Polymer for optical products and process for preparation thereof

Details Polymer for optical products and process for preparation thereof Polymer for optical products and process for preparation thereof

1992-08-28

1994-03-15

Michl, Paul R.

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

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

528 76, 528 77, 528 78, C08J 300

Patent

active

052946665

ABSTRACT:
A polymer used for optical products wherein the polymer comprises 2,5-dimethyl-1,4-dithiane skeletons represented by formula (1): ##STR1## and 1,3,5-trimethylcyclohexane skeletons represented by formula (2): ##STR2## and a part of or all of bonds between the 2,5-dimethyl-1,4-dithiane skeleton and the 1,3,5-trimethylcyclohexane skeleton are thiourethane bonds. The polymer exhibits 1.63 or more of refractive index, 35 or more of Abbe's number and 100.degree. C. or more of second-order transition point. The polymer is prepared by polyaddition of 2,5-dimercaptomethyl-1,4-dithiane and 1,3,5-triisocyanatomethylcyclohexane.

REFERENCES:
patent: 2900392 (1959-08-01), Remes
patent: 5084545 (1992-06-01), Nagata et al.

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