Dye enhanced durability through controlled dye environment
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United States of America Patent
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Dec 14, 1999
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N/A
app pub date -
Oct 24, 1997
filing date -
Oct 24, 1997
priority date (Note) -
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Abstract
An interpenetrating polymer network (IPN) or semi-interpenetrating polymer network (semi-IPN) comprises a first phase which is continuous and comprises a flexible polymer and a second phase which is a fluorescent or nonfluorescent durable dispersed or continuous phase and comprises a dye and a polymer, wherein the polymer enhances durability of the dye. Such networks are particularly useful in fluorescent traffic signs or safety devices or in pavement marking tape or paint.
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