# US 2021/0277215 A1 · Ionomer compositions > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0277215 A1 - Document ID: US20210277215A1 - Status: Published application - Kind: A1 - Application number: 17/260,068 - Filed: 2019-07-15 - Published: 2021-09-09 - Earliest claimed: 2018-07-31 - Assignees: Performance Materials NA, Inc. - Applicants: Performance Materials NA, Inc. - Inventors: Xian Jiang - Web page: https://patentgrep.com/patent/US20210277215A1 ## CPC - C08L 23/0876: Salts thereof, i.e. ionomers - C08F 210/02: Ethene - C08F 220/06: Acrylic acid; Methacrylic acid; Metal salts or ammonium salts thereof - C08F 220/1804: {C4-(meth)acrylate, e.g. butyl (meth)acrylate, isobutyl (meth)acrylate or tert-butyl (meth)acrylate} - C08K 5/09: Carboxylic acids; Metal salts thereof; Anhydrides thereof - C08L 2201/12: Shape memory - 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) ## Abstract Described in embodiments herein are ionomers comprising a neutralized blend of an ethylene acid copolymer, an aliphatic and a mono-functional organic acid. The blend includes from 40 wt % to 95 wt % of the ethylene acid copolymer, from 5 to 50 wt % of the aliphatic, mono-functional organic acid, based on the total weight of the blend. The ethylene acid copolymer is the polymerized reaction product of ethylene, from 1 to 25 wt % of monocarboxylic acid and from 1 to 40 wt % of alkyl acrylate, based on the total weight of the monomers present in the ethylene acid copolymer. The aliphatic, mono-functional organic acid has fewer than 36 carbon atoms. In various embodiments, at least 70 mole % of total acid units are neutralized with both a trivalent cation and either a mono- or di-valent cation. ## Claims ### Claim 1 An ionomer comprising a neutralized blend of an ethylene acid copolymer and an aliphatic, mono-functional organic acid, wherein the blend comprises: from 40 to 95 wt % of the ethylene acid copolymer, based on the total weight of the blend, the ethylene acid copolymer being the polymerized reaction product of: ethylene, and from 1 to 25 wt % of monocarboxylic acid, based on the total weight of monomer present in the ethylene acid copolymer; and from 1 to 40 wt % of softening comonomer, based on the total weight of monomer present in the ethylene acid copolymer; and from 5 to 50 wt % of the aliphatic, mono-functional organic acid, based on the total weight of the blend, wherein the aliphatic, mono-functional organic acid has fewer than 36 carbon atoms; wherein at least 70 mole % of total acid units are neutralized with a cation source comprising (a) a trivalent cation and (b) either a mono- or di-valent cation. ### Claim 2 (depends on 1) The ionomer of claim 1, wherein the monocarboxylic acid comprises one or more of acrylic acid, methacrylic acid, or combinations thereof. ### Claim 3 (depends on 1) The ionomer of claim 1, wherein the softening comonomer is an alkyl acrylate selected from the group consisting of methyl acrylate, ethyl acrylate, n-butyl acrylate or iso-butyl acrylate, or combinations thereof. ### Claim 4 (depends on 1) The ionomer of claim 1, wherein the ionomer has a melt index, 12, of 0.1 to 30 g/10 min, as determined in accordance with ASTM D1238 (220° C., 2.16 kg). ### Claim 5 (depends on 1) The ionomer of claim 1, wherein the ionomer has a density of 0.920 to 0.980 g/cc. ### Claim 6 (depends on 1) The ionomer of claim 1, wherein the mono- or di-valent cation is selected from the group consisting of a magnesium, sodium, zinc, lithium, and potassium cation. ### Claim 7 (depends on 1) The ionomer of claim 1, wherein the blend comprises from 60 to 80 wt % of the ethylene acid copolymer. ### Claim 8 (depends on 7) The ionomer of claim 7, wherein the blend comprises from 15 to 35 wt % of the aliphatic, mono-functional organic acid. ### Claim 9 (depends on 1) The ionomer of claim 1, wherein at least 90 mole % of total acid units are neutralized with a cation source comprising (a) a trivalent cation and (b) either a mono- or di-valent cation ### Claim 10 (depends on 9) The ionomer of claim 9, wherein 100 mole % of the total acid units are neutralized using an amount of the cation source in excess of the amount required to neutralize 100% of the total acid units. ### Claim 11 (depends on 1) A molded article or a foam comprising the ionomer of claim 1. ### Claim 12 (depends on 11) The molded article or foam of claim 11, wherein the molded article exhibits a creep resistance as defined by a dimensional change of less than 50% at 100° C. under a load of 30 g at a stress of 46 kPa after 30 minutes. ### Claim 13 (depends on 11) The molded article or foam of claim 11, wherein the molded article exhibits a creep resistance as defined by a dimensional change of less than 200% at 100° C. under a load of 100 g at a stress of 150 kPa after 30 minutes. ### Claim 14 (depends on 11) The molded article or foam of claim 11, wherein the molded article exhibits a creep resistance as defined by a dimensional change of less than 15% at 100° C. under a load of 100 g at a stress of 150 kPa after 30 minutes. ### Claim 15 (depends on 11) The molded article or foam claim 11, wherein the molded article exhibits a creep resistance as defined by a dimensional change of less than 500% at 50° C. under a load of 400 g at a stress of 600 kPa after 96 hours.