Process for the preparation of a composition for the dyeing of human hair
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United States of America Patent
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Jul 3, 2001
Grant Date -
N/A
app pub date -
Dec 3, 1999
filing date -
Jan 19, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A time and energy saving process for the preparation of a stable, aqueous emulsion for the dyeing of human hair comprises a) first heating a water phase containing water-soluble surfactants, salts and optionally other water-soluble additives to 50.degree. and 90.degree. C.; subsequently, b) while maintaining this temperature, adding solid fatty components having a melting point between 20.degree. C. and the temperature actually applied according to a) between 50.degree. and 90.degree. C., stirring at this temperature until the solid fatty components are completely melted in the mixture, and, c) adding the remaining liquid fatty components to the composition thus obtained without any further heating.
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