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WO2025120035A1 - Composition de polypropylène à résistance aux chocs améliorée - Google Patents

Composition de polypropylène à résistance aux chocs améliorée Download PDF

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Publication number
WO2025120035A1
WO2025120035A1 PCT/EP2024/084814 EP2024084814W WO2025120035A1 WO 2025120035 A1 WO2025120035 A1 WO 2025120035A1 EP 2024084814 W EP2024084814 W EP 2024084814W WO 2025120035 A1 WO2025120035 A1 WO 2025120035A1
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Prior art keywords
polypropylene composition
ethylene
range
tested according
mfi
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English (en)
Inventor
Jiaoyan ZHOU
Bin Sun
Junhua Zhang
Christelle Marie Hélène Grein
Jing Guo
Markus Willem Henricus FEEKES
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SABIC Global Technologies BV
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SABIC Global Technologies BV
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Publication of WO2025120035A1 publication Critical patent/WO2025120035A1/fr
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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
    • C08F210/00—Copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
    • C08F210/04—Monomers containing three or four carbon atoms
    • C08F210/06—Propene
    • 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
    • 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
    • C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2207/00—Properties characterising the ingredient of the composition
    • C08L2207/02—Heterophasic composition
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2314/00—Polymer mixtures characterised by way of preparation
    • C08L2314/02—Ziegler natta catalyst

Definitions

  • the invention relates to a polypropylene composition, to a process for obtaining the same and an article comprising the same, in particular an extruded article, such as an automotive part.
  • Polypropylene (PP) accounts for more than half of all the plastic materials used in automobiles because of its low cost but with outstanding mechanical properties and moldability. PP compounds are used for a variety of parts, including bumper facias, instrumental panels and door trims. Several grades of PP compounds, with their diverse performance characteristics, have been developed by compounding PP with various other materials according to the performance requirements of the intended parts.
  • a general constitution of PP compounds for automotive applications comprises a heterophasic propylene copolymer, an ethylene-based elastomer to improve impact strength and an inorganic filler such as talc to improve rigidity.
  • the present invention provides a polypropylene composition comprising the following components:
  • HECO1 and HECO2 respectively comprises a propylene-based matrix and a dispersed ethylene-a-olefin copolymer
  • the amount of the dispersed ethylene-a-olefin copolymer in HECO1 (RC1) is less than the amount of the dispersed ethylene-a-olefin copolymer in HECO2 (RC2).
  • the PP composition of the present invention has improved performances including at least one of impact strength, flexural modulus, tensile modulus and VEM ductility.
  • Heterophasic propylene copolymers are generally prepared in one or more reactors, by polymerization of propylene in the presence of a catalyst and subsequent polymerization of an ethylene-a-olefin mixture.
  • the resulting polymeric materials are heterophasic, but the specific morphology usually depends on the preparation method and monomer ratios used.
  • heterophasic propylene copolymers employed in the present invention can be produced using any conventional technique known to the skilled person, for example multistage process polymerization, such as bulk polymerization, gas phase polymerization, slurry polymerization, solution polymerization or any combinations thereof.
  • Any conventional catalyst systems for example, Ziegler-Natta or metallocene may be used.
  • Such techniques and catalysts are described, for example, in W006/010414; Polypropylene and other Polyolefins , by Ser van der Ven, Studies in Polymer Science 7, Elsevier 1990; W006/010414; US4399054 and US4472524.
  • the heterophasic propylene copolymer is made using Ziegler-Natta catalyst.
  • the heterophasic propylene copolymer may be prepared by a process comprising
  • the steps are preferably performed in different reactors.
  • the catalyst systems for the first step and for the second step may be different or same.
  • the heterophasic propylene copolymer of the composition of the invention comprises a propylene-based matrix and a dispersed ethylene-a-olefin copolymer.
  • the propylene- based matrix typically forms the continuous phase in the heterophasic propylene copolymer.
  • the amounts of the propylene-based matrix and the dispersed ethylene-a- olefin copolymer may be determined by 13 C-NMR, as well known in the art.
  • the propylene-based matrix consists of a propylene homopolymer and/or a propylene copolymer consisting of at least 90 wt% of propylene monomer units and at most 10 wt% of comonomer units selected from ethylene monomer units and a-olefin monomer units having 4 to 10 carbon atoms, for example consisting of at least 95 wt% of propylene monomer units and at most 5 wt% of the comonomer units, based on the total weight of the propylene-based matrix.
  • the comonomer in the propylene copolymer of the propylene-based matrix is selected from the group of ethylene, 1-butene, 1-pentene, 4-methyl-1 -pentene, 1- hexene, 1 -heptene and 1 -octene, and is preferably ethylene.
  • the propylene-based matrix consists of a propylene homopolymer.
  • the fact that the propylene-based matrix consists of a propylene homopolymer is advantageous in that a higher stiffness is obtained compared to the case where the propylene-based matrix is a propylene-a-olefin copolymer.
  • MFI PP The melt flow index (MFI) of the propylene-based matrix (before the heterophasic propylene copolymer is mixed into the composition of the invention), MFI PP , may be for example at least 0.1 dg/min, at least 0.2 dg/min, at least 0.3 dg/min, at least 0.5 dg/min, and/or for example at most 20 dg/min, at most 10 dg/min, at most 5.0 dg/min, at most 3.0 dg/min, at most 1.0 dg/min, measured according to ISO1133-1 :2011 (2.16 kg/230°C).
  • the propylene-based matrix is present in an amount of 60 to 98 wt%, for example at most 97 wt%, at most 96 wt%, at most 95 wt%, at most 93 wt% or at most 91 wt%, based on the total heterophasic propylene copolymer.
  • the propylene-based matrix is present in an amount of at least 70 wt%, more preferably at least 75 wt%, for example at least 80 wt%, at least 85 wt%, at least 87 wt% or at least 90 wt%, based on the total heterophasic propylene copolymer.
  • the propylene-based matrix is preferably semi-crystalline, that is it is not 100% amorphous, nor is it 100% crystalline.
  • the propylene-based matrix is at least 40% crystalline, for example at least 50%, for example at least 60% crystalline and/or for example at most 80% crystalline, for example at most 70% crystalline.
  • the propylene-based matrix has a crystallinity of 60 to 70%.
  • the degree of crystallinity of the propylene-based matrix is measured using differential scanning calorimetry (DSC) according to ISO11357-1 and ISO11357- 3 of 1997, using a scan rate of 10°C/min, a sample of 5mg and the second heating curve using as a theoretical standard for a 100% crystalline material 207.1 J/g.
  • DSC differential scanning calorimetry
  • the amount of ethylene monomer units in the ethylene-a-olefin copolymer is 10 to 60 wt%, preferably 20 to 58 wt%, 30 to 55 wt% or 40 to 52 wt%.
  • the amount of ethylene monomer units in the dispersed ethylene-a-olefin copolymer in the heterophasic propylene copolymer may herein be sometimes referred as RCC2.
  • the a-olefin in the ethylene-a-olefin copolymer is preferably chosen from the group of a-olefins having 3 to 8 carbon atoms.
  • suitable a-olefins having 3 to 8 carbon atoms include but are not limited to propylene, 1 -butene, 1 -pentene, 4-methyl- 1 -pentene, 1 -hexene, 1 -heptene and 1 -octene.
  • the a-olefin in the ethylene-a-olefin copolymer is chosen from the group of a-olefins having 3 to 4 carbon atoms and any mixture thereof, more preferably the a-olefin is propylene, in which case the ethylene-a-olefin copolymer is ethylene-propylene copolymer.
  • MFI rU bber The MFI of the dispersed ethylene a-olefin copolymer (before the heterophasic propylene copolymer is mixed into the composition of the invention), MFI rU bber, may be for example at least 0.001 dg/min, at least 0.03 dg/min or at least 0.05 dg/min, and/or for example at most 0.1 dg/min or 0.01 dg/min. MFI rU bber is calculated according to the following formula:
  • MFIheterophasic is the MFI (dg/min) of the heterophasic propylene copolymer measured according to ISO1133-1 :2011 (2.16kg/230°C)
  • MFI ma trix is the MFI (dg/min) of the propylene-based matrix measured according to ISO1133-1 :2011 (2.16kg/230°C)
  • matrix content is the fraction of the propylene-based matrix in the heterophasic propylene copolymer
  • rubber content is the fraction of the dispersed ethylene-a-olefin copolymer in the heterophasic propylene copolymer.
  • the sum of the matrix content and the rubber content is 1 .
  • Log in the formula means log-io.
  • the dispersed ethylene-a-olefin copolymer is present in an amount of 2.0 to 40 wt%, for example at least 3.0 wt%, at least 4.0 wt%, at least 5.0 wt%, at least 7.0 wt% or at least 9.0 wt%, based on the total heterophasic propylene copolymer.
  • the dispersed ethylene-a-olefin copolymer is present in an amount of at most 30 wt%, more preferably at most 25 wt%, for example at most 20 wt%, at most 15 wt%, at most 13 wt% or at most 10 wt%, based on the total heterophasic propylene copolymer.
  • the sum of the total weight of the propylene-based matrix and the total weight of the dispersed ethylene-a-olefin copolymer may be at least 95 wt%, at least 97 wt%, at least 99 wt% or 100 wt% of the heterophasic propylene copolymer.
  • the heterophasic propylene copolymer has a fraction soluble in p-xylene at 25°C (CXS) measured according to ISO 16152:2005 of 2.0 to 40 wt%, for example 9.0 to 25 wt%.
  • CXS fraction soluble in p-xylene at 25°C
  • the amount of ethylene monomer units in the heterophasic propylene copolymer (sometimes referred as TC2) is in the range of 1 .0 to 20 wt%, for example 5.0 to 15 wt%, based on the heterophasic propylene copolymer.
  • the polypropylene composition of the present invention comprises at least two heterophasic propylene copolymers: a first heterophasic propylene copolymer, referred to as HECO1 , and a second heterophasic propylene copolymer, referred to as HECO2.
  • HECO1 and HECO2 are respectively a heterophasic propylene copolymer as described above.
  • the amount of HECO1 with respect to the composition is 20-60 wt%, such as 24 wt%, 28 wt%, 32 wt%, 36 wt%, 40 wt%, 44 wt%, 48 wt%, 52 wt%, or 56 wt%, preferably 30-50 wt%, and more preferably 35-45 wt%.
  • HECO1 has an MFI (melt flow index), tested according to ISO1133 at 2.16 kg and 230°C, of at least 60 dg/min, preferably at least 70 dg/min, and more preferably in the range of 80-120 dg/min.
  • MFI melt flow index
  • the amount of HECO2 with respect to the composition is 10-40 wt%, such as 13 wt%, 17 wt%, 21 wt%, 25 wt%, 29 wt%, 33 wt%, 37 wt%, preferably 20-30 wt%.
  • HECO2 has an MFI, tested according to ISO1133 at 2.16 kg and 230°C, of at most 55 dg/min, preferably at most 50 dg/min, and more preferably in the range of 10-45 dg/min, even more preferably in the range of 11-40 dg/min.
  • the combinational amount of HECO1 and HECO2 with respect to the composition is preferably 50-80 wt%, and more preferably 60-75 wt%.
  • a ratio of the amount of HECO1 to the amount of HECO2 is 1.1 to 5.0, such as 1.5, 1.9, 2.3, 2.7, 3.1 , 3.5, 3.9, 4.3, or 4.7, preferably 1 .4 to 4.0.
  • the amount of the dispersed ethylene-a-olefin copolymer in HECO1 is less than the amount of the dispersed ethylene-a-olefin copolymer in HECO2 (RC2), i.e., RC1 ⁇ RC2.
  • RC1 is in the range of 5-28 wt%, such as 8 wt%, 10 wt%, 12 wt%, 15 wt%, 20 wt% or 25 wt%.
  • RC2 is in the range of 15-40 wt%, such as 18 wt%, 20 wt%, 25 wt%, 30 wt%, or 35 wt%.
  • the polypropylene composition of the present invention comprises at least one ethylene-based elastomer, in particular, a first elastomer consisting of ethylene and octene monomers, and a second elastomer comprising ethylene and a-olefin comonomers having 4 to 8 carbon atoms.
  • the first elastomer has a density in the range of 0.845-0.860 g/cm 3 .
  • the first elastomer has an MFI, tested according to ASTM D1238 at 2.16 kg and 190°C, of at most 5 dg/min, for example 0.1- 5 dg/min.
  • the second elastomer has a density in the range of 0.861-0.950 g/cm 3 .
  • the second elastomer has an MFI, tested according to ASTM D1238 at 2.16 kg and 190°C, of at most 10 dg/min, preferably at most 5 dg/min, such as 0.1-5 dg/min.
  • the second elastomer has an ethylene comonomer content in the range of 40-90 mol%, preferably in the range of 50-80 mol%.
  • An ethylene-a-olefin copolymer is a copolymer of ethylene and a-olefin comonomer having 4 to 10 carbon atoms, preferably 4 to 8 carbon atoms, more preferably is an acyclic monoolefin such as 1-butene, 1- pentene, 1-hexene, 1-octene, or 4-methyl-1- pentene.
  • the ethylene-a-olefin copolymer has a density in the range of 0.840 to 0.890 g/cm 3 .
  • the density may be measured according to ASTM D792.
  • the ethylene-a-olefin copolymer may be prepared using methods known in the art, for example by using a single site catalyst, i.e., a catalyst the transition metal components of which is an organometallic compound and at least one ligand of which has a cyclopentadienyl anion structure through which such ligand bondingly coordinates to the transition metal cation.
  • a single site catalyst i.e., a catalyst the transition metal components of which is an organometallic compound and at least one ligand of which has a cyclopentadienyl anion structure through which such ligand bondingly coordinates to the transition metal cation.
  • This type of catalyst is also known as "metallocene" catalyst.
  • Metallocene catalysts are for example described in U.S. Patent Nos.
  • the first elastomer is an ethylene-octene copolymer.
  • the ethylene-octene copolymer has a density in the range of 0.845-0.860g/cm 3 .
  • the amount of the ethylene-octene copolymer with respect to the composition of the invention is 2-20 wt%, preferably 5-15 wt%, more preferably 7-12 wt%.
  • the MFI of the ethylene-octene copolymer, tested according to ASTM D1238 at 2.16 kg and 190°C, is at most 10 dg/min, preferably at most 5 dg/min.
  • the second elastomer is an ethylene-octene copolymer.
  • the ethylene-octene copolymer has a density in the range of 0.861-0.880 g/cm 3 .
  • the amount of the ethylene-octene copolymer with respect to the composition of the invention is 2-20 wt%, preferably 5-15 wt%, more preferably 7-12 wt%.
  • the MFI of the ethylene-octene copolymer, tested according to ASTM D1238 at 2.16 kg and 190°C, is at most 10 dg/min, preferably at most 5 dg/min.
  • the second elastomer is an ethylene-butylene copolymer.
  • the ethylene-butylene copolymer has a density in the range of 0.861-0.880 g/cm 3 .
  • the amount of the ethylene-butylene copolymer with respect to the composition of the invention is 2-20 wt%, preferably 5-15 wt%, more preferably 7-12 wt%.
  • the MFI of the ethylene-butylene copolymer, tested according to ASTM D1238 at 2.16 kg and 190°C, is at most 10 dg/min, preferably at most 5 dg/min.
  • the second elastomer is a block copolymer comprising ethylene, a-olefin comonomers and styrene or alpha-methyl styrene comonomer.
  • the block copolymer is preferably selected from the group consisting of polystyrene- poly(ethylene-propylene) (SEP), poly(ethylene-butylene)-polystyrene (SEBS), polystyrene-poly(ethylene-propylene)-polystyrene, and polystyrene-poly(ethylene- propylene-styrene)-polystyrene. More preferably, the block copolymer is polystyrene- poly(ethylene-butylene)- polystyrene (SEBS).
  • the amount of the block copolymer with respect to the composition of the invention is 2-20 wt%, preferably 5-15 wt%, more preferably 7-12 wt%.
  • the block copolymer has a density in the range of 0.880-0.950 g/cm 3 , and an MFI, tested according to ASTM D1238 at 2.16 kg and 190°C, of at most 10 dg/min, preferably at most 5 dg/min.
  • the amount of styrene or alpha-methyl styrene in the block copolymer is typically 5 to 30 wt%, for example 10 to 20 wt%, based on the block copolymer.
  • the amount of ethylene in the block copolymer may typically be 40-60 wt% based on the block copolymer.
  • the amount of components of the block copolymer, such as ethylene, butylene and styrene or alpha-methyl styrene may be determined by13C NMR measurements, for example according to the following method: The samples are dissolved in C2D2CI4 at 130°C. 2,6-Di-tert-butyl-p-cresol (DBPC) is added as an internal stabilizer.
  • DBPC 2,6-Di-tert-butyl-p-cresol
  • The13 C NMR measurements are performed on a Bruker500 Avance III NMR spectrometer equipped with a 10mm-diameter cryo-cooled probehead operating at 125°C.
  • the weight percentage of ethylene, butylene and styrene are obtained by analyzing the13C NMR spectra.
  • composition of the invention comprises a filler, which is a High aspect ratio (HAR) talc.
  • HAR High aspect ratio
  • the HAR talc is a natural mineral that can be processed to obtain HAR talc.
  • the HAR talc is preferably a powder.
  • the HAR talc preferably has a thinness index greater than 2.8, preferably 3.5, more preferably greater than 4.0, even more preferably greater than 4.5.
  • the thinness index characterizes the shape of the particle, and more specifically its flatness (large size/thickness).
  • the thinness index will be measured by the difference between, on the one hand, the value of the average size of the powder particles obtained by particle size measurement (standard AFNOR NFX11-666) by Malvern laser diffraction using the wet method, and On the other hand, the difference is related to the value of the mean diameter D50 obtained by the measurement by the sedimentation method using "Sedigraph” (standard AFNOR X11-683) (see also its description in US 6,348,536).
  • HAR talcs mention may be made of Luzenac W92 and T84. These HAR talcs have a thinness index of at least 2.8.
  • the amount of the HAR talc in the polypropylene composition of the present invention is 2-30 wt%, preferably 5-25 wt%, more preferably 10-15 wt%. In one embodiment, the total amount of components A-E is at least 90 wt%, preferably at least 95 wt%, more preferably at least 98 wt%, of the polypropylene composition.
  • the HAR talc has a D95 diameter in the range of 2-8 micrometers, preferably 3-5 micrometers.
  • D95 means the particle size which 95% of the total particles are smaller than. This value may be determined e.g. by known techniques based on the principle of light diffraction.
  • the HAR talc has an aspect ratio in the range of 100-140, preferably in the range of 110-130.
  • An aspect ratio means a ratio of the largest diameter of a talc particle over the smallest diameter of a talc particle orthogonal to the largest diameter. The aspect ratio is 1 for a perfectly round particle, and approaches a very high number for a very elongated particle (that is the particle has a high aspect ratio).
  • composition according to the invention may optionally comprise (F) additives.
  • the additives may include at least one selected from the group consisting of: nucleating agents, stabilizers, e.g. heat stabilizers, anti-oxidants, UV stabilizers; colorants, like pigments and dyes; clarifiers; surface tension modifiers; lubricants; flame-retardants; mould-release agents; flow improving agents; plasticizers; anti-static agents; and blowing agents.
  • nucleating agents e.g. heat stabilizers, anti-oxidants, UV stabilizers
  • colorants like pigments and dyes
  • clarifiers e.g. heat stabilizers, anti-oxidants, UV stabilizers
  • surface tension modifiers e.g., lubricants, flame-retardants; mould-release agents
  • flow improving agents e.g. heat stabilizers, anti-oxidants, UV stabilizers
  • colorants e.g. heat stabilizers, anti-oxidants, UV stabilizers
  • clarifiers e.g. surface tension modifiers
  • lubricants
  • the skilled person can readily select any suitable combination of additives and additive amounts without undue experimentation.
  • the amount of the additives depends on their type and function and typically is of from 0 to about 10 wt%.
  • the amount of the additives may e.g. be from about 0.1 to about 5 wt%; from about 1 to about 4 wt% or from 1 .5 to about 3 wt% based on the total composition.
  • the total amount of (A), (B), (C), (D), (E) and (F) should add up to 100% by weight.
  • the polypropylene composition of the present invention comprises at least two heterophasic propylene copolymers, at least two elastomers, and a talc, as described above.
  • the polypropylene composition of the present invention has an MFI, tested according to ISO1133 at 2.16 kg and 230°C, in the range of 20-50 dg/min, preferably 25-40 dg/min.
  • the polypropylene composition of the present invention has an Izod impact strength, tested according to ISO180/1A (II) at 23 °C, of 30-70 KJ/m 2 , preferably 40-60 KJ/m 2 .
  • the polypropylene composition of the present invention has an Izod impact strength, tested according to ISO180/1A (II) at -20 °C, of 5-30 KJ/m 2 , preferably 7-30 KJ/m 2 .
  • the polypropylene composition of the present invention has a Charpy impact strength, tested according to ISO179/1eA (II) at 23°C, of 45-80 KJ/m 2 , preferably 48-70 KJ/m 2 , more preferably 50-60 KJ/m 2 .
  • the polypropylene composition of the present invention has a Charpy impact strength, tested according to ISO179/1eA (II) at -20°C, of 5.60-10.00 KJ/m 2 , preferably 5.70-9.00 KJ/m 2 , more preferably 6.00-8.00 KJ/m 2 .
  • the polypropylene composition of the present invention has a Charpy impact strength, tested according to ISO179/1eA (II) at -30°C, of 100-150 KJ/m 2 , preferably 105-130 KJ/m 2 , more preferably 110-130 KJ/m 2 .
  • the polypropylene composition of the present invention has a flexural modulus, tested according to ISO 178 (II) at 23°C, of at least 1630 MPa, and/or at most 2000MPa.
  • the polypropylene composition of the present invention has a tensile modulus, tested according to ISO 527/1 A (II) at 23°C, of at least 1620 MPa, and/or at most 2000MPa.
  • the composition of the invention may be obtained by a process comprising melt-mixing the heterophasic propylene copolymers, the at least one elastomer, and the talc, in particular, components (A), (B), (C), (D), (E) and optionally (F), by using any suitable means. Accordingly, the invention further relates to a process for the preparation of the composition according to the invention comprising melt mixing (A), (B), (C), (D), (E) and optionally (F).
  • the composition of the invention is made in a form that allows easy processing into a shaped article in a subsequent step, like in pellet or granular form.
  • the composition can be a mixture of different particles or pellets; like a blend of (A), (B), (C), (D), (E) and a masterbatch of additives.
  • the composition of the invention is in pellet or granular form as obtained by mixing all components in an apparatus like an extruder; the advantage being a composition with homogeneous and well-defined concentrations of the additives.
  • melt-mixing may be done using techniques known to the skilled person, for example in an extruder. Generally, in the process of the invention, melt-mixing is performed at a temperature in the range of 200 to 260°C.
  • Suitable conditions for melt-mixing such as temperature, pressure, amount of shear, screw speed and screw design when an extruder is used are known to the skilled person.
  • composition according to the invention may be processed by known processing methods, for example, injection molding and extrusion.
  • Injection moulding is widely used to produce articles such as for example caps and closures, batteries, pails, containers, automotive exterior parts like bumpers, automotive interior parts like instrument panels, or automotive parts under the bonnet.
  • Thin wall injection moulding may for example be used to make thin wall packaging.
  • Extrusion is widely used to produce articles such as for example rods, sheets, films and pipes.
  • the invention further relates to an article comprising the composition according to the invention, in particular an extruded article.
  • the term ‘comprising’ does not exclude the presence of other elements.
  • a description on a product/composition comprising certain components also discloses a product/composition consisting of these components.
  • the product/composition consisting of these components may be advantageous in that it offers a simpler, more economical process for the preparation of the product/composition.
  • a description on a process comprising certain steps also discloses a process consisting of these steps. The process consisting of these steps may be advantageous in that it offers a simpler, more economical process.
  • HECOs Heterophasic propylene copolymers
  • HECO_1-HECO_3 are heterophasic propylene copolymers prepared in an InnoveneTM process, wherein a sequential two-reactor setup was employed. Polypropylene homopolymers were produced in first reactor and propylene-ethylene copolymers were produced in the second reactor.
  • a procatalyst There were three components in the catalyst system in the polymerization process: A procatalyst, an external electron donor and a co-catalyst.
  • the procatalyst was prepared according to the description in WO2016198344, page 36, “Procatalyst III” paragraph.
  • the external electron donor used for HECO_1 and HECO_2 was di(iso-propyl) dimethoxysilane (DiPDMS), the external electron donor used for HECO_3 was n- propyltriethoxysilane (nPTES); the co-catalyst was triethylaluminium.
  • DiPDMS di(iso-propyl) dimethoxysilane
  • nPTES n- propyltriethoxysilane
  • co-catalyst was triethylaluminium.
  • Table 1 The process conditions of HECO_1-HECO_3 are given in the following Table 1 .
  • R1 refers to the first reactor
  • R2 refers to the second reactor
  • Te refers to temperature
  • Pr refers to pressure
  • Al/Ti is the molar ratio of the co-catalyst to the procatalyst
  • Si/Ti is the molar ratio of the external donor to the procatalyst
  • H2/C3 is the molar ratio of hydrogen to propylene
  • C2/C3 is the molar ratio of ethylene to propylene
  • split is the amount of substance produced in R1 or R2 based on the amount of the total Polymer HECO_1-HECO_3 respectively.
  • HECO_4 is SABIC® PP 90910.
  • HECO_5 is SABIC® PP FPC100.
  • HECO_1-HECO_5 The properties of HECO_1-HECO_5 are given in the following Table 2.
  • POE_1 is an ethylene- 1 -octene copolymer with an MFI of 1.0 dg/min as measured according to ASTM D1238 at 190°C, 2.16kg and a density of 0.857 g/cm 3 as measured according to ASTM D792.
  • POE_2 is an ethylene-butylene copolymer with an MFI of 0.5 dg/min as measured according to ASTM D1238 at 190°C, 2.16kg and a density of 0.861 g/cm 3 as measured according to ASTM D792.
  • POE_3 is an ethylene- 1 -octene copolymer with an MFI of 5.0 dg/min as measured according to ASTM D1238 at 190°C, 2.16kg and a density of 0.868 g/cm 3 as measured according to ASTM D792.
  • SEBS is a linear triblock copolymer based on styrene and ethylene/butylene with a polystyrene content of 13 mol%, a density of 0.90 g/cm 3 as measured according to ASTM D792, and an MFI of 1.8 dg/min as measured according to ASTM D1238 at 190°C, 2.16kg.
  • Talc_1 is an ultrafine HAR talc with a D95 diameter in the range of 3-5 micrometers tested via laser analysis, and an aspect ratio in the range of 110-130.
  • Talc_2 is Luzenac HAR T84 commercially available from Imerys with an aspect ratio in the range of 110-130.
  • AOB225 antioxidants
  • NA11 nucleating agent
  • Melt flow index was measured according to ISO1133:1-2011 at 230°C, 2.16kg.
  • Izod impact (notched) strength was measured according to ISO 180/1 A (II) at 23°C, and -20°C after 7 days.
  • Charpy impact (notched) strength was measured according to IS0179/1 eA (II) at 23°C, -20°C, and -30°C after 7 days.
  • Flexural properties were measured according to IS0178 (II) at 23°C after 7 days.
  • Tensile properties were measured according to ISO 527/1A (II) at 23°C after 7 days.
  • Density was measured according to ISO 1183-1 :2004.
  • VEM val energie meting
  • the ISO 6603-2 curve type evaluation is a common method to characterize the force/ deflection data obtained by puncture test experiments. It provides four typical types of curve progression that can usually be observed during data evaluation. In general, these range from ductile to brittle and focus on information like yielding, crack initiation and crack propagation. Obtained data has been divided into four break types summarized below:
  • YU Yielding followed by unstable cracking (Semi-brittle) - least preferred NY: No yielding (Brittle) - not preferred.
  • compositions shown in Tables 3 and 4 were melt-mixed in a twin-screw extruder to obtain pellets. The pellets were further injection moulded into specimens for measurements of properties shown in the tables.

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

La présente invention concerne une composition de polypropylène, son procédé d'obtention et un article comprenant celle-ci, en particulier un article extrudé, tel qu'une pièce automobile. La composition de PP comprend de 20 à 60 % en poids d'un premier copolymère de propylène hétérophasique (HECO1) ayant un MFI d'au moins 60 dg/min, de 10 à 40 % en poids d'un second copolymère de propylène hétérophasique (HECO2) ayant un MFI d'au plus 55 dg/min, de 2 à 20 % en poids d'un premier élastomère constitué de monomères d'éthylène et d'octène ayant une masse volumique d'au plus 0,860 g/cm3, de 2 à 20 % en poids d'un second élastomère comprenant des comonomères d'éthylène et d'α-oléfine ayant de 4 à 8 atomes de carbone, avec une masse volumique d'au moins 0,861 g/cm3, et de 2 à 30 % en poids d'un talc ayant un rapport d'aspect dans la plage de 100 à 140.
PCT/EP2024/084814 2023-12-07 2024-12-05 Composition de polypropylène à résistance aux chocs améliorée Pending WO2025120035A1 (fr)

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Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4399054A (en) 1978-08-22 1983-08-16 Montedison S.P.A. Catalyst components and catalysts for the polymerization of alpha-olefins
US4472524A (en) 1982-02-12 1984-09-18 Montedison S.P.A. Components and catalysts for the polymerization of olefins
US5017714A (en) 1988-03-21 1991-05-21 Exxon Chemical Patents Inc. Silicon-bridged transition metal compounds
US5324820A (en) 1988-07-15 1994-06-28 Central Sydney Area Health Service Acid-labile subunit (ALS) of insulin-like growth factor binding protein complex
US6348536B1 (en) 1997-04-04 2002-02-19 Talc De Luzenac Lamellar filler process for the treatment of polymers
WO2006010414A1 (fr) 2004-07-30 2006-02-02 Saudi Basic Industries Corporation Compositions copolymeres de propylene de transparence elevee
WO2016198344A1 (fr) 2015-06-12 2016-12-15 Sabic Global Technologies B.V. Processus de fabrication de polypropylène à faible émission
US20180002515A1 (en) * 2014-12-22 2018-01-04 Sabic Global Technologies B.V. Polypropylene composition
US20180319967A1 (en) * 2015-10-06 2018-11-08 Borealis Ag Polypropylene compositions for automotive applications
US20230014149A1 (en) * 2019-12-24 2023-01-19 Sabic Global Technologies B.V. Heterophasic propylene copolymer composition with low gloss
WO2023174732A1 (fr) * 2022-03-14 2023-09-21 Sabic Global Technologies B.V. Composition copolymère de propylène hétérophasique

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4399054A (en) 1978-08-22 1983-08-16 Montedison S.P.A. Catalyst components and catalysts for the polymerization of alpha-olefins
US4472524A (en) 1982-02-12 1984-09-18 Montedison S.P.A. Components and catalysts for the polymerization of olefins
US5017714A (en) 1988-03-21 1991-05-21 Exxon Chemical Patents Inc. Silicon-bridged transition metal compounds
US5324820A (en) 1988-07-15 1994-06-28 Central Sydney Area Health Service Acid-labile subunit (ALS) of insulin-like growth factor binding protein complex
US6348536B1 (en) 1997-04-04 2002-02-19 Talc De Luzenac Lamellar filler process for the treatment of polymers
WO2006010414A1 (fr) 2004-07-30 2006-02-02 Saudi Basic Industries Corporation Compositions copolymeres de propylene de transparence elevee
US20180002515A1 (en) * 2014-12-22 2018-01-04 Sabic Global Technologies B.V. Polypropylene composition
WO2016198344A1 (fr) 2015-06-12 2016-12-15 Sabic Global Technologies B.V. Processus de fabrication de polypropylène à faible émission
US20180319967A1 (en) * 2015-10-06 2018-11-08 Borealis Ag Polypropylene compositions for automotive applications
US20230014149A1 (en) * 2019-12-24 2023-01-19 Sabic Global Technologies B.V. Heterophasic propylene copolymer composition with low gloss
WO2023174732A1 (fr) * 2022-03-14 2023-09-21 Sabic Global Technologies B.V. Composition copolymère de propylène hétérophasique

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
SER VAN DER VEN: "Studies in Polymer Science", vol. 7, 1990, ELSEVIER, article "Polypropylene and other Polyolefins"

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