Title:
HIGH-REFRACTIVE INDEX OPTICAL RESIN
Document Type and Number:
Japanese Patent JPH0341110
Kind Code:
A
Abstract:
PURPOSE:To provide a high-refractive index optical resin excellent in optical transparency, heat resistance, solvent resistance, impact resistance, etc., by copolymerizing a specified N-substituted benzothiazoline-2-thione monomer with a vinyl monomer. CONSTITUTION:An N-substituted benzothiazoline-2-thione monomer of formula I (wherein R is formula II, III, IV, V or VI), e.g. N-vinylbenzothiazoline-2-thione, is copolymerized with another vinyl monomer (e.g. styrene or methyl methacrylate). In this way, a high-refractive index optical resin having a refractive index >=1.6 and a low specific gravity and suited for spectacle lenses, camera lenses, etc., can be produced. The compound of formula I can be synthesized by, e.g. a rearrangement reaction of, e.g. 2-alkylthiobenzothiazole.
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Inventors:
MIYAZAKI TAKESHI
AMAYA NAOYUKI
ANAMI KEIZO
MURATA TAKASHIGE
AMAYA NAOYUKI
ANAMI KEIZO
MURATA TAKASHIGE
Application Number:
JP17567689A
Publication Date:
February 21, 1991
Filing Date:
July 10, 1989
Export Citation:
Assignee:
NIPPON OILS & FATS CO LTD
International Classes:
G02B1/04; C08F12/00; C08F18/02; C08F28/00; C08F212/32; C08F218/10; C08F218/12; C08F228/06; (IPC1-7): C08F212/32; C08F218/10; C08F218/12; C08F228/06; G02B1/04
Attorney, Agent or Firm:
Hajime Sakai (2 outside)
Next Patent: JPH0341111