Highly refractive urethane polymers for use in optical lenses and lenses prepared therefrom.

摘要

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:
<Chemistry id="chema01" num="0001"><Image id="ia01" he="20" wi="42" file="IMGA0001.TIF" imgContent="chem" imgFormat="TIFF" inline="no" /></Chemistry>where:
<UnorderedLists id="ula01" listStyle="none"><ListItem>R, is either H or CH<Sub>3</Sub></ListItem><ListItem>R<Sub>2</Sub> is a radical of a substituted or unsubstituted hydrocarbon having 2-4 carbon atoms;
<Chemistry id="chema02" num="0002"><Image id="ia02" he="22" wi="49" file="IMGA0002.TIF" imgContent="chem" imgFormat="TIFF" inline="no" /></Chemistry>where:</ListItem><ListItem>R<Sub>3</Sub> is either H or CH<Sub>3</Sub></ListItem><ListItem>m = 2-5;</ListItem><ListItem>3. CH<Sub>2</Sub>=CH-CH<Sub>2</Sub>-OH; and</ListItem><ListItem>4. (CH<Sub>2</Sub>=CH-CH<Sub>2</Sub>-O-CH<Sub>2</Sub>)<Sub>2</Sub> CHOH</ListItem></UnorderedLists>