Cast molding material for plastic lens and process for the production of plastic lens
AssigneeHoya Corporation
InventorsAkiko Shimizu, Yukio Kageyama, Shigeo Nakamura
Life of this patent
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Abstract
A cast-molding material for a plastic lens which is almost free from causing defective dyeing when dyed, and a process for producing plastic lenses almost free from causing defective dyeing, the cast-molding material containing, as essential components, a combination of (A) diethylene glycol bisallylcarbonate or a mixture of diethylene glycol bisallylcarbonate and a monomer copolymerizable therewith, with (B) a polyether-modified silicone compound, and the process comprising cast-molding the above cast-molding material in a mold.
Claims5
A cast-molding material for a plastic lens, which contains, as essential components, a combination of (A) diethylene glycol bisallylcarbonate or a mixture of diethylene glycol bisallylcarbonate and a monomer copolymerizable therewith, with (B) an effective amount of from 0.1 to 10,000 ppm by weight, based on component (A), of a polyether-modified silicone compound.
Dependencies are inferred from the claim text.