公开(公告)号：DE10247086A1

公开(公告)日：2004-04-22

申请号：DE10247086

申请日：2002-10-09

Applicant: BASF AG

Inventor： DANNER THOMAS ,  SCHAEFER MICHAEL ,  BOEHN ROLAND ,  HEIDEMANN WALTER ,  SCHLOEDER KLAUS ,  SCHUERMANN GREGOR

IPC: C09K23/00 ,  B01F5/06 ,  B01F17/00

Abstract: Evaluation of emulsifiers comprises preparing at least two crude emulsions in which the dispersed phase contains different tracers, mixing together equal parts of the emulsions, finely emulsifying the mixture, and determining to proportion of coalesced dispersed-phase droplets by measuring the area occupied by droplets containing at least two tracers as a percentage of the total area occupied by the sample. Independent claims are also included for: (1) use of a continuous high-pressure homogenizer in which the whole emulsion is forced through a perforated diaphragm under constant pressure to perform the emulsification in the above method; (2) use of reactive dyes, direct dyes, vat dyes, sulfur dyes, naphthols, developer dyes, disperse dyes, metal complex dyes, acid dyes, chrome dyes, cationic dyes or pigments, fluorescent dyes or fluorescence-generating donor-acceptor pairs as tracers in the above method; (3) use of emulsifiers selected from oleic acid ethoxylates, fatty alcohol ethoxylates, castor oil ethyoxylates, alkylphenol ethoxylates, C13 Oxo alcohol ethoxylates and sodium fatty alcohol polyglycol ether sulfates in the above method; (4) use of emulsifiers together with coemulsifiers in the above method; (5) use of active ingredients and/or additives in the aqueous phase and/or oil phase of the emulsion in the above method; (6) use of a microscope slide allowing preparation of emulsion films with a defined thickness of 10-50 mum for microscopic determination of the area percent of tracer-containing droplets in the above method.