IN287049: A process for the preparation of inorganic-organic hybrid sols for the deposition of antireflection coatings on plastic substrates

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Optically clear AR coatings on previously hard-coated plastic ophthalmic lenses and sheets have been developed following a two-layer (high and low index) quarter-wavelength coating design followed by deposition of one hydrophobic layer on top and cured by thermal and UV curing. High-index coating sol based on "SiO2-TiO2-PEO" or "SiO2-ZrO2-PEO" and low-index sol based on "SiO2-PEO" organic-inorganic polymeric networks have been used for the deposition of such AR coatings. About 98% of transmissions (reflective loss minimized to

Patent No:: IN287049
Application No:: 1898DEL2009
Filing Date:: 15-09-2009
Issue Date:: 04-09-2017
Applicant:: CSIR–Central Glass & Ceramic Research Institute (CSIR–CGRI), kolkata
Inventor(s):: De Goutam, De Sucheta, Medda Samar Kumar
IPC Classification:: C08B
Country:: India

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