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Patent Searching and Data


Title:
ORGANIC GLASS FOR OPTICAL PART
Document Type and Number:
WIPO Patent Application WO/1992/007888
Kind Code:
A1
Abstract:
An organic glass for optical parts, mainly comprising a copolymer of (a) diallyl diphenate and (b) a urethane acrylate produced by preparing a linear polyurethane hydroxylated at both terminals by the reaction of a diisocyanate component with a diol component and introducing vinyl groups into both the terminals of the polyurethane by the reaction with acrylic or methacrylic acid. It has a high refractive index and is excellent in various properties such as transmittance and impact resistance, so that it can be applied to optical parts to which only inorganic glass has been applicable.

Inventors:
Torii
Tadashi, Makino
Kazuo
Application Number:
PCT/JP1991/001481
Publication Date:
May 14, 1992
Filing Date:
October 30, 1991
Export Citation:
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Assignee:
Itoh
Optical
INDUSTRIAL
CO., LTD.
Torii, Tadashi
Makino, Kazuo
International Classes:
C08F290/00; C08F290/06; C08F299/06; G02B1/04; (IPC1-7): C08F299/06
Foreign References:
JPH02251533A
JPH02251528A
EP0209124A2
Other References:
See also references of EP 0510207A1
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