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Assignee3V Sigma S.p.A.
InventorsFrancesco Maestri, Luca Bemporad, Ferruccio Berte'
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Disclosed is the compound of formula known by the name of diethylhexyl butamido triazone, characterised by a low content of impurities deriving from the preparation process, and by low APHA colour values. The compound according to the invention is obtained by reacting cyanuryl chloride with one equivalent of para-aminobenzoic acid, reacting the intermediate obtained with two equivalents of 2-ethylhexyl-4-aminobenzoate, activating the carboxy group, for example by formation of acyl chloride, and final reaction with tert-butylamine. The compound according to the invention is a UV-B filter which can be advantageously used in cosmetic formulations.
Diethylhexyl butamido triazone characterised by a 2-ethylhexyl-4-aminobenzoate content lower than 1000 ppm and by an APHA colour ranging from 0 to 400.
Diethylhexyl butamido triazone with a 2-ethylhexyl-4-aminobenzoate content ranging from 1 to 1000 ppm.
Diethylhexyl butamido triazone with a 2-ethylhexyl-4-aminobenzoate content ranging from 1 to 700 ppm.
Diethylhexyl butamido triazone with an APHA colour (10% sol. in toluene) ranging from 0 to 250.
Dependencies are inferred from the claim text.