Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Ophthalmic lenses or blanks
Patent
1987-02-25
1988-01-26
Henderson, Christopher
Optics: eye examining, vision testing and correcting
Spectacles and eyeglasses
Ophthalmic lenses or blanks
5262923, 526296, G02C 702
Patent
active
047213779
ABSTRACT:
A plastic lens formed from a copolymer of three components. A first component which is a vinyl monomer having a nucleus-halogen-substituted aromatic ring. A second component which is selected from at least one member of the group consisting of aliphatic diacrylate, dimethacrylate, triacrylate, and trimethacrylate. A third component is chosen from mono-acrylate or mono-methacrylate having a nucleus-halogen substituted aromatic ring. The components are present in the weight ratio of 20/15/0 to 85/80/60 weight percent, respectively.
REFERENCES:
patent: 4243790 (1981-01-01), Foley, Jr.
patent: 4306780 (1981-12-01), Tarumi
patent: 4487904 (1984-12-01), Fukuda et al.
Fukuda Tadanori
Saito Masami
Sakamoto Sadayuki
Henderson Christopher
Toray Industries Inc.
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