Polymeric hair dyes
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United States of America Patent
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Dec 25, 2012
Grant Date -
May 10, 2012
app pub date -
Jul 15, 2010
filing date -
Jul 15, 2009
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Abstract
Disclosed are polymeric dyes of formula (1a), (1b), or (1c); wherein the substituents and variables are defined in the claims and specification. The dyes are distinguished by their depth of shade and their good fastness properties to washing, such as, for example, fastness to light, shampooing and rubbing.
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