D - Textiles – Paper – 21 – H
Patent
D - Textiles, Paper
21
H
9/47, 9/66
D21H 17/21 (2006.01) C01F 7/02 (2006.01) C01F 7/14 (2006.01) C09J 193/00 (2006.01) D21C 5/02 (2006.01) D21H 17/09 (2006.01) D21H 17/62 (2006.01) D21H 17/67 (2006.01) D21H 17/70 (2006.01) D21H 23/04 (2006.01)
Patent
CA 2016262
Abstract In order to avoid the decomposition of the calcium carbonate by the solutions of acid-reacting aluminum salts used for the precipitation and fixing of the resin size in the sizing of calcium carbonate-con- taining papers with resin size dispersions, the procedure is as follows: An aqueous colloidal solution of homogeneous aluminum hydroxide is prepared which contains 0.1 to 50 g/liter of aluminum hydroxide and has a pH of 6 to 8. This colloidal solution is mixed with the paper pulp or the resin size dispersion under turbulent flow conditions during or immediately after its formation. To prepare the colloidal solution, an aqueous solution which contains 1 to 40 g/liter of an acid- reacting aluminum salt can either be mixed under tur- bulent flow conditions in a stoichiometric ratio with an aqueous solution which contains 1 to 50 g/liter of at least one alkaline-reacting substance, or it can be passed over an anion exchanger in the OH form. E
Fetherstonhaugh & Co.
Mori Peter W.
Van Baerle & Cie Ag
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