POLYOLEFIN MIXTURE CONTAINING AMORPHOUS POLYALPHAOLEFINS

Abstract

The present invention relates to a mixture containing at least two different polyolefins, characterized in that it contains as an additional constituent an amorphous polyalphaolefin based on the monomers ethene, propene, and 1-butene, having a viscosity at 190 °C of 200 mPa·s to 200,000 mPa·s, wherein it contains polyethylene and polypropylene as at least two different polyolefins, and wherein the polyethylene has a melt flow index (MFI 2.16 kg at 190 °C) determined according to the ISO 1133 procedure described herein of less than 10 g / 10 min, preferably from 0.01 to 2 g / 10 min, and the polypropylene has a melt flow index (MFI 2.16 kg at 230 °C) determined according to the procedure described herein of less than 50 g / 10 min, preferably from 0.01 to 25 g / 10 min. a process for producing such mixtures and the use thereof.

Description

POLYOLEFIN MIXTURE CONTAINING AMORPHOUS POLYALPHAOLEFINS The present invention relates to a mixture containing at least two different polyolefins, characterized in that it contains as an additional constituent an amorphous polyalphaolefin based on the monomers ethene, propene, and 1-butene, having a viscosity at 190 °C, measured according to the procedure described herein, of 200 mPa·s to 200,000 mPa·s. The mixture contains polyethylene and polypropylene as at least two different polyolefins, and the polyethylene has a melt flow index (MFI 2.16 kg at 190 °C), determined according to the ISO 1133 procedure described herein, of less than 10 g / 10 min, preferably from 0.01 to 2 g / 10 min, and the polypropylene has a melt flow index (MFI 2.16 kg at 230 °C), determined according to the procedure described herein, of less than 50 g / 10 min, preferably from 0.01 to 25 g / 10 min, to a process for producing said mixtures and to the use thereof. Polyolefins, especially homo- and copolymers of the polyethylene, polypropylene, and polybutene classes, constitute the largest class of commonly used plastics and account for the highest production volumes worldwide. The substantial applications of these materials include films, packaging, and a very wide variety of injection-molded parts, for example, for automotive manufacturing. Particularly in automotive manufacturing, it is important to produce these injection-molded parts with a well-balanced combination of strength and impact resistance to ensure the best possible everyday usability. To ensure this balance, it is common practice to use mixtures comprising one component designed to guarantee strength, typically crystalline polypropylene, and another component designed to guarantee impact resistance, often a polyethylene-rich component. The latter component is often rubber-like and also sticky, and therefore its proportion in the production process cannot be increased as desired, since doing so would render the mixture unusable due to rubberization of parts of the plant. In order to increase the quality of heterophasic polymer blends, particularly those comprising polyethylene and polypropylene, additives are often used to compatibilize the polypropylene matrix, which has a crystalline structure responsible for strength, with the soft, polyethylene-rich fraction that absorbs the CRPbnn / zznz / B / YiAi impacts. EP 0884353 A1 describes a synergistic composite composition comprising an ethylene / propylene random copolymer and an ethylene / α-olefin random copolymer having a low to very low density, wherein the α-olefin contains at least four carbon atoms. It further refers to polyolefin compositions, particularly polypropylene compositions, comprising the composite composition. The ethylene / α-olefin random copolymer has an MFI of 0.1 to 30 dg / min. US patent 2018134884 A1 describes the use of C3-C2 block copolymers and styrene-ethylene-butylene-styrene (SEBS) rubber components having an MFI of no more than 30 dg / min. US patent 2019218383 A1 describes polymer compositions comprising 1% to 30% by weight of a copolymer obtainable by the reaction of ethylene with an α-olefin having 3 to 10 carbon atoms. The copolymer has an MFI of 100 to 2,000 dg / min and a molecular weight distribution (MWD) between 1 and 5. WO 2011 / 119486 A1 describes the production of an “impact modified” polyolefin-based (PP or HDPE) mixture by using an ethyleneα-olefin copolymer having an MWD well below 5. CA 2102542 A1 describes a gas-phase process for producing a C2-C3 copolymer with a maximum MFI of 500 and mentions that the material is obtained in a "non-sticky" form downstream of the gas-phase reactors. It further describes a high rubber content in the process as a problem. In recent times there has been an additional need to be able to process recycled materials containing polypropylene and / or polyethylene into mixtures that after processing have material characteristics similar to those that can be obtained by using virgin polyethylene and / or polypropylene. Therefore, the problem addressed by the present invention was to provide polyolefin blends that would solve one or more of the problems mentioned above. CRebnn / zznz / E / YiAi Surprisingly, it was found that mixtures containing at least two different polyolefins that contain as an additional constituent an amorphous polyalphaolefin that is based on the monomers ethene, propene and 1-butene and has a viscosity at 190 °C of 200 mPa*s to 200,000 mPa*s can solve one or more of the problems listed. Therefore, the present invention provides mixtures containing at least two different polyolefins, characterized in that they contain as an additional constituent an amorphous polyalphaolefin (APAO) based on the monomers ethene, propene, and 1-butene, having a viscosity at 190°C determined according to the procedure reported below in the measurement procedures section of 200 mPa·s to 200,000 mPa·s, wherein they contain polyethylene and polypropylene as at least two different polyolefins, and wherein the polyethylene has a melt flow index (MFI 2.16 kg at 190°C) determined according to the ISO 1133 procedure reported in the description of less than 10 g / 10 min, preferably from 0.01 to 2 g / 10 min, and the polypropylene has a melt flow index (MFI 2.16 kg at 230°C) determined according to the procedure reported in the description of less than 50 g / 10 min, preferably 0.01 to 25 g / 10 min. The present invention further provides a process for producing a mixture according to the invention and using the same as defined in the claims and described more particularly below. The mixtures according to the invention have the advantage of exhibiting improved material characteristics. In particular, the mixtures according to the invention show good / improved impact resistance and good / improved expansion behavior with a moderate loss of tensile strength. Another advantage of the blends according to the invention is that they show good polyethylene and polypropylene phase compatibility when polyethylene and polypropylene are present as different polyolefins. Due to the use of APAO, the mixtures according to the invention can also contain larger quantities of recycled material, in particular recycled polyethylene and / or propylene, without the material characteristics deteriorating to the point that the material is no longer usable for the intended purpose. Currently, the separation of polymer waste often still does not work in a single way, so, for example, PE recyclables still contain small amounts of impurities. CRPbnn / zznz / B / YiAi quantities of PP polymers and PP recyclables still contain small amounts of PE polymers. Especially for mixtures containing such recyclables that are not monovarietal, the use according to the APAO invention is particularly advantageous. The mixtures according to the invention, the process according to the invention, and the use of the mixtures according to the invention are described below by way of example, without the intention that the invention is limited to these illustrative embodiments. Where ranges, general formulas, or classes of compounds are specified below, they are intended to comprise not only the corresponding ranges or groups of compounds explicitly mentioned, but also all subranges and subgroups of compounds that can be obtained by eliminating individual values ​​(ranges) or compounds. Where documents are cited in the context of this description, their content forms an integral part of the disclosure of the present invention, particularly with respect to the matters referred to therein.When figures are given below as percentages, these figures are weight percentages unless otherwise stated. When averages, for example, molar mass averages, are reported below, these are numerical averages unless otherwise stated. When material characteristics, such as viscosities or the like, are reported below, these are material characteristics at 25°C unless otherwise stated. When chemical (empirical) formulas are used in the present invention, the reported indices may be absolute numbers or average values. For polymeric compounds, the indices preferably represent average values. The mixtures according to the invention containing at least two different polyolefins are characterized in that they contain as an additional constituent an amorphous polyalphaolefin based on the monomers ethene, propene, and 1-butene and having a viscosity at 190 °C, determined according to the procedure reported below in the measurement procedures section, of 200 mPa·s to 200,000 mPa·s, preferably from 1,000 to 150,000 mPa·s, more preferably from 2,000 to 100,000 mPa·s, and particularly preferably from 3,000 to 50,000 mPa·s, wherein it contains polyethylene and polypropylene as at least two different polyolefins, and wherein the polyethylene has a melt flow index [MFI 2.16 kg at 190 °C] determined according to the ISO 1133 procedure reported in the description of less than 10 g / 10 min, preferably 0.01 to 2 g / 10 min, and polypropylene has a melt flow index [MFI 2.16 kg CRPbnn / zznz / E / YiAi at 230 °C] determined according to the procedure reported in the description of less than 50 g / 10 min, preferably 0.01 to 25 g / 10 min. As the at least two different polyolefins, the blend according to the invention preferably contains polyethylene and polypropylene. The proportion of the minor polyolefin in the blend is preferably from 1% to 45% by weight, more preferably from 2% to 30% by weight, and particularly preferably from 5% to 20% by weight, and the proportion of the major polyolefin in the blend is preferably from 55% to 99% by weight, more preferably from 70% to 98% by weight, and particularly preferably from 80% to 95% by weight, based on the total mass of the at least two different polyolefins present in the blend. The aforementioned proportions are especially preferred when the at least two different polyolefins are partially or completely recycled. It may be advantageous for at least one of the two different polyolefins to be at least partially, preferably to an extent of more than 50% by weight and more preferably completely, recycled. It is preferred that, of the at least two different polyolefins, both are at least partially, preferably to an extent of more than 50% by weight and more preferably completely recycled. The proportion of amorphous polyalphaolefin in the mixture according to the invention is preferably from 1% to 25% by weight, more preferably from 2% to 15% by weight, particularly preferably from 3% to 10% by weight, and most particularly preferably from 5% to 7.5% by weight based on the total mass of the mixture. The amorphous polyalphaolefin preferably has a polydispersity (Mw / Mn) of 5 to 10 and / or, preferably, a glass transition temperature of -45 °C to -25 °C, determined in each case according to the measurement procedure reported below in the measurement procedures section. The amorphous polyalphaolefin preferably has a melt flow index [MFI 2.16 kg at 140 °C] of 40 to 10,000, preferably 50 to 5,000 and more preferably 100 to 2,000 determined according to the measurement procedure reported below in the measurement procedures section. CRebnn / zznz / E / YiAi In the amorphous polyalphaolefin based on the monomers ethylene, propylene, and 1-butene, the proportion of the propylene or 1-butene monomers is greater than 50% by weight, preferably from 51% to 98% by weight, and the proportion of the sum of the remaining monomers, ethylene and 1-butene or ethylene and propene, is in each case less than 50% by weight, based in each case on the sum of the proportions of ethylene, propylene, and 1-butene. The proportion of ethylene is preferably from 1% to 15% by weight with respect to the sum of the monomers ethylene, propylene, and 1-butene. It may be advantageous when the amorphous polyalphaolefin has isotacticities of the 1-butene or propene blocks of less than 80% of the mmmm-pentad determined according to the measurement procedure reported in the description. The mixture is preferably a blend of the listed constituents, most preferably a granule mixture of the aforementioned constituents. It can be advantageous when the mixture is in the form of a mixed-granule material in which each granule contains all the constituents. Such mixed-granule materials have the advantage that their processing, for example, by injection molding, yields components in which the constituents are more homogeneously distributed, which can result in improved material characteristics. The mixture according to the invention may contain other constituents such as, for example, additives, fillers, and / or pigments (organic or inorganic). The mixtures according to the invention preferably comprise fibers, most preferably glass fibers, mineral fibers, wood fibers, or other fiber components, as fillers. This allows for increased strength in the mixtures according to the invention. This enables the mixtures to be employed or used in applications that impose high mechanical demands on the material employed, such as, for example, when used as composites or composite materials, or for the production thereof. The mixture preferably comprises from 0.01% to 3% by weight of at least one antioxidant, based on the sum of the anti-corrosive agents and antioxidants.The antioxidants that can be used include all substances known as antioxidants and / or inhibitors, i.e., substances that stop the propagation of a free radical reaction. The mixture according to the invention preferably contains spherically hindered amines, for example, piperidine derivatives, and more preferably spherically hindered phenols, such as, for example, Irganox 1010, Naugard XL1, and Songnox 1035. This allows for the prevention or reduction of APAO degradation and / or yellowing. CRPbnn / zznz / B / YiAi The mixture preferably comprises from 0.01% to 3% by weight of at least one degradation product of a free radical former, based on the sum of APAO and degradation products of free radical formers. The mixture according to the invention preferably contains benzoic acid, methanol, butanol, tert-butanol, propionic acid, and / or, preferably, 2,5-dimethylhexanol as a degradation product of a free radical former. The mixtures according to the invention can be produced by means of known mixture-making processes. The mixtures according to the invention are preferably produced by means of the mixture-making process described below, which is characterized in that the mixture constituents are mixed. In the process according to the invention, the constituents are preferably used and mixed as powders or granules. It may be advantageous for a granule mixture obtained in this way to be processed into a blended granule material, for example, by extrusion of the granule mixture. The granule mixture can therefore be applied, for example, via a mixing drum or by using hoppers. The granules can be loaded through a mixing funnel and thus homogenously fed into a further granulation process in a mixing extruder before this blended granule material undergoes further processing. Alternatively, it is also possible to feed the components as a melt stream into an extruder via a sequence of extruders, which then feeds the material into a molding process.In addition, one of these processes can also be used to manufacture the final workpiece directly by means of an extrusion or injection molding process without going through granulation. It may be advantageous when the process according to the invention contains a step comprising the production of containers, films, injection-molded parts, tubes, hoses, fibers, textiles, bottles, plastic housings, masterbatch compounds to improve pigment dispersion, and the manufacture of plastics in the automotive or transportation sectors. The mixtures according to the invention / the mixture produced according to the invention can be used for all applications for which polyolefin mixtures are typically used. It is preferred when the mixtures according to the invention / the CRPfrnn / zznz / B / YiAi mixtures produced according to the invention are employed or used as, or for, the production of containers, films, injection-molded parts, tubes, hoses, fibers, textiles, bottles, plastic housings, masterbatch compounds to improve pigment dispersion, the manufacture of plastics in the automotive or transport sectors. Even without further elaboration, it is assumed that those experienced in the technique are able to utilize the above description to the fullest extent possible. Therefore, the preferred embodiments and examples should be interpreted simply as a descriptive overview that is in no way limiting. The object of the present invention is clarified more particularly by means of Figures 1 and 2, without any intention that the object of the present invention is limited to them. Fig. 1 shows a scanning electron micrograph of the fracture edge of the test specimen according to Example 1.11, prepared and recorded as described in Example 2. Fig. 2 shows a scanning electron micrograph of the fracture edge of the test specimen according to Example 1.12, prepared and recorded as described in Example 2. The object of the present invention is made more particularly clear in the examples that follow, without intending that the object of the present invention is limited to these. Measurement procedures: Notched impact strength: Notched impact strength was determined in accordance with IZOD ISO 180 / 1A using a Zwick 5102.100 / 00 test apparatus. Tensile test: Tensile tests were performed and carried out in accordance with EN ISO 527-1. A Zwick BT1-FB010TH.D30 testing apparatus was used. Optical determination of domains: The analytical instruments used were an Epson V850 Pro scanner and a JEOL SM IT300 scanning electron microscope (SEM). CRebnn / zznz / E / YiAi Glass transition temperature [Tg]: Thermal analyses were performed according to DIN EN ISO 11357. A Mettler Toledo DSC1 instrument was used, and the evaluation was carried out using Stare 10.0 software. For semicrystalline polymer samples, the influence of thermal history is eliminated only after the entire sample has melted; therefore, the determination of Tg requires a second heating cycle to obtain reproducible results at the defined heating and cooling rates. Preferably, a uniform heating rate of 10 K / min to Tg + 50 °C and a cooling rate of 20 K / min to Tg - 50 °C should be used. The glass transition temperature is the temperature of the sample at which half the change in specific heat capacity [0.5 Δcp] is reached. It is the temperature of the intersection of the midline between the extrapolated baselines before and after the glass transition with the measured curve.Molecular weight determination: Mw represents the weight-average molecular weight and Mn represents the number-average molecular weight. The molecular weights Mw and Mn were determined by HT-GPC [high-temperature gel permeation chromatography] according to DIN 55 672. Specifically, analytical HT-GPC was performed at 150 °C using a PL220 oven (Agilent, Waldbronn) with an isocratic pump. 1,2,4-Trichlorobenzene (TCB) (Merck, Darmstadt) enriched with approximately 1 g / L of butylated hydroxytoluene (BHT) was used as the mobile phase at a flow rate of 1 mL / min, and one Agilent PLgel Olexis Guard (50 x 7.5 mm, pre-column) and three Agilent PLgel Olexis columns (300 x 7.5 mm) were used as the stationary phase. The detection was carried out using an IR detector (model IR4, PolymerChar, Valencia, Spain).The datasets were evaluated using a polystyrene calibration (EasiCal PS-1, Agilent) with WinGPC software (Polymer Standards Service, Mainz). Polydispersity (Mw / Mn), also known as molecular weight distribution, is obtained by dividing the weight-average molecular weight by the number-average molecular weight. Viscosity at 190 °C: Viscosity is determined at 190 °C by means of measurements with a rotary viscometer in accordance with DIN 53 019. The measurements are carried out using a Brookfield CAP 2000+ conical plate viscometer with a viscosity-dependent shear rate according to Table a below: CRPbnn / zznz / B / YiAi Table a: Cone Cutoff Rate Eta (at 10% torque utilization) Eta (at 100% torque utilization) 07 10 s-1 6,300 mPas 63,000 mPas 08 10 s-1 25,000 mPas 250,000 mPas 07 30 s-1 2,100 mPas 21,000 mPas CRPfcnn / zznz / B / YiAi The Brookfield viscometer was calibrated using a 500,000 BW Newtonian standard sample. This was obtained from Zentrum für Messen und Kalibrieren & Analytik GmbH and issued with an accompanying calibration certificate. Instrument calibration is performed only when changing the DKD oil, using DKD oil from ZMK& ANALYTIK GmbH. This is done using cone 7. An initial measurement of the new DKD oil is taken first, followed by instrument calibration. The Newtonian standard sample is weighed directly onto the spindle. This involves placing the spindle upside down in a 100 ml Erlenmeyer flask and weighing out the appropriate amount. The spindle is then mounted on the viscometer and lowered. After preheating for at least 3 minutes, the 'Spindle' button on the control panel is pressed, and the 'Enter' button is confirmed. The message 'Calibrate YES / NO' appears.Selecting 'YES' initiates calibration mode. The desired temperature and dynamic viscosity (refer to the current calibration certificate) of the fluid are entered and then confirmed. Note that the viscosity value must be entered in cP (cP = mPas). In response to the prompt, 'SPEED' 10 s⁻¹ is entered and confirmed with 'Enter'. The calibration then begins with 'Run'. After calibration, the calibration value is saved with 'Enter'. Melt flow index (MFI): The MFI of 2.16 kg at 230 °C and 2.16 kg at 190 °C was determined according to ISO 1133-1:2011 using a Zwick MFlow instrument. The melt mass flow rate (MFR) and melt volume flow rate (MVR) are determined by extruding molten material from the cylinder of a plastometer through an extrusion die of specified length and diameter under specific temperature and applied load conditions. If, at a temperature of 190 °C, the MFI values ​​are above 1000 with a load of 2.16 kg, the measurement temperature should be reduced to 140 °C to obtain reliable measured values ​​(MFI of 2.16 kg at 140 °C). To measure the MFR (procedure A), extruded sections are weighed at specified times and used to calculate the extrusion rate in g / 10 min. To measure the MVR (procedure B), the length of the path traveled by the piston in a specific time, or the time required for the piston to cover a specific path length, is plotted and used to calculate the extrusion rate in cm3 / 10 minutes. The MVR can be converted to MFR, or vice versa, if the melt density of the material at the test temperature is known. Isotacticity: The polymer composition and isotacticity [% of mmmm-pentad] are determined by high-temperature 13C-NMR according to the following 10 publications: A. Zambelli et al.'. Mamolecules, 8, 687 (1975) and A. Filho, G. Galland: J. Appl. polym. Sci., 80, 1880 (2001). CRPbnn / zznz / E / YiAi Examples: CRPfrnn / zznz / B / YiAi Supplies included: Polypropylene RB307MO Borealis AG Polypropylene HF955MO Borealis AG Recycling of polypropylene procyclen® PP 10 M10 C09 ALBA Recycling GmbH Recycling of polyethylene HDPE recythen® ALBA Reciclaje GmbH Polyethylene BorPure™ MB5568 Borealis AG Polyethylene BB2581 Borealis AG APAO VESTOPLAST® 888 Evonik Resource Efficiency GmbH APAO VESTOPLAST® 704 Evonik Resource Efficiency GmbH Copolímero en bloque INFUSAR™ 9807 The Dow Chemical Company Polypropylene L-MODU™ S600 Idemitsu Kosan Co., Ltd. Crystalline PE / PP copolymer LICOCENE® PP2602 Clariant AG Table b: Parameters of various input materials Additive Mw / Mn MFI 2.16 at 190 °C [g / 10 minutes] MFI 2.16 kg at 140 °C [g / 10 minutes] Tg [°C] Viscosity at 190 °C [mPas] VESTOPLAST® 888 6.8 129 nm 23 ~ 90,000 VESTOPLAST® 704 5.9 > ​​1,000 930 -28 ~ 4,000 INFUSAR™ 9807 2.1 15 nm -62 > 1,000,000 L-MODU™ S600 1.9 173 44 -10 ~ 40,000 LICOCENE® PP2602 1.8 > 1,000 1,300 -9 ~ 2,500 Table c: Parameters of various input materials (manufacturer data) Polymer MFI 2.16 kg at 190 °C [g / 10 min] MFI 2.16 kg at 230 °C [g / 10 min] RB307MO - 1.5 HF955MO - 20.0 BorPure™ MB5568 0.8 - BB2581 0.3 - procyclen® PP 10 M10 C09 10.0 HDPE recythen® Example 1: The granule mixtures were produced using the raw materials and quantities indicated in Table 1. Mixing was carried out manually by adding all the ingredients to a PE bag, the contents of which were then fed into the hopper of a gravimetric measuring system. The granule mixture was subsequently processed into a mixed granule material in an extruder (Leistritz ZSE 27 MAXXX 44LD) at 210 °C and a speed of 300 rpm. Table 1: Raw materials used and quantities (in percentage by weight) for the production of granule mixtures CRPbnn / zznz / E / YiAi Example PP PE APAO 1.1 65% of HF955MO 35% of BB2581 - 1.2 61% of HF955MO 33% of BB2581 6% of VESTOPLAST® 888 1.3 61% of HF955MO 33% of BB2581 6% of VESTOPLAST® 704 1.4 61% HF955MO 33% BB2581 6% L-MODU™ S600 1.5 61% HF955MO 33% BB2581 6% LICOCENE® PP2602 1.6 61% HF955MO 33% BB2581 6% INFUSO™ 9807 1.7 65% of HF955MO 35% BorPure™MB5568 - 1.8 61% HF955MO 31% BorPure™MB5568 6% VESTOPLAST® 888 1.9 65% RB307MO 35% BB2581 - 1.10 61% RB307MO 33% BB2581 6% VESTOPLAST® 888 1.11 65% RB307MO 35% BorPure™MB5568 - 1.12 61% RB307MO 33% BorPure™MB5568 6% VESTOPLAST® 888 1.13 67% RB307MO 33% BorPure™MB5568 1.14 63% RB307MO 31% BorPure™MB5568 6% VESTOPLAST® 888 This mixed granule material was subsequently used to produce tensile test specimens (tensile test weights) in accordance with DIN EN ISO 527-2 on an injection molding machine (Engel ES200 / 50HL) at an injection temperature of 230 °C, an injection pressure of 600 bar and a cycle time of 45 sec. Half of the tensile test dumbbells were used to determine notched impact resistance (NIR) according to IZOD ISO 180 / 1A and the other half for the tensile test according to EN ISO 527-1. The test results can be found in Table 2. There: Et = tensile modulus, om = tensile strength, oy = yield strength, εγ = yield elongation, £ib = nominal elongation at break and £b = elongation at break. CRebnn / zznz / E / YiAi Table 2: Test Results Example NIR Tensile test according to EN ISO 527-1 [kJ / m2] Et [MPa] om [MPa] oy [MPa] £Y [%] EtB [%] SB [%] 1.1 2.63 926 35.6 7.2 8.8 7.2 1.2 1.51 848 29.6 5.3 1.3 1.54 825 29.2 4.5 1.4 1.87 876 32.8 6.5 1.5 nmnmnmnmnmnmnm 1.6 6.06 840 30.6 30.6 6.8 9 6.7 1.7 3.60 889 36.3 36.3 7.4 11 1.8 2.34 774 30.5 6.2 1.9 13.03 602 25.9 25.9 12.0 160 1.10 14.46 525 23.3 23.2 13.0 280 1.11 13.62 585 25.4 25.4 12.0 150 1.12 24.37 505 22.7 22.8 13.0 270 1.13 13.60 25.0 100 1.14 24.90 22.1 186 nm: not measured According to Tables 1 and 2, the addition of APAO as an additive to PE / PP granule blends results in mixed granule materials suitable for injection molding. These molded articles exhibit significantly improved elongation and impact resistance, with only slightly reduced tensile strength. This is particularly true for blends containing at least one other amorphous or semicrystalline polyolefin component in addition to APAO. Example 2: The test samples from Examples 1.11 and 1.12 were cooled in liquid nitrogen and in each case were fractured longitudinally and transversely, pulverized with palladium, and subsequently analyzed by SEM. The micrographs are shown in Figures 1 and 2. In the samples from examples 1.11 and 1.12, the images show a greater number of smaller domains that appear more homogeneous in Fig. 2. Therefore, it seems that the bonding is improved as also indicated by the better mechanical properties of example 1.12 (Table 2).

Claims

1. A mixture containing at least two different polyolefins, characterized in that it contains as an additional constituent an amorphous polyalphaolefin based on the monomers ethene, propene, and 1-butene and having a viscosity at 190 °C, measured according to the procedure described herein, of 200 mPa·s to 200,000 mPa·s, wherein it contains polyethylene and polypropylene as at least two different polyolefins, and wherein the polyethylene has a melt flow index (MFI 2.16 kg at 190 °C), determined according to the ISO 1133 procedure described herein, of less than 10 g / 10 min, preferably from 0.01 to 2 g / 10 min, and the polypropylene has a melt flow index (MFI 2.16 kg at 230 °C), determined according to the procedure described herein, of less than 50 g / 10 min, preferably from 0.01 to 25 g / 10 min. g / 10 min.

2. Mixture according to Claim 1, characterized in that it contains polyethylene and polypropylene as at least two different polyolefins.

3. Mixture according to Claim 1 or 2, characterized in that at least one of the two different polyolefins is at least partially, preferably completely, a recycled material.

4. Mixture according to any one of Claims 1 to 3, characterized in that the proportion of amorphous polyalphaolefin is from 1% to 25%, preferably from 2% to 15%, particularly preferably from 3% to 10% by weight and most particularly preferably from 5% to 7.5% by weight, based on the total mass of the mixture.

5. A mixture according to any one of Claims 1 to 4, characterized in that the proportion of minor polyolefin in the mixture is from 1% to 45% by weight, preferably from 2% to 30% by weight and particularly preferably from 5% to 20% by weight and the proportion of major polyolefin in the mixture is from 55% to 99% by weight, preferably from 70% to 98% by weight and particularly preferably from 80% to 95% by weight, based on the total mass of at least two different polyolefins.

6. Mixture according to any of Claims 1 to 5, characterized in that the amorphous polyalphaolefin has a polydispersity of 5 to 10 and / or, preferably, a glass transition temperature of -45 °C to -25 °C, in each case determined according to the measurement procedure described herein.

7. A mixture according to any one of Claims 1 to 6, characterized in that the amorphous polyalphaolefin has a melt flow index [MFI 2.16 kg at 140 °C] of 40 to 10,000 determined according to the measurement procedure described herein. CRPbnn / zznz / E / YiAi 8. A mixture according to any one of Claims 1 to 7, characterized in that the amorphous polyalphaolefin is based on the monomers ethylene, propylene and 1-butene, the proportion of the propylene or 1-butene monomers is greater than 50% by weight and the proportion of the sum of the remaining monomers ethylene and 1-butene or ethylene and propene is in each case less than 50% by weight, in each case based on the sum of the molar proportions of ethylene, propylene and 1-butene.

9. A mixture according to any one of claims 1 to 8, characterized in that the amorphous polyalphaolefin exhibits isotacticities of the 1-butene or propene blocks less than 80% of the mmmm-pentad determined according to the measurement procedure described herein.

10. A process for producing mixtures according to any one of claims 1 to 9, characterized in that the constituents are mixed.

11. A process according to claim 10, characterized in that the constituents are employed and mixed in the form of powder or mixed granules.

12. A process according to claim 11, characterized in that the granule mixture is extruded to yield a mixed granule material.

13. A process according to any of claims 10 to 12, characterized in that it comprises a step comprising the production of containers, films, injection-molded parts, tubes, hoses, fibers, textiles, bottles, plastic housings, masterbatch compounds for improving pigment dispersion, and the manufacture of plastics in the automotive or transportation sectors.

14. Use of a mixture according to any of claims 1 to 9 as, or for, the production of containers, films, injection-molded parts, tubes, hoses, fibers, textiles, bottles, plastic housings, masterbatch compounds for improving pigment dispersion, and the manufacture of plastics in the automotive or transportation sectors.