Polymerizable composition and optical material produced therefrom
AssigneeSK Pucore Co., Ltd.
InventorsSeung Mo Hong, Jung Hwan Myung, Hyuk Hee Han, Jeongmoo Kim, Junghwan Shin
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Abstract
One embodiment relates to a polymerizable composition and an optical material produced therefrom which has excellent lightfastness and minimized color defects, and more specifically, the polymerizable composition according to one embodiment includes UV absorbers having, as the main absorption wavelength, either a long-wavelength region or a short-Wavelength region Within the UV region, wherein the UV absorbers do not absorb in the Visible light region. Accordingly, the polymerizable composition may be used to provide an optical material having excellent lightfastness and minimized color defects.
Claims17
A polymerizable composition, which comprises:
- at least one polythiol compound;
- at least one polyisocyanate compound;
- and
- at least two ultraviolet absorbers;
- wherein the at least two ultraviolet absorbers comprise at least one first ultraviolet absorber having a primary absorption wavelength (λ1) in a wavelength range of 320 nm to 350 nm;
- and
- at least one second ultraviolet absorber having a primary absorption wavelength (λ1′) in a wavelength range of 250 nm to 300 nm,
- wherein the first ultraviolet absorber further has another primary absorption wavelength (λ2) in a wavelength range of 290 nm to less than 320 nm, and the second ultraviolet absorber further has another primary absorption wavelength (λ2′) in a wavelength range of 320 nm to 350 nm.
Dependencies are inferred from the claim text.