C - Chemistry – Metallurgy – 09 – D
Patent
C - Chemistry, Metallurgy
09
D
C09D 17/00 (2006.01) B41M 5/00 (2006.01) D21H 19/40 (2006.01)
Patent
CA 2586202
The invention relates to a pigment composition in the form of an aqueous dispersion or slurry comprising: (a) porous aggregates formed by aggregation of colloidal primary particles of silica, aluminosilicate or a mixture thereof in an aqueous sol, said porous aggregates having a mean diameter from about 0.03 to about 25 ~m, and, (b) extender particles where the mean size of at least one dimension is larger than the mean diameter of the porous aggregates, wherein the weight ratio of porous aggregates to extender particles is from about 0.01:1 to about 3:1. The invention further relates to a process for its production, a compositionfor coating paper or paper board and a process for its production, and a process for coating paper or paper board and paper or paper board obtainable by the process.
L'invention concerne une composition de pigment sous forme de dispersion ou suspension aqueuse qui comprend: (a) des agrégats poreux de particules colloïdales primaires de silice, d'aluminosilicate, ou de mélange des deux, en solution aqueuse, ces agrégats ayant un diamètre moyen compris entre environ 0,03 et environ 25 ?m, et, (b) des particules d'extension sachant que la taille moyenne d'au moins une dimension de ces particules est supérieure au diamètre moyen susmentionné, et que le rapport de poids agrégats/particules d'extension est compris entre environ 0,01:1 et environ 3:1. On décrit aussi un procédé pour la production de cette composition, une composition pour le revêtement de papier ou de carton, et un procédé de production correspondant, un procédé pour le revêtement de papier ou de carton, et enfin du papier ou du carton ainsi revêtu.
Andersson Kjell Rune
Carlen Joakim
Lindgren Erik
Akzo Nobel N.v.
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
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