Plastic lens
AssigneeHoya Corporation
InventorsShinsuke Itoh, Masahisa Kousaka
Life of this patent
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Abstract
A plastic lens having excellent weather resistance, formed by polymerization of a composition containing a polyisocyanate compound having an aromatic ring and a polythiol compound is provided. The plastic lens is formed by polymerization of a composition that contains 100 parts by mass in total of (A) a polyisocyanate compound containing a polyisocyanate compound having an aromatic ring and (B) a polythiol compound, from 0.5 to 5.0 parts by mass of (C) a benzophenone compound having a hydroxyl group on at least the ortho position, and from 0.5 to 5.0 parts by mass of (D) a phenol compound.
Claims8
A plastic lens formed by polymerization of a composition that comprises:
- 100 parts by mass in total of (A) a polyisocyanate compound having an aromatic ring and (B) a polythiol compound,
- from 0.5 to 5.0 parts by mass of (C) a benzophenone compound having a hydroxyl group on at least the ortho position, and
- from 0.5 to 5.0 parts by mass of (D) a phenol compound.
Dependencies are inferred from the claim text.