NOVEL CATIONIC THICKENERS USABLE OVER A WIDE PH RANGE, METHOD FOR THE PREPARATION THEREOF, AND COMPOSITION CONTAINING SAME
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United States of America Patent
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Issued Date -
Aug 15, 2013
app pub date -
Nov 28, 2011
filing date -
Dec 2, 2010
priority date (Note) -
Abandoned
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Abstract
Positive latex including an oil phase, an aqueous phase, at least one water-in-oil emulsifying system, and a linear, branched or cross-linked cationic polyelectrolyte resulting from the polymerization, for 100 mol %, of: a) a molar ratio >40% and ≦99% of monomer units originating from at least one cationic monomer; b) a molar ratio ≧1% and <60% of monomer units originating from N-(2-hydroxyethyl)acrylamide; c) optionally, a molar ratio >0% and <30% of monomer units originating from at least one neutral monomer other than the N-(2-hydroxyethyl)acrylamide, on the condition that the molar ratio is strictly less than that of the monomer units originating from N-(2-hydroxyethyl)acrylamide; and d) optionally, a molar ratio >0% and ≦1% of a diethylene or polyethylene cross-linking monomer. A method for preparing and using the positive latex as a thickener for cosmetic or pharmaceutical compositions is also described.
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