Low-birefringent organic optical component and a spirobiindan po

Details Low-birefringent organic optical component and a spirobiindan po Low-birefringent organic optical component and a spirobiindan po

1997-07-17

2000-06-27

Truong, Duc

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528196, 528198, 528298, C08G 6400

Patent

active

060808330

ABSTRACT:
A low-birefringent organic optical component comprising a polymer prepared by polymerizing a racemic mixture of the monomer with an asymmetric spiro ring represented by general formula (1) as an essential ingredient; wherein ring A represents a monocyclic or polycyclic organic group, wherein two ring As are mutually bound each other via a spiro bond to form a spiro ring which has a molecular asymmetric structure; n is an integer of 0 to 10; X.sub.1 and Y.sub.1 are binding groups; and Z.sub.1 is a polymerization-active group. The component has excellent transparency, mechanical strength and heat resistance, as well as a low birefringence.

REFERENCES:
patent: 4734482 (1988-03-01), Tamai et al.
Patent Abstracts of Japan, vol. 15, No. 398 (C-0874), Oct. 9, 1991 & JP03162413A (Idemitsu Kosan Co. Ltd.), Jul. 12, 1991, *abstract*.

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