Back to results
US 12,552,902 B2Granted
Composition for optical material
AssigneeMitsubishi Gas Chemical Company, Inc.
InventorsMariko Sado, Kouhei Takemura, Hiroshi Horikoshi
Life of this patent
Estimating the term…
Abstract
A composition for an optical material contains (a) an episulfide compound, (b) a polymerization catalyst, and (c) an ester compound having a halogen at the α position. The (c) ester compound having a halogen at the α position is preferably at least one compound selected from the group consisting of dimethyl chloromalonate, diethyl chloromalonate, dimethyl bromomalonate, and diethyl bromomalonate.
Claims7
A composition for optical materials containing an episulfide compound (a), a polymerization catalyst (b), and an ester compound having a halogen at α position (c),
- wherein the ester compound having a halogen at α position (c) is a compound represented by formula (10):
- wherein:
- X represents a halogen;
- and R1 and R2 each independently represents a hydrocarbon having 1 to 10 carbon atoms.
1 more element
Dependencies are inferred from the claim text.