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AssigneeMitsui Toatsu Chemicals, Inc.
InventorsToshihiko Takaki, Kenji Tsuboi, Hiroshi Itoh, Atsuhiko Nitta
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This invention provides cationic acrylamide polymers which are highly effective as paper strength agents, drainage agents and suspension flocculants, and which do not show much temporal deterioration; it also provides a method of manufacturing said polymers wherein the manufacturing equipment is compact and can be installed on site, and the cationicity of the polymers can be modified in a short time. This invention comprises a method of manufacturing cationic acrylamide polymers by reaction, with a hypohalogenite, of a (meth)acrylamide homopolymer, a copolymer of (meth)acrylamide and acrylonitrile, a copolymer of (meth)acrylamide and, N,N-dimethylacrylamide, in a high temperature range of 50.degree.-110.degree. C. for a short time; the polymers manufactured by said process; and paper strength agents, drainage agents and flocculants having these polymers as their principal constituent.
Paper prepared using a cationic acrylamide polymer made by a method which comprises reacting an acrylamide polymer and a hypohalogenite under alkaline conditions as a pH of at least 11 for the specified short reaction time, t (sec);
Paper prepared using a cationic acrylamide polymer made by a method which comprises reacting an acrylamide polymer and a hypohalogenite under alkaline conditions at a pH of at least 11 for the specified short reaction time, t(sec);
Paper prepared using a cationic acrylamide polymer made by a method which comprises reacting an acrylamide copolymer and a hypohalogenite under alkaline conditions at a pH of at least about 11 for the specified short reaction time, t(sec);
A method of strengthening paper comprising adding a cationic acrylamide polymer to a paper slurry, said cationic acrylamide polymer being made by a method which comprises reacting an acrylamide polymer and a hypohalogenite under alkaline conditions at a pH of at least 11 for the specified short reaction time, t (sec);
A method of strengthening paper comprising adding a cationic acrylamide polymer to a paper slurry, said cationic acrylamide polymer being made by a method which comprises reacting an acrylamide polymer and a hypohalogenite under alkaline conditions at a pH of at least 11 for the specified short reaction time, t (sec);
A method of strengthening paper comprising adding a cationic acrylamide polymer to a paper slurry, said cationic acrylamide polymer being made by a method which comprises reacting an acrylamide polymer and a hypohalogenite under alkaline conditions at a pH of at least 11 for the specified short reaction time, t (sec);
A method of strengthening paper comprising adding a cationic acrylamide polymer on paper, said cationic acrylamide polymer being made by a method which comprises reacting an acrylamide polymer and a hypohalogenite underalkaline conditions at a pH of at least 11 for the specified short reaction time, t (sec);
A method of strengthening paper comprising adding a cationic acrylamide polymer on paper, said cationic acrylamide polymer being made by a method which comprises reacting an acrylamide polymer and a hypohalogenite underalkaline conditions at a pH of at least 11 for the specified short reaction time, t (sec);
A method of strengthening paper comprising adding a cationic acrylamide polymer on paper, said cationic acrylamide polymer being made by a method which comprises reacting an acrylamide polymer and a hypohalogenite underalkaline conditions at a pH of at least 11 for the specified short reaction time, t (sec);
Dependencies are inferred from the claim text.