Polymer for optical products and process for preparation...

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

C - Chemistry, Metallurgy

08

G

C08G 18/38 (2006.01) C08G 18/75 (2006.01) G02B 1/04 (2006.01) G02B 5/04 (2006.01) G02B 6/10 (2006.01) G11B 7/24 (2006.01)

Patent

CA 2077150

A polymer used for optical products wherein the polymer comprises 2,5-dimethyl-1,4-dithiane skeletons represented by formula (1): Image and 1,3,5-trimethylcyclohexane skeletons represented by formula (2): Image 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°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.

Polymère utilisé pour les produits optiques, lequel comporte un squelette de 2,5-diméthyl-1,4-dithiane, représenté par la formule (1) Image et un squelette de 1,3,5-triméthylcyclohexane, représenté par la formule (2) Image , une partie de toutes les liaisons entre le squelette de 2,5-diméthyl-1,4-dithiane et celui de 1,3,5-triméthylcyclohexane étant constituée par des liaisons thio-uréthane. Le polymère possède un indice de réfraction de 1,63 ou plus, un nombre d'Abbe de 35 ou plus et un point de transition de second ordre de 100 degrés C ou plus. Le polymère est préparé par polyaddition de 2,5-dimercaptométhyl-1,4-dithiane et de 1,3,5-triisocyanatométhylcyclohexane.

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