# US 10,370,494 B2 · Ethleneimine polymer and method for producing same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,370,494 B2 - Document ID: US10370494B2 - Status: Granted - Kind: B2 - Application number: 15/519,675 - Filed: 2014-10-17 - Published: 2017-08-31 - Granted: 2019-08-06 - Earliest claimed: 2014-10-17 - Assignees: Nippon Shokubai Co., Ltd. - Applicants: Nippon Shokubai Co., Ltd - Inventors: Seiichi Suzuki; Taisuke Kasahara - Web page: https://patentgrep.com/patent/US10370494B2 ## CPC - C08G 73/0213: {Preparatory process} - C08G 73/0206: {Polyalkylene(poly)amines} - C09D 11/03: characterised by features other than the chemical nature of the binder - C09D 11/037: characterised by the pigment - C09D 11/106: containing macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds - C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS - 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) ## Abstract Provided is an ethyleneimine polymer which exhibits excellent close adhesion properties and adhesive properties and is unlikely to form a gel-like film, and a method for producing the same. An ethyleneimine polymer, wherein a number average molecular weight (Mn) of the ethyleneimine polymer measured by gel permeation chromatography in terms of pullulan is 13,000 or more, a degree of dispersion of the ethyleneimine polymer is greater than 3.0 and 5.0 or less, and a water content in the ethyleneimine polymer is from 3 to 35% by weight. ## Claims ### Claim 1 An ethyleneimine polymer, wherein a number average molecular weight (Mn) of the ethyleneimine polymer measured by gel permeation chromatography in terms of pullulan is 13,000 or more, a degree of dispersion of the ethyleneimine polymer is 3.1 or more to 4.0 or less, and a water content in the ethyleneimine polymer is from 3 to 10% by weight. ### Claim 2 A method for producing an ethyleneimine polymer, the method comprising: polymerizing ethyleneimine under a temperature condition of higher than 90° C. and 150° C. or lower in the presence of water at from 1.0 to 40% by mass with respect to 100% by mass of the ethyleneimine and a catalyst at from 0.3 to 5% by mass with respect to 100% by mass of the ethyleneimine, wherein a number average molecular weight (Mn) of the ethyleneimine polymer measured by gel permeation chromatography in terms of pullulan is 13,000 or more, a degree of dispersion of the ethyleneimine polymer is 3.1 or more to 4.0 or less, and a water content in the ethyleneimine polymer is from 3 to 10% by weight. ### Claim 3 (depends on 2) The method for producing an ethyleneimine polymer according to claim 2, wherein the catalyst is a water-soluble organic compound having at least one halogen element and a hydrophilic substituent or a water-soluble inorganic acid containing a halogen element. ### Claim 4 (depends on 2) The method for producing an ethyleneimine polymer according to claim 2, further comprising adjusting a water content after the polymerization. ### Claim 5 (depends on 2) The method for producing an ethyleneimine polymer according to claim 2, wherein a method for adding the catalyst is continuous addition. ### Claim 6 (depends on 1) An adhesion promoter for film printing ink comprising: the ethyleneimine polymer according to claim 1. ### Claim 7 (depends on 1) The ethyleneimine polymer according to claim 1, wherein the number average molecular weight (Mn) is 19,000 or more. ### Claim 8 (depends on 1) The ethyleneimine polymer according to claim 1, wherein the number average molecular weight (Mn) is 25,000 or more. ### Claim 9 (depends on 1) The ethyleneimine polymer according to claim 1, wherein the number average molecular weight (Mn) is 50,000 or less. ### Claim 10 (depends on 1) The ethyleneimine polymer according to claim 1, wherein the number average molecular weight (Mn) is 45,000 or less. ### Claim 11 (depends on 1) The ethyleneimine polymer according to claim 1, wherein the number average molecular weight (Mn) is 40,000 or less. ### Claim 12 (depends on 1) The ethyleneimine polymer according to claim 1, wherein the number average molecular weight (Mn) is 13,969 or more and the degree of dispersion is 3.4 or less. ### Claim 13 (depends on 1) The ethyleneimine polymer according to claim 1, wherein the water content is 4% by weight or more. ### Claim 14 (depends on 1) The ethyleneimine polymer according to claim 1, wherein the water content is 5% by weight or more.