Temporary wet strength resin
AssigneeAmerican Cyanamid Company
InventorsGerald J. Guerro, Robert J. Proverb, Robert F. Tarvin
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Abstract
A cationic, water-soluble acrylamide polymer containing an acrylamide, a cationic comonomer and, optionally, a second comonomer and having sufficient glyoxal-reactive amide substituents and --CH.sub.O HCHO substituents to be thermosetting, the polymer, before glyoxylation, having a molecular weight ranging from about 500 to about 6000, a process for imparting temporary wet strength to paper and the paper per se, are disclosed.
Claims6
A glyoxylated cationic, water-soluble acrylamide polymer containing (a) from about 70-99%, by weight, of an acrylamide and (b) from about 1-30%, by weight, of a cationic monomer or mixture of cationic monomers copolymerizable with said acrylamide, up to about 10%, by weight, of said acrylamide being replaced by (c) a different comonomer than (b) copolymerizable with said acrylamide, the amount of said (c) being less than said (b) if said (c) is anionic, said acrylamide copolymer having a molecular weight ranging from about 500 to about 6000 before glyoxylation, and having sufficient glyoxal-reactive amide substituents and --CH.sub.0 HCHO substituents to be thermosetting, the ratio of glyoxol units to acrylamide units ranging from about 0.1-0.5:1.0.
Dependencies are inferred from the claim text.