Process for the preparation of N-haloamide polymers
AssigneeAmerican Cyanamid Company
InventorsRobin W. Dexter, Peter A. Jarovitzky, Yun-Lung Fu
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Abstract
Aqueous solutions of polyacrylamides are acidified and then reacted with halogen gas or hypohalites to provide N-halogenated polymers. The product of the process are good wet strength additives for paper made from aqueous pulps of paper making fibers.
Claims11
A process for the halogenation of a water soluble acrylamide polymer, said process comprising contacting solution of said polymer of a molecular weight of at least about 100,00, with a reagent selected from a halogen gas or a hypohalite at a temperature ranging from about -10.degree. C. to about 80.degree. C., at a pH of below about 6.0, and at a mole ratio of halogen gas or hypohalite to polymer ranging from about 0.1:99.9 to about 50:50, respectively, to thereby form the corresponding water-soluble, N-halogenated polymer.
Dependencies are inferred from the claim text.