Composition for optical material, optical material and lenses

Details Composition for optical material, optical material and lenses Composition for optical material, optical material and lenses

2005-02-08

2005-02-08

Sanders, Kriellion A. (Department: 1714)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

C524S088000, C524S190000, C524S325000, C524S358000, C524S559000, C523S106000

Reexamination Certificate

active

06852780

ABSTRACT:
Disclosed are optical materials which effectively absorb UV light up to the long wavelength band, have low specific gravity, and have balanced properties including impact and heat resistances; lenses; and optical material compositions as their starting materials. The composition contains a polymerizable monomer material consisting of at least one di(meth)acrylate of formula (1):(R: CH3etc., Ph: a phenylene group; x, z: an integer of 1 to 5; y: 0 or 1) and at least one monomer (M) having at least one vinyl group in one molecule other than monomers of formula (1), and an additive selected from component (A1), (A2), or (B), or mixtures thereof, provided that components (A1) and/or (B) is contained, and when component (B) is contained, components (A1) and/or (A2) is also contained:(A1): a chlorinated benzotriazole UV absorber; (A2): a chlorine-free benzotriazole UV absorber; (B): a coloring agent having absorption maximum in 520-650 nm.

REFERENCES:
patent: 5621028 (1997-04-01), Lichtenstein et al.
patent: 6187844 (2001-02-01), Murata

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