# US 2014/0155550 A1 · Thermoplastic elastomer composition > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0155550 A1 - Document ID: US20140155550A1 - Status: Published application - Kind: A1 - Application number: 14/087,942 - Filed: 2013-11-22 - Published: 2014-06-05 - Earliest claimed: 2012-12-05 - Assignees: Sumitomo Rubber Industries, Ltd. - Applicants: Sumitomo Rubber Industries, Ltd. - Inventors: Katsushi YAMAMOTO - Web page: https://patentgrep.com/patent/US20140155550A1 ## CPC - C08L 23/16: Ethylene-propylene or ethylene-propylene-diene copolymers - C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06) ## Abstract A thermoplastic elastomer composition is free from halogens such as bromine, and is comparable or superior in tensile characteristic to a conventional thermoplastic elastomer composition containing a brominated alkylphenol formaldehyde resin as a crosslinking agent. The composition contains an EPDM containing 5-ethylidene-2-norbornene as a diene component, 75 to 300 mass % of an alkylphenol formaldehyde resin having methylol groups at opposite molecular terminals thereof as a crosslinking agent based on the diene amount of the EPDM, 0.7 to 3 mass % of a strong Bronsted acid as a catalyst based on the amount of the alkylphenol formaldehyde resin, and a thermoplastic resin. ## Claims ### Claim 1 A thermoplastic elastomer composition comprising: an ethylene propylene diene rubber comprising 5-ethylidene-2-norbornene as a diene component; not less than 75 mass % and not greater than 300 mass % of an alkylphenol formaldehyde resin having methylol groups at opposite molecular terminals thereof as a crosslinking agent based on a diene amount of the ethylene propylene diene rubber; not less than 0.7 mass % and not greater than 3 mass % of a strong Bronsted acid as a catalyst based on an amount of the alkylphenol formaldehyde resin; and a thermoplastic resin. ### Claim 2 (depends on 1) The thermoplastic elastomer composition according to claim 1, wherein the alkylphenol formaldehyde resin is present in a proportion of not less than 3 parts by mass and not greater than 9 parts by mass based on 100 parts by mass of the ethylene propylene diene rubber. ### Claim 3 (depends on 1) The thermoplastic elastomer composition according to claim 1, wherein the strong Bronsted acid is p-toluenesulfonic acid monohydrate. ### Claim 4 (depends on 2) The thermoplastic elastomer composition according to claim 2, wherein the strong Bronsted acid is p-toluenesulfonic acid monohydrate. ### Claim 5 (depends on 1) The thermoplastic elastomer composition according to claim 1, wherein the thermoplastic resin is a polypropylene. ### Claim 6 (depends on 2) The thermoplastic elastomer composition according to claim 2, wherein the thermoplastic resin is a polypropylene. ### Claim 7 (depends on 3) The thermoplastic elastomer composition according to claim 3, wherein the thermoplastic resin is a polypropylene. ### Claim 8 (depends on 4) The thermoplastic elastomer composition according to claim 4, wherein the thermoplastic resin is a polypropylene. ### Claim 9 (depends on 1) The thermoplastic elastomer composition according to claim 1, wherein the thermoplastic resin is present in a proportion of not less than 10 parts by mass and not greater than 400 parts by mass based on 100 parts by mass of the ethylene propylene diene rubber. ### Claim 10 (depends on 2) The thermoplastic elastomer composition according to claim 2, wherein the thermoplastic resin is present in a proportion of not less than 10 parts by mass and not greater than 400 parts by mass based on 100 parts by mass of the ethylene propylene diene rubber. ### Claim 11 (depends on 3) The thermoplastic elastomer composition according to claim 3, wherein the thermoplastic resin is present in a proportion of not less than 10 parts by mass and not greater than 400 parts by mass based on 100 parts by mass of the ethylene propylene diene rubber. ### Claim 12 (depends on 4) The thermoplastic elastomer composition according to claim 4, wherein the thermoplastic resin is present in a proportion of not less than 10 parts by mass and not greater than 400 parts by mass based on 100 parts by mass of the ethylene propylene diene rubber. ### Claim 13 (depends on 5) The thermoplastic elastomer composition according to claim 5, wherein the thermoplastic resin is present in a proportion of not less than 10 parts by mass and not greater than 400 parts by mass based on 100 parts by mass of the ethylene propylene diene rubber. ### Claim 14 (depends on 6) The thermoplastic elastomer composition according to claim 6, wherein the thermoplastic resin is present in a proportion of not less than 10 parts by mass and not greater than 400 parts by mass based on 100 parts by mass of the ethylene propylene diene rubber. ### Claim 15 (depends on 7) The thermoplastic elastomer composition according to claim 7, wherein the thermoplastic resin is present in a proportion of not less than 10 parts by mass and not greater than 400 parts by mass based on 100 parts by mass of the ethylene propylene diene rubber. ### Claim 16 (depends on 8) The thermoplastic elastomer composition according to claim 8, wherein the thermoplastic resin is present in a proportion of not less than 10 parts by mass and not greater than 400 parts by mass based on 100 parts by mass of the ethylene propylene diene rubber.