Multiple Component Materials Having A Color-Changing Composition
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United States of America Patent
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Issued Date -
Jan 20, 2011
app pub date -
Jul 15, 2009
filing date -
Jul 15, 2009
priority date (Note) -
Abandoned
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Abstract
The present invention relates to a multiple-component material including a substrate and a film layer on the substrate. The film layer includes a color-changing composition to indicate a change in condition, such as a change in pH. The color-changing composition includes a water-insoluble, film-forming polymer, a pH adjuster and a water-insoluble particle. The water-insoluble particle has a charged colorant immobilized on it.
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