Composition for optical material

Details Composition for optical material Composition for optical material

2005-11-01

2005-11-01

Gorr, Rachel (Department: 1711)

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

Synthetic resins

From reactant having at least one -n=c=x group as well as...

C351S159000

Reexamination Certificate

active

06960640

ABSTRACT:
The composition for optical materials of the present invention comprises a compound having in one molecule at least one structure represented by the following formula (1):wherein R1, R2, R3, R4, X, Y and n are as defined in the disclosure, an amine compound and an isocyanate compound. Resins obtained by curing the composition by polymerization are useful as well-balanced optical materials having a high impact resistance, a high refractive index and a sufficiently high Abbe's number.

REFERENCES:
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International Search Report dated Dec. 10, 2002 for PCT/JP02/08607.
Communication and Supplementary European Search Report dated Sep. 27, 2004, for No. EP 02 76 5353.

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