Polymer composition suitable for the manufacture of films

Abstract

The present invention relates to a polymer composition comprising at least the following components: A) from 30.0 wt.-% to 80.0 wt.-%, based on the total weight of the polymer composition, of a C2C3 heterophasic copolymer (HECO) produced with a single active site catalyst; wherein the copolymer has a melting point in the range of 150 °C to 162 °C, determined by differential scanning calorimetry according to ISO 11357-3; an MFR2 (230 °C, 2.16 kg) in the range of 5.0 g / 10 min to 40.0 g / 10 min, determined according to ISO 1133; a total C2 content in the range of 1.0 wt.-% to 10.0 wt.-%, based on the total weight of component (A); and a soluble fraction (SF) in the range of 10 wt.-% to 50 wt.-%, determined according to CRYSTEX QC, Polymer Char, as described in the description, based on the total weight of component (A); from 20.0 wt.-% to 70.0 wt.-%, based on the total weight of the polymer composition, of a propylene homopolymer; wherein the propylene homopolymer has an MFR2 (190 °C, 2.16 kg) in the range of 1.0 g / 10 min to 20.0 g / 10 min, determined according to ISO 1133; and a F 30 melt strength of at least 10 cN, determined according to ISO 16790; with the proviso that the weight proportions of components A) and B) add up to 100 wt.-%. Furthermore, the present invention relates to a film comprising the polymer composition of the present invention and to a coated article comprising at least one layer of the polymer composition.

Description

TECHNICAL FIELD

[0001] The present invention relates to a polymer composition comprising a specific C2C3 heterophasic copolymer and a specific propylene homopolymer and to a film and a coated article comprising a layer of said polymer composition. BACKGROUND

[0002] Polypropylene compositions suitable for coating, in particular extrusion coating, are known in the art.

[0003] US 3,418,396 A relates to a polyolefin composition for extrusion, coating and molding various articles, which includes a majority of a mixture comprising: about 40% to 99% by weight of a polypropylene and about 1% to 60% of a polyethylene having a melt index of about 1 dg / min to 15 dg / min, a density greater than about 0.912 g / cc, a melt index recovery greater than 50%, at a flow rate of about 12 dg / min to 120 dg / min.

[0004] US 4,378,451 A refers to a mixture containing a degraded crystalline polypropylene or a propylene-containing copolymer which can be used as an extrusion coating composition. These coated substrates can then be used to make bags and other packaging applications. In particular, the coatings are a mixture of a degraded crystalline polypropylene or a propylene-containing copolymer and a low density polyethylene.

[0005] EP 1 638 695 A1 relates to an extrusion coated substrate whose coating layer comprises polyethylene produced by catalytic polymerization from a single active site catalyst and contains as comonomers ethylene and at least two C4-12 alpha olefins.

[0006] US2014 / 031462 A1 relates to an extrusion process of a blend of an irradiated first propylene polymer and a non-irradiated second propylene polymer, wherein the first propylene polymer comprises a non-phenolic stabilizer. The irradiation of the first propylene polymer extrudate is performed in a reducing oxygen environment and the irradiated first propylene polymer and the non-irradiated second propylene polymer are blended at a temperature below their respective melting points. The blend has a viscosity retention of 20% to 35%.

[0007] EP 2 492 293 A1 relates to a polypropylene composition suitable for extrusion coating or extrusion foaming for a variety of substrates having high melt strength and stretchability, excellent processability, low gel content, and capable of withstanding high temperatures, and to a process for providing such polypropylene composition and extrusion coated or extrusion foamed articles. The polypropylene composition comprises a polypropylene-based resin, wherein the polypropylene-based resin has a MFR2 (2.16 kg, 230°C, ISO 1133) of 5 g / 10 min to 35 g / 10 min and an optical gel index of 1000 or less, measured on a cast film having a film thickness of 70 pm, prepared with a chill roll temperature of 40°C, wherein the polypropylene-based resin has a strain hardening factor (SHF) of 2.3 to 7.0 when measured at a strain rate of 3.0 s1and a Hencky strain of 2.5. The production process of such polypropylene composition is characterized in that a single active site catalyst derived polypropylene intermediate base resin having a MFR2 (2.16 kg, 230°C, ISO 1133) of 6.0 g / 10 min or less is mixed with a peroxide masterbatch composition and an oligomeric diene masterbatch composition to form a pre-mix material; the pre-mix material is melt mixed in a melt mixing device having a barrel temperature in the range of 180°C to 300°C.

[0008] EP 2 877 535 A1 refers to a process for providing a polypropylene composition comprising a branched polypropylene, wherein a polypropylene having a melt flow rate MFR2 (230°C) of more than 1.0 g / 10 min is reacted with a thermally decomposing free radical forming agent and, optionally, with a difunctional unsaturated monomer, thereby obtaining a branched polypropylene, wherein the polypropylene composition has a F 30 melt strength and a melt extensibility v of more than 200 mm / s 30 .

[0009] For film and coating applications, high melt strength is required and, for many applications, also an excellent balance of sealing performance and optical properties. Furthermore, for food applications, a low content of materials extractable in hexane is required. The compositions known in the art do not provide the combination of these properties and / or have a high content of hexane extractables. In general, compositions having low haze and low seal initiation temperature (SIT) are preferred. SUMMARY

[0010] It is therefore an object of the present application to provide a polymer composition with high melt strength, which shows a combination of excellent sealing properties, in particular low SIT and optical properties, in particular low haze. Furthermore, it is an object of the present application to provide a composition which allows to generate films and coated articles with low content of hexane extractables.

[0011] According to claim 1, the polymer composition solving the above mentioned objects comprises at least the following components:

[0012] A) from 30.0 wt.-% to 80.0 wt.-%, based on the total weight of the polymer composition, of a C2C3 heterophasic copolymer (HECO) produced by a single active site catalyst; wherein the copolymer has:

[0013] • a melting point in the range of 150 °C to 162 °C, determined by differential scanning calorimetry according to ISO 11357-3;

[0014] • an MFR2(230 °C, 2.16 kg) in the range of 5.0 g / 10 min to 40.0 g / 10 min, determined according to ISO 1133; and

[0015] • a total C2 content in the range of 1 wt.-% to 10 wt.-%, based on the total weight of component (A); and

[0016] • a soluble fraction (SF) in the range of 10 wt.-% to 50 wt.-%, determined according to CRYSTEX QC, Polymer Char, as described in the description, based on the total weight of component (A);

[0017] B) from 20.0 wt.-% to 70.0 wt.-%, based on the total weight of the polymer composition, of a propylene homopolymer; wherein the propylene homopolymer has:

[0018] • an MFR2(190 °C, 2.16 kg) in the range of 1.0 g / 10 min to 20.0 g / 10 min, determined according to ISO 1133; and

[0019] • a F 30 melt strength;

[0020] with the proviso that the weight proportion of components A) and B) in total is not more than 100 wt.-%.

[0021] Advantageous embodiments of the polymer composition according to the present application are specified in dependent claims 2 to 7. Claim 8 of the present application relates to a film comprising at least one layer comprising the polymer composition of the present application and claims 8 to 11 relate to preferred embodiments of said film. Claims 12 to 13 relate to a coated article comprising at least one layer comprising said polymer composition, claim 14 relates to a method of making said article and claim 15 relates to the use of the coating for a specific end application.

[0022] Definitions

[0023] Quantities

[0024] The polymer composition according to the present application must comprise components (A) and (B) and optionally additive (C). It is required here that the sum of components (A) and (B) and additive (C) if present is 100 % by weight. The fixed ranges of quantities of the individual components (A) and (B) and optionally additive (C) are to be understood in such a way that within the specified ranges any quantity of the individual components can be chosen, provided that the strict requirement is met that the sum of components (A), (B) and optionally additive (C) is 100 % by weight.

[0025] Regio-defects

[0026] The regio-defects of propylene polymers can be divided into three different types, namely 2,1-erythro (2,le), 2,1-threo (2,It) and 3,1 defects. For a detailed explanation of the structure and mechanism of the formation of regio-defects in polypropylene see Chemical Reviews 2000, 100 (4), pages 1316 to 1327. These defects are measured using 13C NMR, the specific measurement method is described in detail below.

[0027] The term "2,1 regio-defects" used in the present application defines the sum of 2,1-erythro defects and 2,1-threo regio-defects. The propylene random copolymer or propylene homopolymer having the quantity of said regio-defects as required according to the present application is typically and preferably produced in the presence of a single site catalyst.

[0028] The catalyst influences the microstructure of the polymer in particular. Thus, the polypropylene produced using a single site metallocene catalyst has a different microstructure compared to polypropylene produced using a Ziegler-Natta (ZN) catalyst. The most significant difference is the presence of regio-defects in the metallocene produced polypropylene, which is not the case for polypropylene produced from Ziegler-Natta (ZN) catalysts.

[0029] A "single site catalyst produced" polymer is a polymer produced in the presence of a single site catalyst.

[0030] The term "comprising", as used in the specification and claims, does not exclude other unmentioned elements or features. The term "consisting essentially of, as used in the specification and claims, is considered synonymous with the term "comprising", for the purposes of the present application. If a group is defined to comprise at least one element, it is also understood to disclose a group consisting of only these elements.

[0031] Whenever the terms "including", "has", "having" or "has" are used, these terms are meant to be equivalent to the term "comprising" as defined above.

[0032] The use of the terms "a" and "the" and "said" and "the" (for example "a", "an" or "the") when used in reference to a singular noun are intended to include the plural form of that noun unless specifically excluded.

[0033] Component (A)

[0034] According to the present application, the polymer composition comprises a component (A) from 30.0 wt-% to 80.0 wt-%, based on the total weight of the polymer composition, of a C2C3 heterophasic copolymer (HECO) prepared from a single active site catalyst; wherein the copolymer has a melting point in the range of 150 °C to 162 °C, determined according to ISO 11357-3 using differential scanning calorimetry; an MFR2(230 °C, 2.16 kg) in the range of 5.0 g / 10 min to 40.0 g / 10 min, determined according to ISO 1133; a total C2 content in the range of 1 wt-% to 10 wt-%, based on the total weight of component (A); and a soluble fraction (SF) in the range of 10 wt-% to 50 wt-%, determined according to CRYSTEX QC, Polymer Char, as described in the experimental part, based on the total weight of component (A).

[0035] Preferred embodiments of component (A) will be discussed in the following.

[0036] It is a preferred embodiment of the present application that component (A) has a melting point in the range of 151 °C to 160 °C, preferably in the range of 151 °C to 155 °C, more preferably in the range of 151 °C to 154 °C, determined according to ISO 11357-3 by differential scanning calorimetry.

[0037] According to another preferred embodiment of the present application, component (A) has an MFR2(230 °C, 2.16 kg) in the range of 10.0 g / 10 min to 30.0 g / 10 min, preferably in the range of 15.0 g / 10 min to 25.0 g / 10 min, more preferably in the range of 20.0 g / 10 min to 23.0 g / 10 min, determined according to ISO 1133.

[0038] According to a further preferred embodiment of the present application, component (A) has a total C2 content in the range of 1.0 wt.-% to 8.0 wt.-%, preferably in the range of 1.5 wt.-% to 6 wt.-%, more preferably in the range of 2.5 wt.-% to 4.0 wt.-%, based on the total weight of component (A).

[0039] In another preferred embodiment of the present application, component (A) has a soluble fraction (SF) in the range of 15 wt.-% to 40 wt.-%, preferably in the range of 20 wt.-% to 30 wt.-%, more preferably in the range of 24 wt.-% to 28 wt.-%, based on the total weight of component (A), and determined according to CRYSTEX QC, Polymer Char, as described in the experimental part.

[0040] According to a further embodiment of the present application, component (A) has a C2 content in the range of 5 wt.-% to 40 wt.-%, preferably in the range of 8 wt.-% to 30 wt.-%, more preferably in the range of 8 wt.-% to 25 wt.-%, even more preferably in the range of 9 wt.-% to 12 wt.-%, based on the total weight of the soluble fraction (SF), and determined according to CRYSTEX QC, Polymer Char, as described in the experimental part.

[0041] According to a further preferred embodiment of the present application, component (A) has a C2 content of the crystalline fraction (CF) of less than 4 wt.-%, preferably less than 2 wt.-%, more preferably in the range of 0 wt.-% to 1 wt.-%, even more preferably 0 wt.-%, based on the total weight of the crystalline fraction (CF), and determined according to CRYSTEX QC, Polymer Char, as described in the experimental part.

[0042] According to a further preferred embodiment of the present application, component (A) has an intrinsic viscosity (IV) of the soluble fraction (SF) in the range of 1.0 dl / g to 5.0 dl / g, preferably in the range of 2.0 dl / g to 4.0 dl / g, more preferably in the range of 2.2 dl / g to 3.4 dl / g, even more preferably in the range of 3.0 dl / g to 3.3 dl / g, determined according to CRYSTEX QC, Polymer Char, as described in the experimental part.

[0043] According to a further preferred embodiment of the present application, component (A) has an intrinsic viscosity (IV) of the crystalline fraction (CF) in the range of 0.5 dl / g to 4.0 dl / g, preferably in the range of 0.8 dl / g to 2.0 dl / g, more preferably in the range of 1.0 dl / g to 1.2 dl / g, determined according to CRYSTEX QC, Polymer Char, as described in the experimental part.

[0044] According to another preferred embodiment of the present application, component (A) has a Tg1 in the range of -10 °C to 10 °C, preferably in the range of -5 °C to 5 °C, more preferably in the range of -2 °C to 2 °C, determined by dynamic mechanical analysis (DMA) according to ISO 6721-7.

[0045] According to another preferred embodiment of the present application, component (A) has a Tg2 in the range of -70 °C to -10 °C, preferably in the range of -45 °C to -20 °C, more preferably in the range of -26 °C to -22 °C, determined by dynamic mechanical analysis (DMA) according to ISO 6721-7.

[0046] According to a further preferred embodiment of the present application, component (A) has a storage modulus G' in the range of 250 MPa to 600 MPa, preferably in the range of 300 MPa to 550 MPa, more preferably in the range of 420 MPa to 470 MPa, determined by dynamic mechanical analysis (DMA) according to ISO 6721-7.

[0047] The glass transition temperature Tg and the storage modulus G' (23 °C) are determined by dynamic mechanical analysis (DMA) according to ISO 6721-7.

[0048] In another preferred embodiment of the present application, component (A) has been produced in the presence of a single active site catalyst of a metallocene catalyst.

[0049] The preferred metallocene catalyst has the formula (I) as shown below.

[0050]

[0051] wherein

[0052] Mt is Hf or Zr;

[0053] each X is a sigma-ligand,

[0054] each R 1 are independently the same or can be different and are CH2-R 7 group, wherein R7is H or a linear or branched C 1-6 -alkyl, C3-8 cycloalkyl, C 6-10 Aryl,

[0055] Each R 2 Independently, it is a -CH=, -CY=, -CH2-, -CHY, or -CY2- group, where Y is C. 1-10 Hydrocarbon group, where n is 2-6.

[0056] Each R 3 and R 4 Independently identical or may be different and is hydrogen, straight-chain or branched C1-C6 alkyl, OY group or C 7-20 Arylalkyl, C 7-20 alkylaryl or C 6-20 aryl, wherein each phenyl group has at least one R 3 and at least one R 4 Not hydrogen, and optionally two adjacent R 3 or R 4 The group can be part of a ring, including the phenyl carbon formed by their combination.

[0057] R 5 It is a straight-chain or branched C1-C6-alkyl, C 7-20 Arylalkyl, C 7-20 alkylaryl or C6-C 20 -Aryl,

[0058] R 6 It is C(R) 8 )3 groups, of which R 8 It is a straight-chain or branched C1-C6 alkyl group.

[0059] Each R is independently C1-C 20 -Hydrocarbon group, C6-C 20 -Aryl, C7-C 20 -Arylalkyl or C7-C 20 -alkylaryl.

[0060] According to another preferred embodiment, the metallocene catalyst has the following formula (II).

[0061]

[0062] Preferred component (A) is prepared in a sequential polymerization process in reactors (R1) and (R2) comprising at least two polymerization reactions, wherein a first polymer fraction a1 is generated in reactor (R1) of the first polymerization reaction, and subsequently transferred to a second polymerization reactor (R2). In the second polymerization reactor (R2), a second polymer fraction a2 is then generated in the presence of the first polymer fraction a1.

[0063] The polymerization process used to produce component (A) typically includes at least two polymerization stages, each of which can be carried out in solution, slurry, fluidized bed, bulk or gas phase.

[0064] The preferred multi-stage process for manufacturing component (A) is the "recycled gas phase" process, such as the process developed by Borealis (known as...). (Technology), which is described in patent documents, such as EP 0 887 379 A1, WO 92 / 12182A1, WO 2004 / 000899 A1, WO 2004 / 111095 A1, WO 99 / 24478 A1, WO 99 / 24479 A1 or WO 00 / 68315 A1. Another suitable slurry vapor phase process is Basell's Process.

[0065] Component (B)

[0066] According to the present invention, the polymer composition comprises a component (B) of propylene homopolymer in the range of 20.0% (by weight) to 70.0% (by weight) of the total weight of the polymer composition; wherein the propylene homopolymer has an MFR2 (190°C, 2.16 kg) in the range of 1.0 g / 10 min to 20.0 g / 10 min as determined according to ISO 1133; and an F of at least 10 cN as determined according to ISO 16790. 30 .

[0067] Preferred embodiments of component (B) will be discussed below.

[0068] According to a preferred embodiment of the invention, component (B) has an MFR2 (230°C, 2.16 kg) in the range of 1.0 g / 10 min to 15.0 g / 10 min, preferably in the range of 3.0 g / 10 min to 15.0 g / 10 min, more preferably in the range of 6.0 g / 10 min to 14.0 g / 10 min, and even more preferably in the range of 8.0 g / 10 min to 12.0 g / 10 min, as determined according to ISO 1133.

[0069] According to another preferred embodiment of the invention, component (B) has an F content of at least 20 cN, preferably at least 30 cN, and more preferably in the range of 30 cN to 60 cN, as determined according to ISO 16790. 30 .

[0070] In a further preferred embodiment of the present application, component (B) has a melt extensibility v measured according to ISO 16790 of at least 200 mm / s, preferably of at least 250 mm / s, more preferably in the range of 250 mm / s to 300 mm / s. 30 .

[0071] According to a further preferred embodiment of the present application, component (B) has a density in the range of 895 kg / m 3 to 920 kg / m 3 , preferably in the range of 900 kg / m 3 to 910 kg / m 3 , more preferably in the range of 904 kg / m 3 to 906 kg / m 3 .

[0072] Polymer composition

[0073] According to a preferred embodiment of the present application, the polymer composition has a MFR2 (230 °C, 2.16 kg) in the range of 4.0 g / 10 min to 30.0 g / 10 min, preferably in the range of 8.0 g / 10 min to 20.0 g / 10 min, more preferably in the range of 12.0 g / 10 min to 16.0 g / 10 min, measured according to ISO 1133.

[0074] Another preferred embodiment provides that the polymer composition has a F 30 .

[0075] According to a further preferred embodiment of the present application, the polymer composition has a melt extensibility v measured according to ISO 16790 of at least 200 mm / s, preferably of at least 230 mm / s, more preferably in the range of 240 mm / s to 300 mm / s, more preferably in the range of 240 mm / s to 260 mm / s. 30 .

[0076] According to a further preferred embodiment of the present application, the polymer composition has a MFR2 (230 °C, 2.16 kg) in the range of 12.0 g / 10 min to 16.0 g / 10 min, measured according to ISO 1133 and a F 30 .

[0077] According to a further embodiment of the present application it is provided that the polymer composition has a xylene soluble (XCS) fraction in the range of 10 % by weight to 20 % by weight, preferably in the range of 12 % by weight to 18 % by weight, more preferably in the range of 14 % by weight to 16 % by weight, determined according to ISO 16152.

[0078] According to a further preferred embodiment of the present application the polymer composition has a flexural modulus in the range of 1000 MPa to 1600 MPa, preferably in the range of 1100 MPa to 1400 MPa, more preferably in the range of 1200 MPa to 1300 MPa, determined according to ISO 178.

[0079] According to a further preferred embodiment of the present application it is provided that the polymer composition has an intrinsic viscosity of the XCS in the range of 2.5 dl / g to 3.6 dl / g, preferably in the range of 2.7 dl / g to 3.3 dl / g, more preferably in the range of 3.05 dl / g to 3.15 dl / g, determined according to DIN ISO 1628 / 1 and / 3.

[0080] According to a further preferred embodiment of the present application the polymer composition has a Charpy notched impact strength in the range of 4 kJ / m 2 to 20 kJ / m 2 , preferably in the range of 4.5 kJ / m 2 to 8 kJ / m 2 , more preferably in the range of 5 kJ / m 2 to 6 kJ / m 2 , determined according to ISO 179 1 eA at 23 °C.

[0081] According to a further preferred embodiment of the present application it is provided that the polymer composition has a haze in the range of 5 % to 60 %, preferably in the range of 40 % to 55 %, more preferably in the range of 45 % to 51 %, determined on a specimen having a thickness of 1 millimeter as described in the experimental part.

[0082] According to a further preferred embodiment of the present application the polymer composition has a content of hexane hot solubles in the range of 2.1 % by weight or below, preferably in the range of 0.5 % by weight to 2.0 % by weight, more preferably in the range of 0.5 % by weight to 1.8 % by weight, more preferably in the range of 1.2 % by weight to 1.6 % by weight, determined according to FDA section 177.1520. Further, it is preferred that the ratio of C6 to FDA / XCS is below 0.20 and more preferably below 0.10.

[0083] A further preferred embodiment of the present application provides that the polymer composition comprises at least one additive C), preferably selected from the group consisting of slip agents, acid scavengers, UV stabilizers, pigments, antioxidants, additive carriers, nucleating agents, and mixtures thereof, wherein these additives are preferably present in an amount of 0.1 % by weight to 5.0 % by weight, and more preferably in an amount of 0.1 % by weight to 4.0 % by weight, based on the total weight of the polymer composition.

[0084] Film

[0085] The present application also relates to a film comprising the polymer composition according to the present application and the polymer composition according to one preferred embodiment.

[0086] A further preferred embodiment of the present application provides that the film has a tensile modulus in the range of 200 MPa to 1000 MPa, preferably in the range of 300 MPa to 700 MPa, more preferably in the range of 400 MPa to 500 MPa, measured on a cast film having a thickness of 50 pm in the machine direction and in the transverse direction at 23 °C according to ISO 527-3.

[0087] According to a further preferred embodiment of the present application, the film has a seal initiation temperature in the range of 100 °C to 140 °C, preferably in the range of 120 °C to 135 °C, more preferably in the range of 120 °C to 132 °C, more preferably in the range of 128 to 130 °C, measured on a cast film having a thickness of 50 pm as described in the experimental part.

[0088] In a further preferred embodiment of the present application, the film has a haze in the range of 5 % to 20 %, preferably in the range of 8 % to 16 %, more preferably in the range of 10 % to 15 %, measured on a cast film having a thickness of 50 pm according to ASTM D1003-00.

[0089] All preferred aspects and embodiments of the above-mentioned composition shall also apply to the film of the present application.

[0090] Coated article

[0091] The present application also relates to a coated article comprising at least one layer comprising the polymer composition of the present application, and preferably consisting of the polymer composition.

[0092] According to one preferred embodiment of the present application, the coated article is an extrusion coated article. Said article can be prepared by every process comprising an extrusion coating step.

[0093] The extrusion coating process can be carried out using conventional extrusion coating techniques. Thus, the composition according to the present application is typically fed into the extrusion device in the form of granules. The polymer melt is preferably transferred from the extruder through a flat die to the substrate to be coated. The coated substrate is cooled on a chill roll and then transferred to a slitter and is wound up.

[0094] The die width is typically dependent on the size of the extruder used. Thus, for a 90 mm extruder, the die width can be in the range of 600 mm to 1200 mm, for a 115 mm extruder the die width can be in the range of 900 mm to 2500 mm, for a 150 mm extruder the die width can be in the range of 1000 mm to 4000 mm, for a 200 mm extruder the die width can be in the range of 3000 mm to 5000 mm. The line speed (downweb speed) is preferably 75 m / min or more, more preferably at least 100 m / min. In most commercial operating machines, the line speed is desirably in excess of 300 m / min or in excess of 500 m / min. Modern machines are designed to run at line speeds up to 1000 m / min, for example 300 m / min to 800 m / min.

[0095] The temperature of the polymer melt is typically between 240 °C and 330 °C. The polypropylene composition according to the present application can be extruded onto the substrate in the co-extrusion process as a single coating or as one or more layers, preferably as the outer layer. In a multi-layer extrusion coating, the polymer layer structure as described above and optionally further layers of other polymers can be co-extruded. If desired or necessary, the ozone and / or corona treatment can be further carried out in a known manner.

[0096] All preferred aspects and embodiments of the above-mentioned composition shall also apply to the coated article according to the present application.

[0097] Use

[0098] The present application also relates to the use of the polymer composition according to the present application, the film or coated article as packaging material, preferably as temperature resistant packaging material for food and / or medical products.

[0099] The present application will now be described with reference to the following non-limiting examples. Specific examples

[0100] Experimental part

[0101] A. Measurement methods

[0102] The following terms and definitions of the determination methods apply to the above general description of the application and to the following examples, unless otherwise defined.

[0103] Melt flow rate

[0104] Melt flow rate (MFR) is determined according to ISO 1133 - Determination of melt mass flow rate (MFR) and melt volumetric flow rate (MVR) of thermoplastics - Part 1: Standard methods, expressed in g / 10 min. MFR is an expression of polymer flowability and therefore also indicates the polymer's processability. A higher melt flow rate generally indicates a lower polymer viscosity. The MFR2 for polypropylene was determined at 230°C and a load of 2.16 kg.

[0105] Quantitative analysis of microstructure (comonomer content and regional defects) using NMR spectroscopy

[0106] Further quantitative nuclear magnetic resonance (NMR) was employed. 光谱 Quantitative analysis was performed on the comonomer content and comonomer sequence distribution of the polymer. Quantitative analysis was conducted in solution using a Bruker Advance III 400NMR spectrometer. 13 C{ 1 ¹H NMR spectra were obtained at 400.15 MHz and 100.62 MHz, respectively. 1 H and 13 C. All spectra are used. 13 A C-optimized 10mm extended temperature probe was used to record all pneumatic devices at 125°C using nitrogen. Approximately 200 mg of material was dissolved in 3 ml of 1,2-tetrachloroethane-d2 (TCE-d2) and chromium-(III)-acetylacetone nickel (Cr(acac)3) to generate a 65 mM relaxant solution in the solvent (Singh, G., Kothari, A., Gupta, V., Polymer Testing 28 5 (2009), 475). To ensure solution homogeneity, the NMR tube was further heated in a rotary roaster for at least 1 hour after initial sample preparation in a heating block. The tube was rotated at 10 Hz after the magnet was inserted. This setup was chosen primarily to obtain the high resolution and accurate ethylene content required for quantification. A standard single-pulse excitation without NOE was employed, using an optimized tip angle, a 1-second cyclic delay, and a dual-level WALTZ16 decoupling scheme (Zhou, Z., Kuemmerle, R., Qiu, X., Redwine, D., Cong, R., Taha, A., Baugh, D. Winniford, B., J. Mag. Reson. 187 (2007) 225; Busico, V., Carbonniere, P., Cipullo, R., Pellecchia, R., Severn, J., Talarico, G., Macromol. Rapid Commun. 2007, 28, 1128). A total of 6144 (6 k) transients were acquired for each spectrum. Quantification was performed using a proprietary computer program.13 C{1H} NMR spectra were integrated and the relevant quantitative properties were determined from the integrals. The chemical shifts of the solvents were used, and all chemical shifts were indirectly referenced to the center methylene of the ethylene block (EEE) at a concentration of 30.00 ppm. This method allows for comparison of references even if this structural unit is not present. Characteristic signals corresponding to ethylene incorporation were observed (Cheng, H. N., Macromolecule 17 (1984), 1950).

[0107] Characteristic signals corresponding to 2,1 erythro regio defects (as described in L. Resconi, L. Cavallo, A. Fait, F. Piemontesi, Chem. Rev. 2000, 100(4), 1253, in Cheng, H. N., Macromolecules, 1984, 17, 1950, and in W-J. Wang and S. Zhu, Macromolecules, 2000, 33 1157) were observed and needed to be corrected for the effect of regio defects on the determination of properties. Characteristic signals corresponding to other types of regio defects were not observed.

[0108] Comonomer fractions were quantified using the method of Wang et al. (Wang, W-J., Zhu, S., Macromolecule 33 (2000), 1157) by integrating 13 C{ 1 signals over the entire spectral region in the1H spectrum. This method was chosen for its robust nature and ability to account for the presence of regio defects when needed. The integration regions were slightly adjusted to improve applicability over the entire range of comonomer contents encountered. For systems where only isolated ethylene in PPEPP sequences is observed, the method of Wang et al. was modified to reduce the effect of non-zero integrals for sites known to be absent. This method reduces overestimation of ethylene content for such systems and is accomplished by reducing the number of sites used to determine absolute ethylene content:

[0109] E = 0.5 (Sββ + Sβγ + Sβδ + 0.5 (Sαβ + Sα))

[0110] By using this set of sites, the corresponding integral equation becomes:

[0111] E = 0.5 (I H + I G + 0.5 (I C + I D ))

[0112] The same notation as in the article of Wang (Wang, W-J., Zhu, S., Macromolecule 33 (2000), 1157) and others is used. The equation for the absolute propylene content is not modified.

[0113] Molar percentage comonomer incorporation is calculated from the mole fraction:

[0114] E [wt%] = 100 * (fE * 28.06) / ((fE * 28.06) + ((1 - fE) * 42.08)).

[0115] Molar percentage comonomer incorporation is calculated from the mole fraction: E [wt%] = 100 * (fE * 28.06) / ((fE * 28.06) + ((1 - fE) * 42.08)).

[0116] The tri-level comonomer sequence distribution is determined using the analytical method of Kakugo et al. (Kakugo, M., Naito, Y., Mizunuma, K., Miyatake, T Macromolecule 15 (1982) 1150). This method is chosen for its robust nature and slightly adjusted integration area to increase applicability to a broader comonomer content.

[0117] Xylene solubles (XCS, %wt)

[0118] The xylene solubility (XCS) fraction as defined and described in the present invention is determined according to ISO 16152 as follows: 2.0 g of polymer is dissolved in 250 ml of p-xylene at 135 °C under stirring. After 30 minutes, the solution is cooled down for 15 minutes at ambient temperature and then settled for 30 minutes at 25 + / - 0.5 °C. The solution is filtered with filter paper into two 100 ml flasks. The solution from the first 100 ml container is evaporated under a nitrogen stream and the residue is dried under vacuum at 90 °C until a constant weight is reached. The xylene solubility fraction (percent) can then be determined as follows:

[0119] XCS % = (100 * m * V0) / (m0 * v);

[0120] m0 = initial polymer amount (g);

[0121] m = residue weight (g);

[0122] V0 = initial volume (ml);

[0123] v = volume of the analyzed sample (ml).

[0124] DSC analysis, melting (Tm) and crystallization temperature (Tc)

[0125] Data were measured using a TA Instrument Q2000 differential scanning calorimetry (DSC) on 5 to 7 mg samples. DSC was run according to ISO 11357 / Part 3 / Method C2 in a heat / cool / heat cycle with a scan rate of 10 °C / min in the temperature range of -30 to +225 °C.

[0126] The crystallization temperature (Tc) and the crystallization enthalpy (Hc) were determined from the cooling step. c The melting temperature (Tm) and the melting enthalpy (Hm) were determined from the second heating step. c m m

[0127] The seal initiation temperature (SIT)

[0128] This method determines the sealing temperature range (seal range) of polypropylene films, especially blown or cast films. The sealing temperature range is the temperature range in which the film can be sealed according to the following conditions. The lower limit (seal initiation temperature (SIT)) is the sealing temperature at which a seal strength of 5 + / - 0.5 N is reached. The upper limit (seal end temperature (SET)) is reached when the film sticks to the sealing device. The seal range is determined on a J&B model 3000 universal sealer, which produces films of 50 pm thickness on a three-layer cast film co-extrusion line, as described below, and with the following further parameters:

[0129] Sample width: 25 mm

[0130] Sealing pressure: 0.67 N / mm2

[0131] Sealing time: 1 sec

[0132] Cooling time: 30 sec

[0133] Peeling speed: 42 mm / sec

[0134] Starting temperature: 80 °C

[0135] End temperature: 150 °C

[0136] Increment: 5 °C

[0137] The samples were sealed A to A at each sealing bar temperature and the seal strength (force) was determined at each step. The seal strength of 5 + / - 0,5 N was reached.

[0138] Tensile modulus (TM)

[0139] ​​​As described below, the tensile modulus in the machine direction (MD) and transverse direction (TD) was determined according to ISO 527-3 at 23°C on a 50 μm cast film. For the linear modulus range, the crosshead speed was 1 mm / min, and for higher deformations, the test was performed at a speed of 10 mm / min.

[0140] Haze

[0141] The haze of a 50 μm thick cast film (reported as haze (film)) or a 1 mm thick injection molded sample (reported as haze (1 mm)) was determined according to ASTM D1003-00. A 60*60*1 mm film was used. 3 The test specimens were prepared according to EN ISO 1873-2.

[0142] F 30 Melt strength and v 30 Melt extensibility

[0143] The tests described herein follow ISO 16790:2005. The strain hardening behavior was determined by the method described in the article "Rheotens - Mastercurves and Drawability of Polymer Melts", MH Wagner, Polymer Engineering and Science, Vol. 36, pp. 925-935. The strain hardening behavior of the polymer was determined using a Rheotens apparatus (…). The analysis was conducted at Siemensstr. 2, 74711 Buchen, Germany, where molten strands were elongated at a defined acceleration. The Rheotens experiment simulates industrial spinning and extrusion processes. In principle, the melt is pressed or extruded through a circular die, and the resulting strand is dragged away. The stress on the extrudate is recorded as a function of melt characteristics and measured parameters (particularly the ratio between output and traction speeds, which is essentially a measure of elongation). For the results given below, the material was extruded using a laboratory extruder, the HAAKE Polylab system, and a gear pump with a cylindrical die (L / D = 6.0 / 2.0 mm). The gear pump was pre-adjusted for a strand extrusion rate of 5 mm / s, and the melt temperature was set to 200 °C. The length of the rotating thread between the die and the rotating wheel was 80 mm. At the start of the experiment, the take-up speed of the Rheotens wheel was adjusted to the speed at which the polymer strand was extruded (tension zero). The experiment was then initiated by slowly increasing the take-up speed of the Rheotens wheel until the polymer thread broke. The wheel acceleration was small enough that the tension could be measured under quasi-steady conditions. The acceleration of the molten strand is 120 mm / sec 2The Rheotens was used in combination with the PC program EXTENS. This is a real-time data acquisition program that displays and stores the measured data of the draw force and the draw-down speed. The end point of the Rheotens curve (force vs. pulley rotation speed) is used as F 30 Melt strength and tensile property values.

[0144] Crystallinity and soluble fraction, comonomer content and intrinsic viscosity

[0145] The polypropylene (PP) compositions were analyzed by CRYSTEX QC, Polymer Char (Valencia, Spain) for the crystalline fraction (CF) and soluble fraction (SF) and the comonomer content and intrinsic viscosity (IV) of each fraction. The crystalline and amorphous fractions were separated by temperature cycling dissolution at 160 °C, crystallization at 40 °C and redissolution at 160 °C in 1,2,4-trichlorobenzene (1,2,4-TCB). The quantification of the SF and CF and the determination of the ethylene content (C2) were achieved by an infrared detector (IR4) and an online 2-capillary viscometer for the determination of the intrinsic viscosity (IV). The IR4 detector is a multi-wavelength detector for the detection of the infrared absorbance in two different wave bands (CH3 and CH2) for the determination of the concentration and the ethylene content in ethylene-propylene copolymers. The IR4 detector was calibrated with a series of 8 EP copolymers with known ethylene content in the range of 2 wt% to 69 wt% (determined by 13C-NMR spectroscopy) and a concentration between 2 and 13 mg / ml for each EP copolymer used for calibration. By XS calibration, the amount of soluble fraction (SF) and crystalline fraction (CF) is related to the amount of “xylene cold solubles” (XCS) and xylene cold insoluble (XCI) fraction, which is determined according to the standard gravimetric method of ISO 16152. The XCS calibration was achieved by testing various EP copolymers with XS content in the range of 2 to 31 wt%. The intrinsic viscosity (IV) of the parent EP copolymers and their soluble and crystalline fractions was determined using an online 2-capillary viscometer and correlated to the corresponding IV determined by standard methods according to ISO 1628 in decalin. The calibration was performed using various EP PP copolymers with IV = 2 to 4 dl / g. The PP composition sample to be analyzed was weighed with a concentration of 10 mg / ml to 20 mg / ml. After automatic filling of the vials with 1,2,4-TCB containing 250 mg / l of 2,6-tert-butyl-4-methylphenol (BHT) as antioxidant, the sample was dissolved at 160 °C until complete dissolution, usually for a time of 60 minutes with constant stirring at 800 rpm. A volume of the sample solution was injected into a chromatographic column filled with an inert carrier, the sample was crystallized and the soluble fraction was separated from the crystalline fraction. This procedure was repeated twice. During the first injection, the whole sample was measured at high temperature to determine the IV [dl / g] and C2 [% (w)] of the PP composition. During the second injection, the soluble fraction (at low temperature) and the crystalline fraction (at high temperature) were measured with the crystallization cycle (% (w) SF, % (w) C2, IV). EP denotes ethylene propylene copolymer. PP denotes polypropylene.

[0146] Hexane hot solubles (C6 FDA, % (w))

[0147] FDA section 177.1520

[0148] The polymer film of 1 g of 50 pm thickness described in the experimental part was added to 400 ml of hexane at 50°C for 2 hours while stirring with a reflux cooler. After 2 hours, the mixture was immediately filtered on filter paper N°41. The precipitate was collected in an aluminum recipient and the residual hexane was evaporated in a steam bath under N2 flow.

[0149] The amount of hexane solubles was determined by the following formula:

[0150] ((sample weight + container weight) - (container weight)) / (sample weight) * 100.

[0151] Glass transition temperature (Tg) and storage modulus (G')

[0152] The glass transition temperature Tg and the storage modulus G' (23°C) were determined by dynamic mechanical analysis (DMA) according to ISO 6721-7. The measurements were performed in torsion mode on compression molded samples (40 x 10 x 1.0 mm 3 ) from -100°C to +150°C with a heating rate of 2°C / min and a frequency of 1 Hz.

[0153] Intrinsic viscosity

[0154] The intrinsic viscosity was determined according to DIN ISO 1628 / 1 and / 3, October 1999 (135°C in Decalin). The intrinsic viscosity (IV) value increases with the increase of the polymer molecular weight.

[0155] Flexural modulus

[0156] The flexural modulus was determined according to ISO 178. The samples had dimensions of 80*10*4.0 mm 3 (length* width* thickness) and were prepared by injection molding according to EN ISO 1873-2. The span length between the supports was 64 mm and the test speed was 2 mm / min.

[0157] Charpy notched impact strength

[0158] The Charpy notched impact strength was determined according to ISO 179 1 eA at 23°C using 80*10*4 mm3test bars injection molded according to EN ISO 1873-2 at 23°C.

[0159] B. Materials used

[0160] AO is Irgafos® 168 from BASF B 215 (synergistic processing and long-term heat stabilizer system. It is a blend of Irgafos® 168 and Irganox® 1010). 1010).

[0161] ​CaSt is calcium stearate, commercially available as CEASIT AV FI under the trade name.

[0162] Improvement of reactivity of LCB PP (component B)

[0163] The base polymer used was a propylene homopolymer with MFR2of 0.23 g / 10 min, produced by Borealis with Advant Z N180M and a single loop reactor. The final MFR2was adjusted by using H2applying methods known to the person skilled in the art. The typical polymerization reaction setup used was as follows: reactor temperature 70 °C, 125 ppm H2, Teal / C3 180 g / t C3, Teal / donor 6 / 1 % (wt) / % (wt).

[0164] The reactivity modification of the polymer powder was performed according to the procedure described in EP 2520425. Butadiene (BD) and peroxide (POX) were pre-mixed with the polymer powder at a temperature of 65 °C before the melt-mixing step, then the pre-mixture was stirred with a paddle stirrer in a horizontal mixer at a temperature of 65 °C, maintaining an average residence time of 15 minutes. The pre-mixture was transferred under inert atmosphere into a Theyson twin-screw extruder of the type TSK60 with a barrel diameter of 60 mm, L / D ratio of 48, equipped with a high intensity mixing screw with three folding zones and a two-step degassing device. The melt temperature profile was chosen with an initial temperature of the feeding zone T1= 240 °C, the maximum temperature of the last folding zone T2= 280 °C, the final temperature of the die zone T3= 230 °C, all temperatures defined as barrel temperature. The screw rotation speed was set to 350 rpm. The formulation was 0.45 % (wt) TRIGONOX BPIC-C75, 0.1 % (wt) BD, 0.13 % (wt) AO and 0.1 % (wt) CaSt. The density of the LCB PP was determined according to ISO 1183 as 905 kg / m 3 , the melt flow rate (230 °C / 2.16 kg) was determined according to ISO 1133 as 10 g / 10 min, the F 30 = 31.2 cN and the v 30 = 266 mm / s, determined according to ISO 16790.

[0165] The polypropylene (PP HECO1, heterophasic propylene random copolymer) was produced as follows.

[0166] PP HECO1 catalyst system

[0167] Catalyst complex

[0168] The following metallocene complexes have been used as described in WO 2019 / 179959 in IE2.

[0169] Preparation of MAO-silica support

[0170] A steel reactor equipped with a mechanical stirrer and a filter screen was flushed with nitrogen 10 and the reactor temperature was set to 20°C. Next, silica grade DM-L-303 from AGC Si-Tech Co, pre-calcined at 600°C (5.0 kg), was added from a feed tank and the reactor was carefully pressurized and depressurized using a hand valve. Then toluene (22 kg) was added. The mixture was stirred for 15 minutes. Next a solution of MAO in toluene (9.0 kg) from Lanxess at 30% (wt) was added over 70 minutes through a feed line at the top of the reactor. The reaction mixture was then heated to 90°C and stirred at this temperature for another two hours. The slurry was allowed to settle and the mother liquor was filtered off. The catalyst was washed twice with toluene (22 kg) at 90°C and then settled and filtered. The reactor was cooled to 60°C and the solid was washed with heptane (22.2 kg). Finally the MAO-treated Si02was dried at 60°C under a stream of nitrogen for 2 hours and then stirred dry under vacuum (-0.5 bar) for 5 hours. The MAO-treated support was collected as a free-flowing white powder and was found to contain 12.2% (wt) Al.

[0171] Single active site catalyst system preparation

[0172] A 20% (wt) solution of MAO in toluene (0.7 kg) was added at 20°C to a steel nitrogen-purged reactor via a burette. Then toluene (5.4 kg) was added with stirring. The metallocene complex (93 g) as described above was added from a metal cylinder followed by a 1 kg rinse with toluene. The mixture was stirred at 20°C for 60 minutes. Then triphenylmethyl tetrakis(pentafluorophenyl)borate (91 g) was added from a metal cylinder followed by a 1 kg rinse with toluene. The mixture was stirred at room temperature for 1 hour. The resulting solution was added to the stirred filter cake of the MAO-silica support prepared as described above over 1 hour. The filter cake was allowed to stand for 12 hours and then dried under a stream of nitrogen at 60°C for 2 hours and stirred dry under vacuum (-0.5 bar) for 5 hours.

[0173] The polymerization reaction for the inventive polymer, PP HECO1, was carried out in a Borstar pilot plant, which was set up with 3 reactors (loop - gas phase reactor (GPR1) - gas phase reactor (GPR2) and a prepolymerizer), using the catalyst system as described above.

[0174] Table 1 gives the polymerization reaction conditions for PP HECO1 and the final properties of the resin.

[0175] Table 1: Polymerization reaction conditions for PP HECO1 and final properties.

[0176]

[0177]

[0178] The process for the preparation of the polypropylene (PP HECO2, heterophasic propylene random copolymer) is described in WO 2016 / 066453 A2. According to WO 2016 / 066453 A2, PP HECO2 is CE2 (catalyst (Ziegler-Natta catalyst) see page 36, polymerization conditions see table 4 page 39. The polymer powders (PP HECO1 and PP HECO2) were mixed in a Coperion ZSK 57 co-rotating twin-screw extruder at 220 °C, the formulation is shown in table 2.

[0179] C. Manufacture of films

[0180] The cast films according to the inventive example (IE1) and the comparative examples (CE1 and CE2) were manufactured on a Collin 30 cast film line with a melt temperature of 240 °C and a chill roll temperature of 20 °C. The total thickness of the obtained films was 50 pm in each case.

[0181] D. Results and discussion

[0182] Table 2: Compositions, films and properties

[0183]

[0184] n.m. = not measured; n.a. = not applicable; * used as carrier for AO and CaSt.

[0185] 1 C6 FDA / XCS is the ratio between C6 FDA and XCS

[0186] As can be seen from table 2, the polymer composition prepared according to the inventive example IE1 using a single active site catalyst has a clear long chain branching (LCB) phenomenon, which is indicated by the F 30 Melt strength and v 30 Another advantage obtained by the addition of component (B) in the inventive example is the stiffness of the polymer composition (1272 MPa vs. 730 MPa), with only a slight loss in toughness (5.3 kJ / m 2 5.8 kJ / m 2 ) for the comparative example 1, while the toughness of the polymer composition according to CE1 is reduced by about 80% (7.1 kJ / m 2 33 kJ / m 2, see relevant information for CE2 in WO 2016 / 066453 A2). The polymer composition according to IE also has a higher purity and a lower extractables. This is reflected in the total extractables (C6 FDA) as well as the ratio between C6 FDA and XCS. Furthermore, the film made from the polymer composition of the present invention shows very low haze, very good seal initiation temperature, as well as an excellent balance between melt strength and haze.

Claims

1. A polymer composition comprising at least the following components: (A) from 30.0 wt% to 80.0 wt%, based on the total weight of the polymer composition, of a C2C3 heterophasic copolymer made from a single active site catalyst; wherein, said copolymer having • a melting point in the range of 150 °C to 162 °C as determined by differential scanning calorimetry according to ISO 11357-3; • an MFR2 in the range of 5.0 g / 10 min to 40.0 g / 10 min as determined according to ISO 1133 at 230 °C, 2.16 kg load; • a total C2 content in the range of 1.0 % (by weight) to 10.0 % (by weight) based on the total weight of component (A); and • a soluble fraction in the range of 10 % (by weight) to 50 % (by weight) as determined according to CRYSTEX QC, Polymer Char based on the total weight of component (A); (B) 20.0 % (by weight) to 70.0 % (by weight) of a propylene homopolymer based on the total weight of the polymer composition; wherein the propylene homopolymer has • an MFR2 in the range of 1.0 g / 10 min to 20.0 g / 10 min as determined according to ISO 1133 at 230 °C, 2.16 kg load; and • F of at least 10 cN determined according to ISO 16790 30 melt strength; with the proviso that the sum of the weight proportions of components (A) (B) is less than or equal to 100 % (by weight).

2. The polymer composition according to claim 1, characterized in that component (A) has a melting point in the range of 151 °C to 160 °C as determined by differential scanning calorimetry according to ISO 11357-3; and / or component (A) has an MFR2 in the range of 10.0 g / 10 min to 30.0 g / 10 min as determined according to ISO 1133 at 230 °C, 2.16 kg load; and / or component (A) has a total C2 content in the range of 1.0 % (by weight) to 8.0 % (by weight) based on the total weight of component (A); and / or component (A) has a soluble fraction in the range of 15.0 % (by weight) to 40.0 % (by weight) as determined according to CRYSTEX QC, Polymer Char based on the total weight of component (A).

3. The polymer composition according to claim 1 or 2, characterized in that component (A) has a C2 content of the soluble fraction in the range of 5 % (by weight) to 40 % (by weight) as determined according to CRYSTEX QC, Polymer Char based on the total weight of the soluble fraction; and / or component (A) has a C2 content of the crystalline fraction of less than 4 % (by weight) as determined according to CRYSTEX QC, Polymer Char based on the total weight of the crystalline fraction; and / or component (A) has an intrinsic viscosity of the soluble fraction in the range of 1.0 dl / g to 5.0 dl / g as determined according to CRYSTEX QC, Polymer Char; and / or Component (A) has an intrinsic viscosity of the crystalline fraction in the range of 0.5 dl / g to 4.0 dl / g determined according to CRYSTEX QC, Polymer Char.

4. The polymer composition according to claim 1 or 2, characterized in that Component (B) has a MFR2 in the range of 1.0 g / 10 min to 15.0 g / 10 min determined according to ISO 1133 at 230 °C, 2.16 kg load; and / or Component (B) has a F of at least 20 cN determined according to ISO 16790 30 melt strength; and / or Component (B) has a v of at least 200 mm / s determined according to ISO 16790 30 melt extensibility; and / or Component (B) has a density in the range of 895 kg / m 3 to 920 kg / m 3 determined according to ISO 1183.

5. The polymer composition according to claim 1 or 2, characterized in that The polymer composition has a MFR2 in the range of 4.0 g / 10 min to 30.0 g / 10 min determined according to ISO 1133 at 230 °C, 2.16 kg load; and / or The polymer composition has a F 30 melt strength; and / or The polymer composition has a v 30 Melt extensibility.

6. The polymer composition according to claim 1 or 2, characterized in that, Component (A) is produced in the presence of a metallocene catalyst.

7. The polymer composition according to claim 1 or 2, characterized in that The polymer composition comprises at least one additive (C) selected from the group consisting of slip agents, acid scavengers, UV stabilizers, pigments, antioxidants, carriers, nucleating agents and mixtures thereof, wherein these additives are present in the range of 0.1 % by weight to 5.0 % by weight, based on the total weight of the polymer composition.

8. A film comprising the polymer composition according to any one of claims 1 to 7.

9. The film according to claim 8, characterized in that The film has a tensile modulus in the range of 200 MPa to 1000 MPa determined according to ISO 527-3 on a cast film having a thickness of 50 pm in machine direction and transverse direction at 23 °C.

10. The film according to claim 8 or 9, characterized in that The film has a seal initiation temperature in the range of 100 °C to 140 °C determined on a cast film having a thickness of 50 pm.

11. The film according to claim 8 or 9, characterized in that The film has a haze in the range of 5 % to 20 % determined according to ASTM D1003-00 on a cast film having a thickness of 50 pm.

12. A coated article comprising at least one layer comprising the polymer composition according to any one of claims 1 to 7.

13. The coated article of claim 12, wherein, The article is an extrusion coated article.

14. A process for manufacturing a coated article according to claim 12, the process comprising an extrusion coating step.

15. Use of the coated article according to claim 12 or 13 as a packaging material.

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