Deinking processes and novel polymers for use in these

Details Deinking processes and novel polymers for use in these Deinking processes and novel polymers for use in these

D - Textiles, Paper

21

C

D21C 5/02 (2006.01) C08F 220/18 (2006.01)

Patent

CA 2180976

Flexographic or other printed paper is deinked by a process which comprises pulping in the presence of an emulsion of crosslinked, insoluble, ionisable and swellable polymer particles. The emulsion preferably provides a viscosity (at 3 %) in the ionised state of below 50,000 cps (Brookfield RVT) and is novel.

On désencre du papier à impression flexographique ou imprimé différemment à l'aide d'un procédé consistant à désintégrer ce papier en présence d'une émulsion de particules d'un polymère réticulé, insoluble, susceptible d'être ionisé et gonflable. De préférence, cette émulsion possède une viscosité (à 3%) à l'état ionisé qui est inférieure à 50000 cps (telle que mesurée par un viscosimètre Brookfield, modèle RVT), et elle est nouvelle.

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