# US 11,898,015 B2 · Coated olefin-based polymers with reduced blocking > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,898,015 B2 - Document ID: US11898015B2 - Status: Granted - Kind: B2 - Application number: 17/256,995 - Filed: 2019-06-28 - Published: 2021-11-25 - Granted: 2024-02-13 - Earliest claimed: 2018-06-29 - Assignees: Dow Global Technologies LLC - Applicants: Dow Global Technologies LLC - Inventors: Shrikant Dhodapkar; Remi A. Trottier; George W. Haun, Jr.; Harold W. Boone; Intan M. Hamdan; Michael D. Turner - Web page: https://patentgrep.com/patent/US11898015B2 ## CPC - C08J 3/126: {Polymer particles coated by polymer, e.g. core shell structures} - B29B 9/16: Auxiliary treatment of granules - C08J 3/124: {Treatment for improving the free-flowing characteristics} - C08J 3/128: {Polymer particles coated by inorganic and non-macromolecular organic compounds} - B29B 9/06: in the form of filamentary material, e.g. combined with extrusion - B29B 2009/125: {Micropellets, microgranules, microparticles} - B29B 2009/163: {Coating, i.e. applying a layer of liquid or solid material on the granule} - C08J 2323/16: Ethene-propene or ethene-propene-diene copolymers - C08J 2383/07: containing silicon bound to unsaturated aliphatic groups - 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) - B29B: PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS ## Abstract A process to form coated polymer particles comprising polymer particles formed from a polymer composition comprising an olefin-based polymer, and a coating formed from a coating composition comprising an aqueous metal acid dispersion and an aqueous polysiloxane emulsion, said process comprising the following: mixing together the aqueous metal acid dispersion and the aqueous polysiloxane emulsion to form a dispersion/emulsion mixture; applying the dispersion/emulsion mixture to a portion of the surfaces of the polymer particles to form wet-coated polymer particles; drying the wet-coated polymer particles to form the coated polymer particles. The aqueous metal acid dispersion and the aqueous polysiloxane emulsion may also be applied, individually, in separate steps. ## Claims ### Claim 1 A process to form coated polymer particles, comprising polymer particles formed from a polymer composition comprising an olefin-based polymer, and a coating formed from a coating composition comprising an aqueous metal fatty acid dispersion, and an aqueous polysiloxane emulsion, said process comprising the following: mixing together the aqueous metal fatty acid dispersion and the aqueous polysiloxane emulsion to form a dispersion/emulsion mixture; applying the dispersion/emulsion mixture to a portion of the surfaces of polymer particles, to form wet-coated polymer particles; drying the wet-coated polymer particles to form the coated polymer particles. ### Claim 2 (depends on 1) The process of claim 1, wherein the metal fatty acid comprises a metal stearate. ### Claim 3 (depends on 1) The process of claim 1, wherein the weight ratio of the polysiloxane to the metal fatty acid, in the coated polymer particles, is from 0.10 to 10.0. ### Claim 4 (depends on 1) The process of claim 1, wherein the metal fatty acid is present in an amount from 2 ppm to 5000 ppm, based on the weight of the coated polymer particles. ### Claim 5 (depends on 1) The process of claim 1, wherein the polysiloxane is present in an amount from 20 ppm to 500 ppm, based on the weight of the coated polymer particles. ### Claim 6 (depends on 1) The process of claim 1, wherein the metal fatty acid is mixture of calcium stearate (C18) and calcium palmitate (C16). ### Claim 7 (depends on 1) The process of claim 1, wherein the polysiloxane is polydimethylsiloxane (PDMS). ### Claim 8 (depends on 1) The process of claim 1, wherein the olefin-based polymer is an ethylene-based polymer or a propylene-based polymer. ### Claim 9 (depends on 8) The process of claim 8, wherein the ethylene-based polymer is an ethylene/alpha-olefin interpolymer and the propylene-based polymer is a propylene/alpha-olefin interpolymer. ### Claim 10 (depends on 1) The process of claim 1, wherein the olefin-based polymer is an ethylene/alpha-olefin/diene terpolymer. ### Claim 11 A process to form coated polymer particles, comprising polymer particles formed from a polymer composition comprising an olefin-based polymer, and a coating formed from a coating composition comprising an aqueous metal fatty acid dispersion, and an aqueous polysiloxane emulsion, said process comprising the following: A) applying the aqueous polysiloxane emulsion to a portion of the surfaces of polymer particles to form emulsion-coated polymer particles; B) applying the aqueous metal fatty acid dispersion to a portion of the surfaces of the emulsion-coated polymer particles to form dispersion-emulsion-coated polymer particles; C) drying the dispersion-emulsion-coated polymer particles to form the coated polymer particles; and wherein, optionally, the emulsion-coated polymer particles from step A are dried, before step B. ### Claim 12 A process to form coated polymer particles comprising polymer particles formed from a polymer composition comprising an olefin-based polymer, and a coating formed from a coating composition comprising an aqueous metal fatty acid dispersion, and an aqueous polysiloxane emulsion, said process comprising the following: A) applying the aqueous metal fatty acid dispersion to a portion of the surfaces of polymer particles to form dispersion-coated polymer particles; B) applying the aqueous polysiloxane emulsion to a portion of the surfaces of the dispersion-coated polymer particles to form emulsion-dispersion-coated polymer particles; C) drying the emulsion-dispersion-coated polymer particles to form the coated polymer particles; and wherein, optionally, the dispersion-coated polymer particles from step A are dried, before step B.