Process for preparing high strength paper

Details Process for preparing high strength paper Process for preparing high strength paper

C - Chemistry, Metallurgy

09

C

C09C 1/02 (2006.01) C09C 1/30 (2006.01) C09C 1/40 (2006.01) C09C 1/42 (2006.01) C09C 3/06 (2006.01) D21H 17/68 (2006.01) D21H 17/69 (2006.01)

Patent

CA 2667420

The present invention provides a process for the preparation of an aqueous composition comprising polysilicate coated mineral particles, wherein the process comprises subjecting an aqueous composition comprising gelled polysilicate and a mineral to shear of at least 5'000 rpm for at least 30 seconds. The present invention also provides polysilicate coated mineral particles obtainable by this process as well as paper filled with these particles.

La présente invention concerne un procédé de fabrication d'une composition aqueuse comprenant des particules minérales enrobées de polysilicate, le procédé comprenant l'opération consistant à soumettre une composition aqueuse comprenant du polysilicate gélifié et un minéral à un cisaillement d'au moins 5 000 rpm pendant au moins 30 secondes. La présente invention porte également sur des particules minérales enrobées de polysilicate, pouvant être obtenues par ce procédé tout comme du papier chargé par ces particules.

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