WO2011064119A1 - Compositions de polyoléfines ayant une basse température de thermosoudage et un caractère collant à chaud amélioré - Google Patents

Compositions de polyoléfines ayant une basse température de thermosoudage et un caractère collant à chaud amélioré Download PDF

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WO2011064119A1
WO2011064119A1 PCT/EP2010/067479 EP2010067479W WO2011064119A1 WO 2011064119 A1 WO2011064119 A1 WO 2011064119A1 EP 2010067479 W EP2010067479 W EP 2010067479W WO 2011064119 A1 WO2011064119 A1 WO 2011064119A1
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Prior art keywords
propylene
copolymers
alpha
ethylene
butene
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PCT/EP2010/067479
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English (en)
Inventor
Spencer S. Hirata
Michele Grazzi
Giampaolo Pellegatti
Andrea Felisati
Dean J. Spencer
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Basell Poliolefine Italia S.R.L.
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Publication of WO2011064119A1 publication Critical patent/WO2011064119A1/fr

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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/18—Manufacture of films or sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • 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
    • C08L23/14—Copolymers of propene
    • C08L23/142—Copolymers of propene at least partially crystalline copolymers of propene with other olefins
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2323/10—Homopolymers or copolymers of propene
    • C08J2323/14—Copolymers of propene
    • 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
    • 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
    • C08L23/16—Elastomeric ethene-propene or ethene-propene-diene copolymers, e.g. EPR and EPDM rubbers
    • 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
    • C08L23/18—Homopolymers or copolymers of hydrocarbons having four or more carbon atoms
    • C08L23/20—Homopolymers or copolymers of hydrocarbons having four or more carbon atoms having four to nine carbon atoms

Definitions

  • the present invention relates to polyolefm compositions useful in the preparation of heat- sealable films, containing propylene copolymers and other polyolefm components.
  • Copolymers of propylene with other olefins mainly ethylene, butene-1 or both
  • olefins mainly ethylene, butene-1 or both
  • heat-sealable materials are known in the prior art as heat-sealable materials.
  • copolymers are obtained by polymerizing propylene with minor amounts of other olefin comonomers in the presence of coordination catalysts.
  • the polymerized comonomer units are statistically distributed in the resulting copolymer and the melting point of said copolymers results to be lower than the melting point of crystalline propylene homopolymers. Also the seal initiation temperature (as later defined in detail) of the said copolymers results to be favorably low.
  • hot tack is the bonding strength measurable while the polymer in the heat sealed portion of a film is still in the semimolten/solidifying state.
  • relatively high values of hot tack strength are achieved by blending a propylene-butene-1 -ethylene terpolymer with a metallocene catalyzed ethylene polymer.
  • the terpolymer used in the examples contains relatively high amounts of comonomers, namely 1.7 mol% of ethylene and 16.2 mol% of butene-1.
  • the hot tack strength values obtained are lower than 250 g (about 2.5 N). At 210°F (about 99°C) it is lower than 200. It appears to be insufficient at temperatures lower than 200°F (about 93°C).
  • polyolefm compositions comprising (by weight):
  • copolymer includes polymers containing more than one kind of comonomers.
  • C3-C10 ⁇ -olefms are propylene, butene-1, pentene-1, 4-methylpentene-l, hexene-1 and octene-1.
  • component A are the compositions comprising (by weight):
  • a 1 15-80%, preferably 20-60 %, more preferably 20-50%, of one or more copolymers of propylene selected from the group consisting of (A ! l) propylene/ethylene copolymers containing 1-7% of ethylene; (A 1 2) copolymers of propylene with one or more C4-C8 alpha-olefms, containing from 2 to less than 14% of the C4-C8 alpha-olefms; (A 1 3) copolymers of propylene with ethylene and one or more C4-C8 alpha-olefms, containing 0.5-4.5% of ethylene and 2-6% of C4-C8 alpha-olefms, provided that the total content of ethylene and C4-C8 alpha-olefms in (A 1 3) be equal to or lower than 6.5%;
  • a 11 20-85%, preferably 40-80 %, more preferably 50-80%, of one or more copolymers of propylene selected from the group consisting of (A 11 1) copolymers of propylene with one or more C4-C8 alpha-olefms, containing from 14% to 30%, preferably from 14.5% to 25% of C4-C8 alpha-olefms; (A 11 2) copolymers of propylene with ethylene and one or more C4-C8 alpha-olefms, containing 0.5-5% of ethylene and 9-30%> of C4-C8 alpha-olefms.
  • component A) are the compositions comprising (by weight):
  • a 1 from 15% to 60%, preferably from 20% to 60%, more preferably from 20% to 50%, of a copolymer of propylene with C4-C8 alpha-olefm(s), preferably butene, containing more than 10%, preferably 1 1% or more, but less than 14%, more preferably up to 13%- 13.5%), of said C4-C8 alpha-olefm(s);
  • a 11 from 40% to 85%, preferably from 40% to 80%, more preferably from 50% to 80%, of a copolymer of propylene with C4-C8 alpha-olefm(s), preferably butene, containing from 14% to 30%, preferably from 14.5% to 25%, more preferably from 14.5% to 22%, of said C4-C8 alpha-olefm(s), and optionally from 0.5%> to 3% of ethylene;
  • the total content of C4-C8 alpha-olefm(s) in the propylene polymer composition be higher than 10%.
  • compositions and their preparation are disclosed in WO03/031514.
  • the preferred comonomers in the said copolymers or of propylene are ethylene and butene- 1.
  • the MFR (Melt Flow Rate) values for propylene copolymers or propylene copolymer compositions A) range from 0.5 to 15 g/10 min., more preferably 2 to 15 g/10 min., most preferably from 2.5 to 10 g/10 min, measured at 230°C, with 2.16 kg load.
  • the said MFR values can be obtained directly in polymerization, or by subjecting to degradation (for instance by using organic peroxides according to known methods) a precursor polymer or polymer composition having lower MFR values.
  • All the said copolymers of propylene can be prepared by using a Ziegler-Natta catalyst in the polymerization process.
  • chain transfer agents e.g. hydrogen or ZnEt 2
  • chain transfer agents e.g. hydrogen or ZnEt 2
  • Ziegler-Natta catalysts are the supported catalyst systems comprising a trialkylaluminium compound, optionally an electron donor, and a solid catalyst component comprising a halide or halogen-alcoholate of Ti and optionally an electron-donor compound supported on anhydrous magnesium chloride.
  • Catalysts having the above-mentioned characteristics and polymerization processes employing such catalysts are well known in the patent literature; particularly advantageous are the catalysts and polymerization processes described in USP 4,399,054 and EP-A-45 977. Other examples can be found in USP 4,472,524.
  • copolymers of propylene can be blended in the molten state, with conventional apparatuses and techniques, to obtain the previously defined compositions.
  • the said compositions can be obtained directly in polymerization, by carrying it out in at least two sequential steps, wherein the copolymer components are prepared in separate subsequent steps, operating in each step in the presence of the polymer formed and the catalyst used in the preceding step.
  • the homo- or copolymers B) of butene-1 are well known in the art, particularly for their good properties in terms of pressure resistance and creep resistance. Such homo or copolymers are generally prepared by polymerizing butene-1 in the presence of certain Ziegler/Natta catalyst systems.
  • Suited homoplymers B) of butene-1 are linear, semicrystalline, higly isotactic homopolymers (having in particular an isotacticity from 96 to 99%, measured both as mmmm pentads/total pentads using NMR, and as quantity by weight of matter soluble in xylene at 0°C).
  • they Preferably they have a melting point Tm(II) of crystalline form 2 (the first to form, being favoured kinetically) from 81 to 109°C.
  • Suitable copolymers B) of butene-1 are the copolymers preferably containing up to 30 mol. % of olefmic comonomers (in particular ethylene, propylene and Cs-Cs a-olefms, like pentene-1 , hexene-1 and octene-1).
  • olefmic comonomers in particular ethylene, propylene and Cs-Cs a-olefms, like pentene-1 , hexene-1 and octene-1).
  • flexural modulus 80 MPa or higher, in particular 80 to 300 MPa, even more preferably 150 to 300 MPa;
  • Preferred comonomers in the copolymers B) are ethylene and propylene. High MFR values can be obtained by successive treatment of the polymer with organic peroxides.
  • the elastomeric or plastomeric polyolefm or polyolefm composition C) can be any elastomeric or plastomeric polymer or polymer composition commonly used to modify the mechanical properties of polyolefins.
  • plastomeric in the definition of the present invention is used to include the particular class of materials having properties intermediate to those of thermoplastic and elastomeric materials, generally called "plastomers". Said plastomers can have a broad range of densities (up to about 0.925 g/cm 3 ) and a higher crystallinity than the traditional elastomers. Be it an elastomeric or plastomeric material, the said component C) typically has at least one of the following features:
  • ISO 178A Flexural modulus equal to or less than 200 MPa, preferably equal to or less than 170 MPa, most preferably equal to or less than 100 MPa;
  • - X-ray crystallinity from 0 to 40%, more preferably from 0 to 30%.
  • ethylene copolymers containing up to 45% by weight, in particular from 10 to 42% by weight, of an olefin comonomer, preferably a C3-C10 a-olefm, in particular butene-1 or octene-1, and having Shore A hardness of 90 points or less.
  • an olefin comonomer preferably a C3-C10 a-olefm, in particular butene-1 or octene-1, and having Shore A hardness of 90 points or less.
  • propylene copolymers containing up to 40% by weight of an olefin comonomer, preferably ethylene or a C4-C10 a-olefm, and having Shore A hardness of 90 points or less.
  • an olefin comonomer preferably ethylene or a C4-C10 a-olefm, and having Shore A hardness of 90 points or less.
  • the said ethylene copolymers 1) have typically a density from 0.86 to 0.925 g/cm 3 .
  • copolymers 1 Another specific example of copolymers 1) is a copolymer containing 61 wt% of ethylene and 39 wt% of octene-1 (IR analysis), having a hardness of 20 Shore D points and 75 Shore A points, a melting point of 55°C, a density of 0.868 g/cm 3 according to method ASTM D 792 and MFR of 0.5 g/10 min (ASTM D 1238, 190°C/2.16 kg).
  • IR analysis IR analysis
  • copolymers 1 Another specific example of copolymers 1) is a copolymer of ethylene and butene-1, having a hardness of 30 Shore D points, 85 Shore A points, flexural modulus of 22.8 MPa (ASTM D 790), melting point of 60°C and a density of 0.88 g/cm 3 according to method ASTM D 792. It is marketed by Exxon Chemical with the trademark Exact 4033.
  • propylene copolymers 2 are the propylene copolymers containing from 0.1 to 40% by weight, more preferably from 0.1 to 25% by weight of olefin comonomers, in particular ethylene.
  • the said propylene copolymers 2) have typically a density from 0.850 to 0.890 g/cm 3 , in particular from 0.855 to 0.885 g/cm 3 . They generally display no or relatively low degree of crystallinity, indicatively from 0 to 25% when measured as X- ray crystallinity.
  • DSC differential scanning calorimetry
  • Suitable propylene copolymers 2 are the plastomers Vistamaxx® and Versify® made available on the market by ExxonMobil Chemical and Dow Chemical, and the Notio® polymers, made available on the market by Mitsui Petrochemical.
  • the said copolymers 1) and 2) are typically produced by polymerization in the presence of metallocene catalysts.
  • compositions of the present invention have low seal initiation temperatures (preferably lower than 70 °C), high values of hot tack strength (higher than 2.5 N, in particular higher than 2.8 N, at temperatures of 75°C or higer) and good values of haze and gloss.
  • compositions of the present invention are obtainable by melting and mixing the components, and the mixing is effected in a mixing apparatus at temperatures generally of from 180 to 310°C, preferably from 190 to 280°C, more preferably from 200 to 250°C. Any known apparatus and technology can be used for this purpose.
  • melt-mixing apparatus in this context are in particular extruders or kneaders, and particular preference is given to twin-screw extruders. It is also possible to premix the components at room temperature in a mixing apparatus.
  • compositions besides the main components A), B) and C), it is possible to introduce additives commonly employed in the art, such as stabilizing agents (against heat, light, U.V.), plasticizers, antiacids, antistatic and water repellant agents, slip agents, antiblocking agents.
  • stabilizing agents asgainst heat, light, U.V.
  • plasticizers such as plasticizers, antiacids, antistatic and water repellant agents, slip agents, antiblocking agents.
  • compositions of the present invention are particularly useful for the preparation of films.
  • Films are generally characterized by a thickness of less than 100 ⁇ and can be mono- or multilayer.
  • At least one layer comprises the compositions of the present invention.
  • Each layer that does not comprise the compositions of the present invention can be composed of other olefin polymers, such as polypropylene or polyethylene.
  • the films of this invention can be prepared by known techniques, such as extrusion and calendering. Specific examples of films containing the compositions of the present invention are disclosed hereinafter in the test for determining the seal initiation temperature (S.I.T.) and the hot tack.
  • the weight percentage of polymer soluble in xylene at 0°C is then calculated.
  • the percent by weight of polymer insoluble in xylene at room temperature is considered the isotactic index of the polymer.
  • the percentage value of pentad tacticity is the percentage of stereoregular pentads (isotactic pentad) as calculated from the relevant pentad signals (peak areas) in the NMR region of branched methylene carbons (around 27.73 ppm assigned to the BBBBB isotactic sequence), with due consideration of the superposition between stereoirregular pentads and of those signals, falling in the same region, due to the alfa- olefin comonomer .
  • the test is carried out according to the test method described in the experimental section of US4725505. Namely, the open end of the film tube is inserted into a Sentinel heat sealer. The seals are made at increasing temperatures under the following conditions:
  • the hot tack strength is given by the maximum pressure, in inches of water, at which the seal under testing does not peel or creep more than 0.32 cm (1/8 inch).
  • test film specimens 15 mm wide are superimposed in alignment, the adjacent layers being layers of the particular test composition.
  • the seals are made at increasing temperatures (5°C steps) with a J&B Hot tack tester 3000 sealer, equipped with brass teflon coated sealing bars, at one end of the said superimposed specimens along the 15 mm side and the hot tack strength is measured by peeling the specimens at a speed of 100 mm sec.
  • the sealing conditions are:
  • the measurement is carried out on a 50 x 50 mm portion cut from the central zone of the film.
  • the instrument used for the test is a Gardner photometer with Haze-meter UX-10 equipped with a G.E. 1209 lamp and filter C.
  • the instrument calibration is made by carrying out a measurement in the absence of the sample (0% Haze) and a measurement with intercepted light beam (100% Haze).
  • the instrument used for the test is a model 1020 Zehntner photometer for incident measurements.
  • the calibration is made by carrying out a measurement at incidence angle of 60 ° on black glass having a standard Gloss of 96.2% and a measurement at an incidence angle of 45 ° on black glass having a standard Gloss of 55.4%>.
  • Propylene copolymer composition having a MFR of 5.5 g/10 min., prepared according to Example 6 of WO03/031514 and comprising, by weight:
  • the MFR of 5.5 g/10 min. is obtained by thermal treatment with peroxide of the as- polymerized composition, having starting MFR of about 1 g/10 min.
  • Copolymer of butene-1 with 2.5% by weight of ethylene having MFR of 3 g/10 min at 190°C/2.16kg and fiexural modulus of 140 MPa.
  • Copolymer of propylene with ethylene and butene-1 containing 2.5% by weight of ethylene and 6% by weight of butene-1, having a MFR of 6 g/10 min. and melting temperature of 132°C, containing also 1000 ppm of silica as antiblocking agent.
  • Triple-layer films are prepared by coextrusion (using three Bruckner extruders, operating at temperatures of 260°C [melt temperature of the main extruder] and 235°C [melt temperature of the side extruders] and connected to a flat die), said films having an a/b/c structure, wherein layer (b) consists of PP-1, while layer (a) in the films of Examples 1 and 2 consists a blend of components A), B) and C), pre-blended in the solid state, and in the film of Comparison Example 1 of the pure component A), and layer c) consists of PP-2.
  • the film obtained is then bioriented by stretching it 5 times the original length in the machine direction and 8 times in the transversal direction, operating in an oven at 170 °C.
  • the final thickness of the film is 20 ⁇ and the thickness ratio of the layers is 5/90/5.
  • compositions of the present invention provide a satisfactory value of hot tack strength already at 75°C, and that such value undergoes only minor variations in a temperature range from at least 80 to 100°C.

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  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
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Abstract

L'invention porte sur des compositions de polyoléfines comprenant, tous les pourcentages étant en poids : A) de 60 à 94 % d'un ou plusieurs copolymères du propylène contenant de 5 à 25 % d'un ou plusieurs comonomères ; B) de 2 à 20 % d'un ou plusieurs homopolymères ou copolymères du butène-1 ; C) de 1 à 20 % d'une polyoléfine ou composition de polyoléfine élastomère ou plastomère.
PCT/EP2010/067479 2009-11-24 2010-11-15 Compositions de polyoléfines ayant une basse température de thermosoudage et un caractère collant à chaud amélioré WO2011064119A1 (fr)

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US61/281,932 2009-11-24

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2810773A1 (fr) 2013-06-05 2014-12-10 Basell Poliolefine Italia S.r.l. Couche de coeur formée d'un copolymère de butène-1 dans des structures de films multicouches ayant une faible température de soudage et une meilleure adhérence à chaud (hot-tack).
WO2016188982A1 (fr) * 2015-05-26 2016-12-01 Basell Poliolefine Italia S.R.L. Joints d'étanchéité en polyoléfine pour fermetures
WO2017016711A1 (fr) 2015-07-30 2017-02-02 Borealis Ag Composition de polypropylène présentant une meilleure force d'adhérence à chaud
WO2018122031A1 (fr) 2016-12-29 2018-07-05 Borealis Ag Composition de polypropylène combinant une basse température d'initiation d'étanchéité et une température de fusion élevée
WO2018122033A1 (fr) 2016-12-29 2018-07-05 Borealis Ag Composition de polypropylène combinant une basse température d'initiation d'étanchéité et une température de fusion élevée
EP3447088A1 (fr) 2017-08-21 2019-02-27 Borealis AG Composition de polypropylène
WO2019057571A1 (fr) 2017-09-20 2019-03-28 Borealis Ag Composition de polypropylène
WO2019134904A1 (fr) 2018-01-05 2019-07-11 Borealis Ag Composition de polypropylène présentant un comportement de scellage amélioré
WO2022106201A1 (fr) * 2020-11-17 2022-05-27 Basell Poliolefine Italia S.R.L. Composition pelable
RU2813714C2 (ru) * 2018-11-15 2024-02-15 Бореалис Аг Композиция

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EP0045977A2 (fr) 1980-08-13 1982-02-17 Montedison S.p.A. Composants et catalyseurs pour la polymérisation d'oléfines
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
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WO2003031514A1 (fr) 2001-10-09 2003-04-17 BASELL POLIOLEFINE ITALIA, S.p.A. Compositions de copolymere du propylene cristallines dotees d'une capacite d'adherence et de proprietes optiques ameliorees et d'une solubilite reduite
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Cited By (24)

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US11505686B2 (en) 2018-01-05 2022-11-22 Borealis Ag Polypropylene composition with improved sealing behaviour
CN111465648A (zh) * 2018-01-05 2020-07-28 博里利斯股份公司 具有改善的密封性能的聚丙烯组合物
RU2813714C2 (ru) * 2018-11-15 2024-02-15 Бореалис Аг Композиция
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CN116390985A (zh) * 2020-11-17 2023-07-04 巴塞尔聚烯烃意大利有限公司 可剥离组合物
CN116390985B (zh) * 2020-11-17 2024-01-26 巴塞尔聚烯烃意大利有限公司 可剥离组合物

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