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Title:
COMPOSITION FOR HIGH REFRACTIVE INDEX PLASTIC LENS AND LENS
Document Type and Number:
Japanese Patent JP3328115
Kind Code:
B2
Abstract:

PROBLEM TO BE SOLVED: To obtain a colorless and transparent lens having high refractive index, high heat resistance, low dispersion and lightweight, excellent in weather, impact and heat resistances, low in hygroscopicity and excellent in surface hardness.
SOLUTION: A composition comprising (a) a component containing 1, 3- dithiolane-4, 5-diisocyanate and (b) a component containing at least one kind of 2, 2-bis(mercaptomethyl)-1, 3-propanediol, 1, 2, 4-tris(mercaptomethyl)benzene, and 1, 2-bis[(2mercaptoethyl)thio]-3-mercaptopropane is polymerized to give a lens.


Inventors:
Kawauchi, Keiya
Sasagawa, Katsuyoshi
Kobayashi, Seiichi
Application Number:
JP1995000230368
Publication Date:
September 24, 2002
Filing Date:
September 07, 1995
Export Citation:
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Assignee:
MITSUI TOATSU CHEM INC
International Classes:
G02C7/02; C07D339/06; C08G18/30; C08G18/38; C08G18/72; C08G18/77; G02B1/04; (IPC1-7): C08G18/77; C07D339/06; C08G18/38; G02B1/04; G02C7/02
Attorney, Agent or Firm:
金田 暢之 (外2名)