# US 2018/0022883 A1 · Processing aids for use in manufacture extruded polystyrene foams using low global warming potential blowing agents > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2018/0022883 A1 - Document ID: US20180022883A1 - Status: Published application - Kind: A1 - Application number: 15/724,835 - Filed: 2017-10-04 - Published: 2018-01-25 - Earliest claimed: 2013-03-15 - Assignees: Owens Corning Intellectual Capital, LLC - Applicants: Owens Corning Intellectual Capital, LLC - Inventors: Xiangmin Han; Raymond Marshall Breindel; S. Thomas Brammer; Yadollah Delaviz; Chase J. Boudreaux; Barbara Fabian; Nikoi Annan - Web page: https://patentgrep.com/patent/US20180022883A1 ## CPC - C08J 9/0009: {Phase change materials} - B29B 7/42: with screw or helix - B29B 7/603: {in measured doses, e.g. proportioning of several materials} - B29B 7/7409: {with supply of gas} - B29B 7/94: Liquid charges - B29C 48/022: {characterised by the choice of material} - C08J 9/009: {Use of pretreated compounding ingredients} - C08J 9/08: developing carbon dioxide - C08J 9/122: {Hydrogen, oxygen, CO2, nitrogen or noble gases} - C08J 9/146: {only fluorine as halogen atoms} - B29C 48/297: {at several locations, e.g. using several hoppers or using a separate additive feeding} - B29K 2025/06: {PS, i.e. polystyrene} - B29K 2105/04: cellular or porous - B29K 2105/048: {Expandable particles, beads or granules} - C08J 2201/03: Extrusion of the foamable blend - C08J 2203/02: CO2-releasing, e.g. NaHCO3 and citric acid - C08J 2203/06: CO2, N2 or noble gases - C08J 2203/142: Halogenated saturated hydrocarbons, e.g. H3C-CF3 - C08J 2203/162: Halogenated unsaturated hydrocarbons, e.g. H2C=CF2 - C08J 2205/044: Micropores, i.e. average diameter being between 0,1 micrometer and 0,1 millimeter - C08J 2205/046: Unimodal pore distribution - C08J 2205/052: Closed cells, i.e. more than 50% of the pores are closed - C08J 2205/10: Rigid foams - C08J 2325/06: Polystyrene - 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) - B29K: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR {MOULDS, } REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS ## Abstract A foamable polymeric mixture is provided that includes a polymer composition and at least one blowing agent. The blowing agent may comprise any blowing agents known not to deplete the ozone or increase the prevalence of global warming, such as CO2, HFO, HFC and mixtures thereof. The foamable polymeric mixture may further includes at least one processing aid comprising an organic phase changing material. The inventive foamable mixture is capable of processing at a pressure range of 800 to 1200 psi (5.5 to 8.3 MPa). ## Claims ### Claim 1 A foamed insulation product comprising: a polymeric foam composition comprising: polystyrene; a blowing agent composition comprising carbon dioxide and at least one of hydrofluoroolefins and hydrofluorocarbons, and from 0.05 to 3 wt. % of an organic phase changing material, based upon the weight of the polymeric foam composition, wherein the organic phase changing material has a transition temperature from liquid to solid at a temperature from −5 to 60° C.; wherein the foamed insulation product has an insulation R-value per inch of between 4 and 7. ### Claim 2 (depends on 1) The foamed insulation product of claim 1, wherein the organic phase changing material comprises at least one of a fatty acid ester and a wax. ### Claim 3 (depends on 2) The foamed insulation product of claim 2, wherein the organic phase changing material comprises a synthetic beeswax. ### Claim 4 (depends on 1) The foamed insulation product of claim 1, wherein the organic phase changing material is microencapsulated. ### Claim 5 (depends on 4) The foamed insulation product of claim 4, wherein the organic phase changing material is microencapsulated by a polymer material comprising one or more of melamine formaldehyde, urea formaldehyde, and acrylate copolymer resins. ### Claim 6 (depends on 1) The foamed insulation product of claim 1, further comprising at least one infrared attenuating agent. ### Claim 7 (depends on 1) The foamed insulation product of claim 1, wherein the foamed insulation product is monomodal. ### Claim 8 (depends on 1) The foamed insulation product of claim 1, wherein the foamed insulation product has a density of from 1 to 5 lbs/ft3. ### Claim 9 (depends on 1) The foamed insulation product of claim 1, wherein the foamed insulation product has a compressive strength between 6 and 80 psi. ### Claim 10 A closed cell, extruded polystyrene foamed insulation product comprising: a polymeric foam composition comprising: polystyrene; a blowing agent composition comprising carbon dioxide and at least one of hydrofluoroolefins and hydrofluorocarbons, and from 0.05 to 3 wt. % of an organic phase changing material, based upon the weight of the polymeric foam composition, wherein the organic phase changing material has a transition temperature from liquid to solid at a temperature from −5 to 60° C.; wherein the closed cell, extruded polystyrene foamed insulation product is monomodal, and wherein the closed cell, extruded polystyrene foamed insulation product has an average cell size of from 0.005 to 0.6 mm. ### Claim 11 (depends on 10) The closed cell, extruded polystyrene foamed insulation product of claim 10, wherein the organic phase changing material comprises at least one of a fatty acid ester and a wax. ### Claim 12 (depends on 10) The closed cell, extruded polystyrene foamed insulation product of claim 10, wherein the closed cell, extruded polystyrene foamed insulation product has an average cell size of from 0.16 to 0.2 mm. ### Claim 13 (depends on 10) The closed cell, extruded polystyrene foamed insulation product of claim 10, wherein the closed cell, extruded polystyrene foamed insulation product has a compressive strength between 20 and 68 psi. ### Claim 14 A method of manufacturing a foamed insulation product, the method comprising: introducing a polymeric composition comprising polystyrene into a screw extruder to form a polymer melt; injecting at least one organic phase changing material and at least one blowing agent into the polymer melt to form a foamable polymeric material, the blowing agent comprising carbon dioxide and at least one of hydrofluoroolefins and hydrofluorocarbons; and extruding the foamable polymeric material through a die under a processing pressure of from 800 to 1200 psi into a region of reduced pressure to produce the foamed insulation product. ### Claim 15 (depends on 14) The method of claim 14, further comprising microencapsulating the organic phase changing material prior to injection into the polymer melt. ### Claim 16 (depends on 14) The method of claim 14, further comprising compounding the organic phase changing material into the polymeric composition to form a masterbatch. ### Claim 17 (depends on 14) The method of claim 14, wherein the extrusion step is operated at a die temperature of from 110 to 130° C. ### Claim 18 (depends on 14) The method of claim 14, wherein the organic phase changing material comprises at least one of a fatty acid ester and a wax. ### Claim 19 (depends on 14) The method of claim 14, wherein the foamed insulation product has an insulation R-value per inch of between 4 and 7. ### Claim 20 (depends on 14) The method of claim 14, wherein the foamed insulation product is monomodal.