# US 10,501,611 B2 · Dip-formed article > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,501,611 B2 - Document ID: US10501611B2 - Status: Granted - Kind: B2 - Application number: 15/533,303 - Filed: 2015-11-30 - Published: 2017-11-30 - Granted: 2019-12-10 - Earliest claimed: 2014-12-25 - Assignees: Zeon Corporation - Applicants: Zeon Corporation - Inventors: Shinji Kato - Web page: https://patentgrep.com/patent/US10501611B2 ## CPC - C08L 9/10: Latex (C08L9/04, C08L9/08 take precedence) - A41D 19/0096: {Means for resisting mechanical agressions, e.g. cutting or piercing} - A41D 19/04: Appliances for making gloves; Measuring devices for glove-making - B29C 41/003: {characterised by the choice of material} - B29C 41/14: Dipping a core {(B29C41/10 takes precedence)} - C08F 236/08: Isoprene - C08J 5/02: Direct processing of dispersions, e.g. latex, to articles - A41D 19/0062: {made of one layer of material} - B29K 2007/00: Use of natural rubber as moulding material - B29K 2033/18: Polymers of nitriles - B29K 2105/0002: {monomers or prepolymers} - B29K 2105/0064: {Latex, emulsion or dispersion} - B29L 2031/4864: {Gloves} - C08J 2309/02: Copolymers with acrylonitrile - C08J 2309/04: Latex - C08J 2309/10: Latex (C08J2309/04, C08J2309/08 take precedence) - C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06) - A41D: OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES - B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00) - C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS - C08J: WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H (working, e.g. shaping, of plastics B29) - B29K: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR {MOULDS, } REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS - B29L: INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES ## Abstract Disclosed is a dip-formed article obtained by dip-molding a latex composition for dip-forming, which contains a crosslinking agent and a latex for dip-forming containing a copolymer composed of 40-80% by weight of conjugated diene monomer units (A) containing an isoprene unit, 20-45% by weight of ethylenically unsaturated nitrile monomer units (B), and 2-15% by weight of ethylenically unsaturated acid monomer units (C), and having a weight ratio of butadiene unit content to isoprene unit content that falls within the range of 60:40 to 100:0. Tear strength is at least 50 N/mm, tensile strength is at least 25 MPa, and oil swelling rate does not exceed 5%. ## Claims ### Claim 1 A dip-formed article obtained by dip-forming a dip-forming latex composition including: a dip-forming latex containing a copolymer containing 40 to 80% by weight of conjugated diene monomer units (A) containing an isoprene unit, 20 to 45% by weight of ethylenically unsaturated nitrile monomer units (B), and 2 to 15% by weight of ethylenically unsaturated acid monomer units (C), the conjugated diene monomer units (A) containing the isoprene unit and a butadiene unit at a weight ratio of 70:30 to 95:5 (isoprene unit:butadiene unit); and a crosslinking agent, wherein the dip-formed article has a tear strength of 50 N/mm or more, a tensile strength of 25 MPa or more, and an oil swelling ratio of 5% or less. ### Claim 2 (depends on 1) The dip-formed article according to claim 1, wherein the ethylenically unsaturated nitrile monomer units (B) are acrylonitrile units. ### Claim 3 (depends on 1) The dip-formed article according to claim 1, wherein the ethylenically unsaturated acid monomer units (C) are ethylenically unsaturated monocarboxylic acid monomer units. ### Claim 4 (depends on 1) The dip-formed article according to claim 1, wherein the ethylenically unsaturated acid monomer units (C) are methacrylic acid units. ### Claim 5 (depends on 1) The dip-formed article according to claim 1, wherein the copolymer contains other monomer units (D) other than the conjugated diene monomer units (A), the ethylenically unsaturated nitrile monomer units (B), or the ethylenically unsaturated acid monomer units (C), and a content of the other monomer units (D) is 10% by weight or less with respect to 100% by weight of total monomer units. ### Claim 6 (depends on 1) The dip-formed article according to claim 1, wherein the copolymer contains other monomer units (D) other than the conjugated diene monomer units (A), the ethylenically unsaturated nitrile monomer units (B), or the ethylenically unsaturated acid monomer units (C), and a content of the other monomer units (D) is 5% by weight or less with respect to 100% by weight of total monomer units. ### Claim 7 (depends on 1) The dip-formed article according to claim 1, wherein the copolymer is formed only of the conjugated diene monomer units (A), the ethylenically unsaturated nitrile monomer units (B), and the ethylenically unsaturated acid monomer units (C). ### Claim 8 (depends on 1) The dip-formed article according to claim 1, wherein an addition amount of the crosslinking agent in the dip-forming latex composition is from 0.01 to 5 parts by weight with respect to 100 parts by weight of a solid content in the dip-forming latex. ### Claim 9 (depends on 1) The dip-formed article according to claim 1, wherein a solid content concentration of the dip-forming latex composition is from 5 to 40% by weight. ### Claim 10 (depends on 1) The dip-formed article according to claim 1, having a thickness of 0.05 to 3 mm. ### Claim 11 (depends on 1) The dip-formed article according to claim 1, obtained by an anode coagulant dipping method.