Pre-emulsion and use thereof for the preparation of a hair dyeing composition as well as process for the preparation of a hair dyeing emulsion
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United States of America Patent
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Aug 21, 2001
Grant Date -
N/A
app pub date -
Feb 7, 2000
filing date -
Feb 11, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention concerns a pre-emulsion for the simple preparation of a hair dyeing composition, comprising a combination of a) 20% to 40% by weight of at least one C.sub.12 -C.sub.14 -fatty alcohol ethoxylate with 1 to 5 ethylene oxide groups; b) 15% to 40% by weight of oleic acid; c) 10% to 30% by weight of ethanediol and/or 1.2-propanediol distearate; d) 5% to 20% by weight of glyceryl stearate and/or at least one sugar fatty acid ester; and, e) 0% to 25% by weight of at least one C.sub.12 -C.sub.18 -fatty alcohol, each calculated to the total pre-emulsion composition; containing no further emulsifiers or fatty substances, having a maximum water content of 10% by weight, in particular 5% by weight, whereby the pH-value is preferably between 7.1 and 9. This pre-emulsion can be mixed at a low temperature with a customary aqueous composition, comprising at least one oxidation dyestuff precursor, to give a stable hair dyeing emulsion.
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