The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 11, 2006
Filed:
Feb. 26, 2003
Helmut Gümbel, Dannenfels, DE;
Heinz-josef Kneuper, Niederkirchen, DE;
Rainer Becker, Bad Dürkheim, DE;
Gerhard Bertlein, Neckargemünd, DE;
Michael Drögemüller, Mannheim, DE;
Helmut Gümbel, Dannenfels, DE;
Heinz-Josef Kneuper, Niederkirchen, DE;
Rainer Becker, Bad Dürkheim, DE;
Gerhard Bertlein, Neckargemünd, DE;
Michael Drögemüller, Mannheim, DE;
BASF Aktiengesellschaft, Ludwigshafen, DE;
Abstract
The invention relates to a method for producing the tautomeric form (I) of 2,4,6-trianilino-p-(carbo-2'-ethylhexyl-1′-oxy)-1,3,5-triazine by the crystallization of a tautoner mixture in the presence of one or more solvents selected from the group consisting of aliphatic alcohol having 2 8 C-atoms made of aliphatic alcohol, aliphatic carboxylic acid alkyl esters having a total of between 3–10 C-atoms, aromatic carboxylic acid alkyl esters having a total of between 8–12 C-atoms, aliphatic carboxylic acid esters having a total of between 3 9 C-atoms, carboxylic acid nitriles having a total of between 2–8 C-atoms, dialkylketones having a total of between 3–6 C-atoms and aliphatic sulphones having a total of between 3–6 C-atoms. The solvent or solvent mixture can additionally contain up to 30 wt % of a hydrocarbon (I) acts as a light protecting agent in cosmetic preparations.