Sulfide dyes
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Jun 23, 2009
Grant Date -
Feb 26, 2009
app pub date -
Jun 14, 2006
filing date -
Jun 23, 2005
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Abstract
—O—; n is a number from 1 to 5; p, r, s, t and u independently from each other are a 0 or 1; m is 1; or 2; U is hydrogen, if m is 1; and U is the direct bond, if m is 2. The compounds are useful for the dyeing of organic materials, such as keratin fibers, preferably human hair. The dyes are distinguished by deep dying having good fastness properties with respect to washing, light, shampooing and rubbing.
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