# US 7,608,166 B2 · Papers having borate-based complexing and method of making same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 7,608,166 B2 - Document ID: US7608166B2 - Status: Granted - Kind: B2 - Application number: 10/667,238 - Filed: 2003-09-17 - Published: 2005-03-17 - Granted: 2009-10-27 - Earliest claimed: 2003-09-17 - Assignees: International Paper Company - Inventors: Yan C. Huang; Kapil M. Singh; Yaoliang Hong; M. Bruce Lyne - Web page: https://patentgrep.com/patent/US7608166B2 ## CPC - D21H 17/71: {Mixtures of material (D21H17/69 takes precedence); Pulp or paper comprising several different materials not incorporated by special processes (D21H23/10, D21H23/70, D21H23/76 take precedence)} - D21H 17/28: Starch - D21H 17/63: Inorganic compounds - D21H 21/16: Sizing or water-repelling agents - D21H 23/04: Addition to the pulp; After-treatment of added substances in the pulp - D21H 23/24: during paper manufacture - D21H 25/14: the body being a casting drum {, a heated roll or a calender} - 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 paper substrates containing either an internal starch or a size press applied starch and a boron-containing compound and having improved physical and mechanical properties, as well as methods of making and using the same. ## Claims ### Claim 1 A paper or paperboard, comprising cellulosic fibers, and a sizing or coating composition comprising starch; and a boron-containing compound, wherein the amount of boron-containing compound is equal to or less than about 7% by weight of the starch; and greater than 50% of the starch and boron-containing compound is located at least one surface of the web; and wherein at least a portion of the starch and boron-containing compound penetrates the surface of the web. ### Claim 2 (depends on 1) The paper or paperboard of claim 1 wherein the amount of starch is equal to or less than about 200 lbs per ton of fiber. ### Claim 3 (depends on 1) The paper or paperboard of claim 1 wherein the boron-containing compound is selected from the group consisting of boric acid and borate metal salts. ### Claim 4 (depends on 1) The paper or paperboard of claim 1, wherein the boron-containing compound is selected from the group consisting of boric acid, borax, and zinc borate. ### Claim 5 (depends on 1) The paper or paperboard of claim 1 wherein the boron-containing compound and the starch form a complex. ### Claim 6 (depends on 1) The paper or paperboard according to claim 1, wherein the amount of boron-containing compound is from about 0.2% to about 7% by weight of the starch. ### Claim 7 (depends on 1) The paper or paperboard according to claim 1, wherein the amount of boron-containing compound is less than 5% by weight of the starch. ### Claim 8 (depends on 1) The paper or paperboard according to claim 1, wherein the amount of boron-containing compound is from about 0.2 to less than 5% by weight of the starch. ### Claim 9 (depends on 1) The paper or paperboard according to claim 1, further comprising hollow microspheres. ### Claim 10 (depends on 1) The paper or paperboard according to claim 1, wherein the paper or paperboard is at least one member selected from the group consisting of office paper, form paper, envelope paper, label stock paper, bristol paper, printing paper, publication paper, bleached board, and linerboard. ### Claim 11 (depends on 1) The paper or paperboard of claim 1 wherein the starch is selected from the group consisting of corn starch, wheat starch, potato starch, rice starch, tapioca starch, and sago starch. ### Claim 12 (depends on 1) The paper or paperboard of claim 1 wherein the starch is selected from the group consisting of anionic starch, cationic starch and amphipathic starch. ### Claim 13 (depends on 1) A method for making the paper or paperboard according to claim 1, comprising: providing a papermaking furnish comprising cellulosic fibers; forming a fibrous web from the papermaking furnish; drying the web; and sizing or coating the web with the composition to form a sized or coated web. ### Claim 14 (depends on 13) The method of claim 13 further comprising calendering the sized or coated web to provide a finished paper or paperboard. ### Claim 15 (depends on 13) The method according to claim 13, wherein the papermaking furnish further comprises hollow microspheres. ### Claim 16 (depends on 13) The method according to claim 13, wherein the amount of boron-containing compound is from about 0.2% to about 7% by weight of the starch. ### Claim 17 (depends on 13) The method according to claim 13, wherein the amount of boron-containing compound is less than 5% by weight of the starch. ### Claim 18 (depends on 13) The method according to claim 13, wherein the amount of boron-containing compound is from about 0.2 to less than 5% by weight of the starch.