# US 5,707,569 A · Processing aid system for polyolefins > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,707,569 A - Document ID: US5707569A - Status: Granted - Kind: A - Application number: 08/196,740 - Filed: 1994-02-15 - Granted: 1998-01-13 - Earliest claimed: 1994-02-15 - Assignees: E. I. Du Pont de Nemours and Company - Inventors: Donnan Edwin Priester; Charles Winfield Stewart - Web page: https://patentgrep.com/patent/US5707569A ## CPC - C08K 5/175: {containing COOH-groups; Esters or salts thereof} - B29C 48/27: Cleaning; Purging; Avoiding contamination - B29C 48/95: by adding lubricant to the moulding material - C08L 23/02: not modified by chemical after-treatment - C08L 23/0815: {with aliphatic 1-olefins containing one carbon-to-carbon double bond} - B29C 48/03: characterised by the shape of the extruded material at extrusion - C08K 3/36: Silica - C08L 23/0861: Saponified copolymers, e.g. ethylene vinyl alcohol copolymers - C08L 23/0869: with unsaturated acids, e.g. [meth]acrylic acid; with unsaturated esters, e.g. [meth]acrylic acid esters - C08L 23/0876: Salts thereof, i.e. ionomers - C08L 27/16: Homopolymers or copolymers or vinylidene fluoride - C08L 27/18: Homopolymers or copolymers or tetrafluoroethene - C08L 27/20: Homopolymers or copolymers of hexafluoropropene - C08L 29/04: Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids - C08L 2205/03: containing three or more polymers in a blend - C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09) - 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) - C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06) ## Abstract Polar-side-group-containing extrusion adjuvants, such as ethylene diamine tetraacetic acid or ionomer, that counteract the deleterious effect of certain additives such as zinc stearate, used in polyolefins on the performance of fluoropolymer processing aids in polyolefins are taught. ## Claims ### Claim 1 In the process of extruding a composition comprising polyolefin, additive having divalent or trivalent metal cations and organic or inorganic anion, and fluoropolymer processing aid, the improvement comprising incorporating into said composition polar-side-group-containing extrusion adjuvant in an amount effective to counteract the deleterious effect of said additive on performance of said processing aid in extrusion of said composition, said adjuvant being essentially free of fluorine, said deleterious effect being the requirement for an increase in the amount of said processing aid necessary to maintain extrusion performance obtained by said processing aid in the absence of said additive, whereby said increase is unnecessary, said processing aid improving extrusion performance by mitigating against melt fracture, high extrusion pressure, high torque, formation of deposits at the die exit, or fluctuations in extrusion pressure or extrusion rate, said adjuvant having at least four polar side groups. ### Claim 2 Extrusion composition comprising polyolefin, additive having divalent or trivalent metal ions and organic or inorganic anions, fluoropolymer processing aid, and an amount of polar-side-group-containing extrusion adjuvant effective to counteract the deleterious effect of said additive on performance of said processing aid in extrusion of said composition, said adjuvant being essentially free of fluorine, and having at least four polar side groups. ### Claim 3 (depends on 2) The extrusion composition of claim 2, wherein said polar-side-group-containing extrusion adjuvant is polymeric. ### Claim 4 (depends on 3) The extrusion composition of claim 3, wherein said polymeric adjuvant is polyvinylacetate, ethylene/vinyl acetate copolymer, ethylene/acrylic acid copolymer, ethylene/methacrylic acid copolymer, ethylene/vinyl alcohol copolymer, or polyvinyl alcohol. ### Claim 5 (depends on 3) The extrusion composition of claim 3, wherein said polymeric adjuvant is ionomer. ### Claim 6 (depends on 2) The extrusion composition of claim 2, wherein said polar-side-group-containing extrusion adjuvant is ethylene diamine tetraacetic acid or salt thereof. ### Claim 7 (depends on 2) The extrusion composition of claim 2, wherein the concentration of said polar-side-group-containing extrusion adjuvant is less than 2 wt %. ### Claim 8 (depends on 2) The extrusion composition of claim 2, wherein the concentration of said polar-side-group-containing extrusion adjuvant is 50 ppm to 1 wt %. ### Claim 9 Processing aid system composition comprising fluoropolymer processing aid and polar-side-group-containing extrusion adjuvant, said adjuvant being essentially free of fluorine, said system being capable of enhancing extrusion performance of polyolefin which contains additive having divalent or trivalent metal cations and organic or inorganic anions, the proportion of said extrusion adjuvant in said processing aid composition, relative to the amount of processing aid therein, being effective to counteract the deleterious effect of said additive on performance of said processing aid, said adjuvant having at least four polar side groups. ### Claim 10 (depends on 9) The processing aid system composition of claim 9, further comprising polyolefin host resin. ### Claim 11 (depends on 9) The processing aid system composition of claim 9, wherein said extrusion adjuvant is polymeric. ### Claim 12 (depends on 11) The processing aid system composition of claim 11, wherein said polymeric extrusion adjuvant is polyvinylacetate, ethylene/vinyl acetate copolymer, ethylene/acrylic acid copolymer, ethylene/methacrylic acid copolymer, ethylene/vinyl alcohol copolymer, or polyvinyl alcohol. ### Claim 13 (depends on 11) The processing aid system composition of claim 11 wherein said polymeric extrusion adjuvant is ionomer. ### Claim 14 (depends on 9) The processing aid system composition of claim 9, wherein the ratio of said polar-side-group-containing extrusion adjuvant to fluoropolymer processing aid is in the range of about 30/70 to about 95/5 by weight. ### Claim 15 Extruder purge composition comprising polyolefin and an amount of polar-side-group-containing extrusion adjuvant effective to condition an extruder so that start-up time to achieve quality extrusion composition is reduced, said adjuvant being essentially free of fluorine and having at least four polar side groups. ### Claim 16 (depends on 15) The extruder purge composition of claim 15 wherein the extrusion composition comprises polyolefin, additive having divalent or trivalent metal cations and organic or inorganic anions, fluoropolymer processing aid, and polar-side-group-containing extrusion adjuvant, said adjuvant being essentially free of fluorine. ### Claim 17 (depends on 15) The extruder purge composition of claim 15, wherein said adjuvant is ethylene diamine tetraacetic acid or salt thereof or polymer selected from the group consisting of polyvinylacetate, ethylene/vinyl acetate copolymer, ethylene/acrylic acid copolymer, ethylene/methacrylic acid copolymer, ethylene/vinyl alcohol copolymer, and polyvinyl alcohol. ### Claim 18 (depends on 15) The extruder purge composition of claim 15, wherein the concentration of said adjuvant is about 0.1-10 wt %. ### Claim 19 A process for conditioning extrusion equipment, wherein an extruder purge composition is extruded through the extrusion equipment prior to extrusion of an extrusion composition to final product, said purge composition comprising polyolefin and an amount of polar-side-group-containing extrusion adjuvant effective to condition an extruder so that start-up time to achieve quality extrusion of said extrusion composition is reduced, said adjuvant being essentially free of fluorine and having at least four polar side groups. ### Claim 20 (depends on 9) The processing aid system of claim 9 wherein said extrusion adjuvant is ethylene diamine tetraacetic acid or salt thereof. ### Claim 21 (depends on 15) The extruder purge composition of claim 15 wherein said adjuvant is ionomer. ### Claim 22 In the process of extruding a composition comprising polyolefin, additive having divalent or trivalent metal cations and organic or inorganic anions, and fluoropolymer processing aid, the improvement comprising incorporating into said composition polar-side-group-containing extrusion adjuvant, said adjuvant being essentially free of fluorine and having at least four polar side groups. ### Claim 23 (depends on 22) In the process of claim 22, wherein the amount of said polar-side-group-containing extrusion adjuvant is from 50 ppm to less than 2 wt %. ### Claim 24 Extrusion composition comprising polyolefin, additive having divalent or trivalent metal ions and organic or inorganic anions, fluoropolymer processing aid, and from 50 ppm to less than 2 wt % of polar-side-group-containing extrusion adjuvant, said adjuvant being essentially free of fluorine and having at least four polar side groups. ### Claim 25 Processing aid system composition comprising fluoropolymer processing aid and polar-side-group-containing extrusion adjuvant, said adjuvant being essentially free of fluorine and having at least four polar side groups, the ratio of said polar-side-group-containing adjuvant to fluoropolymer processing aid being in the range of about 30/70 to about 95/5 by weight.