Optical material
AssigneeTosoh Corporation
InventorsToru Doi, Tomohiro Ishikawa
Life of this patent
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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.
Claims5
An optical lens comprising a resin composed of a polymer containing 20 to 90 mol %, based on the polymer, of a first structural unit represented by the formula (I) and 80 to 10 mol %, based on the polymer, of a second structural unit represented by the formula (2), and having a weight-average molecular weight of from 1.times.10.sup.4 to 1.times.10.sup.5 in polystyrene equivalent, a light transmittance value not less than 85%, a T.sub.g value not less than 120.degree. C. and a pencil hardness not lower than B:
- ##STR3## where R.sup.1 is a cyclic alkyl group represented by C.sub.m H.sub.2m-1 or a linear or branched alkyl group represented by C.sub.n H.sub.2n+1 ;
- m is an integer of 3 to 8;
- and n is an integer of 1 to 18;
- --CH.sub.2 --CHR.sup.2 -- (II)
- where R.sup.2 denotes hydrogen or an alkyl group having 1 to 8 carbons.
An optical fiber comprising a resin composed of a polymer containing 20 to 90 mol %, based on the polymer, of a first structural unit represented by the formula (1) and 80 to 10 mol %, based on the polymer, of a second structural unit represented by the formula (2), and having a weight-average molecular weight of from 1.times.10.sup.4 to 1.times.10.sup.5 in polystyrene equivalent, a light transmittance value not less than 85%, a Tg value not less tan 120.degree. C. and a pencil hardness not lower than B:
- ##STR4## where R.sup.1 is a cyclic alkyl group represented by C.sub.m H.sub.2m-1 or a linear or branched alkyl group represented by C.sub.n H.sub.2n+1 ;
- m is an integer of 3 to 8;and n is an integer of 1 to 199
- where R.sup.3 denotes hydrogen or an alkyl group having 1 to 89 carbons.
An optical disc substrate comprising a resin composed of a polymer containing 20 to 90 mol %, based on the polymer, of a first structural unit represented by the formula (1) and 80 to 10 mol %, based on the polymer, of a second structural unit represented by the formula (2), and having a weight-average molecular weight of from 1.times.10.sup.4 to 1.times.10.sup.5 in polystyrene equivalent, a light transmittance value not less than 85%, a Tg value not less than 120.degree. C. and a pencil hardness not lower than B:
- ##STR5## where R.sup.1 is a cyclic alkyl group represented by C.sub.m H.sub.2m-1 or a integer of 3 to 8;
- and n is an integer of 1 to 18;
- --CH.sub.2 --CHR.sup.3 -- (II)
- where R.sup.2 denotes hydrogen or an alkyl group having 1 to 8 carbons.
An automobile lens comprising a resin composed of a polymer containing 20 to 90 mol %, based on the polymer, of a first structural unit represented by the formula (1) and 80 to 10 mol %, based on the polymer, of a second structural unit represented by the formula (2), and having a weight-average molecular weight of from 1.times.10.sup.4 to 1.times.10.sup.5 in polystyrene equivalent, a light transmittance value not less than 85%, a Tg value not less than 120.degree. C. and a pencil hardness not lower than B:
- ##STR6## where R.sup.1 is a cyclic alkyl group represented by C.sub.m H.sub.2m-1 or a linear or branched alkyl group represented by C.sub.n H.sub.2n+1 ;
- m is an integer of 3 to 8;
- and n is an integer of 1 to 18;
- --CH.sub.2 --CHR.sup.2 -- (II)
- where R.sup.2 denotes hydrogen or an alkyl group having 1 to 8 carbons.
A lighting fixture comprising a resin composed of a polymer containing 20 to 90 mol %, based on the polymer, of a first structural unit represented by the formula (1) and 80 to 10 mol %, based on the polymer, of a second structural unit represented by the formula (2), and having a weight-average molecular weight of from 1.times.10.sup.4 to 1.times.10.sup.5 in polystyrene equivalent, a light transmittance value not less than 85%, a Tg value not less than 120.degree. C. and a pencil hardness not lower than B:
- ##STR7## where R.sup.1 is a cyclic alkyl group represented by C.sub.m H.sub.2m-1 or a linear or branched alkyl group represented by C.sub.n H.sub.2n+1 ;
- m is an integer of 3 to 8;
- and n is an integer of 1 to 18;
- --CH.sub.2 --CHR.sup.2 --TM(II)
- where R.sup.2 denotes hydrogen or an alkyl group having 1 to 8 carbons.
Dependencies are inferred from the claim text.