Optical material

Details Optical material Optical material

1991-08-19

1993-05-04

Schofer, Joseph L.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C08F 2240

Patent

active

052083071

ABSTRACT:
An optical material, comprising a resin composed of a polymer constituted of 10 of 95 mol %, based on the polymer, of a first structural unit represented by the formula (I) and 90 to 5 mol %, based on the polymer, of a second structural unit represented by the formula (II), and having a weight-average molecular weight of from 1.times.10.sup.3 to 5.times.10.sup.6 in polystyrene equivalent: ##STR1## The optical material has a Tg value not less than 120.degree. C., a light transmittance value not less than 85%, and a pencil hardness not lower than H.

REFERENCES:
Otsu et al., Chemical Abstracts, vol. 144, No. 6, abstract 43623, Feb. 11, 1991.
Takateru, Chemical Abstracts, vol. 110, No. 12, Abstract No. 214135, Jun. 12, 1989.

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