Back to results
US 6,669,815 B1Granted
Sheet surface treating agent and ink-jet printing paper
AssigneeHymo Corporation
InventorsToshiaki Sugiyama, Motosuke Ono, Osamu Kamada
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeHymo Corporation
InventorsToshiaki Sugiyama, Motosuke Ono, Osamu Kamada
Estimating the term…
There is provided a treating agent for a sheet surface comprising a graft copolymer composed of a back bone polymer and branch polymer, either of which is a polymer having vinyl alcohol units, and the other of which is a polymer having cationic groups, the treating agent is applied onto a pulp sheet or plastic sheet, and the coated sheet is used in ink jet printing. Cationic groups are introduced by graft copolymerization using di(meth)allylamine-based and/or (meth)acryl-based monomer. Alternatively, the graft copolymer of the present invention is obtained by grafting N-vinylcarboxylic acid amide monomer followed by hydrolysis thereof. A formula weight ratio of vinylalcohol units and the introduced cationic groups of 1:20 to 2:1 is preferable in terms of balanced performance.
A treating agent for a sheet surface, comprising a copolymer comprising a polymer moiety having vinyl alcohol units and a polymer moiety having cationic group, said copolymer being a graft copolymer in which said respective polymer moieties are a back bone polymer and a branch polymer, either of which has the vinyl alcohol units, and the other of which has the cationic groups, wherein said back bone polymer of said graft copolymer is derived from a water-dispersible polymer having vinyl alcohol units, and said branch polymer is composed of at least one repeating unit selected from the group consisting of a repeating unit represented by the following formula (1):
Dependencies are inferred from the claim text.