Mercapto compound, a high refractive index resin and lens and a process for preparing them
AssigneeMitsui Toatsu Chemicals, Inc.
InventorsYoshinobu Kanemura, Katsuyoshi Sasagawa, Masao Imai, Toshiyuki Suzuki
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Abstract
The present invention relates to a mercapto compound, a process for preparing the mercapto compound, a process for preparing a polythiourethane base resin containing the mercapto compound, and a process for preparing plastic lenses containing the resin.
Claims9
A polythiourethane base resin comprising reacting a mercapto compound of the formula (I) ##STR20## with at least one ester compound selected from the group consisting of polyisocyanate compounds, polyisothiocyanate compounds and isothiocyanate compounds having a isocyanato groups.
A plastic lens comprising reacting a mercapto compound of the formula (I) ##STR21## with at least one ester compound selected from the group consisting of polyisocyanate compounds, polyisothiocyanate compounds and isothiocyanate compounds having a isocyanato groups.
A process for producing a plastic lens comprising mixing a mercapto compound of the formula (I) ##STR22## with at least one ester compound selected from the group consisting of polyisocyanate compounds, polyisothiocyanate compounds and isothiocyanate compounds having a isocyanato groups to form a mixture;
- casting and polymerizing the mixture to form a plastic lens.
Dependencies are inferred from the claim text.