# US 10,770,706 B2 · Binder for electricity storage device and binder composition for electricity storage device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,770,706 B2 - Document ID: US10770706B2 - Status: Granted - Kind: B2 - Application number: 15/760,349 - Filed: 2016-11-08 - Published: 2018-09-13 - Granted: 2020-09-08 - Earliest claimed: 2015-11-19 - Assignees: Asahi Kasei Kabushiki Kaisha - Applicants: Asahi Kasei Kabushiki Kaisha - Inventors: Masatoshi Ikemi; Hiroshi Miyazawa - Web page: https://patentgrep.com/patent/US10770706B2 ## CPC - C08L 33/14: of esters containing halogen, nitrogen, sulfur, or oxygen atoms in addition to the carboxy oxygen - C08F 220/1808: {C8-(meth)acrylate, e.g. isooctyl (meth)acrylate or 2-ethylhexyl (meth)acrylate} - C08F 220/286: {and containing polyethylene oxide in the alcohol moiety, e.g. methoxy polyethylene glycol (meth)acrylate} - C08K 3/22: of metals - H01M 4/622: {being polymers} - H01M 10/4235: {Safety or regulating additives or arrangements in electrodes, separators or electrolyte (H01M10/4242 takes precedence)} - H01M 50/414: Synthetic resins, e.g. thermoplastics or thermosetting resins - H01M 50/417: Polyolefins - H01M 50/42: Acrylic resins - H01M 50/437: Glass - H01M 50/446: Composite material consisting of a mixture of organic and inorganic materials - H01M 50/451: comprising layers of only organic material and layers containing inorganic material - C08F 2800/20: as weight or mass percentages - C08K 2003/2227: {of aluminium} - H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries - H01M 50/434: Ceramics - Y02E 60/10: Energy storage using batteries - C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06) - C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS - C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09) - H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract A binder for an electricity storage device comprising a copolymer having an ethylenic unsaturated monomer having a polyalkyleneglycol group (P) as a monomer unit, wherein the average number of repeating units (n) of polyalkyleneglycol groups of the ethylenic unsaturated monomer having a polyalkyleneglycol group (P) is 3 or greater. ## Claims ### Claim 1 A binder for an electricity storage device comprising a copolymer having an ethylenic unsaturated monomer having a polyalkyleneglycol group (P) and a monomer without a polyalkyleneglycol group that is copolymerizable with the ethylenic unsaturated monomer having a polyalkyleneglycol group (P) as a monomer unit, wherein the average number of repeating units (n) of said polyalkyleneglycol group of the ethylenic unsaturated monomer having a polyalkyleneglycol group (P) is 3 or greater, wherein the monomer without a polyalkyleneglycol group comprises ethylenic unsaturated monomers with an amide group (b2) at 0.1 to 10 weight % with respect to 100 weight % of the copolymer, wherein the monomer without a polyalkyleneglycol group further comprises an ethylenic unsaturated monomer with a cycloalkyl group (A) and a (meth)acrylic acid ester monomer (b5), and wherein the total amount of the ethylenic unsaturated monomer with a cycloalkyl group (A) and the (meth)acrylic acid ester monomer (b5) is 50 to 98 weight % with respect to 100 weight % of the copolymer. ### Claim 2 (depends on 1) The binder for an electricity storage device according to claim 1, wherein the copolymer has, as monomer units, 2 to 50 weight % of the ethylenic unsaturated monomer having a polyalkyleneglycol group (P) and the monomer without a polyalkyleneglycol group that is copolymerizable with the ethylenic unsaturated monomer having a polyalkyleneglycol group (P), with respect to 100 weight % of the copolymer. ### Claim 3 (depends on 1) The binder for an electricity storage device according to claim 1, wherein the copolymer has, as monomer units, 10 to 50 weight % of the ethylenic unsaturated monomer having a polyalkyleneglycol group (P) and the monomer without a polyalkyleneglycol group that is copolymerizable with the ethylenic unsaturated monomer having a polyalkyleneglycol group (P), with respect to 100 weight % of the copolymer. ### Claim 4 (depends on 2) The binder for an electricity storage device according to claim 2, wherein the monomer without a polyalkyleneglycol group comprises the ethylenic unsaturated monomers with an amide group (b2), and at least one monomer selected from the group consisting of ethylenic unsaturated monomers with a carboxyl group (b1) and ethylenic unsaturated monomers with a hydroxyl group (b3), at 0.1 to 10 weight % in total with respect to 100 weight % of the copolymer. ### Claim 5 (depends on 2) The binder for an electricity storage device according to claim 2, wherein the monomer without a polyalkyleneglycol group comprises a crosslinkable monomer (b4). ### Claim 6 (depends on 1) The binder for an electricity storage device according to claim 1, wherein the (meth)acrylic acid ester monomer (b5) is a (meth)acrylic acid ester monomer comprising an alkyl group of 4 or more carbon atoms and a (meth)acryloyloxy group. ### Claim 7 (depends on 6) The binder for an electricity storage device according to claim 6, wherein the (meth)acrylic acid ester monomer (b5) is a (meth)acrylic acid ester monomer comprising an alkyl group of 6 or more carbon atoms and a (meth)acryloyloxy group. ### Claim 8 (depends on 6) The binder for an electricity storage device according to claim 6, wherein the ethylenic unsaturated monomer with a cycloalkyl group (A) is cyclohexyl acrylate or cyclohexyl methacrylate. ### Claim 9 (depends on 1) The binder for an electricity storage device according to claim 1, wherein the binder for an electricity storage device is a binder for formation of a filler porous layer. ### Claim 10 (depends on 9) A slurry for formation of a filler porous layer for an electricity storage device, comprising water, the binder for formation of a filler porous layer according to claim 9, and an inorganic filler. ### Claim 11 (depends on 9) A filler porous layer for an electricity storage device, comprising the binder for formation of a filler porous layer according to claim 9, and an inorganic filler. ### Claim 12 (depends on 11) A separator for an electricity storage device, having the filler porous layer for an electricity storage device according to claim 11. ### Claim 13 (depends on 11) A separator for an electricity storage device, comprising the filler porous layer for an electricity storage device according to claim 11, and a polyolefin porous base material. ### Claim 14 (depends on 11) A lithium-ion secondary battery, comprising the filler porous layer for an electricity storage device according to claim 11. ### Claim 15 (depends on 1) The binder for an electricity storage device according to claim 1, wherein the binder for an electricity storage device is a binder for an electrode. ### Claim 16 (depends on 3) The binder for an electricity storage device according to claim 3, wherein the monomer without a polyalkyleneglycol group comprises ethylenic unsaturated monomers with an amide group (b2), and at least one monomer selected from the group consisting of ethylenic unsaturated monomers with a carboxyl group (b1) and ethylenic unsaturated monomers with a hydroxyl group (b3), at 0.1 to 10 weight % in total with respect to 100 weight % of the copolymer. ### Claim 17 (depends on 3) The binder for an electricity storage device according to claim 3, wherein the monomer without a polyalkyleneglycol group comprises a crosslinkable monomer (b4). ### Claim 18 (depends on 4) The binder for an electricity storage device according to claim 4, wherein the monomer without a polyalkyleneglycol group comprises a crosslinkable monomer (b4). ### Claim 19 (depends on 2) The binder for an electricity storage device according to claim 2, wherein the (meth)acrylic acid ester monomer (b5) is a (meth)acrylic acid ester monomer comprising an alkyl group of 4 or more carbon atoms and a (meth)acryloyloxy group. ### Claim 20 (depends on 3) The binder for an electricity storage device according to claim 3, wherein the (meth)acrylic acid ester monomer (b5) is a (meth)acrylic acid ester monomer comprising an alkyl group of 4 or more carbon atoms and a (meth)acryloyloxy group.