Precipitated calcium carbonate pigment, especially for use...

Details Precipitated calcium carbonate pigment, especially for use... Precipitated calcium carbonate pigment, especially for use...

C - Chemistry, Metallurgy

09

C

C09C 3/06 (2006.01) B41M 5/52 (2006.01) C09C 1/02 (2006.01) C09D 11/02 (2006.01)

Patent

CA 2599680

The invention relates to novel and innovative PCC pigments, able to be used in a paper coating formulations to manufacture coated "multipurpose" papers, in particular for inkjet applications, whose print qualities would be identical or quite similar to high resolution commercial papers, while maintaining a reduced paper manufacturing and production cost. Said pigments are obtained by a carbonation process using a reduced flow rate of CO2/air, which leads to porous agglomerates of PCC of a very specific structure and unique properties, followed by an upconcentration step leading to substantially the same agglomerates but with a higher, appropriate, solids content.

L'invention concerne des pigments de CCP nouveaux et innovants, pouvant être utilisés dans des préparations de couchage de papier afin de fabriquer des papiers "polyvalents" couchés, notamment pour des applications à jet d'encre, dont les qualités d'impression sont identiques ou assez similaires à des papiers commerciaux haute résolution, tout en maintenant un coût de fabrication et de production de papier réduit. Lesdits pigments sont obtenus par un procédé de carbonisation utilisant un débit réduit de CO2/air, ce qui donne des agglomérats poreux de CCP présentant une structure très spécifique et des propriétés uniques, suivi d'une étape de surconcentration donnant sensiblement les mêmes agglomérats mais présentant une teneur en solides plus élevée, appropriée.

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