Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Bernd Noecker0
Isabel Vega Carrascal0
Date of Patent
September 4, 2007
Patent Application Number
11470378
Date Filed
September 6, 2006
Patent Primary Examiner
Patent abstract
This invention relates to a hair dyeing composition showing excellent dyeing ability comprising at least one direct acting hair dye and benzylurea and/or benzyl carbamate and/or N-(2-methoxybenzyl)urea. The direct acting hair dyes are preferably selected from anionic, acidic dyestuffs. In addition to benzylurea and/or benzyl carbamate and/or N-(2-methoxybenzyl)urea compositions further comprise organic solvents as penetration enhancers. Compositions according to the invention has a pH in the range from 1 to 5 and preferably comprises polymeric thickening agents, organic and/or inorganic acids and conditioning agents.
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