Polyisocyanate compound, method for producing the same, and...

Details Polyisocyanate compound, method for producing the same, and... Polyisocyanate compound, method for producing the same, and...

2006-11-07

2006-11-07

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...

C560S347000, C560S355000, C351S159000

Reexamination Certificate

active

07132495

ABSTRACT:
The invention provides an optical material being excellent in balance between the heat resistance, Abbe number and refractive index by providing a compound represented by the general formula (1):in the formula, k and n representing integers of 0 to 2 and 0 to 1, respectively, with the proviso that k and n are not simultaneously zero, and k=0 meaning that —(CH2)k- is not included in the formula.

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Ulrich; Chemistry and Technology of Isocyanates; 1996; p. 341.

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