Fade-resistant fluorescent retroreflective articles
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United States of America Patent
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Issued Date -
Jul 14, 2005
app pub date -
Jan 9, 2004
filing date -
Jan 9, 2004
priority date (Note) -
Abandoned
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Abstract
A fade-resistant fluorescent colorant composition includes a polymer; a fade-susceptible fluorescent colorant, provided the fluorescent colorant is not a perylene imide derivative; and a hindered amine light stabilizer of molecular weight greater than about 1,200 AMU. The hindered amine light stabilizer includes at least one secondary or tertiary hindered amine. A fade-resistant retroreflective article includes the colorant composition and a retroreflective structure, comprising an array of transparent optical elements. Also included are methods for forming the composition and articles.
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