C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
C08G 12/12 (2006.01) C08G 12/14 (2006.01) C08G 12/38 (2006.01) C08L 61/24 (2006.01) D21H 17/49 (2006.01) D21H 17/50 (2006.01)
Patent
CA 2049059
O.Z. 0050/40658 Abstract of the Disclosure: Cationic urea-formaldehyde condensates useful as strength enhancers in papermaking are obtainable by (a) reacting urea with at least one alkanolamine in a molar ratio of from 1:1 to 6:1 at from 130 to 180°C with elimination of ammonia, (b) methylola- ting the reaction product of stage (a) with formaldehyde in an aqueous medium at a basic pH, (c) condensing the methylolation product in an aqueous medium at pH 0-6 and terminating the condensation reaction by adjusting the pH to 6.2-8 and optionally diluting the reaction mixture with water.
Eisele Wolfgang
Flory Klaus
Stange Andreas
Basf Aktiengesellschaft
Borden Ladner Gervais Llp
Eisele Wolfgang
Flory Klaus
Stange Andreas
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