C - Chemistry – Metallurgy – 01 – F
Patent
C - Chemistry, Metallurgy
01
F
C01F 11/18 (2006.01) C08K 3/26 (2006.01) D21H 17/67 (2006.01) D21H 19/38 (2006.01)
Patent
CA 2527535
A process for the preparation of platy PCC comprising the steps of providing a suspension of calcium hydroxide, carbonating the suspension of calcium hydroxide, adding a condensed phosphate to the suspension prior to the completion of carbonation to precipitate platy calcium carbonate. A paper that is filled is also provided and a paper that is coated and a polymer that is filled are envisioned that use the platy PCC according to the present invention.
La présente invention concerne un procédé de préparation de carbonate de calcium précipité lamellaire qui consiste à former une suspension d'hydroxyde de calcium, à carbonater la suspension d'hydroxyde de calcium, et à ajouter un phosphate condensé à la suspension avant que la carbonation soit achevée afin de précipiter le carbonate de calcium lamellaire. L'invention se rapporte également à un papier chargé, et à un papier couché et à un polymère chargé que l'on obtient à partir du carbonate de calcium précipité lamellaire de l'invention.
Marks & Clerk
Specialty Minerals (michigan) Inc.
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