Highly-refractive plastic lens
First Claim
1. A plastic lens which comprises a copolymer of (A) 20 to 85 percent by weight of dibromostyrene with (B) 15 to 80 percent by weight of at least one member selected from the group consisting of aliphatic diacrylate, dimethacrylate, triacrylate and trimethacrylate, and (C) less than 60 percent by weight of mono-acrylate, or monomethacrylate having a nucleus-halogen substituted aromatic ring, said copolymer being in the form of a lens.
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Accused Products
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.
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Citations
8 Claims
- 1. A plastic lens which comprises a copolymer of (A) 20 to 85 percent by weight of dibromostyrene with (B) 15 to 80 percent by weight of at least one member selected from the group consisting of aliphatic diacrylate, dimethacrylate, triacrylate and trimethacrylate, and (C) less than 60 percent by weight of mono-acrylate, or monomethacrylate having a nucleus-halogen substituted aromatic ring, said copolymer being in the form of a lens.
Specification