Photochromic Compositions and Articles Comprising Polyether Oligomer
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United States of America Patent
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Issued Date -
Oct 25, 2007
app pub date -
Apr 29, 2005
filing date -
Apr 30, 2004
priority date (Note) -
Abandoned
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Abstract
This invention relates to a polymerizable composition for forming a photochromic article having a glass transition temperature of at least 50.degree. C. on curing the composition comprising: (a) a polymerizable composition comprising a monomer component; and (c) a photochromic dye monomer comprising a photochromic moiety and at least one oligomer group having at least one group reactive with the monomer component during curing wherein the oligomer group comprises at least seven polyether monomer units selected from alkylenoxy and haloalkylenoxy.
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