C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
400/6514
C08L 33/20 (2006.01) C08F 2/28 (2006.01) C08F 220/06 (2006.01) C08F 220/42 (2006.01) C08F 257/02 (2006.01) D21H 17/35 (2006.01) D21H 17/37 (2006.01) D21H 17/43 (2006.01) D21H 17/45 (2006.01) D21H 21/16 (2006.01)
Patent
CA 1182943
A CATIONIC SIZING AGENT FOR PAPER AND A PROCESS FOR THE PREPARATION THEREOF Abstract of the Disclosure Cationic sizing agents for paper in the form of an aqueous colloid-disperse solution having average particle diameters of from 15 to 200 nm are obtained by dissolving a water-soluble cationic, chemically uniformly composed terpolymer compound of: a) from 7 to 40 % by weight of N,N-dimethylaminoethyl acrylate and/or methacrylate, b) from 45 to 80 % by weight of styrene, and c) from 4 to 40 % by weight of acrylonitrile in an aqueous medium., the total of components a) to c) always amounting to 100 % by weight and at least 10 % of the N,N-dimethylamino groups of the terpolymer being quaternised and the rest being protonated, and by emulsifying, in the presence of from 10 to 70 % by weight, based on the following monomer mixture, of this emulsifier, d) acrylonitrile or methacrylonitrile in quantities of from 5 to 95 % by weight, with e) C1-C12-alkyl esters of acrylic acid and/or of methacrylic acid in quantities of from 5 to 95 % by weight, the total of components d) and e) amounting to 100 % by weight, and by subjecting the emulsion thus obtained to a radically initiated emulsion polymerisation process at temperatures of from 20 to 150°C.
395453
Baumgen Heinz
Kolb Gunter
Mummenhoff Peter
Probst Joachim
Aktiengesellschaft Bayer
Fetherstonhaugh & Co.
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