WO2009124753A1 - Low emission polymer composition - Google Patents

Low emission polymer composition Download PDF

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Publication number
WO2009124753A1
WO2009124753A1 PCT/EP2009/002617 EP2009002617W WO2009124753A1 WO 2009124753 A1 WO2009124753 A1 WO 2009124753A1 EP 2009002617 W EP2009002617 W EP 2009002617W WO 2009124753 A1 WO2009124753 A1 WO 2009124753A1
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WIPO (PCT)
Prior art keywords
polymer composition
composition according
component
amount
base resin
Prior art date
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PCT/EP2009/002617
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French (fr)
Inventor
Markus Gahleitner
Erwin Kastner
Hartmut Siebert
Manfred Stadlbauer
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Borealis Technology Oy
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Application filed by Borealis Technology Oy filed Critical Borealis Technology Oy
Priority to EP09729849A priority Critical patent/EP2262858B1/en
Priority to US12/936,575 priority patent/US8344069B2/en
Priority to ES09729849T priority patent/ES2407640T3/en
Priority to CN200980112656XA priority patent/CN101990559B/en
Priority to BRPI0911504A priority patent/BRPI0911504B1/en
Publication of WO2009124753A1 publication Critical patent/WO2009124753A1/en

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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F297/00—Macromolecular compounds obtained by successively polymerising different monomer systems using a catalyst of the ionic or coordination type without deactivating the intermediate polymer
    • C08F297/06—Macromolecular compounds obtained by successively polymerising different monomer systems using a catalyst of the ionic or coordination type without deactivating the intermediate polymer using a catalyst of the coordination type
    • C08F297/08—Macromolecular compounds obtained by successively polymerising different monomer systems using a catalyst of the ionic or coordination type without deactivating the intermediate polymer using a catalyst of the coordination type polymerising mono-olefins
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/10—Homopolymers or copolymers of propene
    • C08L23/12—Polypropene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F110/00—Homopolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
    • C08F110/04—Monomers containing three or four carbon atoms
    • C08F110/06—Propene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F210/00—Copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
    • C08F210/16—Copolymers of ethene with alpha-alkenes, e.g. EP rubbers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend

Definitions

  • the present invention relates to a polymer composition with low amounts of volatiles and fogging and good mechanical properties comprising a propylene homopolymer, an ethylene copolymer with one or more comonomers selected from alpha-olefins with 4 to 12 carbon atoms, and optionally an ethylene homopolymer.
  • the present invention further relates to a process for preparing such a polymer composition and the use of such a polymer composition for preparing injection molded articles e.g. in automotive applications.
  • EP 1 373 403 discloses a heterophasic propylene polymer comprising 60 to 90 wt% of a propylene homopolymer and 10 to 25 wt% of a single-site based ethylene copolymer.
  • talc filled polypropylene is widely used in automobile and appliance applications. These composites have good surface quality, low shrinkage, high stiffness, good tensile properties and creep resistance.
  • VOC volatile organic compounds
  • Those VOCs are supposed to be produced during the extrusion or compounding step.
  • Reducing emissions from the polymeric material applied in automobile interior is a general target for several years. This target has been pursued by applying purification steps in the production of the respective polymeric material (e.g. steam stripping, vacuum degassing and low input compounding) or by using special additives (e.g. high performance stabilizers and absorbers). Examples for such processes are disclosed in EP 1364760 A1 and EP 1535718 A1. These processes involve, however, increased investment cost and reduced output rates, deteriorating the economic situation of the resulting products.
  • EP 1 788 022 suggests to blend a propylene containing an ethylene-propylene copolymer with a very low intrinsic viscosity with a polypropylene having a density between 905 and 930 kg/m 3 .
  • those materials have a glossy surface which is not appreciated by automobile designers.
  • the present invention resides in the finding that emissions and volatiles can be greatly diminished by using a propylene homopolymer with a MWD of 1.5 to 5.0. In order to achieve good mechanical properties, the propylene homopolymer is blended with an ethylene copolymer having a density of not greater than 920 kg/m 3 as impact modifier.
  • compositions show good impact and stiffness properties together with low levels of volatiles and emissions of the granulated compositions as well as of injection molded test specimen. Furthermore, the injection molded test specimen with a grained surface structure comprising such compositions show an improved scratch resistance to gloss balance.
  • the present invention therefore relates to a polymer composition
  • a polyolefin base resin comprising
  • polyolefin base resin has a weight ratio of propylene homopolymer (A) to ethylene copolymer (B) from 95:5 to 60:40.
  • Component (A) may consist of a single propylene homopolymer, but may also comprise a mixture of different propylene homopolymers. This also applies for all preferred embodiments of component (A).
  • component (B) may consist of a single ethylene copolymer but may also comprise a mixture of different ethylene copolymers. This also applies for all preferred embodiments of component (B).
  • the polyolefin base resin consists of components (A) and (B).
  • Propylene homopolymer (A) preferably is present in an amount of 60 to 95 wt%, more preferably 61 to 90 wt%, most preferably 62 to 85 wt% based on the total polyolefin base resin.
  • component (A) has a weight average molecular weight Mw of 100 to 500 kg/mol, more preferably 150 to 350 kg/mol, and a number average molecular weight Mn of 20 to 200 kg/mol, more preferably 50 to 150 kg/mol, determined by GPC according to ISO 16014- 1 , and -4.
  • Component (A) has a MWD of 1.5 to 5.0, preferably 2.0 to 4.0, most preferably 2.2 to 3.5.
  • propylene homopolymer (A) has a melt flow rate MFR (2.16 kg, 230 0 C) of 2 to 200 g/10 min, more preferably of 5 to 50 g/10 min.
  • the MFR (2.16 kg, 230 0 C) for polypropylene and the MFR (2.16 kg, 190 0 C) for polyethylene is determined according to ISO 1133. Melt flow rate and average molecular weight are inversely related to each other, i.e. higher melt flow rate is equivalent to lower average molecular weight and vice versa. Further, the higher the melt flow rate, the lower the viscosity of the polymeric material. It is especially preferred that the propylene homopolymer (A) has an amount of xylene cold solubles (XS) of not more than 2.0 wt%, preferably not more than 1.0 wt%.
  • XS xylene cold solubles
  • the propylene homopolymer (A) has a melting point as determined by differential scanning calorimetry (DSC) of not more than 160 0 C, preferably not more than 155°C.
  • the propylene homopolymer (A) may be produced by a single- or multistage process polymerization of propylene such as bulk polymerization, gas phase polymerization, slurry polymerization, solution polymerization or combinations thereof preferably using a single site catalyst.
  • a homopolymer can be made either in loop reactors or in a combination of loop and gas phase reactor. Those processes are well known to one skilled in the art.
  • a suitable catalyst for the polymerization of the propylene homopolymer is any stereospecific single-site catalyst for propylene polymerization which is capable of polymerizing propylene at a temperature of 40 to 110 0 C and at a pressure from 10 to 100 bar.
  • Suitable single-site catalysts are metallocene catalysts as described for example in EP 1741725 A1 and EP 0943631 A1.
  • the ethylene copolymer (B) preferably is present in an amount of 5 to 40 wt%, more preferably in an amount of 10 to 39 wt%, most preferably in an amount of 15 to 38 wt% based on the total polyolefin base resin.
  • ethylene copolymer (B) has a density of not greater than 920 kg/m 3 , preferably not greater than 905 kg/m 3 , most preferably not greater than 895 kg/m 3 .
  • component (B) is at least 865 kg/m 3 , more preferably 870 kg/m 3 , most preferably 875 kg/m 3 . It is preferred that component (B) has a weight average molecular weight Mw of 40 to 160 kg/mol, more preferably 60 to 120 kg/mol, and a number average molecular weight Mn of 10 to 80 kg/mol, more preferably 15 to 70 kg/mol, determined by GPC according to ISO 16014-1 , and -4.
  • the ethylene copolymer (B) preferably has a MWD of 1.5 to 5.0, more preferably 2.0 to 4.0, most preferably 2.2 to 3.5.
  • ethylene copolymer (B) has a melt flow rate MFR (2.16 kg, 190 0 C) of at least 5.0 g/10 min, more preferably of at least 10.0 g/10 min.
  • melt flow rate MFR (2.16 kg, 190 0 C) of component (B) is preferably not higher than 100 g/10 min, more preferably not higher than 50 g/10 min.
  • ethylene copolymer (B) has a comonomer content of 5 to 40 wt%, more preferably 7.5 to 30 wt%, most preferably 10 to 25 wt%, based on the total component (B).
  • the comonomers of component (B) are selected from alpha-olefins with 4 to 12 carbon atoms, preferably from a group consisting of 1-butene, 1- hexene, 4-methyl-1-pentene and 1-octene. Especially preferred are 1- hexene and 1-octene.
  • the ethylene copolymer (B) may be produced by a single- or multistage process polymerization of ethylene and alpha-olefins such as bulk polymerization, gas phase polymerization, slurry polymerization, solution polymerization or combinations thereof preferably using a single site catalyst.
  • a copolymer can be made either in loop reactors or in a combination of loop and gas phase reactor. Those processes are well known to one skilled in the art.
  • a suitable catalyst for the polymerization of the ethylene homopolymer is any single-site catalyst for ethylene polymerisation which is capable of copolymerizing ethylene and comonomers at a temperature of 40 to 110 0 C and at a pressure from 10 to 100 bar.
  • Suitable single-site catalysts are metallocene catalysts as described for example in EP 1646668 A1 and EP 1292626 A1.
  • the polyolefin base resin according to the present invention has a weight ratio of propylene homopolymer (A) to ethylene copolymer (B) from 95:5 to 60:40, preferably from 90:10 to 61 :39 most preferably from 85:15 to 62:38.
  • Propylene homopolymer (A) and ethylene copolymer (B) together preferably are present in the polyolefin base resin in an amount of at least 80 wt%, more preferably at least 82 wt%, most preferably at least 84 wt% of the total polyolefin base resin.
  • the polyolefin base resin of inventive polymer composition may further comprise an ethylene homopolymer (C) in an amount of up to 15 wt%, based on the total polyolefin base resin, having a density of at least 940 kg/m 3 , preferably of at least 950 kg/m 3 .
  • C ethylene homopolymer
  • Component (C) may consist of a single ethylene homopolymer, but may also comprise a mixture of different ethylene homopolymers. This also applies for all preferred embodiments of component (C).
  • the ethylene homopolymer (C) has a melt flow rate MFR (2.16 kg, 190 0 C) of 0.2 to 200 g/10 min, preferably of 1 to 100 g/10 min, most preferably of 2 to 50 g/10 min.
  • the ethylene homopolymer (C) may be produced by a single- or multistage process polymerization of ethylene such as bulk polymerization, gas phase polymerization, slurry polymerization, solution polymerization or combinations thereof preferably using a conventional catalyst.
  • a homopolymer can be made either in loop reactors or in a combination of loop and gas phase reactor. Those processes are well known to one skilled in the art.
  • a suitable catalyst for the polymerization of the ethylene homopolymer is any catalyst for ethylene polymerization which is capable of polymerizing ethylene at a temperature of 40 to 110 0 C and at a pressure from 10 to 100 bar. Suitable catalysts are Ziegler Natta catalysts as well as metallocene catalysts.
  • Ethylene homopolymer (C) preferably is present in the polyolefin base resin in an amount of up to 15 wt%.
  • the polyolefin base resin of the inventive polymer composition preferably has a melt flow rate MFR (2.16 kg, 230 0 C) of at least 4.5 g/10 min, more preferably of at least 6.0 g/10 min, still more preferably of at least 8.0 g/10 min, most preferably of at least 9.0 g/10 min.
  • the upper limit of the melt flow rate MFR (2.16 kg, 230 0 C) of the polyolefin base resin of the inventive polymer composition is preferably 50 g/10 min, more preferably 25 g/10 min, still more preferably 20 g/10 min, most preferably 18 g/10 min.
  • the polyolefin base resin of the inventive polymer composition does not comprise an ethylene homopolymer (C).
  • the polymer composition preferably has a melt flow rate MFR (2.16 kg, 230°C) of at least 13 g/10 min, preferably of at least 15 g/10 min.
  • the polyolefin base resin of the inventive polymer composition comprises an ethylene homopolymer (C) in an amount of up to 15 wt%, preferably in an amount of 1.0 to 15 wt%, more preferably in an amount of 5.0 to 14 wt%, most preferably in an amount of 7.5 to 13 wt% based on the total of the polyolefin base resin.
  • the polymer composition preferably has a melt flow rate MFR (2.16 kg, 230°C) of less than 13 g/10 min, preferably of not greater than 12 g/10 min. It is preferred that the polyolefin base resin is present in the polymer composition in an amount of at least 75 wt%, most preferably at least 77 wt%.
  • the polymer composition of the invention may comprise at least one filler material (D) in an amount of up to 20 wt% based on the total polymer composition.
  • inventive polymer composition does not comprise a filler material (D).
  • the polymer composition of the invention comprises at least one filler material (D) in an amount of 1 to 18 wt%, more preferably in an amount of 5 to 17 wt%, most preferably in an amount of 10 to 16 wt% based on the total polymer composition.
  • Component (D) preferably is an inorganic filler material.
  • Suitable filler materials are talc, wollastonite, CaCO 3 , BaSO 4 , and mica.
  • component (D) has a particle size d97 (top cut) of 50 micrometer or less, preferably 25 micrometer or less measured by laser diffraction according to ISO 13320-1 :1999. It is further preferred that component D has a specific surface (BET) of at least 5 m 2 /g, preferably at least 9 m 2 /g, determined according to ISO 787-11.
  • the polymer composition of the invention may further contain various additives, such as miscible thermoplastics, antioxidants, UV- stabilizers, lubricants, demolding agents, nucleating agents, fillers, colouring agents, and foaming agents which can be added to the composition before, during or after the blending in an amount of up to 5.0 wt%, preferably up to 3.0 wt% based on the total polymer composition.
  • additives such as miscible thermoplastics, antioxidants, UV- stabilizers, lubricants, demolding agents, nucleating agents, fillers, colouring agents, and foaming agents which can be added to the composition before, during or after the blending in an amount of up to 5.0 wt%, preferably up to 3.0 wt% based on the total polymer composition.
  • the compounds of the several embodiments of the invention are blended together.
  • the blending step can be carried out by any suitable method known in the art, but preferably in a twin screw extruder with high intensity mixing segments and preferably at a temperature of 170 to 270 0 C, more preferably of 180 to 250 0 C, and at a throughput of 10 to 500 kg/h and a screw speed of 50 to 200 rpm.
  • the polymer compositions according to the invention show greatly lower amount of volatiles, fogging and emission.
  • good impact properties such as Charpy notched impact strength especially at low temperatures are achieved whereas the flexural properties in behalf of flexural modulus, flexural strength, flexural strain and flexural stress are not affected.
  • inventive polymer compositions preferably have a content of volatiles of less than 45 micrograms Carbon equivalents/g, more preferably less than 40 micrograms Carbon equivalents /g, most preferably less than 38 micrograms Carbon equivalents /g, determined according to VDA 277.
  • the polymer compositions according to the invention preferably have an amount of volatile organic compounds (VOC) of less than 100 micrograms toluene equivalents / g, more preferably less than 70 micrograms toluene equivalents / g, most preferably less than 50 micrograms toluene equivalents / g, determined according to VDA 278.
  • VOC volatile organic compounds
  • inventive polymer compositions preferably have an amount of fogging of less than 100 micrograms hexadecane equivalents / g, more preferably less than 80 micrograms hexadecane equivalents / g, most preferably less than 60 micrograms hexadecane equivalents / g, determined according to VDA 278.
  • the level of VOC and fogging do not significantly increase after injection molding of the blended and pelletized inventive compositions.
  • the inventive polymer compositions preferably have a Charpy notched impact strength at +23°C of at least 4.0 kJ/m 2 , more preferably at least 5.0 kJ/m 2 , most preferably 5.5 kJ/m 2 , determined according to ISO 179-1eA:2000.
  • inventive polymer compositions preferably have a Charpy notched impact strength at -20 0 C of at least 1.0 kJ/m 2 , more preferably at least 1.2 kJ/m 2 , most preferably 1.5 kJ/m 2 determined according to ISO 179-1eA:2000.
  • inventive polymer compositions preferably have a flexural strength of at least 20 MPa, more preferably of at least 25 MPa determined according to ISO 178.
  • the polymer compositions according to the invention preferably have a flexural modulus of at least 900 MPa, more preferably at least 950 MPa, determined according to ISO 178.
  • inventive polymer compositions can be used for the manufacture of an injection molded article, preferably in automotive applications. Those polymer compositions are especially suitable for automobile interior applications.
  • the present invention is further dedicated to an article comprising such a polymer composition.
  • Such articles are preferably used in automotive applications.
  • an article with a grained surface structure comprising the inventive polymer composition shows a high scratch resistance combined with low gloss.
  • the articles with a grained surface structure are preferably produced by moulding, more preferably by injection moulding and have an average grain size of preferably 0.01 to 5 mm, more preferably 0.05 to 2.5 mm, a grain depth of preferably 0.01 to 0.5 mm, more preferably 0.05 to 0.25 mm and a conicity of preferably 1 ° to 10°, more preferably 3° to 8°. It is further preferred that those articles with a grained surface structure comprise carbon black in an amount of up to 5 wt%, more preferably in an amount of 0.1 to 3 wt%.
  • the article with a grained surface structure, preferably as defined above, comprising the polymer composition according to the invention has a scratch resistance, determined as the difference of the luminance ⁇ L at a load of 10 N of not more than 1 , preferably not more than 0.7, still more preferably not more than 0.5, most preferably not more than 0.3.
  • the lower limit of the scratch resistance usually is -0.5.
  • the article with a grained surface structure comprising the polymer composition according to the invention has a gloss at an angle of 60° of not more than 2.8%, preferably of not more than 2.7% and most preferably of not more than 2.6%.
  • the lower limit of the gloss usually is 0%.
  • the article with a grained surface structure consists of the inventive polymer composition.
  • the present invention is further dedicated to the use of a polymer composition for the production of an article with a grained surface, preferably as defined above, having a scratch resistance, determined as the difference of the luminance ⁇ L at a load of 10 N, of not more than 1 preferably not more than 0.7, still more preferably not more than 0.5, most preferably not more than 0.3 and a gloss at an angle of 60° of not more than 2.8%, preferably of not more than 2.7% and most preferably of not more than 2.6%.
  • a polymer composition for the production of an article with a grained surface typically in automotive applications having such superior scratch resistance and gloss behavior is produced.
  • Preferred polymer compositions in this regard are those of the present invention. In the following the present invention is further illustrated by means of examples.
  • the melt flow rate is determined according to ISO 1133 and is indicated in g/10 min.
  • the MFR is an indication of the flowability, and hence the processability, of the polymer. The higher the melt flow rate, the lower the viscosity of the polymer.
  • the MFR 2 of polypropylene is determined at a temperature of 230 0 C and a load of 2.16 kg
  • the MFR 5 of polyethylene is measured at a temperature 190 0 C and a load of 5 kg
  • the MFR 2 of polyethylene at a temperature 190 0 C and a load of 2.16 kg.
  • the density is measured according to ISO 1183 on compression molded specimens.
  • a Waters Alliance GPCV 2000 instrument equipped with refractive index detector and online viscosimeter was used with 3 x TSK-gel columns (GMHXL-HT) from TosoHaas and 1 ,2,4-trichlorobenzene (TCB, stabilized with 200 mg/L 2,6-Di tert butyl-4-methyl-phenol) as solvent at 145 0 C and at a constant flow rate of 1 ml/min.
  • sample solution 216.5 ⁇ l were injected per analysis.
  • the column set was calibrated using relative calibration with 19 narrow MWD polystyrene (PS) standards in the range of 0.5 kg/mol to 11 500 kg/mol and a set of well characterized broad polypropylene standards. All samples were prepared by dissolving 5 - 10 mg of polymer in 10 ml (at 160 0 C) of stabilized TCB (same as mobile phase) and keeping for 3 hours with continuous shaking prior sampling in into the GPC instrument.
  • PS polystyrene
  • DSC is run according to ISO 3146 / part 3 /method C2 in a heat / cool / heat cycle with a scan rate of 10 °C/min in the temperature range of +23 to +210 0 C. Crystallization temperature and enthalpy are determined from the cooling step, while melting temperature and enthalpy are determined from the second heating step.
  • the solution from the first 100 ml vessel is evaporated in nitrogen flow and the residue is dried under vacuum at 90 0 C until constant weight is reached.
  • the particle size d97 (top cut) is calculated from the particle size distribution measured by laser diffraction according to ISO 13320-1 :1999.
  • the specific surface (BET) is determined according to ISO 787-11.
  • Charpy impact strength was determined according to ISO 179-1eA:2000 on V-notched samples of 80x10x4 mm 3 at 23 0 C (Charpy notched impact strength (23 0 C)), and -20 0 C (Charpy notched impact strength (-20 0 C)).
  • the test specimens were prepared by injection molding using an IM V 60 TECH machinery in line with ISO 1872-2. The melt temperature was 200 0 C and the mold temperature was 40 0 C.
  • the flexural modulus and flexural strength, strain and stress were determined according to ISO 178.
  • the test specimens having a dimension of 80 x 10 x 4.0 mm 3 (length x width x thickness) were prepared by injection molding according to EN ISO 1873-2.
  • the length of the span between the supports was 64 mm, the test speed was 2 mm/min and the force was 100 N.
  • the content of volatiles is determined according to VDA 277:1995 using a gas chromatography (GC) device with a WCOT-capillary column (wax type with 0.25 ⁇ film thickness) of 0.25 mm inner diameter and 30 m length.
  • the GC settings were as follows: 3 minutes isothermal at 50 0 C, heat up to 200 °C at 12 K/min, 4 minutes isothermal at 200 °C, injection- temperature: 200 0 C, detection-temperature: 250 0 C, carrier helium, flow- mode split 1 :20 and average carrier-speed 22 - 27 cm/s.
  • VOC/Fog emission is measured according to VDA 278:2002 on injection molded test specimen and on the granulated compounds.
  • the volatile organic compounds are measured in toluene equivalents per gram.
  • the fogging is measured in hexadecane equivalents per gram.
  • the measurements were carried out with a TDSA supplied by Gerstel using helium 5.0 as carrier gas and a column HP Ultra 2 of 50 m length and 0.32 mm diameter and 0.52 ⁇ m coating of 5 % Phenyl-Methyl- Siloxane.
  • the VOC-Analysis is done according to device setting 1 listed in the standard using following main parameters: flow mode splitless, final temperature 90 0 C; final time 30 min, rate 60K/min.
  • the cooling trap was purged with a flow-mode split 1 :30 in a temperature range from -150 0 C to + 280 0 C with a heating rate of 12 K/sec and a final time of 5 min.
  • the following GC settings were used for analysis: 2 min isothermal at 40 0 C. heating at 3 K/min up to 92 0 C, then at 5 K/min up to 160 0 C, and then at 10 K/min up to 280 0 C, 10 minutes isothermal; flow 1.3 ml/min.
  • the fog analysis is done according to device setting 1 listed in the standard using following main parameters: flow-mode splitless, rate 60 K/min; final temperature 120 0 C; final time 60 min.
  • the cooling trap was purged with a flow-mode split 1 :30 in a temperature range from -150 0 C to + 280 0 C with a heating rate of 12 K/sec.
  • the following GC-settings were used for analysis: isothermal at 50 0 C for 2 min, heating at 25 K/min up to 160 0 C, then at 10 K/min up to 280 0 C, 30 minutes isothermal; flow 1.3 ml/min. k) Scratch resistance
  • a minimum of 20 scratches parallel to each other are brought up at a load of 10 N with a distance of 2 mm.
  • the application of the scratches is repeated perpendicular to each other, so that the result is a scratching screen.
  • the scratching direction shall be unidirectional.
  • the scratch resistance is reported as the difference of the luminance ⁇ L of the unscratched from the scratched areas. ⁇ L can be measured using a spectrophotometer that fulfils the requirements to DIN 5033.
  • Measured ⁇ L values must be below a maximum of 1.5.
  • a metallocene catalyst as described in example 1 of EP 1741725 A1 was used for the preparation of the PP homopolymer PP-A-1.
  • the PP homopolymer PP-A-1 has been produced in a Borstar PP pilot plant as follows: The catalyst was fed together with triethylaluminium as cocatalyst with a Al/Zr ratio [mol/mol] of 911.
  • the first polymerization step was carried out in a loop reactor at a temperature of 35°C and a pressure of 5470 kPa feeding propylene with 200 ppm of hydrogen.
  • the resulting polymer was transferred without special separation from the process gas to the subsequent reactors.
  • a second polymerization step was carried out in a gas phase reactor at a temperature of 65°C and a pressure of 5290 kPa, respectively feeding further propylene with 200 ppm hydrogen.
  • the resulting polypropylene homopolymer was compounded together with 0.07 wt% Calcium Stearate and 0.60 % Irganox B225 (antioxidant combination supplied by Ciba Specialty Chemicals) in a twin screw extruder at 230 to 250 0 C.
  • the resulting PP homopolymer has an MFR (2.16 kg, 230 0 C) of 7.1 g/10 min, a density of 902 kg/m 3 , a melting point of 150 0 C and an XS content of 0.7 wt%.
  • the GPC determination resulted in a weight average molecular weight (Mw) of 260 kg/mol, a number average molecular weight (Mn) of 105 kg/mol and a MWD (Mw/Mn) of 2.5.
  • Mw weight average molecular weight
  • Mn number average molecular weight
  • MWD MWD
  • HD905CF is a Ziegler-Natta based propylene homopolymer with a density of 905 kg/m 3 , an MFR (2.16 kg, 230 0 C) of 8 g/10 min, a melting point of 166°C and an XS content of 1.2 wt%. It is distributed by Borealis.
  • EXACT ® 8230 is a metallocene-based ethylene-octene copolymer with a density of 880 kg/m 3 and an MFR (2.16 kg, 190 0 C) of 30 g/10 min. It is distributed by DEX Plastomers.
  • MG9641 B is an ethylene homopolymer with a density of 964 kg/m 3 and an MFR (2.16 kg, 190°C) of 8 g/10 min. It is distributed by Borealis.
  • HC001A is a propylene hompolymer with a density of 905 kg/m 3 and an MFR (2.16 kg, 230°C) of 3.2 g/10 min. It is distributed by Borealis.
  • Tital ® 15 is a talc filler material with a particle size d97 (top cut) of 21 ⁇ m and a specific surface (BET) of 10 m 2 /g, distributed by Ankerpoort NV.
  • Irganox 1010 (Cas No. 6683-19-8) and lrgafos 168 (Cas No. 31570-04-4) both are distributed by Ciba Specialty Chemicals.
  • Tinuvin 770 (Cas No. 52829-07-9) and Chimassorb 119 (Cas No. 106990- 43-6) both are distributed by Ciba Specialty Chemicals. i) Carbon Black (CB)
  • PLASBLAK PE4103 is a polyethylene based masterbatch for injection molding applications containing carbon black. It is distributed by Cabot Corporation.
  • lncroslip C is used as erucamide (Cas No. 112-84-5), distributed by Croda Chemical.
  • the components were blended according to Tables 1 and 2 in a twin screw extruder (PRISM TSE24 L/D ratio 40) with two high intensity mixing segments at temperatures between 190 and 240 0 C at a throughput of 10 kg/h and a screw speed of 50 rpm.
  • the material was extruded to two circular dies of 3 mm diameter into a water bath for strand solidification and then pelletized and dried.
  • Table 2 Polymer compositions containing PP-A-2 The polymer compositions were tested on the level of volatiles and emissions as well as on their mechanical properties which are listed in Table 3.
  • inventive examples show excellently low emissions and volatiles. It can further be seen that injection molding of the inventive polymer compositions does not increase the amount of volatile organic compounds and the amount of fogging.
  • the injection molded test specimens with a grained surface structure prepared from the inventive polymer compositions according to item (k) in the method section show low gloss indicating a matt surface while maintaining a high scratch resistance as shown in Table 3.
  • polyolefin base resin has a weight ratio of propylene homopolymer (A) to ethylene copolymer (B) from 95:5 to 60:40.
  • component (A) has an weight average molecular weight Mw of 100 to 500 kg/mol, measured by GPC according to ISO 16014-1 , and -4.
  • component (A) has a MFR (2.16 kg, 230 0 C) of 2 to 200 g/10 min, measured according to ISO 1133.
  • component (A) has a melting point as determined by differential scanning calorimetry (DSC) of not more than 160 0 C.
  • component (A) has an amount of xylene cold solubles (XS) of not more than 2.0 wt%. 7. Polymer composition according to any of the preceding clauses wherein component (A) has been polymerized in the presence of a single-site catalyst.
  • XS xylene cold solubles
  • component (B) has an weight average molecular weight Mw of 40 to 160 kg/mol, measured by GPC according to ISO 16014-1 , and -4.
  • component (B) has a MWD of 1.5 to 5.0.
  • component (B) has a MFR (2.16 kg, 190 0 C) of at least 5.0 g/10 min, measured according to ISO 1133.
  • component (B) has a comonomer content of 5 to 40 wt% based on the total component (B).
  • polyolefin base resin further comprises an ethylene homopolymer (C) having a density of at least 940 kg/m 3 in an amount of up to 15 wt% based on the total polyolefin base resin.
  • component (C) has a MFR (2.16 kg, 190 0 C) of 0.2 to 200 g/10 min, measured according to ISO 1133.
  • composition according to any of the preceding clauses wherein the composition further comprises at least one filler material (D) in an amount of up to 20 wt%.
  • component (D) is an inorganic filler material.
  • component (D) is selected from talc, wollastonite, CaCO3, BaSO 4 and mica.
  • component (D) has a particle size d97 (top cut) of 50 micrometer or less, measured by laser diffraction according to ISO 13320-1 :1999.
  • polystyrene resin according to any of the preceding clauses wherein the polyolefin composition has an amount of volatile organic compounds of less than 100 micrograms toluene equivalents / g, measured according to VDA 278.
  • polystyrene resin according to any of the preceding clauses wherein the polyolefin composition has an amount of fogging of less than 100 micrograms hexadecane equivalents / g, measured according to VDA 278.

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Abstract

The present invention relates to a polymer composition comprising a polyolefin base resin comprising (A) a propylene homopolymer with a MWD of 1.5 to 5.0, and (B) an ethylene copolymer with one or more comonomers selected from alpha-olefins with 4 to 12 carbon atoms, having a density of not greater than 920 kg/m3 wherein the polyolefin base resin has a weight ratio of propylene homopolymer (A) to ethylene copolymer (B) from 95:5 to 60:40, the use of such a polymer composition for the manufacture of an injection molded article, an article produced from such a polymer composition, an article with a grained surface structure produced from such a polymer composition showing having a scratch resistance, determined as the difference of the luminance ΔL at a load of 10 N, of not more than 1 and a gloss at an angle of 60° of not more than 2.8%, and the use of a polymer composition for the production of such an article.

Description

Low emission polymer composition
The present invention relates to a polymer composition with low amounts of volatiles and fogging and good mechanical properties comprising a propylene homopolymer, an ethylene copolymer with one or more comonomers selected from alpha-olefins with 4 to 12 carbon atoms, and optionally an ethylene homopolymer. The present invention further relates to a process for preparing such a polymer composition and the use of such a polymer composition for preparing injection molded articles e.g. in automotive applications.
Due to their chemical and thermal resistance as well as mechanical strength polypropylenes are used in different applications such as molding applications, films, wires and cables or pipes. However, due to their high mechanical strength polypropylenes show a high stiffness which is not advantageous for the use as material for injection molded automotive applications.
It is known in the art to incorporate ethylene-propylene rubbers and ethylene propylene diene monomer rubbers in polypropylene compositions as impact modifiers. For impact modification also single-site based ethylene copolymers are used. EP 1 373 403 discloses a heterophasic propylene polymer comprising 60 to 90 wt% of a propylene homopolymer and 10 to 25 wt% of a single-site based ethylene copolymer. Further, Huneault et al., Effect of compounding conditions and compositions on the performance of talc/ethylene-octene copolymer/polypropylene blends (TPO), Proc. SPE ANTEC 1998 Vol. 1 , 7-11 describes the use of a metallocene-based ethylene-octene copolymer as an inpact modifier for talc filled polypropylene. Talc filled polypropylene is widely used in automobile and appliance applications. These composites have good surface quality, low shrinkage, high stiffness, good tensile properties and creep resistance.
Further key issues in automotive applications are low emissions as well as low amounts of volatile organic compounds (VOC) and fogging. Those VOCs are supposed to be produced during the extrusion or compounding step. Reducing emissions from the polymeric material applied in automobile interior is a general target for several years. This target has been pursued by applying purification steps in the production of the respective polymeric material (e.g. steam stripping, vacuum degassing and low input compounding) or by using special additives (e.g. high performance stabilizers and absorbers). Examples for such processes are disclosed in EP 1364760 A1 and EP 1535718 A1. These processes involve, however, increased investment cost and reduced output rates, deteriorating the economic situation of the resulting products.
Further important properties for material used in automotive interior application are scratch resistance and gloss. For improving scratch resistance EP 1 788 022 suggests to blend a propylene containing an ethylene-propylene copolymer with a very low intrinsic viscosity with a polypropylene having a density between 905 and 930 kg/m3. However, those materials have a glossy surface which is not appreciated by automobile designers.
It is hence object of the present application to provide a polymer composition having good mechanical properties, in particular impact strength at low temperatures and flexural properties and at the same time showing greatly reduced amounts of volatiles, fogging and emissions without the need to use special compounding equipment and/or additives during the preparation of those compositions. Additionally, articles comprising the polymer composition should have a good scratch resistance combined with a low gloss. The present invention resides in the finding that emissions and volatiles can be greatly diminished by using a propylene homopolymer with a MWD of 1.5 to 5.0. In order to achieve good mechanical properties, the propylene homopolymer is blended with an ethylene copolymer having a density of not greater than 920 kg/m3 as impact modifier. It has surprisingly been found that such compositions show good impact and stiffness properties together with low levels of volatiles and emissions of the granulated compositions as well as of injection molded test specimen. Furthermore, the injection molded test specimen with a grained surface structure comprising such compositions show an improved scratch resistance to gloss balance.
The present invention therefore relates to a polymer composition comprising a polyolefin base resin comprising
(A) a propylene homopolymer with a MWD of 1.5 to 5.0, and
(B) an ethylene copolymer with one or more comonomers selected from alpha-olefins with 4 to 12 carbon atoms, having a density of not greater than 920 kg/m3,
wherein the polyolefin base resin has a weight ratio of propylene homopolymer (A) to ethylene copolymer (B) from 95:5 to 60:40.
It has surprisingly be found that such a polymer composition shows low levels of emissions and volatiles, which can be seen in low emission and low amounts of VOC and fogging of the granulated compounds and the injection molded articles made from those compounds. At the same time good impact properties especially at low temperatures are achieved whereas the flexural properties are not affected negatively. Additionally, the optical properties in form of low gloss of the articles with a grained surface structure comprising the polymer composition of the present invention could have surprisingly been optimized by maintaining a excellent scratch resistance. Component (A) may consist of a single propylene homopolymer, but may also comprise a mixture of different propylene homopolymers. This also applies for all preferred embodiments of component (A).
The same applies for component (B), i.e. it may consist of a single ethylene copolymer but may also comprise a mixture of different ethylene copolymers. This also applies for all preferred embodiments of component (B).
In one preferred embodiment, the polyolefin base resin consists of components (A) and (B).
Propylene homopolymer (A) preferably is present in an amount of 60 to 95 wt%, more preferably 61 to 90 wt%, most preferably 62 to 85 wt% based on the total polyolefin base resin.
It is preferred that component (A) has a weight average molecular weight Mw of 100 to 500 kg/mol, more preferably 150 to 350 kg/mol, and a number average molecular weight Mn of 20 to 200 kg/mol, more preferably 50 to 150 kg/mol, determined by GPC according to ISO 16014- 1 , and -4.
Component (A) has a MWD of 1.5 to 5.0, preferably 2.0 to 4.0, most preferably 2.2 to 3.5.
It is further preferred that propylene homopolymer (A) has a melt flow rate MFR (2.16 kg, 2300C) of 2 to 200 g/10 min, more preferably of 5 to 50 g/10 min.
The MFR (2.16 kg, 2300C) for polypropylene and the MFR (2.16 kg, 1900C) for polyethylene is determined according to ISO 1133. Melt flow rate and average molecular weight are inversely related to each other, i.e. higher melt flow rate is equivalent to lower average molecular weight and vice versa. Further, the higher the melt flow rate, the lower the viscosity of the polymeric material. It is especially preferred that the propylene homopolymer (A) has an amount of xylene cold solubles (XS) of not more than 2.0 wt%, preferably not more than 1.0 wt%.
It is furthermore especially preferred that the propylene homopolymer (A) has a melting point as determined by differential scanning calorimetry (DSC) of not more than 1600C, preferably not more than 155°C.
The propylene homopolymer (A) may be produced by a single- or multistage process polymerization of propylene such as bulk polymerization, gas phase polymerization, slurry polymerization, solution polymerization or combinations thereof preferably using a single site catalyst. A homopolymer can be made either in loop reactors or in a combination of loop and gas phase reactor. Those processes are well known to one skilled in the art.
A suitable catalyst for the polymerization of the propylene homopolymer is any stereospecific single-site catalyst for propylene polymerization which is capable of polymerizing propylene at a temperature of 40 to 1100C and at a pressure from 10 to 100 bar. Suitable single-site catalysts are metallocene catalysts as described for example in EP 1741725 A1 and EP 0943631 A1.
The ethylene copolymer (B) preferably is present in an amount of 5 to 40 wt%, more preferably in an amount of 10 to 39 wt%, most preferably in an amount of 15 to 38 wt% based on the total polyolefin base resin.
Further, ethylene copolymer (B) has a density of not greater than 920 kg/m3, preferably not greater than 905 kg/m3, most preferably not greater than 895 kg/m3.
It is further preferred that the density of component (B) is at least 865 kg/m3, more preferably 870 kg/m3, most preferably 875 kg/m3. It is preferred that component (B) has a weight average molecular weight Mw of 40 to 160 kg/mol, more preferably 60 to 120 kg/mol, and a number average molecular weight Mn of 10 to 80 kg/mol, more preferably 15 to 70 kg/mol, determined by GPC according to ISO 16014-1 , and -4.
The ethylene copolymer (B) preferably has a MWD of 1.5 to 5.0, more preferably 2.0 to 4.0, most preferably 2.2 to 3.5.
It is further preferred that ethylene copolymer (B) has a melt flow rate MFR (2.16 kg, 1900C) of at least 5.0 g/10 min, more preferably of at least 10.0 g/10 min.
Further, the melt flow rate MFR (2.16 kg, 1900C) of component (B) is preferably not higher than 100 g/10 min, more preferably not higher than 50 g/10 min.
In a preferred embodiment, ethylene copolymer (B) has a comonomer content of 5 to 40 wt%, more preferably 7.5 to 30 wt%, most preferably 10 to 25 wt%, based on the total component (B).
The comonomers of component (B) are selected from alpha-olefins with 4 to 12 carbon atoms, preferably from a group consisting of 1-butene, 1- hexene, 4-methyl-1-pentene and 1-octene. Especially preferred are 1- hexene and 1-octene.
The ethylene copolymer (B) may be produced by a single- or multistage process polymerization of ethylene and alpha-olefins such as bulk polymerization, gas phase polymerization, slurry polymerization, solution polymerization or combinations thereof preferably using a single site catalyst. A copolymer can be made either in loop reactors or in a combination of loop and gas phase reactor. Those processes are well known to one skilled in the art.
A suitable catalyst for the polymerization of the ethylene homopolymer is any single-site catalyst for ethylene polymerisation which is capable of copolymerizing ethylene and comonomers at a temperature of 40 to 1100C and at a pressure from 10 to 100 bar. Suitable single-site catalysts are metallocene catalysts as described for example in EP 1646668 A1 and EP 1292626 A1.
The polyolefin base resin according to the present invention has a weight ratio of propylene homopolymer (A) to ethylene copolymer (B) from 95:5 to 60:40, preferably from 90:10 to 61 :39 most preferably from 85:15 to 62:38.
Propylene homopolymer (A) and ethylene copolymer (B) together preferably are present in the polyolefin base resin in an amount of at least 80 wt%, more preferably at least 82 wt%, most preferably at least 84 wt% of the total polyolefin base resin.
The polyolefin base resin of inventive polymer composition may further comprise an ethylene homopolymer (C) in an amount of up to 15 wt%, based on the total polyolefin base resin, having a density of at least 940 kg/m3, preferably of at least 950 kg/m3.
Component (C) may consist of a single ethylene homopolymer, but may also comprise a mixture of different ethylene homopolymers. This also applies for all preferred embodiments of component (C).
It is preferred that the ethylene homopolymer (C) has a melt flow rate MFR (2.16 kg, 1900C) of 0.2 to 200 g/10 min, preferably of 1 to 100 g/10 min, most preferably of 2 to 50 g/10 min.
The ethylene homopolymer (C) may be produced by a single- or multistage process polymerization of ethylene such as bulk polymerization, gas phase polymerization, slurry polymerization, solution polymerization or combinations thereof preferably using a conventional catalyst. A homopolymer can be made either in loop reactors or in a combination of loop and gas phase reactor. Those processes are well known to one skilled in the art. A suitable catalyst for the polymerization of the ethylene homopolymer is any catalyst for ethylene polymerization which is capable of polymerizing ethylene at a temperature of 40 to 1100C and at a pressure from 10 to 100 bar. Suitable catalysts are Ziegler Natta catalysts as well as metallocene catalysts.
Ethylene homopolymer (C) preferably is present in the polyolefin base resin in an amount of up to 15 wt%.
The polyolefin base resin of the inventive polymer composition preferably has a melt flow rate MFR (2.16 kg, 2300C) of at least 4.5 g/10 min, more preferably of at least 6.0 g/10 min, still more preferably of at least 8.0 g/10 min, most preferably of at least 9.0 g/10 min.
The upper limit of the melt flow rate MFR (2.16 kg, 2300C) of the polyolefin base resin of the inventive polymer composition is preferably 50 g/10 min, more preferably 25 g/10 min, still more preferably 20 g/10 min, most preferably 18 g/10 min.
In one preferred embodiment the polyolefin base resin of the inventive polymer composition does not comprise an ethylene homopolymer (C). In this embodiment the polymer composition preferably has a melt flow rate MFR (2.16 kg, 230°C) of at least 13 g/10 min, preferably of at least 15 g/10 min.
In another preferred embodiment the polyolefin base resin of the inventive polymer composition comprises an ethylene homopolymer (C) in an amount of up to 15 wt%, preferably in an amount of 1.0 to 15 wt%, more preferably in an amount of 5.0 to 14 wt%, most preferably in an amount of 7.5 to 13 wt% based on the total of the polyolefin base resin. In this embodiment the polymer composition preferably has a melt flow rate MFR (2.16 kg, 230°C) of less than 13 g/10 min, preferably of not greater than 12 g/10 min. It is preferred that the polyolefin base resin is present in the polymer composition in an amount of at least 75 wt%, most preferably at least 77 wt%.
In all preferred embodiments the polymer composition of the invention may comprise at least one filler material (D) in an amount of up to 20 wt% based on the total polymer composition.
In one preferred embodiment the inventive polymer composition does not comprise a filler material (D).
In another preferred embodiment the polymer composition of the invention comprises at least one filler material (D) in an amount of 1 to 18 wt%, more preferably in an amount of 5 to 17 wt%, most preferably in an amount of 10 to 16 wt% based on the total polymer composition.
Component (D) preferably is an inorganic filler material. Suitable filler materials are talc, wollastonite, CaCO3, BaSO4, and mica.
It is preferred that component (D) has a particle size d97 (top cut) of 50 micrometer or less, preferably 25 micrometer or less measured by laser diffraction according to ISO 13320-1 :1999. It is further preferred that component D has a specific surface (BET) of at least 5 m2/g, preferably at least 9 m2/g, determined according to ISO 787-11.
Moreover, the polymer composition of the invention may further contain various additives, such as miscible thermoplastics, antioxidants, UV- stabilizers, lubricants, demolding agents, nucleating agents, fillers, colouring agents, and foaming agents which can be added to the composition before, during or after the blending in an amount of up to 5.0 wt%, preferably up to 3.0 wt% based on the total polymer composition.
The compounds of the several embodiments of the invention are blended together. The blending step can be carried out by any suitable method known in the art, but preferably in a twin screw extruder with high intensity mixing segments and preferably at a temperature of 170 to 270 0C, more preferably of 180 to 250 0C, and at a throughput of 10 to 500 kg/h and a screw speed of 50 to 200 rpm.
It will be shown in the example section below that the polymer compositions according to the invention show greatly lower amount of volatiles, fogging and emission. At the same time good impact properties such as Charpy notched impact strength especially at low temperatures are achieved whereas the flexural properties in behalf of flexural modulus, flexural strength, flexural strain and flexural stress are not affected.
Thus, the inventive polymer compositions preferably have a content of volatiles of less than 45 micrograms Carbon equivalents/g, more preferably less than 40 micrograms Carbon equivalents /g, most preferably less than 38 micrograms Carbon equivalents /g, determined according to VDA 277.
Further, the polymer compositions according to the invention preferably have an amount of volatile organic compounds (VOC) of less than 100 micrograms toluene equivalents / g, more preferably less than 70 micrograms toluene equivalents / g, most preferably less than 50 micrograms toluene equivalents / g, determined according to VDA 278.
Additionally, the inventive polymer compositions preferably have an amount of fogging of less than 100 micrograms hexadecane equivalents / g, more preferably less than 80 micrograms hexadecane equivalents / g, most preferably less than 60 micrograms hexadecane equivalents / g, determined according to VDA 278.
It is preferred that the level of VOC and fogging do not significantly increase after injection molding of the blended and pelletized inventive compositions. Further, the inventive polymer compositions preferably have a Charpy notched impact strength at +23°C of at least 4.0 kJ/m2, more preferably at least 5.0 kJ/m2, most preferably 5.5 kJ/m2, determined according to ISO 179-1eA:2000.
Additionally, the inventive polymer compositions preferably have a Charpy notched impact strength at -200C of at least 1.0 kJ/m2, more preferably at least 1.2 kJ/m2, most preferably 1.5 kJ/m2 determined according to ISO 179-1eA:2000.
Moreover, the inventive polymer compositions preferably have a flexural strength of at least 20 MPa, more preferably of at least 25 MPa determined according to ISO 178.
Still further, the polymer compositions according to the invention preferably have a flexural modulus of at least 900 MPa, more preferably at least 950 MPa, determined according to ISO 178.
In a further aspect of the present invention the inventive polymer compositions can be used for the manufacture of an injection molded article, preferably in automotive applications. Those polymer compositions are especially suitable for automobile interior applications.
The present invention is further dedicated to an article comprising such a polymer composition. Such articles are preferably used in automotive applications.
Additionally, it has surprisingly been found that an article with a grained surface structure comprising the inventive polymer composition shows a high scratch resistance combined with low gloss.
The articles with a grained surface structure are preferably produced by moulding, more preferably by injection moulding and have an average grain size of preferably 0.01 to 5 mm, more preferably 0.05 to 2.5 mm, a grain depth of preferably 0.01 to 0.5 mm, more preferably 0.05 to 0.25 mm and a conicity of preferably 1 ° to 10°, more preferably 3° to 8°. It is further preferred that those articles with a grained surface structure comprise carbon black in an amount of up to 5 wt%, more preferably in an amount of 0.1 to 3 wt%.
The article with a grained surface structure, preferably as defined above, comprising the polymer composition according to the invention has a scratch resistance, determined as the difference of the luminance ΔL at a load of 10 N of not more than 1 , preferably not more than 0.7, still more preferably not more than 0.5, most preferably not more than 0.3. The lower limit of the scratch resistance usually is -0.5.
At the same time the article with a grained surface structure comprising the polymer composition according to the invention has a gloss at an angle of 60° of not more than 2.8%, preferably of not more than 2.7% and most preferably of not more than 2.6%. The lower limit of the gloss usually is 0%.
In a preferred embodiment the article with a grained surface structure consists of the inventive polymer composition.
Thus, the present invention is further dedicated to the use of a polymer composition for the production of an article with a grained surface, preferably as defined above, having a scratch resistance, determined as the difference of the luminance ΔL at a load of 10 N, of not more than 1 preferably not more than 0.7, still more preferably not more than 0.5, most preferably not more than 0.3 and a gloss at an angle of 60° of not more than 2.8%, preferably of not more than 2.7% and most preferably of not more than 2.6%. In a preferred embodiment an injection molded article with a grained surface, typically in automotive applications having such superior scratch resistance and gloss behavior is produced. Preferred polymer compositions in this regard are those of the present invention. In the following the present invention is further illustrated by means of examples.
Examples:
1. Definitions:
a) Melt Flow Rate
The melt flow rate (MFR) is determined according to ISO 1133 and is indicated in g/10 min. The MFR is an indication of the flowability, and hence the processability, of the polymer. The higher the melt flow rate, the lower the viscosity of the polymer. The MFR2 of polypropylene is determined at a temperature of 230 0C and a load of 2.16 kg, the MFR5 of polyethylene is measured at a temperature 190 0C and a load of 5 kg and the MFR2 of polyethylene at a temperature 190 0C and a load of 2.16 kg.
b) Density
The density is measured according to ISO 1183 on compression molded specimens.
c) Weight Average Molecular Weight and MWD
The weight average molecular weight Mw and the molecular weight distribution (MWD = Mw/Mn wherein Mn is the number average molecular weight and Mw is the weight average molecular weight) is measured by a method based on ISO 16014-1 :2003 and ISO 16014-4:2003. A Waters Alliance GPCV 2000 instrument, equipped with refractive index detector and online viscosimeter was used with 3 x TSK-gel columns (GMHXL-HT) from TosoHaas and 1 ,2,4-trichlorobenzene (TCB, stabilized with 200 mg/L 2,6-Di tert butyl-4-methyl-phenol) as solvent at 145 0C and at a constant flow rate of 1 ml/min. 216.5 μl of sample solution were injected per analysis. The column set was calibrated using relative calibration with 19 narrow MWD polystyrene (PS) standards in the range of 0.5 kg/mol to 11 500 kg/mol and a set of well characterized broad polypropylene standards. All samples were prepared by dissolving 5 - 10 mg of polymer in 10 ml (at 160 0C) of stabilized TCB (same as mobile phase) and keeping for 3 hours with continuous shaking prior sampling in into the GPC instrument.
In case of PP the constants are: K: 19 x10"3 ml/g and a: 0.725
In case of PE the constants are: K: 39 x10'3 ml/g and a: 0.725
d) Differential Scanning Calorimetry (DSC)
DSC is run according to ISO 3146 / part 3 /method C2 in a heat / cool / heat cycle with a scan rate of 10 °C/min in the temperature range of +23 to +2100C. Crystallization temperature and enthalpy are determined from the cooling step, while melting temperature and enthalpy are determined from the second heating step.
e) Determination of xylene soluble fraction (XS)
2.0 g of polymer is dissolved in 250 ml p-xylene at 135 0C under agitation. After 30 minutes the solution is allowed to cool for 15 minutes at ambient temperature and then allowed to settle for 30 minutes at 25 0C. The solution is filtered with filter paper into two 100 ml flasks.
The solution from the first 100 ml vessel is evaporated in nitrogen flow and the residue is dried under vacuum at 90 0C until constant weight is reached.
XS% = (100χmχVo)/(moχv); mo = initial polymer amount (g); m = weight of residue (g); Vo = initial volume (ml); v = volume of analysed sample (ml). f) Particle size (d97) and specific surface (BET)
The particle size d97 (top cut) is calculated from the particle size distribution measured by laser diffraction according to ISO 13320-1 :1999. The specific surface (BET) is determined according to ISO 787-11.
g) Charpy Notched Impact Strength
Charpy impact strength was determined according to ISO 179-1eA:2000 on V-notched samples of 80x10x4 mm3 at 23 0C (Charpy notched impact strength (230C)), and -20 0C (Charpy notched impact strength (-200C)). The test specimens were prepared by injection molding using an IM V 60 TECH machinery in line with ISO 1872-2. The melt temperature was 200 0C and the mold temperature was 40 0C.
h) Flexural Modulus and Flexural Strength
The flexural modulus and flexural strength, strain and stress were determined according to ISO 178. The test specimens having a dimension of 80 x 10 x 4.0 mm3 (length x width x thickness) were prepared by injection molding according to EN ISO 1873-2. The length of the span between the supports was 64 mm, the test speed was 2 mm/min and the force was 100 N.
i) Emission of volatiles
The content of volatiles is determined according to VDA 277:1995 using a gas chromatography (GC) device with a WCOT-capillary column (wax type with 0.25 μ film thickness) of 0.25 mm inner diameter and 30 m length. The GC settings were as follows: 3 minutes isothermal at 50 0C, heat up to 200 °C at 12 K/min, 4 minutes isothermal at 200 °C, injection- temperature: 2000C, detection-temperature: 250 0C, carrier helium, flow- mode split 1 :20 and average carrier-speed 22 - 27 cm/s. j) VOC/Fog emission
The VOC/Fog emission is measured according to VDA 278:2002 on injection molded test specimen and on the granulated compounds. The volatile organic compounds are measured in toluene equivalents per gram. The fogging is measured in hexadecane equivalents per gram.
The measurements were carried out with a TDSA supplied by Gerstel using helium 5.0 as carrier gas and a column HP Ultra 2 of 50 m length and 0.32 mm diameter and 0.52 μm coating of 5 % Phenyl-Methyl- Siloxane.
The VOC-Analysis is done according to device setting 1 listed in the standard using following main parameters: flow mode splitless, final temperature 90 0C; final time 30 min, rate 60K/min. The cooling trap was purged with a flow-mode split 1 :30 in a temperature range from -150 0C to + 280 0C with a heating rate of 12 K/sec and a final time of 5 min. The following GC settings were used for analysis: 2 min isothermal at 40 0C. heating at 3 K/min up to 92 0C, then at 5 K/min up to 160 0C, and then at 10 K/min up to 280 0C, 10 minutes isothermal; flow 1.3 ml/min.
The fog analysis is done according to device setting 1 listed in the standard using following main parameters: flow-mode splitless, rate 60 K/min; final temperature 120 0C; final time 60 min. The cooling trap was purged with a flow-mode split 1 :30 in a temperature range from -150 0C to + 280 0C with a heating rate of 12 K/sec. The following GC-settings were used for analysis: isothermal at 50 0C for 2 min, heating at 25 K/min up to 160 0C, then at 10 K/min up to 280 0C, 30 minutes isothermal; flow 1.3 ml/min. k) Scratch resistance
To determine the scratch resistance a Cross Hatch Cutter Model 42Op, manufactured by Erichsen, was used.
For the tests, plaques of 70x70x4 mm size were cut from a molded grained plaque of size 140x200x4 mm (grain parameters average grain size = 1 mm, grain depth = 0.12 mm, conicity = 6°). The minimum period between injection molding of specimens and scratch-testing was 7 days.
For testing the specimens must be clamped in a suitable apparatus as described above. Scratches are applied at a force of 10 N using a cylindrical metal pen with a ball shaped end (radius = 0.5 mm ± 0.01). A cutting speed of 1000 mm/min is used.
A minimum of 20 scratches parallel to each other are brought up at a load of 10 N with a distance of 2 mm. The application of the scratches is repeated perpendicular to each other, so that the result is a scratching screen. The scratching direction shall be unidirectional.
The scratch resistance is reported as the difference of the luminance ΔL of the unscratched from the scratched areas. ΔL can be measured using a spectrophotometer that fulfils the requirements to DIN 5033.
Measured ΔL values must be below a maximum of 1.5.
A detailed test description of the test method can be found in the article "Evaluation of scratch resistance in multiphase PP blends" by Thomas Koch and Doris Machl, published in POLYMER TESTING 26 (2007), p. 927-936.
I) Gloss
Gloss was determined on the test specimen prepared above under item (k) according to DIN 67530 at an angle of 60°. 2. Materials
a) Polypropylene Homopolymer (PP-A-1)
Catalyst
A metallocene catalyst as described in example 1 of EP 1741725 A1 was used for the preparation of the PP homopolymer PP-A-1.
Polymerisation
The PP homopolymer PP-A-1 has been produced in a Borstar PP pilot plant as follows: The catalyst was fed together with triethylaluminium as cocatalyst with a Al/Zr ratio [mol/mol] of 911. The first polymerization step was carried out in a loop reactor at a temperature of 35°C and a pressure of 5470 kPa feeding propylene with 200 ppm of hydrogen. The resulting polymer was transferred without special separation from the process gas to the subsequent reactors. A second polymerization step was carried out in a gas phase reactor at a temperature of 65°C and a pressure of 5290 kPa, respectively feeding further propylene with 200 ppm hydrogen. After deactivation of the catalyst with steam and drying of the resulting polymer powder with warm nitrogen, the resulting polypropylene homopolymer was compounded together with 0.07 wt% Calcium Stearate and 0.60 % Irganox B225 (antioxidant combination supplied by Ciba Specialty Chemicals) in a twin screw extruder at 230 to 250 0C.
The resulting PP homopolymer has an MFR (2.16 kg, 2300C) of 7.1 g/10 min, a density of 902 kg/m3, a melting point of 1500C and an XS content of 0.7 wt%. The GPC determination resulted in a weight average molecular weight (Mw) of 260 kg/mol, a number average molecular weight (Mn) of 105 kg/mol and a MWD (Mw/Mn) of 2.5. b) Propylene Homopolymer HD905CF (PP-A-2)
HD905CF is a Ziegler-Natta based propylene homopolymer with a density of 905 kg/m3, an MFR (2.16 kg, 2300C) of 8 g/10 min, a melting point of 166°C and an XS content of 1.2 wt%. It is distributed by Borealis.
c) Ethylene Copolymer EXACT® 8230 (PE-B)
EXACT® 8230 is a metallocene-based ethylene-octene copolymer with a density of 880 kg/m3 and an MFR (2.16 kg, 1900C) of 30 g/10 min. It is distributed by DEX Plastomers.
d) Ethylene Homopolymer MG9641 B (PE-C)
MG9641 B is an ethylene homopolymer with a density of 964 kg/m3 and an MFR (2.16 kg, 190°C) of 8 g/10 min. It is distributed by Borealis.
e) Propylene Homopolymer HC001A (PP-D)
HC001A is a propylene hompolymer with a density of 905 kg/m3 and an MFR (2.16 kg, 230°C) of 3.2 g/10 min. It is distributed by Borealis.
f) Mineral Filler (Tital® 15)
Tital® 15 is a talc filler material with a particle size d97 (top cut) of 21 μm and a specific surface (BET) of 10 m2/g, distributed by Ankerpoort NV.
g) Antioxidants (Irganox 1010, lrgafos 168)
Irganox 1010 (Cas No. 6683-19-8) and lrgafos 168 (Cas No. 31570-04-4) both are distributed by Ciba Specialty Chemicals.
h) UV stabilizers (Tinuvin 770, Chimassorb 119)
Tinuvin 770 (Cas No. 52829-07-9) and Chimassorb 119 (Cas No. 106990- 43-6) both are distributed by Ciba Specialty Chemicals. i) Carbon Black (CB)
PLASBLAK PE4103 is a polyethylene based masterbatch for injection molding applications containing carbon black. It is distributed by Cabot Corporation.
j) Erucamide (ESA)
lncroslip C is used as erucamide (Cas No. 112-84-5), distributed by Croda Chemical.
3. Compositions
The components were blended according to Tables 1 and 2 in a twin screw extruder (PRISM TSE24 L/D ratio 40) with two high intensity mixing segments at temperatures between 190 and 2400C at a throughput of 10 kg/h and a screw speed of 50 rpm. The material was extruded to two circular dies of 3 mm diameter into a water bath for strand solidification and then pelletized and dried.
Table 1 : Polymer compositions containing PP-A-1
Figure imgf000022_0001
Table 2: Polymer compositions containing PP-A-2
Figure imgf000022_0002
The polymer compositions were tested on the level of volatiles and emissions as well as on their mechanical properties which are listed in Table 3.
By maintaining good mechanical properties in impact strength and flexural properties the inventive examples show excellently low emissions and volatiles. It can further be seen that injection molding of the inventive polymer compositions does not increase the amount of volatile organic compounds and the amount of fogging.
Furthermore, the injection molded test specimens with a grained surface structure prepared from the inventive polymer compositions according to item (k) in the method section show low gloss indicating a matt surface while maintaining a high scratch resistance as shown in Table 3.
Table 3: Properties of the polymer compositions
K)
Figure imgf000024_0001
n d = not determined
The application is further characterized by the following clauses:
1. Polymer composition comprising
a polyolefin base resin comprising
(A) a propylene homopolymer with a MWD of 1.5 to 5.0, and
(B) an ethylene copolymer with one or more comonomers selected from alpha-olefins with 4 to 12 carbon atoms, having a density of not greater than 920 kg/m3
wherein the polyolefin base resin has a weight ratio of propylene homopolymer (A) to ethylene copolymer (B) from 95:5 to 60:40.
2. Polymer composition according to clause 1 wherein component (A) and component (B) together are present in an amount of at least 80 wt% of the total polyolefin base resin.
3. Polymer composition according to clause 1 or 2 wherein component (A) has an weight average molecular weight Mw of 100 to 500 kg/mol, measured by GPC according to ISO 16014-1 , and -4.
4. Polymer composition according to any of the preceding clauses wherein component (A) has a MFR (2.16 kg, 2300C) of 2 to 200 g/10 min, measured according to ISO 1133.
5. Polymer composition according to any of the preceding clauses wherein component (A) has a melting point as determined by differential scanning calorimetry (DSC) of not more than 1600C.
6. Polymer composition according to any of the preceding clauses wherein component (A) has an amount of xylene cold solubles (XS) of not more than 2.0 wt%. 7. Polymer composition according to any of the preceding clauses wherein component (A) has been polymerized in the presence of a single-site catalyst.
8. Polymer composition according to any of the preceding clauses wherein component (B) has an weight average molecular weight Mw of 40 to 160 kg/mol, measured by GPC according to ISO 16014-1 , and -4.
9. Polymer composition according to any of the preceding clauses wherein component (B) has a MWD of 1.5 to 5.0.
10. Polymer composition according to any of the preceding clauses wherein component (B) has a MFR (2.16 kg, 1900C) of at least 5.0 g/10 min, measured according to ISO 1133.
11. Polymer composition according to any of the preceding clauses wherein component (B) has a comonomer content of 5 to 40 wt% based on the total component (B).
12. Polymer composition according to any of the preceding clauses wherein the comonomers of component (B) are selected from a group consisting of 1-butene, 1-hexene, 4-methyl-1-pentene and 1- octene.
13. Polymer composition according to any of the preceding clauses wherein component (B) has been polymerized in the presence of a single-site catalyst.
14. Polymer composition according to any of the preceding clauses wherein the polyolefin base resin further comprises an ethylene homopolymer (C) having a density of at least 940 kg/m3 in an amount of up to 15 wt% based on the total polyolefin base resin. 15. Polymer composition according to any of the preceding clauses wherein component (C) has a MFR (2.16 kg, 1900C) of 0.2 to 200 g/10 min, measured according to ISO 1133.
16. Polymer composition according to any of the preceding clauses wherein the polyolefin base resin is present in the polymer composition in an amount of at least 75 wt%.
17. Polymer composition according to any of the preceding clauses wherein the composition further comprises at least one filler material (D) in an amount of up to 20 wt%.
18. Polymer composition according to clause 17 wherein component (D) is an inorganic filler material.
19. Polymer composition according to clause 17 or 18 wherein component (D) is selected from talc, wollastonite, CaCO3, BaSO4 and mica.
20. Polymer composition according to clauses 17 to 19 wherein component (D) has a particle size d97 (top cut) of 50 micrometer or less, measured by laser diffraction according to ISO 13320-1 :1999.
21. Polymer composition according to any of the preceding clauses wherein the polyolefin composition has a content of volatiles of less than 45 micrograms Carbon equivalents/g, measured according to
VDA 277.
22. Polymer composition according to any of the preceding clauses wherein the polyolefin composition has an amount of volatile organic compounds of less than 100 micrograms toluene equivalents / g, measured according to VDA 278.
23. Polymer composition according to any of the preceding clauses wherein the polyolefin composition has an amount of fogging of less than 100 micrograms hexadecane equivalents / g, measured according to VDA 278.
24. The use of a polymer composition according to the clauses 1 to 23 for the manufacture of an injection molded article.
25. Use according to clause 24 for the manufacture of an injection molded article in automotive applications.
26. Article produced from a polymer composition according to clauses 1 to 23.
27. Article according to clause 26 wherein the articles are used in automotive applications.

Claims

Claims
1. Polymer composition comprising
a polyolefin base resin comprising
(A) a propylene homopolymer with a MWD of 1.5 to 5.0, and
(B) an ethylene copolymer with one or more comonomers selected from alpha-olefins with 4 to 12 carbon atoms, having a density of not greater than 920 kg/m3
wherein the polyolefin base resin has a weight ratio of propylene homopolymer (A) to ethylene copolymer (B) from 95:5 to 60:40.
2. Polymer composition according to claim 1 wherein component (A) has a MFR (2.16 kg, 2300C) of 2 to 200 g/10 min, measured according to ISO 1133.
3. Polymer composition according to claim 1 or 2 wherein component (A) has a melting point as determined by differential scanning calorimetry (DSC) of not more than 1600C.
4. Polymer composition according to any of the preceding claims wherein component (A) has been polymerized in the presence of a single-site catalyst and has an amount of xylene cold solubles (XS) of not more than 2.0 wt%.
5. Polymer composition according to any of the preceding claims wherein component (B) has a MWD of 1.5 to 5.0 and an weight average molecular weight Mw of 40 to 160 kg/mol, measured by GPC according to ISO 16014-1 , and -4.
6. Polymer composition according to any of the preceding claims wherein component (B) has a MFR (2.16 kg, 1900C) of at least 5.0 g/10 min, measured according to ISO 1133.
7. Polymer composition according to any of the preceding claims wherein component (B) has a comonomer content of 5 to 40 wt% based on the total component (B) and the comonomers of component (B) are selected from a group consisting of 1-butene, 1- hexene, 4-methyl-1-pentene and 1-octene.
8 Polymer composition according to any of the preceding claims wherein component (B) has been polymerized in the presence of a single-site catalyst.
9. Polymer composition according to any of the preceding claims wherein the polyolefin base resin further comprises an ethylene homopolymer (C) having a density of at least 940 kg/m3 in an amount of up to 15 wt% based on the total polyolefin base resin.
10 Polymer composition according to any of the preceding claims wherein the composition further comprises at least one filler material (D) in an amount of up to 20 wt%.
11. Polymer composition according to claim 10 wherein component (D) is an inorganic filler material and is selected from talc, wollastonite,
CaCO3, BaSO4 and mica.
12. Polymer composition according to any of the preceding claims wherein the polyolefin composition has a content of volatiles of less than 45 micrograms Carbon equivalents/g, measured according to VDA 277.
13. Polymer composition according to any of the preceding claims wherein the polyolefin composition has an amount of volatile organic compounds of less than 100 micrograms toluene equivalents / g and an amount of fogging of less than 100 micrograms hexadecane equivalents / g, measured according to VDA 278.
14. The use of a polymer composition according to the claims 1 to 13 for the manufacture of an injection molded article.
15. Article produced from a polymer composition according to claims 1 to 13.
16. Article with a grained surface structure, having a scratch resistance, determined as the difference of the luminance ΔL at a load of 10 N, of not more than 1 and a gloss at an angle of 60° of not more than
2.8%, comprising a polymer composition according to claims 1 to 13.
17. The use of a polymer composition for the production of an article with a grained surface structure having a scratch resistance, determined as the difference of the luminance ΔL at a load of 10 N, of not more than 1 and a gloss at an angle of 60° of not more than 2.8%.
PCT/EP2009/002617 2008-04-10 2009-04-08 Low emission polymer composition WO2009124753A1 (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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WO2019162932A1 (en) * 2018-02-20 2019-08-29 Carmel Olefins Ltd. Polypropylene impact copolymers with reduced emission of volatiles
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Families Citing this family (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1988122A1 (en) 2007-05-04 2008-11-05 Total Petrochemicals Research Feluy Blend for use in automobile application
WO2010149549A1 (en) * 2009-06-22 2010-12-29 Borealis Ag Automotive interior article with reduced smell
US8178623B2 (en) * 2010-06-10 2012-05-15 Dow Global Technologies Llc High stiffness high impact propylene impact copolymers field of the invention
WO2012049204A1 (en) * 2010-10-14 2012-04-19 Basell Poliolefine Italia S.R.L. Automotive interior element
EP2898016B1 (en) 2012-09-19 2017-02-15 Saudi Basic Industries Corporation Process for the preparation of a composition comprising heterophasic propylene copolymer and talc
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CN105294893B (en) * 2014-07-25 2018-11-13 中国石化扬子石油化工有限公司 A kind of production method of efficient scratch-resistant polypropylene dedicated material
EP3124537B1 (en) 2015-07-31 2020-01-08 Borealis AG Low volatile polypropylene composition
WO2017079246A1 (en) * 2015-11-02 2017-05-11 Braskem America, Inc. Low emission propylene-based polymer resins
CN108137888B (en) * 2015-11-05 2020-04-10 巴塞尔聚烯烃意大利有限公司 Heterophasic propylene copolymer
KR102061282B1 (en) * 2016-03-18 2019-12-31 주식회사 엘지화학 Polypropylene
CN109476888B (en) 2016-05-31 2022-09-23 陶氏环球技术有限责任公司 Thermoplastic polyolefin blends comprising ethylene-rich polymers
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WO2018114979A1 (en) * 2016-12-23 2018-06-28 Sabic Global Technologies B.V. Interior automotive part
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EP3647328B1 (en) * 2018-10-31 2023-09-06 Borealis AG Reduction in voc and fog values of polypropylene grades by aeration
EP3647349A1 (en) 2018-10-31 2020-05-06 Borealis AG Aerated polypropylene compositions exhibiting specific emission profiles
EP3786190A1 (en) 2019-08-30 2021-03-03 Borealis AG Reduction in voc and fog values of filled heterophasic polypropylene by separate aeration of individual polyolefin components
KR20230080688A (en) 2021-11-30 2023-06-07 한화토탈에너지스 주식회사 Polypropylene Resin Composition with High Flowability and Article Molded Therefrom

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997008238A1 (en) * 1995-08-29 1997-03-06 Exxon Chemical Patents Inc. Radiation tolerant polypropylene and its useful articles
WO2004033509A1 (en) * 2002-10-07 2004-04-22 Dow Global Technologies Inc. Highly crystalline polypropylene with low xylene solubles
WO2007002435A1 (en) * 2005-06-24 2007-01-04 Dow Global Technologies Inc. Automotive articles prepared from filled tpo compositions, and methods of making the same

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19812229A1 (en) 1998-03-20 1999-09-23 Basf Ag Polymers of propene
GB0014547D0 (en) 2000-06-14 2000-08-09 Borealis Tech Oy Improvements in or relating to polymers
EP1236769A1 (en) 2001-02-21 2002-09-04 Borealis Technology Oy Heterophasic propylene polymer
EP1364760B2 (en) 2002-05-22 2017-12-13 Borealis Technology Oy Emission-reduced articles from longfiber reinforced polypropylene
GB0317012D0 (en) 2003-07-21 2003-08-27 Borealis Tech Oy Injection moulding polymer
EP1535718B1 (en) 2003-11-28 2008-01-02 Borealis Technology OY Process for removing volatile components from a filled thermoplast
EP1741725B1 (en) 2005-07-08 2014-04-09 Borealis Technology Oy Propylene polymer composition
SI1788022T1 (en) 2005-11-16 2009-04-30 Borealis Tech Oy Polypropylene resin with low shrinkage, high impact strength, stiffness and scratch resistance
US7855802B2 (en) * 2006-04-06 2010-12-21 Canon Kabushiki Kaisha Time-efficient generation of color look-up table
EP2147939A1 (en) 2008-07-22 2010-01-27 Borealis AG Polypropylene composition with improved optics for film and moulding applications

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997008238A1 (en) * 1995-08-29 1997-03-06 Exxon Chemical Patents Inc. Radiation tolerant polypropylene and its useful articles
WO2004033509A1 (en) * 2002-10-07 2004-04-22 Dow Global Technologies Inc. Highly crystalline polypropylene with low xylene solubles
WO2007002435A1 (en) * 2005-06-24 2007-01-04 Dow Global Technologies Inc. Automotive articles prepared from filled tpo compositions, and methods of making the same

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3071607B1 (en) 2013-11-22 2018-05-09 Borealis AG Low emission propylene homopolymer
EP3307820B1 (en) 2015-06-12 2019-10-02 SABIC Global Technologies B.V. Process for manufacture of low emission polypropylene
EP3317341B1 (en) 2015-06-30 2023-03-22 Dow Global Technologies LLC Polypropylene/inorganic particle blend composition for pvc-free wear layer in resilient flooring
EP3260489A1 (en) 2016-06-24 2017-12-27 Borealis AG Novel polypropylene compositions with low fogging
WO2017220556A1 (en) 2016-06-24 2017-12-28 Borealis Ag Novel polypropylene compositions with low fogging
US10781304B2 (en) 2016-06-24 2020-09-22 Borealis Ag Polypropylene compositions with low fogging
WO2019162932A1 (en) * 2018-02-20 2019-08-29 Carmel Olefins Ltd. Polypropylene impact copolymers with reduced emission of volatiles
US11377544B2 (en) 2018-02-20 2022-07-05 Carmel Olefins Ltd. Polypropylene impact copolymers with reduced emission of volatiles

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