Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Ophthalmic lenses or blanks
Patent
1979-10-01
1982-03-16
Robinson, Ellis P.
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
Patent
active
043198112
ABSTRACT:
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.
REFERENCES:
patent: 3922440 (1975-11-01), Wegworth
patent: 3968305 (1976-07-01), Oshima
patent: 4013825 (1977-03-01), Denzinger
patent: 4026826 (1977-05-01), Yoshida
patent: 4135007 (1979-01-01), Lorenz
patent: 4158647 (1979-06-01), Azorlosa
patent: 4190681 (1980-02-01), Hall
patent: 4195103 (1980-03-01), Chang
patent: 4199421 (1980-04-01), Kamada
patent: 4205139 (1980-05-01), Barzynski
Lorenz Donald H.
Tu Shu-Tung
GAF Corporation
Magee Jr. James
Parker Sheldon H.
Robinson Ellis P.
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