment for plastic lens

G - Physics – 02 – B

Patent

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117/113, 117/213

G02B 1/10 (2006.01) G02B 1/11 (2006.01)

Patent

CA 1315617

ABSTRACT OF THE DISCLOSURE A method is disclosed which concerns the treatment for imparting dirtproofness to a plastic lens provided in advance on the surface thereof with an antireflection film formed by vacuum evaporation of an inorganic substance. This method forms a dirtproofing film on the antireflection film by mixing a polyfluoroalkyl silane-containing coating liquid and trichlorotri- fluoroethane and boiling the resultant mixutre, dip coating the plastic lens in the boiled mixture, then treating the dip coated plastic lens with the vapor of fluoroethane, subsequently drying the wet plastic lens with hot air, and optionally immersing the dried plastic lens in water.

581048

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