C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
C08F 226/02 (2006.01) C08G 73/02 (2006.01) D21H 17/34 (2006.01) D21H 17/55 (2006.01)
Patent
CA 2049383
ABSTRACT The present invention is a process for preparing a polyaminopolymer which contains functionality comprising the steps of (a) contacting a polyfunctional amine with an unsaturated alkylating agent under reaction conditions to form an amine/unsaturated alkylating agent adduct; (b) contacting the adduct with a polyfunctional compound such that a polyaminopolymer is formed; (c) contacting the polyaminopolymer with a halogen, hypohalous acid or precursor thereof such that a polyaminopolymer having halohydrin or dihalo functionality is formed; and (d) raising the pH of the polyaminopolymer having halohydrin or vicinal dihalo functionality sufficiently to cause an increase in molecular weight. Alternatively, the invention is a process having steps (a), (b), (c) and optionally (d), but with a step (h) between steps (b) and (c) of contacting the polyaminopolymer with a crosslinking agent therefor having at least two functional groups reactive with amine groups such that a crosslinked polyaminopolymer is formed. The invention includes polyaminopolymers so prepared, papers prepared using such polymers, and processes for preparing such papers. The papers so prepared preferably have improved wet strength. 36,768-F
Buckner Wanda G.
Glass Terry W.
Weaver Otha G,. Jr.
Smart & Biggar
The Dow Chemical Company
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