公开(公告)号：BR0113303A

公开(公告)日：2003-12-30

申请号：BR0113303

申请日：2001-08-16

Applicant: BASF AG

Inventor： ISAK HEINZ ,  SENDHOFF NORBERT ,  TZ FRANZ SCH ,  THERRE J RG ,  LLER MICHAEL DR GEM ,  PRANKE DIRK ,  MUNZINGER MANFRED ,  WECK ALEXANDER ,  BURKART KIRSTEN

IPC: A01N25/12 ,  A01N43/88 ,  C07D285/34

Abstract: Described is a process for the preparation of a particulate tetrahydro-3,5-dimethyl-1,3,5-thiadiazine-2-thione product by combining a first aqueous solution comprising methylammonium N-methyldithiocarbamate with a second aqueous solution comprising formaldehyde, followed by separation and drying of the resulting solid, which comprises combining the first and the second aqueous solutions in such a way that the ratio between the concentrations of dithiocarbamate functions and of formaldehyde is essentially constant in the reaction mixture over time during the duration of the reaction.

公开(公告)号：BR0307455A

公开(公告)日：2004-11-09

申请号：BR0307455

申请日：2003-02-26

Applicant: BASF AG

Inventor： MBEL HELMUT G ,  KNEUPER HEINZ-JOSEF ,  BECKER RAINER ,  BERTLEIN GERHARD ,  LLER MICHAEL DR GEM

IPC: A61K8/00 ,  A61K8/49 ,  A61Q17/04 ,  C07D251/70 ,  C07D251/54 ,  A61K7/44

Abstract: Process for the preparation of the tautomeric form I of 2,4,6-trianilino-p-(carbo-2'-ethylhexyl-1'-oxy)-1,3,5-triazine by crystallization from a tautomer mixture in the presence of one or more solvents chosen from the group consisting of aliphatic alcohols having 2 to 8 carbon atoms, aliphatic carboxylic alkyl esters having a total of 3 to 10 carbon atoms, aromatic carboxylic alkyl esters having a total of 8 to 12 carbon atoms, aliphatic carbonic esters having a total of 3 to 9 carbon atoms, carbonitriles having a total of 2 to 8 carbon atoms, dialkyl ketones having a total of 3 to 6 carbon atoms and aliphatic sulfones having a total of 3 to 6 carbon atoms, where the solvent or the solvent mixture may additionally comprise up to 30% by weight of a hydrocarbon. I is used as light protection agent in cosmetic preparations.