Optical material

Details Optical material Optical material

1994-12-15

1996-07-16

Schofer, Joseph L.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

5263488, 359642, C08F22240, C08F22606, C08F21000, G02B 300

Patent

active

055367984

ABSTRACT:
An optical material, comprising a resin composed of a polymer constituted of a first structural unit composed of at least one of the compounds represented by the formula (I), and of a second structural unit composed of at least one of the compounds 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 : ##STR1## where R.sub.1 denotes an alkyl group having 1 to 18 carbons or a cycloalkyl group having 3 to 8 carbons; ##STR2## where R.sub.2 denotes hydrogen or an alkyl group having 1 to 8 carbons, and R.sub.3 and R.sub.4 denote respectively an alkyl group having 1 to 8 carbons. The optical material is superior in transparency, heat resistance, surface hardness, mechanical strength, and other properties.

REFERENCES:
patent: 2301356 (1942-11-01), Arnold et al.
patent: 3352832 (1967-11-01), Barr et al.
patent: 5146535 (1992-09-01), Anzai et al.
patent: 5208307 (1994-05-01), Doi et al.
Patent Abstracts of Japan, vol. 11, No. 139; "Optical Disc Base"; Tanaka; Dec. 1986.
Patent Abstracts of Japan, vol. 13, No. 529; "Methacrylic Resin for Optical Device"; Kawachi; Aug. 1989.

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