Basf Aktiengesellschaft

Basf Se Corporation

Construction Research & Technology Gmbh

Hans-Peter Kaub

Marc Rudolf Jung

Simon Nord

Hans-Peter Hentze

Sven Holger Behrens

Simon Champ

Ulrike Geissler

Anton Esser

Frank Runge

Torsten Freund

Ralph Lunkwitz

Tina Schröder-Grimonpont

Dirk Schmitt

Tina Schröder-grimonpont

Jürgen Neumann

Aqueous dispersions of polymers which obtained by free radical suspension polymerization or free radical miniemulsion polymerization of ethylenically unsaturated monomers in an oil-in-water emulsion whose disperse phase comprises at least one fluorescent dye dissolved in at least one ethylenically unsaturated monomer and has an average particle diameter of at least 1 &#x3bc;m, in the presence of at least one surface-active compound and at least 0.5% by weight, based on the monomers, of at least one hydrophobic, nonpolymerizable, organic compound, of a hydrophobic polymer of at least one C2- to C&#x2dc;-olefin having a molar mass Mw of up to 10000, of a siloxane having a molar mass Mw of up to 5000 and/or polystyrene having a molar mass Mw of up to 10000, and of the powders obtainable from these polymer dispersions in each case by drying and comprising at least one fluorescent dye for marking of materials.

Aqueous dispersions of polymers which comprise a fluorescent dye, process for their production and their use for marking materials

Aqueous dispersions of polymers which obtained by free radical suspension polymerization or free radical miniemulsion polymerization of ethylenically unsaturated monomers in an oil-in-water emulsion whose disperse phase comprises at least one fluorescent dye dissolved in at least one ethylenically unsaturated monomer and has an average particle diameter of at least 1&#x3bc;m, in the presence of at least one surface-active compound and at least 0.5% by weight, based on the monomers, of at least one hydrophobic, nonpolymerizable, organic compound, of a hydrophobic polymer of at least one C- to C-olefin having a molar mass Mof up to 10000, of a siloxane having a molar mass Mof up to 5000 and/or polystyrene having a molar mass Mof up to 10000, and of the powders obtainable from these polymer dispersions in each case by drying and comprising at least one fluorescent dye for marking of materials.

Identification and quantification of mass-produced goods in articles, a dye-containing polymer dispersion having been added to the mass-produced goods. The polymer dispersions contain particles which are coded by a mixture of dyes, and the polymer dispersion particles are quantitatively determined.

Method for qualitatively and quantitatively identifying bulk goods

A method and apparatus for determining the size distribution of at least two different types of fluorescent or fluorescently stained particles in a sample by radiating light into a stream of singled particles and recording and analyzing both the scattered light and the fluorescent light. A relative particle size distribution for each individual particle type (T.sub.k) is calculated and then the relative particle size distribution for the individual particle types is normalized forming a joint relative particle size distribution of the at least two particle types with respect to one another.

Method and apparatus for determining the size distribution of different

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Altrip, Germany

Hans-Peter Kaub