Optical urethane resin

Details Optical urethane resin Optical urethane resin

1994-05-13

1996-11-19

Seidleck, James J.

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...

528 44, 528 49, 528 65, 528 66, 351159, 351160R, C08G 1832

Patent

active

055764126

ABSTRACT:
An optical urethane resin is obtained by reacting a polyiso(thio)cyanate compound having a hydrolyzable chlorine content of not greater than 300 ppm with an active hydrogen compound. There is provided an optical urethane resin with a minimum of coloration, a high total light transmittance and free of optical distortion.

REFERENCES:
patent: 4689387 (1987-08-01), Kajimioto et al.
patent: 4904704 (1990-02-01), Nafziger et al.
patent: 4996351 (1991-02-01), Nafziger et al.
patent: 5194559 (1993-03-01), Okazaki et al.

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