Optical materials composed of resin from thioacrylat esters
AssigneeNippon Shokubai Kagaku Kogyo Co., Ltd.
InventorsTatsuhito Matsuda, Yasuaki Funae, Masahiro Yoshida, Tsuguo Takaya
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Abstract
A process for producing a resin having a high refractivve index which comprises radically polymerizing a material monomer, characterized in that said material monomer comprises [I] at least one polymerizable monomer selected from the group consisting of a polyfunctional thioacrylate and a polyfnctional thiomethacrylate (as an indispensable component), and optionally [II] at least one other polymerizable monomer which is radically polymerizable with said polymerizable monomer [I], a resin having a high refractive index produced by said process and optical materials, especially lenses and disk substrates prepared from said resin.
Claims5
An optical material prepared from a resin having a high refractive index produced by radically polymerizing a material monomer, said material monomer comprising:
- [I] at least one polymerizable polyfunctional thioacrylate or polyfunctional thiomethacrylate represented by the general formula (1) ##STR5## wherein R.sub.1 and R.sub.2 represent H or CH.sub.3, R.sub.3 and R.sub.4 independently represent H, CH.sub.3 or OH, k and m independently represent an integer of 1 to 5, and 1 and n independently represent 0 or an integer of 1 to 4,
- the general formula (2) ##STR6## wherein R.sub.1, R.sub.2 and k are the same as defined in the general formula (1), and X represents 0 or S, or
- the general formula (3) ##STR7## wherein R.sub.1 and R.sub.2 are the same as defined in the general formula (1), and R.sub.5 represents a phenylene group, a xylylene group, a nucleus-substituted phenylene group or a nucleus-substituted xylylene group;
- and
- optionally [II] at least one other polymerizable monomer which is radically polymerizable with said polymerizable monomer [I].
Dependencies are inferred from the claim text.