Abrasion-resistant tintable coating

Details Abrasion-resistant tintable coating Abrasion-resistant tintable coating

2009-02-17

2011-10-11

Berman, Susan W (Department: 1765)

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Ophthalmic lenses or blanks

C351S162000, C522S015000, C522S170000, C523S106000, C428S412000

Reexamination Certificate

active

08033663

ABSTRACT:
A curable coating composition includes:a) at least one monomer chosen from polyol poly(meth)acrylate monomers having from 3 to 6 (meth)acrylate functions,b) at least one monomer chosen from polyol polyglycidyl ethers having at least three epoxy functions,c) at least one difunctional monomer,d) at least one free-radical photo-initiator, ande) at least one cationic photo-initiator,wherein the molar ratio of acrylate equivalents to epoxy equivalents in the composition ranges from 3:1 to 4:1, and wherein the composition is free of silica and of monomers bearing a silane function. A method for coating a substrate, such as an ophthalmic lens, with this composition, and the coating substrate thus obtained are also disclosed.

REFERENCES:
patent: 6100303 (2000-08-01), Hirotani et al.
patent: 7067565 (2006-06-01), Valeri et al.
patent: 7452611 (2008-11-01), Blackburn et al.
patent: 2006/0228560 (2006-10-01), Stewart et al.
patent: 2007/0238804 (2007-10-01), Ho et al.
patent: 2007/0275171 (2007-11-01), Dang et al.

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