Plastic lens
AssigneeAsahi Kogaku Kogyo Kabushiki Kaisha
InventorNaoki Murata
Life of this patent
Estimating the term…
Abstract
A plastic lens is formed using a plastic lens composition which contains, as its main components, a resin material having a urethane-based resin, and at least one kind of UV absorbent selected from the group comprising 2-(5-methyl-2-hydroxyphenyl) benzotriazole, 2-(5-t-butyl-2-hydroxyphenyl) benzotriazole, 2-(5-t-octyl-2-hydroxyphenyl) benzotriazole, 2-(3, 5-di-t-butyl-2-hydroxyphenyl)-5-chlorobenzotriazole, 2-(3-t-butyl-5-methyl-2-hydroxyphenyl)-5-chlorobenzotriazole, 2-(3, 5-di-t-amyl-2-hydroxyphenyl) benzotriazole, and 2-(3, 5-di-t-butyl-2-hydroxyphenyl) benzotriazole. The total amount of addition of the UV absorbants is preferably in the range of 0.02 to 2.0 wt % relative to 100 wt % of the resin material.
Claims20
A plastic lens which is formed using a composition for plastic lens, the composition comprising, as its main components,:
- resin material having urethane-based resin component including a mercapto group containing compound and an isocyanate group containing compound, said mercapto group containing compound including pentaerythritoltetrakis (3-mercaptopropionate) and 4-mercaptomethyl-3, 6-dithio-1, 8-octanedithiol, and said isocyanate group containing compound including 2, 5 (2, 6)-bicyclo [2,2,1] heptanebis-(isocyanatemethyl) norbornanediisocyanatemethyl;
- and
- UV absorbent comprising at least one of 2-(5-methyl-2-hydroxyphenyl) benzotriazole, 2-(5-t-butyl-2-hydroxyphenyl) benzotriazole, 2-(5-t-octyl-2-hydroxyphenyl) benzotriazole, 2-(3, di-t-butyl-2-hydroxyphenyl)-5-chlorobenzotriazole, 2-(3-t-butyl-5-methyl-2-hydroxyphenyl)-5-chlorobenzotriazole, 2-(3, 5-di-t-amyl-2-hydroxyphenyl) benzotriazole and 2-(3, 5-di-t-butyl-2-hydroxyphenyl) benzotriazole.
A plastic lens which is formed using a composition for plastic lens, the composition comprising, as its main components,:
- resin material having urethane-based resin component including a mercapto group containing compound and an isocyanate group containing compound, said mercapto group containing compound including pentaerythritoltetrakis (3-mercaptopropionate) and 4-mercaptomethyl-3, 6-dithio-1, 8-octanedithiol, and said isocyanate group containing compound including m-xylylenediisocyanate;
- and
- UV absorbent comprising at least one of 2-(5-methyl-2-hydroxyphenyl) benzotriazole, 2-(5-t-butyl-2-hydroxyphenyl) benzotriazole, 2-(5-t-octyl-2-hydroxyphenyl) benzotriazole, 2-(3, di-t-butyl-2-hydroxyphenyl)-5-chlorobenzotriazole, 2-(3-t-butyl-5-methyl-2-hydroxyphenyl)-5-chlorobenzotriazole, 2-(3, 5-di-t-amyl-2-hydroxyphenyl) benzotriazole and 2-(3, 5-di-t-butyl-2-hydroxyphenyl) benzotriazole.
A plastic lens which is formed using a composition for plastic lens, the composition comprising, as its main components,:
- resin material having urethane-based resin component including a mercapto group containing compound and an isocyanate group containing compound, said mercapto group containing compound including pentaerythritoltetrakis (3-mercaptopropionate), and said isocyanate group containing compound including m-xylylenediisocyanate and 2, 5 (2, 6)-bicyclo [2,2,1] heptanebis-(isocyanatemethyl) norbornanediisocyanatemethyl;
- and
- UV absorbent comprising at least one of 2-(5-methyl-2-hydroxyphenyl) benzotriazole, 2-(5-t-butyl-2-hydroxyphenyl) benzotriazole, 2-(5-t-octyl-2-hydroxyphenyl) benzotriazole, 2-(3, di-t-butyl-2-hydroxyphenyl)-5-chlorobenzotriazole, 2-(3-t-butyl-5-methyl-2-hydroxyphenyl)-5-chlorobenzotriazole, 2-(3, 5-di-t-amyl-2-hydroxyphenyl) benzotriazole and 2-(3, 5-di-t-butyl-2-hydroxyphenyl) benzotriazole.
A plastic lens which is formed using a composition for plastic lens, the composition comprising, as its main components,:
- resin material having urethane-based resin component including a mercapto group containing compound and an isocyanate group containing compound, said mercapto group containing compound including 4-mercaptomethyl-3, 6-dithio-1, 8-octanedithiol, and said isocyanate group containing compound including m-xylylenediisocyanate and 2, 5 (2, 6)-bicyclo [2,2,1] heptanebis-(isocyanatemethyl) norbornanediisocyanatemethyl;
- and
- UV absorbent comprising at least one of 2-(5-methyl-2-hydroxyphenyl) benzotriazole, 2-(5-t-butyl-2-hydroxyphenyl) benzotriazole, 2-(5-t-octyl-2-hydroxyphenyl) benzotriazole, 2-(3, di-t-butyl-2-hydroxyphenyl)-5-chlorobenzotriazole, 2-(3-t-butyl-5-methyl-2-hydroxyphenyl)-5-chlorobenzotriazole, 2-(3, 5-di-t-amyl-2-hydroxyphenyl) benzotriazole and 2-(3, 5-di-t-butyl-2-hydroxyphenyl) benzotriazole.
Dependencies are inferred from the claim text.