# US 8,465,622 B2 · Paper substrate containing a wetting agent and having improved print mottle > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,465,622 B2 - Document ID: US8465622B2 - Status: Granted - Kind: B2 - Application number: 13/288,465 - Filed: 2011-11-03 - Published: 2012-06-07 - Granted: 2013-06-18 - Earliest claimed: 2007-12-26 - Assignees: International Paper Company - Applicants: Yan C. Huang; Kapil M. Singh; David B. Shelmidine; Jeff R. Becker; Paul J. Fosco - Inventors: Yan C. Huang; Kapil M. Singh; David B. Shelmidine; Jeff R. Becker; Paul J. Fosco - Web page: https://patentgrep.com/patent/US8465622B2 ## CPC - C09D 103/02: Starch; Degradation products thereof, e.g. dextrin - B41M 5/52: Macromolecular coatings - D21H 17/20: Macromolecular organic compounds - D21H 17/33: Synthetic macromolecular compounds - D21H 17/45: Nitrogen-containing groups - D21H 17/66: Salts, e.g. alums - D21H 17/67: Water-insoluble compounds, e.g. fillers, pigments - D21H 21/16: Sizing or water-repelling agents - C09D: COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR (cosmetics A61K; processes for applying liquids or other fluent materials to surfaces, in general, B05D; staining wood B27K5/02; glazes or vitreous enamels C03C; natural resins, French polish, drying-oils, driers, turpentine, per se, C09F; polishing compositions other than French polish, ski waxes C09G; adhesives or use of materials as adhesives C09J; materials for sealing or packing joints or covers C09K3/10; materials for stopping leaks C09K3/12; processes for the electrolytic or electrophoretic production of coatings C25D) - B41M: PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING, (correction of typographical errors B41J; processes for applying transfer pictures or the like B44C1/16; fluid media for correction of typographical errors by coating C09D10/00; printing textiles D06P) - D21H: PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR ## Abstract The present invention relates to a sizing composition that, when applied to paper substrate, creates a substrate, preferably suitable for inkjet printing, having increased print density, enhanced print mottle, as well as print sharpness, low HST, and/or image dry time, the substrate preferably having high brightness and reduced color-to-color bleed as well. In addition, the present invention relates to a method of reducing the HST of a paper substrate by applying the sizing composition to at least one surface thereof. Further, the application relates to methods of making and using the sizing composition, as well as methods of making and using the paper containing the sizing composition. ## Claims ### Claim 1 A sizing composition, comprising at least one pigment at least one binder; at least one cationic nitrogen containing organic species having one or more quaternary ammonium functional groups and selected from the group consisting of: polymers and copolymers of diallyldimethyl ammonium chloride (DADMAC); copolymers of vinyl pyrrolidone (VP) with quaternized diethylaminoethylmethacrylate (DEAMEMA); and poly[oxyethylene(dimethyliminio)ethylene(dimethyliminio)ethylene]dichlorides; at least one inorganic salt; and at least one wetting agent. ### Claim 2 (depends on 1) The sizing composition according to claim 1, comprising at least one pigment at least two binders; at least one cationic nitrogen containing organic species having one or more quaternary ammonium functional groups; at least one inorganic salt; and at least one wetting agent. ### Claim 3 (depends on 2) The sizing composition according to claim 2, wherein the at least two binders are polyvinyl alcohol and starch. ### Claim 4 (depends on 3) The sizing composition according to claim 3, wherein the polyvinyl alcohol and starch are present at a starch/polyvinyl alcohol weight ratio of from 8/1 to 1/1. ### Claim 5 (depends on 4) The sizing composition according to claim 4, wherein the total binder is present at an amount ranging at least 20 wt %, based upon the total weight of the solids in of the composition. ### Claim 6 (depends on 4) The sizing composition according to claim 4, further comprising from 20 to 40 wt % based on the total weight of the solids in the composition of an optical brightening agent. ### Claim 7 (depends on 4) The sizing composition according to claim 4, further comprising an optical brightening agent. ### Claim 8 (depends on 7) The sizing composition according to claim 7, wherein the optical brightening agent is cationic. ### Claim 9 (depends on 1) The sizing composition according to claim 1, comprising at least one pigment at an amount of at least 30 wt % based upon the total weight of the solids in of the composition at least one binder at an amount of at least 20 wt % based upon the total weight of the solids in of the composition; at least one cationic nitrogen containing organic species having one or more quaternary ammonium functional groups at an amount ranging from 1 to 20 wt % based upon the total weight of the solids in of the composition; at least one inorganic salt at an amount ranging from 0.5 to 5 wt % based upon the total weight of the solids in of the composition, and at least one wetting agent at an amount ranging from 0.5 to 20 wt % based upon the total weight of the solids. ### Claim 10 (depends on 9) The sizing composition according to claim 9, comprising at least two binders wherein the at least two binders are starch and polyvinyl alcohol at a weight ratio of from 8/1 to 1/1 starch/polyvinyl alcohol; and an optical brightening agent. ### Claim 11 (depends on 1) The sizing composition according to claim 1, wherein the sizing composition further comprises an optical brightening agent. ### Claim 12 (depends on 11) The sizing composition according to claim 11, wherein the optical brightening agent is cationic. ### Claim 13 (depends on 1) The sizing composition according to claim 1, wherein the at least one inorganic salt comprises at least one cationic metal selected from the group consisting of sodium, calcium and magnesium. ### Claim 14 (depends on 1) The sizing composition according to claim 1, wherein the at least one wetting agent has an HLB value of from 4 to 10. ### Claim 15 (depends on 14) The sizing composition according to claim 14, wherein the at least one wetting agent is at least one of: pyrrolidone; caprylyl pyrrolidone; or lauryl pyrrolidone. ### Claim 16 (depends on 1) The sizing composition according to claim 1, wherein the at least one wetting agent is non-ionic. ### Claim 17 (depends on 1) The sizing composition according to claim 1, wherein the at least one pigment is selected from the group consisting of clay and starch. ### Claim 18 (depends on 1) The sizing composition according to claim 1, wherein the at least one wetting agent has an HLB value of from 12 to 20. ### Claim 19 (depends on 18) The sizing composition according to claim 18, wherein the at least one wetting agent has an HLB value of from 12 to 18. ### Claim 20 (depends on 18) The sizing composition according to claim 18, wherein the at least one wetting agent has an HLB value of from 14 to 20. ### Claim 21 (depends on 18) The sizing composition according to claim 18, wherein the at least one wetting agent is at least one of: an alkoxylate; or an alcohol alkoxylate. ### Claim 22 (depends on 21) The sizing composition according to claim 21, wherein the at least one wetting agent is at least one linear alcohol alkoxylate. ### Claim 23 (depends on 1) The sizing composition according to claim 1, wherein the at least one cationic nitrogen containing organic species having one or more quaternary ammonium functional groups is selected from the group consisting of: polymers and copolymers of diallyldimethyl ammonium chloride (DADMAC).