Compounds for reducing background color in color change compositions
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United States of America Patent
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Dec 27, 2016
Grant Date -
Sep 18, 2014
app pub date -
Mar 14, 2014
filing date -
Mar 15, 2013
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Abstract
Aspects of the invention include color change compositions having a color former and color developer composition that transitions from a first color state to a second color state upon application of an applied stimulus and an amount of a copolymer sufficient to eliminate background color of the color former and color developer composition during transition from the first color state to the second color state. Methods for preparing and devices employing the color change compositions of the invention are also described.
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