# US 11,028,238 B2 · Process for mixing olefin polymer with reactants > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,028,238 B2 - Document ID: US11028238B2 - Status: Granted - Kind: B2 - Application number: 15/564,345 - Filed: 2016-04-08 - Published: 2018-05-24 - Granted: 2021-06-08 - Earliest claimed: 2015-04-10 - Assignees: Borealis AG - Applicants: Borealis AG - Inventors: Hermann Braun; Rebeca Reguillo Carmona; Sascha Kaltenbacher; Katja Klimke; Udo Muster; Hermann Prokschi - Web page: https://patentgrep.com/patent/US11028238B2 ## CPC - C08J 3/12: Powdering or granulating - B29B 7/48: with intermeshing devices, e.g. screws - B29B 7/726: {Measuring properties of mixture, e.g. temperature or density (B29B7/724 takes precedence)} - B29B 7/845: {Venting, degassing or removing evaporated components in devices with rotary stirrers} - B29B 7/88: Adding charges {, i.e. additives} - B29B 9/12: characterised by structure or composition - B29C 48/05: Filamentary, e.g. strands - B29C 48/297: {at several locations, e.g. using several hoppers or using a separate additive feeding} - B29C 48/767: {through a degassing opening of a barrel} - C08F 210/06: Propene - C08F 236/06: Butadiene - C08F 255/02: on to polymers of olefins having two or three carbon atoms - C08L 23/14: Copolymers of propene (C08L23/16 takes precedence) - B29B 7/728: {Measuring data of the driving system, e.g. torque, speed, power, vibration (B29B7/724 takes precedence)} - B29B 9/06: in the form of filamentary material, e.g. combined with extrusion - 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 - 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 - C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06) ## Abstract The present invention is directed to a process for producing a modified olefin polymer having increased melt strength in an extruder. The process comprising the steps of: (A) contacting a stream comprising particles of an olefin polymer with a vapour stream of a functionally unsaturated compound in vapour phase thereby producing a first mixed stream; (B) passing the first mixed stream to an extruder; (C) melting the polymer particles of the first mixed stream in the extruder; (D) introducing a stream of a free radical generator either into the first mixed stream or into the extruder; and (E) extruding the first mixed stream and the free radical generator at a temperature which is greater than the decomposition temperature of the free radical generator and the melting temperature of the olefin polymer but less than the decomposition temperature of the olefin polymer thereby producing the modified olefin polymer in the extruder. ## Claims ### Claim 1 A process for producing a modified olefin polymer, said process comprising the steps of: (A) combining a stream comprising a functionally unsaturated compound, wherein the functionally unsaturated compound is selected from a bifunctionally or multifunctionally unsaturated monomer or mixtures thereof, and a stream comprising a free radical generator to produce a stream of a mixture of functionally unsaturated compound and free radical generator, and passing the stream of the mixture of functionally unsaturated compound and free radical generator through a static mixer; (B) introducing a stream comprising particles of an olefin polymer into an extruder; (C) introducing the stream of the mixture of functionally unsaturated compound and free radical generator into the extruder; (D) melting the particles of the olefin polymer in the extruder to produce a melt stream; and (E) extruding the melt stream at a temperature which is greater than the decomposition temperature of the free radical generator and the melting temperature of the olefin polymer but less than the decomposition temperature of the olefin polymer, thereby producing the modified olefin polymer; wherein the step of introducing the stream of the mixture of functionally unsaturated compound and free radical generator into the extruder takes place in one of a feed zone of the extruder or a melting zone of the extruder and the mixture of the functionally unsaturated compound and free radical compound and free radical generator is thus combined with the stream comprising particles of an olefin polymer or with the melt stream; wherein the stream of the mixture of functionally unsaturated compound and free radical generator is in liquid state and is sprayed into the feed zone of the extruder by means of an atomizing nozzle or wherein the stream of the mixture of functionally unsaturated compound and free radical generator is introduced into the melting zone of the extruder. ### Claim 2 (depends on 1) The process according to claim 1, wherein the stream of the mixture of functionally unsaturated compound and free radical generator is in liquid state and is sprayed into the feed zone of the extruder by means of an atomising nozzle. ### Claim 3 (depends on 1) The process according to claim 1, wherein the stream of the mixture of functionally unsaturated compound and free radical generator is introduced into the melting zone of the extruder.