Highly refractive urethane polymers for use in optical lenses and lenses prepared therefrom
AssigneeToray Industries, Inc.
InventorsTadanori Fukuda, Tadayo Matsunaga
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Abstract
Highly refractive urethane polymers for use in optical lenses and the lenses produced therefrom are obtained by polymerizing at least one unsaturated urethane compound which is the reaction product of at least one xylylene diisocyanate and at least one compound selected from the group comprising: ##STR1## where: R.sub.1 is either H or CH.sub.3 R.sub.2 is a remnant radical of a substituent or non-substituent hydrocarbon having 2-4 carbon atoms; ##STR2## where: R.sub.3 is either H or CH.sub.3 m=2-5; CH.sub.2 =CH--CH.sub.2 --OH; and 3 (CH.sub.2 =CH--CH.sub.2 --O--CH.sub.2).sub.2 CHOH. 4
Claims7
A lens having a refractive index n.sub.D.sup.20 of more than 1.55 comprising a highly refractive, highly uniformly refractive, hard, thermosetting polymerization product of at least one unsaturated urethane compound, said unsaturated urethane compound being a reaction product of at least one xylylene diisocyanate with at least one compound selected from the group consisting of:
- ##STR7## where:
- R.sub.1 is either H or CH.sub.3 ;
- and
- R.sub.2 is a remnant radical of a substituent or non-substituent hydrocarbon having 2-4 carbon atoms;
- ##STR8## where:
- R.sub.3 is either H or CH.sub.3 ;
- and
- m=2-5;
- CH.sub.2 .dbd.CH--CH.sub.2 --OH;
- (c)
- and
- (CH.sub.2 .dbd.CH--CH.sub.2 --O--CH.sub.2).sub.2 --CHOH (d).
Dependencies are inferred from the claim text.