Method for producing aqueous polymer dispersions containing...

C - Chemistry – Metallurgy – 08 – F

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C08F 2/44 (2006.01) C08F 2/22 (2006.01) C09B 3/14 (2006.01) C09B 69/10 (2006.01) C09D 5/02 (2006.01) C09D 11/00 (2006.01) D21H 19/36 (2006.01)

Patent

CA 2320244

The invention relates to a method for producing aqueous polymer dispersions containing colorants by radical aqueous emulsion polymerisation of ethylenically unsaturated monomers in the presence of radical-forming initiators. At least a proportion of the monomers is used in the form of an oil-in-water emulsion E1 whose disperse phase contains at least one. oil-soluble colorant. The inventive method is characterised in that the disperse phase of E1 is essentially made up of colorant-containing monomer droplets with a diameter < 500 nm. The invention also relates to perylene colorants of general formula (III) in accordance with claim 35, and to colorant-containing preparations which contain the inventive colorant-containing polymers and pigment- containing preparations which contain an inventive polymer with an optical brightener.

L'invention concerne un procédé pour produire des dispersions aqueuses de polymères, contenant des colorants, par polymérisation en émulsion aqueuse radicalaire de monomères éthyléniquement insaturés en présence d'initiateurs formant des radicaux. Selon ce procédé, on utilise au moins une partie des monomères sous forme d'une émulsion huile dans l'eau E1, dont la phase dispersée contient au moins un colorant soluble dans l'huile. Ce procédé est caractérisé en ce que la phase dispersée de E1 est formée essentiellement de gouttelettes de monomères renfermant des colorants, présentant un diamètre < 500 nm. L'invention concerne en outre des colorants au pérylène de formule générale (III) selon la revendication 35. L'invention concerne également des préparations renfermant des colorants, qui contiennent des polymères renfermant des colorants, selon l'invention, ainsi que des préparations renfermant des pigments, qui contiennent des polymères selon l'invention, comportant des azurants optiques.

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