C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
400/9321
C08L 61/20 (2006.01) C08F 8/28 (2006.01) C08F 8/32 (2006.01) C08F 8/44 (2006.01)
Patent
CA 1102029
ABSTRACT OF THE DISCLOSURE An improved process for rapidly preparing amino methylated derivatives of dilute aqueous solutions of acrylamide polymers which comprises the steps: A. Preparing a 2.8 - 6% aqueous solution of an acrylamide polymer which has a molecular weight of at least 500,000; B. Adding to the solution formed in A approximately 1 mole of formaldehyde and approximately 1 mole of a dialkyl amine which contains from 2 - 4 carbon atoms based on the amide content of the acrylamide polymer under conditions of good agitation; C. Reacting the acrylamide polymer with the formaldehyde and the dialkyl amine at a temperature between 80 - 100°C. for a period of time ranging between 2 - 15 minutes to form an amino methylated acrylamide polymer. C1 - C4 alkyl quaternary ammonium salt derivatives of these amino methylated acrylamide polymers may be prepared by adjusting the pH to 8.4 - 8.7 and reacting them with a lower alkyl quaternizing agent at a temperature ranging between 50° - 80°C. for a period of time ranging between 2 - 5 minutes. -2-
315826
Ballweber Edward G.
Hurlock John R.
Phillips Kenneth G.
Nalco Chemical Company
Smart & Biggar
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