Title:
ORGANIC GLASS FOR HIGHLY REFRACTIVE OPTICAL MATERIAL
Document Type and Number:
Japanese Patent JP3573353
Kind Code:
B2
Abstract:
PURPOSE: To obtain the subject glass excellent in impact resistance and transparency and useful as lenses, etc., of eyeglasses by copolymerizing raw materials containing diallyl terephthalate, etc., and a specific bromine-containing allyl ester oligomer and prepared so as to provide a prescribed viscosity and a prescribed refractive index.
CONSTITUTION: This glass is obtained by copolymerizing a raw material which is a bromine-containing allyl ester oligomer, having a structure expressed by the formula [A is 1-20C bivalent organic residue; B is bivalent organic residue derived from a diol having one or more bromines; (n) is 1-20], containing diallyl terephthalate monomer and/or diallyl isophthalate monomer and/or diallyl phthalate monomer and prepared so as to provide 50-2000 cP viscosity at 30°C and 1.53-1.58 refractive index.
Inventors:
Hiroyuki Uchida
Yasushi Tanaka
Yasushi Tanaka
Application Number:
JP19881493A
Publication Date:
October 06, 2004
Filing Date:
July 19, 1993
Export Citation:
Assignee:
SHOWA DENKO K.K.
International Classes:
C08F218/14; C08F18/14; C08F18/18; C08F218/18; C08F290/00; C08F290/06; G02B1/04; G02C7/02; G11B7/24047; G11B7/2533; (IPC1-7): C08F218/14; C08F218/18; C08F290/06; G02B1/04; G02C7/02
Domestic Patent References:
| JP5170702A | ||||
| JP5202133A | ||||
| JP5264931A | ||||
| JP5331272A |
Attorney, Agent or Firm:
Teruo Akimoto
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