Alumina dispersions

Details Alumina dispersions Alumina dispersions

B - Operations, Transporting

01

F

134/51

B01F 3/12 (2006.01) C09D 17/00 (2006.01)

Patent

CA 1062985

ABSTRACT OF THE DISCLOSURE Stable aqueous dispersions of alumina are formed at concentrations of A1203 of between 18% to 26% on a weight basis by dispersing alumina in a hydrochloric acid solution which is controlled at a temperature below the boiling point of the dispersion, where the A1203/HC1 parts by weight ratio is maintained between 53 and 66 pbw of A1203/1 pbw of HC1, in which the A1203 is provided at 18 to 26% of the total mixture and in which the pH is maintained at 3.5 to 4.2, and simultaneously agitating the mixture to obtain the desired dispersion. Such aqueous dispersions are stable for periods in excess of 6 months and can be used to increase the non-slip characteristics of paper to which it is applied.

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