Cationic clays and uses in paper and paints

Details Cationic clays and uses in paper and paints Cationic clays and uses in paper and paints

C - Chemistry, Metallurgy

09

C

6/212, 252/33, 9

C09C 1/42 (2006.01) B01J 20/22 (2006.01) C09D 7/12 (2006.01) D21H 17/68 (2006.01) D21H 21/02 (2006.01)

Patent

CA 1330980

CATIONIC CLAYS AND USES IN PAPER AND PAINTS ABSTRACT Cationic kaolin clay which is useful as a filler and coating agent in paper and in paints, and as a pitch control agent in paper making processes, is produced by treating kaolin clay with 0.5 to 1.5 wt. % of aluminum chlorohydrate. The cationic clay, when added to an aqueous system containing paper fibers, is attracted to the anionic paper fibers causing co- flocculation of pigment and paper fines so as to increase pigment and paper fines retention and, additionally, optical and mechanical properties of the paper. When added to paint, the optical properties and hiding power are improved. When added to a paper furnish containing pitch, the pitch fines are absorbed.

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