Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Ophthalmic lenses or blanks
20415923, 427 541, 428411, 428412, 428441, 428442, 428461, 428463, 428507, 428510, 428513, 428514, 428516, 428500, 428522, 428523, 428520, G02C 702, B32B 2730
The invention relates to a radiation curable coating which provides superior abrasion and chemical resistance and excellent adhesion properties. The coating is produced by radiation curing. A first monomer selected from the group consisting of triacrylates and tetracrylate mixed with a second monomer having an N-vinyl imido group, preferably an N-vinyl lactam, such as vinyl pyrrolidone or vinyl caprolactam. The monomer mixture is substantially oligomer-free and if the radiation is ultraviolet light, a photoinitiator, preferably p-phenoxydichloro acetophenone or dimethoxyphenyl acetophenone, is included in the mixture.
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Lorenz Donald H.
Magee Jr. James
Parker Sheldon H.
Robinson Ellis P.
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