Heterogeneous surfactant granules
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United States of America Patent
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Oct 20, 1998
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N/A
app pub date -
Jan 31, 1997
filing date -
May 2, 1994
priority date (Note) -
Expired
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Abstract
Heterogenous surfactant granules consisting of an inner core containing a) alkyl sulfates corresponding to formula (I): R.sup.1 O--SO.sub.3 X (I) in which R.sup.1 is an alkyl radical containing 16 to 18 carbon atoms and X is an alkali metal or alkaline earth metal, ammonium, alkylammonium, alkanolammonium or glucammonium, and b1) alkyl sulfates corresponding to formula (II): R.sup.2 O--SO.sub.3 X (II) in which R.sup.2 is an alkyl radical containing 12 to 14 carbon atoms and X is as defined above, or b2) alkyl ether sulfates corresponding to formula (III): R.sup.3 O(CH.sub.2 CH.sub.2).sub.n SO.sub.3 X (III) in which R.sup.3 is an alkyl radical containing 16 to 18 carbon atoms, n is a number of 1 to 3 and X is as defined above, and a coating over the inner core consisting of alkyl sulfates corresponding to formula (II), with the provisos that the ratio by weight of component a) to component b) in the inner core is 100:0 to 30:70, and the ratio by weight of the inner core to the coating is 99.5:0.5 to 90:10.
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