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US 5,807,975 AGranted
Alkyl sulfide type episulfide compound
AssigneeMitsubishi Gas Chemical Company, Inc.
InventorsAkikazu Amagai, Motoharu Takeuchi, Kenichi Takahashi
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Abstract
An alkyl sulfide type episulfide compound represented by the following general formula (I) or (II) is herein disclosed: ##STR1## A material obtained by polymerizing/curing the above-mentioned compound is desirable as an optical material for various purposes, particularly a lens material for spectacles.
Claims15
An alkyl sulfide type episulfide compound represented by the formula (I) or (II) ##STR15## in the formula (I), m is an integer of 1 to 6;
- n is an integer of 0 to 4;
- each X is S or O, and the ratio of S is independently, on the average, 50% or more of the total of S and O constituting a three-membered ring;
- and in the formula (II), x is an integer of 0 to 1;
- y is an integer of 0 to 4;
- z is an integer of 0 to 4;
- u is an integer of 0 to 1;
- v is an integer of 0 to 3;
- the relation of x+y+z+u=4 is met;
- and E.sub.ps is a ##STR16## group, wherein X is the same as X in the formula (I).
6 more elements
Dependencies are inferred from the claim text.