THERMOPLASTIC POLYMER COMPOSITIONS WITH IMPROVED FLEXIBILITY

Abstract

The invention relates to a thermoplastic composition comprising at least one butene-1 (co)polymer, at least one heterophasic propylene copolymer, and at least one propylene-based elastomer. The invention also relates to the use of the thermoplastic composition according to any of the preceding claims to produce a shaped article, with the shaped article comprising a substrate layer comprising the thermoplastic composition of the present invention, with a method for producing a shaped article, and with a method for coating a substrate using the shaped articles of the present invention.

Description

The invention relates to thermoplastic polymer compositions and their use in producing industrial coatings, such as waterproofing and roofing membranes. Background of the invention In the construction industry, polymer sheets, often referred to as membranes or panels, are used to protect above-ground and underground structures, such as basements, tunnels, and flat or low-slope roofs, from water penetration. Waterproofing membranes are applied, for example, to prevent water from entering through cracks that develop in the concrete structure due to building settlement, load deformation, or concrete shrinkage. Roofing membranes are applied to the surface of the roofing substrate that needs waterproofing, such as insulating board or vertical cladding on flat or low-slope roof structures. Waterproofing and roofing membranes are typically delivered to construction sites in rolls, which are transported to the installation location, unrolled, and adhered to the substrate to be waterproofed.The substrate to which the membrane adheres can be composed of various materials, depending on the installation location. For example, the substrate could be a wooden, concrete, or metal platform, or it could include an insulating board or reclaimed cladding and / or an existing membrane. Materials commonly used for waterproofing and roofing membranes include plastics, particularly thermoplastics such as plasticized polyvinyl chloride (p-PVC), thermoplastic olefin elastomers (TPE-O), and crosslinked elastomers such as ethylene-propylene diene monomers (EPDM). Thermoplastic olefin elastomers (TPE-O), also known as thermoplastic polyolefins (TPO), are specific types of heterophasic polyolefin compositions. These consist of mixtures of a highly crystallinity "base polyolefin," typically with a melting point of 100°C or higher, and an amorphous or low-crystallinity "polyolefin modifier," typically with a glass transition temperature of -20°C or lower. The heterophasic phase morphology consists of a matrix phase, composed mainly of the base polyolefin, and a dispersed phase, composed mainly of incorporated particles of the polyolefin modifier.The TPOs available on the market include reactor blends of the base polyolefin and the polyolefin modifier, as well as physical blends of the. MA / a / ZUZI z polyolefin base and polyolefin modifier. A reactor blend is typically produced using a sequential polymerization process, in which the matrix phase components are produced in a first reactor and transferred to a second reactor, where the dispersed phase components are produced and incorporated as domains within the matrix phase. Physically blended TPOs are produced through melt blending of the polyolefin base and the polyolefin modifier, each of which is formed separately before the components are blended. Reactor blended TPOs are often characterized as "in situ TPO" or "reactor TPO" or as "heterophasic copolymers." TPO membranes have been widely used in commercially available roofing membranes due to their numerous beneficial properties. Unlike membranes made from cross-linked elastomers, TPO membranes are thermoplastic, allowing overlapping membrane edges to be joined together by heat welding. TPO membranes are also considered to offer an advantage over plasticized PVC membranes because they do not contain environmentally harmful plasticizers. The main disadvantage of TPO membranes is their lower flexibility compared to membranes made from plasticized PVC or cross-linked elastomers such as EPDM. This reduced flexibility is particularly noticeable at low temperatures, especially below 0°C.Membranes with high flexibility are particularly preferred in roofing applications, as they allow for easier installation, especially in edge and corner areas. It is possible to improve the flexibility of a TPO-based material, for example, by increasing the proportion of the low-crystallinity polyolefin modifier component in the mix. However, this strategy has been found to increase the stickiness of the TPO material and, consequently, increase membrane adhesion. In general, membrane adhesion is undesirable, as it complicates various post-processing steps, such as trimming, welding, stacking, and unwinding the membrane from a roll. Another strategy for increasing the flexibility of a TPO material has been to reduce the crystallinity of the TPO matrix phase. These types of TPO typically have a low flexural modulus, but they also have a low softening point, which considerably limits their use in roofing applications.The flexibility of a TPO material can also be increased by adding mineral oils to the material as plasticizers. These strategies have also proven less successful, as mineral oils tend to migrate from the polymer matrix over time, even if selected for low vapor pressure and viscosity. MA / a / ZUZI high z. The migration of mineral oils makes these types of TPO materials less suitable for use in roofing applications, where membranes are often exposed to relatively high temperatures, such as in the 60 to 80°C range. Therefore, a novel type of thermoplastic polymer composition is needed that can be used to supply shaped objects, particularly waterproofing and roofing membranes, and that exhibits improved cold flexibility compared to prior art TPO-based membranes. Additionally, the novel thermoplastic polymer composition should also demonstrate low sticking tendency, excellent mechanical properties, and high stability at elevated temperatures. Compendium of the invention The object of the present invention is to provide a thermoplastic composition suitable for use in the preparation of shaped objects with improved flexibility, particularly at low temperatures. Another object of the present invention is to provide a thermoplastic composition suitable for use in the manufacture of shaped objects, such as waterproofing and roofing membranes, that exhibit a low tendency to adhere, excellent mechanical properties, and high stability at elevated temperatures. It was surprisingly discovered that butene-1 (co)polymers having a high content of butene-1 derived monomer units, in particular at least 70% by weight, preferably at least 75% by weight, can be used to considerably increase the flexibility of a polymer component with at least one heterophasic propylene copolymer. It was also surprisingly discovered that mixing the previously described good-1 copolymers with heterophasic propylene copolymers allows for the delivery of thermoplastic compositions with a large amount of filler, which have a low flexural modulus at a temperature of -30SC. Other objects of the present invention are presented in other independent claims. Preferred aspects of the invention are presented in the dependent claims. Detailed description of the invention The object of the present invention is a thermoplastic composition comprising a polymeric component, comprising: MA / a / ZUZI ÓZ I z a) at least one butene-1 (co)polymer and / or at least one ethylene-based block copolymer, b) at least one heterophasic propylene copolymer and c) at least one propylene-based elastomer, wherein the butene-1 (co)polymer or (co)polymers have a content of butene-1 derived units of at least 70% by weight, preferably at least 75% by weight, more preferably at least 80% by weight, even more preferably at least 84% by weight. The names of substances that begin with "poly" indicate substances that formally contain, per molecule, two or more of the functional groups listed in their names. For example, a polyol refers to a compound that has at least two hydroxyl groups. A polyether refers to a compound with at least two ether groups. The term "polymer" refers to a set of chemically uniform macromolecules produced through a polyreaction (polymerization, polyaddition, polycondensation), in which the macromolecules differ with respect to their degree of polymerization, molecular weight, and chain length. The term also includes derivatives of this set of macromolecules arising from polyreactions; that is, compounds obtained through reactions such as, for example, additions or substitutions, of functional groups in predetermined macromolecules, and which may be chemically uniform or chemically unequal. The term "α-olefin" designates an alkene with the molecular formula CXH2X (where x represents the number of carbon atoms), which has a carbon-carbon double bond at the first carbon atom (the α-carbon). Examples of α-olefins include ethylene, propylene, 1-butene, 2-methyl-1-propene (isobutylene), 1-pentene, 1-hexene, 1-heptene, and 1-octene. For example, neither 1,3-butadiene, nor 2-butene, nor styrene are listed as "α-olefins" according to this description. The term "thermoplastic" refers to any material that can be melted and resolidified with minimal or no change in its physical properties. The term "molecular weight" refers to the molar mass (g / mol) of a molecule or a part of a molecule, also referred to as the "remainder." The term "average molecular weight" refers to the numerical average molecular weight (Mn) of an oligomeric or polymeric mixture of molecules or remainders. Molecular weight can be determined using conventional methods, preferably by gel permeation chromatography (GPC), using polystyrene as a standard, styrene-divinylbenzene gel with porosities of 100 Angstroms, 1000 Angstroms, and 10,000 Angstroms as a column, and tetrahydrofuran as a solvent, at a temperature of 35°C. / ui ¿¿i ¿ The term "glass transition temperature" (Tg) indicates the temperature above which a polymer component becomes soft and malleable, and below which it becomes rigid and glassy. The glass transition temperature (Tg) is preferably determined through dynamic mechanical analysis (DMA) as the peak of the loss modulus curve (G'j) measured using a rheometer in torsion mode (with cyclic torsional loading), with an applied frequency of 1 Hz and a stress level (amplitude) of 1%. The term "softening point" refers to the temperature at which the compound softens into a rubber-like state or the temperature at which the crystalline part of the compound melts. The softening point is preferably determined by ring and ball testing according to DIN EN 1238. The term "melting temperature" refers to the temperature at which a material undergoes a transition from the solid to the liquid state. The melting temperature (Tm) is preferably determined by differential scanning calorimetry (DSC), according to ISO 11357, using a heating rate of 2 sC / min. Measurements can be performed with a Mettler Toledo DSC 3+ device, and Tm values ​​can be determined from the measured DSC curve with the assistance of DSC software. If the measured DSC curve shows several peak temperatures, the first peak temperature from the lower-temperature side of the thermogram is taken as the melting temperature (Tm). "Comonomer content of a copolymer" refers to the total amount of comonomers in the copolymer, expressed as a weight percent or mol percent. Comonomer content can be determined using IR spectroscopy or through quantitative nuclear magnetic resonance (NMR) measurements. The "amount or content of at least one component X" in a composition, for example, "the amount of the thermoplastic polymer or polymers," refers to the sum of the individual amounts of all thermoplastic polymers included in the composition. For example, if the composition comprises 20% by weight of at least one thermoplastic polymer, the sum of the amounts of all thermoplastic polymers included in the composition equals 20% by weight. The term "room temperature" indicates a temperature of 23 °C. The thermoplastic composition of the present invention is preferably a physical mixture of its components, i.e., the thermoplastic composition was obtained by mixing the components of the thermoplastic composition with each other, with each of said components formed separately before the mixing of the components. The thermoplastic composition comprises a polymer component comprising the component elements a), b), and c). The amount of the polymer component in the thermoplastic composition is not particularly limited and depends on the intended use of the thermoplastic composition, in particular the amount of fillers, flame retardants, and other additives included in the thermoplastic composition. Preferably, the polymer component constitutes at least 25% by weight, more preferably at least 35% by weight, even more preferably at least 40% by weight, and still more preferably at least 45% by weight of the total weight of the thermoplastic composition. According to one or more embodiments, the polymer component constitutes 35 to 85% by weight, preferably 40 to 80% by weight, more preferably 45 to 75% by weight of the total weight of the thermoplastic composition. According to one or more additional embodiments, the polymer component constitutes at least 65% by weight, more preferably at least 75% by weight, more preferably at least 85% by weight of the total weight of the thermoplastic composition. The thermoplastic composition of the present invention comprises at least one butene-1 (co)polymer. The term "(co)polymer" is understood to include homopolymers, copolymers, random copolymers, block copolymers, and terpolymers. The butene-1 (co)polymer or (co)polymers may be a homopolymer or a copolymer of butene-1 with one or more comonomers (other than butene-1), preferably one or more α-olefins. Suitable α-olefins present as comonomers in the butene-1 (co)polymer include ethylene, propylene, pentene-1, hexane-1,4-methylpentene, and octene-1. According to one or more embodiments, the butene-1 (co)polymer or (co)polymers have a butene-1 derivative content of at least 75 mol%, preferably at least 80 mol%, and more preferably at least 85 mol%. The butene-1 (co)polymer or (co)polymers included in the thermoplastic composition of the present invention can be obtained, for example, using any of the methods described in WO 2012 / 052429 A1. Suitable butene-1 (co)polymers are commercially available, for example, from the Koattro® brand, such as Koattro KT MR 05 (from Lyondell Basell). According to one or more embodiments, the butene-1 (co)polymer or (co)polymers have: - a flexural modulus at 23SC, determined according to ISO 178, below 150 MPa, preferably below 125 MPa, more preferably below 75 MPa, even more preferably below 50 MPa, even more preferably below MA / a / ZUZI ÓZ I z of 35 MPa, in particular below 25 MPa, more preferably below 15 MPa and / or - a melt flow rate (190 sC / 2.16 kg), determined according to ISO 1133-1, below 15 g / 10 min, preferably below 10 g / 10 min, more preferably below 7.5 g / 10 min, even more preferably below 5 g / 10 min, in particular below 3.5 g / 10 min, more preferably below 2.5 g / 10 min and / or - a melt temperature (Tm), determined by DSC according to ISO 11357, with a heating rate of 2 sC / min, below 110 sC, preferably below 100 sC, more preferably below 85 sC, even more preferably below 75 sC, in particular below 65 sC, more preferably below 502 sC and / or - a polydispersity index (Mw / Mn), determined by GPC, below 5, preferably in the range of 1.5 to 5, more preferably 1.5 to 4.5, even more preferably 2 to 4.5, even more preferably 2 to 4 and / or - a glass transition temperature (Tg), determined by dynamic mechanical analysis (DMA) as the peak loss modulus (G”) measured under a cyclic torsional load at a frequency of 1 Hz and a voltage level of 1%, below -102°C, preferably below -152°C, more preferably below -202°C, even more preferably below -25°C and / or - an intrinsic viscosity, determined by tetralin at a temperature of 135eC according to ISO 1628-3:2010, of 1 to 5 dL / g, preferably 1 to 4.5 dL / g, more preferably 1.5 to 4 dL / g, even more preferably 1.5 to 3.5 dL / g, even more preferably 1.5 to 2.5 dL / g. According to one or more embodiments, the butene-1 (co)polymer or (co)polymers are a butene-1 homopolymer or a butene-1 copolymer with one or more α-olefins, preferably selected from the group consisting of ethylene and propylene, wherein the copolymer preferably has a comonomer-derived unit content below 25 mol%, preferably below 20 mol%, more preferably from 1 to 20 mol%, even more preferably from 1 to 15 mol%. According to one or more embodiments, in addition to or as a substitute for the butene-1 (co)polymer(s), the thermoplastic composition comprises at least one ethylene-based olefin block copolymer. It is not necessary to clarify that the ethylene-based olefin block copolymer(s) are different from the butene-1 (co)polymer(s). According to one or more modalities, the ethylene-based olefin block copolymer or copolymers are an ethylene-olefin-a block copolymer. Suitable comonomers for the ethylene-α-olefin block copolymer or copolymers include, for example, linear and branched α-olefins with 3 to 30 carbon atoms. According to one or more embodiments, the comonomer in the ethylene-α-olefin block copolymer or copolymers is selected from the group consisting of propylene, 1-butene, 1-pentene, 3-methyl-1-butene, 1-hexene, 4-methyl-1-pentene, 3-methyl-1-pentene, 1-octene, 1-decene, 1-dodecene, 1-tetradecene, 1-hexadecene, 1-octadecene, and 1-eicosene, preferably from the group consisting of propylene, 1-butene, 1-hexene, and 1-octene. Preferably, the ethylene-α-olefin block copolymer(s) comprise an ethylene-derived unit content of at least 50 wt%, preferably at least 55 wt%, and more preferably at least 60 wt%. According to one or more embodiments, the ethylene-α-olefin block copolymer(s) comprise an ethylene-derived unit content ranging from 55 to 85 wt%, preferably 60 to 85 wt%, and more preferably 60 to 80 wt%. According to one or more modalities, the ethylene-α-olefin block copolymer or copolymers have: - a tensile modulus, 100% secant, determined according to ASTM D638 at 23 ± 2SC, below 50 MPa, preferably below 35 MPa, more preferably below 15 MPa, even more preferably below 10 MPa, even more preferably below 5 MPa, most preferably below 3.5 MPa and / or - an ultimate tensile elongation, determined according to ASTM D638 at 23 ± 2SC, of ​​at least 450%, preferably at least 600%, more preferably at least 750%, even more preferably at least 850%, even more preferably at least 1000% and / or - a melt flow rate (190SC / 2.16 kg), determined according to ASTM D1238, below 20 g / 10 min, preferably below 15 g / 10 min, more preferably below 10 g / 10 min, even more preferably below 7.5 g / 10 min and / or - a glass transition temperature (Tg), determined by dynamic mechanical analysis (DMA) as the peak loss modulus (G”) measured with a cyclic torsional load at a frequency of 1 Hz and a voltage level of 1%, below -10eC, preferably below -25SC, more preferably below -35eC, even more preferably below -50SC. According to one or more of the embodiments, the ethylene-α-olefin block copolymer or copolymers are ethylene-octene block copolymers. Suitable ethylene-octene block copolymers are commercially available, for example, from the Infuse® brand, such as Infuse® 9100, Infuse® 9107, Infuse® 9500, Infuse® 9507, Infuse® 9530, Infuse® 9807, and Infuse® 9817 (all from Dow Chemical Company). Preferably, the polymeric component of the thermoplastic composition comprises at least 1.5% by weight, more preferably at least 2.5% by weight, even more preferably at least 5% by weight of the butene-1 (co)polymer or (co)polymers and / or at least 1.5% by weight, more preferably at least 2.5% by weight, even more preferably at least 5% by weight of the ethylene-based olefin block copolymer or copolymers, according to the total weight of the polymeric component. According to one or more embodiments, the polymeric component of the thermoplastic composition comprises 1.5 to 75% by weight, preferably 2.5 to 70% by weight, more preferably 2.5 to 65% by weight, even more preferably 5 to 60% by weight, even more preferably 5 to 50% by weight, more preferably 5 to 35% by weight of the butene-1 (co)polymer or (co)polymers, or 1.5 to 75% by weight, preferably 2.5 to 70% by weight, more preferably 2.5 to 65% by weight, even more preferably 5 to 60% by weight, even more preferably 5 to 50% by weight, more preferably 5 to 35% by weight of the ethylene-based olefin block copolymer or copolymers, according to the total weight of the polymeric component. The thermoplastic composition of the present invention further comprises at least one heterophasic propylene copolymer. Preferably, the heterophasic propylene copolymer or copolymers comprise: -A) a highly crystallinity polypropylene with a melting point (Tm) of 100°C or higher, wherein preferably the propylene homopolymer and / or the propylene random copolymer have a relatively low comonomer content, such as less than 5% by weight, and - B) a polyolefin with a glass transition temperature (Tg) of -202C, wherein preferably one or more ethylene copolymers have a relatively high comonomer content, such as at least 5 wt%, preferably at least 10 wt%, and have a glass transition temperature (Tg) of -30SC or lower, preferably -40eC or lower, preferably ethylene-propylene rubber (EPR), wherein the heterophasic propylene copolymer or copolymers comprise a matrix phase composed mainly of A) and a dispersed phase composed mainly of B). / ui ¿¿i ¿ Preferably, the heterophasic copolymer or copolymers are a reactor mixture of A) and B), with the reactor mixture obtained using a sequential polymerization process, wherein the matrix phase components are produced in a first reactor and transferred to a second reactor, where the dispersed phase components are produced and incorporated as domains in the matrix phase. Suitable heterophasic propylene copolymers available on the market include, for example, "reactor TPO" produced using LyondellIBasell's Catalloy processing technology, available under the brand names Adflex®, Adsyl®, Clyrell®, Hifax®, Hiflex®, and Softell®. Other suitable heterophasic propylene copolymers available on the market include, for example, heterophasic ethylene-propylene random copolymers, available under the brand name Borsoft®, such as Borsoft® SD233 CF (from Borealis Polymers). According to one or more modalities, the heterophasic propylene copolymer or copolymers have: - a flexural modulus at 23SC, determined according to ISO 178, below 1000 MPa, preferably below 750 MPa, more preferably below 700 MPa, even more preferably below 650 MPa, even more preferably below 600 MPa, most preferably below 500 MPa and / or - a cold-soluble xylene content, determined according to ISO 16152-2005, below 50% by weight, preferably below 45% by weight, more preferably below 40% by weight, even more preferably below 35% by weight, and / or - a melt flow rate (2.16 kg at 2309C), determined according to ISO 1133-1, below 50 g / 10 min, preferably below 30 g / 10 min, more preferably below 25 g / 10 min, even more preferably below 15 and / or - a melting temperature (Tm), determined by DSC according to ISO 11357 using a heating rate of 2sC / min, of at least 100SC, preferably at least 1102C, more preferably at least 120SC, even more preferably at least 130SC. According to one or more embodiments, the heterophasic propylene copolymer or copolymers are a heterophasic ethylene-propylene copolymer, preferably having a content of ethylene-derived units below 35% by weight, preferably below 30% by weight, more preferably below 25% by weight, even more preferably below 20% by weight, even more preferably below 15% by weight, most preferably below 10% by weight. According to one or more modalities, the propylene copolymer or copolymers MA / a / ZUZI ÓZ I z heterophasic comprise at least one heterophasic ethylene-propylene random copolymer. According to one of the embodiments, the heterophasic propylene copolymer or copolymers are a heterophasic ethylene-propylene random copolymer. Preferably, the heterophasic propylene copolymer or copolymers constitute at least 5 wt%, more preferably at least 10 wt%, even more preferably at least 15 wt%, and still more preferably at least 25 wt% of the total weight of the polymer component of the thermoplastic composition. The thermoplastic composition also comprises at least one propylene-based elastomer. Suitable propylene-based elastomers include, in particular, copolymers of propylene and at least one comonomer selected from the group consisting of ethylene and C4-C10 α-olefins, wherein the copolymer has a content of propylene-derived units of at least 65 wt%, preferably at least 70 wt%, and a content of units derived from at least one of ethylene or a C4-C10 α-olefin of 1 to 35 wt%, preferably 5 to 25 wt%. According to one or more embodiments, the propylene-based elastomer or elastomers are propylene-ethylene copolymers with a propylene-derived unit content of 75 to 95 wt%, preferably 80 to 90 wt%, and an ethylene-derived unit content of 5 to 25 wt%, preferably 9 to 18 wt%. According to one or more embodiments, the propylene-based elastomer or elastomers have: - a flexural modulus at 23SC, determined according to ISO 178, below 100 MPa, preferably below 50 MPa, more preferably below 35 MPa, even more preferably below 25 MPa, even more preferably below 15 MPa and / or - a melting temperature (Tm), determined by DSC in accordance with ISO 11357, with a heating rate of 22C / min, below 110SC, preferably below 105eC, more preferably below 100SC, and / or - a heat of fusion (Hf), determined by DSC using a heating rate of 10 s / min, below 80 J / g, preferably below 70 J / g, more preferably below 65 J / g, even more preferably below 50 J / g; - a cold-soluble xylene content, determined according to ISO 16152-2005, of at least 75% by weight, preferably at least 80% by weight, more preferably at least 85% by weight, even more preferably at least 90% by weight, even more preferably at least 95% by weight; and / or - a softening temperature (Ts), determined by ring and ball measurement according to DIN EN 1238, below 902C, preferably below 80SC, more preferably below 70SC, and / or - a melt flow rate (2.16 kg at 230SC), determined according to ISO 1133-1, below 50 g / 10 min, preferably below 40 g / 10 min, more preferably below 35 g / 10 min, and / or - an average molecular weight (Mn) in the range of 10,000 to 250,000 g / mol, preferably 25,000 to 200,000 g / mol. According to one or more embodiments, the propylene-based elastomer or elastomers constitute at least 5% by weight, preferably at least 10% by weight, more preferably at least 15% by weight, even more preferably at least 25% by weight of the total weight of the polymeric component of the thermoplastic composition. According to one or more embodiments, the weight ratio of the amount of the heterophasic propylene copolymer or copolymers to the amount of the propylene-based elastomer or elastomers is from 0.1:1 to 10:1, preferably from 0.3:1 to 3:1, more preferably from 0.5:1 to 2:1, even more preferably from 0.75:1 to 1.3:1, even more preferably from 0.8:1 to 1.25:1. According to one or more embodiments, the polymeric component of the thermoplastic composition comprises the butene-1 (co)polymer or (co)polymers and the heterophasic propylene copolymer or copolymers, wherein the butene-1 (co)polymer or (co)polymers constitute at least 1.5% by weight, preferably at least 2.5% by weight, more preferably at least 5% by weight, as 1.5 to 75% by weight, preferably 2.5 to 70% by weight, more preferably 2.5 to 65% by weight, even more preferably 5 to 60% by weight, even more preferably 5 to 50% by weight, more preferably 5 to 35% by weight of the total weight of the polymeric component, wherein the polymeric component preferably constitutes at least 15% by weight, more preferably at least 25% by weight, even more preferably at least 35% by weight, even more preferably at least 40% by weight. weight of the total weight of the thermoplastic composition. According to one or more embodiments, the polymeric component of the thermoplastic composition comprises the ethylene-based olefin block copolymer(s) and the heterophasic propylene copolymer(s), wherein the ethylene-based olefin block copolymer(s) constitute at least 1.5% by weight, more preferably at least 2.5% by weight, and even more preferably at least 5% by weight, as 1.5 to 75% by weight, preferably 2.5 to 70% by weight, more preferably 2.5 to 65% by weight, even more preferably 5 to 60% by weight, even more preferably 5 to 50% by weight, and even more preferably 5 to 35% by weight of the total weight of the polymeric component, wherein the polymeric component preferably constitutes at least 15% by weight, more preferably at least 25% by weight, even more preferably at least 35% by weight, and even more preferably at least 15% by weight, and even more preferably at least 25% by weight, and even more preferably at least 35% by weight, and even more preferably at least 5% by weight. less than 40% by weight of the total weight of the thermoplastic composition. According to one or more embodiments, the polymeric component of the thermoplastic composition is composed of the butene-1 (co)polymer or (co)polymers, the heterophasic propylene copolymer or copolymers, and the propylene-based elastomer or elastomers, wherein the polymeric component preferably comprises: a) at least 1.5% by weight, preferably at least 2.5% by weight, more preferably at least 5% by weight, such as 1.5 to 75% by weight, preferably 2.5 to 70% by weight, more preferably 2.5 to 65% by weight, even more preferably 5 to 60% by weight, even more preferably 5 to 50% by weight, more preferably 5 to 35% by weight of the 1-butene (co)polymer or (co)polymers, b) below 85% by weight, preferably below 75% by weight, such as 5 to 75% by weight, preferably 10 to 65% by weight, more preferably 15 to 60% by weight, even more preferably 25 to 55% by weight, even more preferably 30 to 50% by weight of the heterophasic propylene copolymer or copolymers, and c) below 85% by weight, preferably below 75% by weight, as 5 to 75% by weight, preferably 10 to 65% by weight, more preferably 15 to 60% by weight, even more preferably 25 to 55% by weight, even more preferably 30 to 50% by weight of the propylene-based elastomer or elastomers, with all proportions based on the total weight of the polymer component, wherein the polymer component preferably constitutes at least 15% by weight, more preferably at least 25% by weight, even more preferably at least 35% by weight, even more preferably at least 40% by weight of the total weight of the thermoplastic composition. According to one or more embodiments, the polymeric component of the thermoplastic composition comprises the ethylene-based olefin block copolymer or copolymers, the heterophasic propylene copolymer or copolymers, and the propylene-based elastomer or elastomers, wherein the polymeric component preferably comprises: a) at least 1.5% by weight, preferably at least 2.5% by weight, more preferably at least 5% by weight, such as 1.5 to 75% by weight, preferably 2.5 to 70% by weight, more preferably 2.5 to 65% by weight, even more preferably 5 to 60% by weight, even more preferably 5 to 50% by weight, more preferably 5 to 35% by weight of the ethylene-based block copolymer or copolymers, b) below 85% by weight, preferably below 75% by weight, such as 5 to 75% by weight, preferably 10 to 65% by weight, more preferably 15 to 60% by weight, even more preferably 25 to 55% by weight, even more preferably 30 to 50% by weight of the heterophasic propylene copolymer or copolymers, and (c) below 85% by weight, preferably below 75% by weight, as 5 to 75% by weight, preferably 10 to 65% by weight, more preferably 15 to 60% by weight, even more preferably 25 to 55% by weight, even more preferably 30 to 50% by weight of the propylene-based elastomer(s), all proportions being based on the total weight of the polymer component, wherein the polymer component preferably constitutes at least 15% by weight, more preferably at least 25% by weight, even more preferably at least 35% by weight, even more preferably at least 40% by weight of the total weight of the thermoplastic composition. Preferably, the thermoplastic composition is non-sticky at a temperature of 23°C.The term "sticky" in this description refers to a surface stickiness, in the sense of instantaneous adhesion or adhesiveness preferably sufficient such that, when pressed with the thumb and a pressure of 5 kg is exerted for 1 second on the surface of the composition, the thumb remains adhered to the surface of the composition, preferably so as to be able to lift a composition with an intrinsic weight of 50 g for at least 5 seconds. According to one or more embodiments, the thermoplastic composition is substantially free of tackifying resins. The term "tackifying resin" in this description refers to resins that generally enhance the adhesion and / or tackiness of a composition. Common tackifying resins include synthetic resins, natural resins, and chemically modified natural resins with a relatively low average molecular weight (Mn), such as below 3500 g / mol, and particularly below 2500 g / mol. It is understood that the expression "essentially free of tackifying resins" means that the amount of tackifying resins is preferably less than 1.0% by weight, more preferably less than 0.5% by weight, even more preferably less than 0.1% by weight, and still more preferably less than 0.05% by weight, based on the total weight of the thermoplastic composition. Depending on one or more of the formulations, the thermoplastic composition also includes at least one flame retardant. These may be necessary, in particular, when using the thermoplastic composition to prepare roofing membranes. According to one or more embodiments, the flame retardant or retardants constitute 55% by weight, preferably 5 to 50% by weight, more preferably 10 to 50% by weight, even more preferably 15 to 50% by weight, and even more preferably 20 to 40% by weight of the total weight of the thermoplastic composition. If used, the flame retardant or retardants are preferably selected from the group consisting of magnesium hydroxide, aluminum trihydroxide, antimony trioxide, ammonium polyphosphate and melamine-coated ammonium polyphosphates, melamine resin, melamine derivative, melamine-formaldehyde, silane, siloxane, and polystyrene. Other suitable flame retardants include, for example, 1,3,5-triazine compounds such as melamine, melam, melem, melon, ammelin, ammelide, 2-ureidomelamine, acetoguanamine, benzoguanamine, diaminophenyltriazine, melamine salts and adducts, melamine cyanurate, melamine borate, melamine orthophosphate, melamine pyrophosphate, dimelamine pyrophosphate and melamine polyphosphate, oligomeric and polymeric 1,3,5-triazine compounds and 1,3,5-triazine polyphosphate compounds, guanine, piperazine phosphate, piperazine polyphosphate, ethylenediamine phosphate, pentaerythritol, borophosphate, 1,3,5-trihydroxyethylisocyanaurate, 1,3,5-triglycidylisocyanaurate, trialylisocyanurate and derivatives of the aforementioned compounds. Suitable flame retardants can be found on the market, for example, under the Martinal® and Magnifin® brands (both from Albemarle) and under the Exolit® (from Clariant), Phos-Check® (from Phos-Check) and FR CROS® (from Budenheim) brands. According to one or more of the embodiments, the flame retardant(s) have a mean particle size (dso) below 25 µm, preferably below 15 µm, more preferably below 10 µm, and even more preferably below 5 µm. The term "mean particle size (dso)" refers to a particle size below which 50% of all particles by volume are smaller than the dso value. The term "particle size" in this description refers to the equivalent area spherical diameter of a particle. The particle size distribution can be determined by the laser diffraction method as described in ISO 13320:2009. The thermoplastic composition may further comprise one or more auxiliary compounds, such as heat and UV stabilizers, antioxidants, plasticizers, fillers, dyes and pigments, such as titanium dioxide and carbon black, opacifying agents, antistatic agents, impact modifiers, biocides, and processing aids such as lubricants, slip agents, anti-adherents, and release agents. The total amount of these auxiliary components is preferably less than 45% by weight, more preferably less than 35% by weight, and even more preferably less than 25% by weight. MA / a / ZUZI ÓZ I z weight, even more preferably less than 15% by weight, according to the total weight of the thermoplastic composition. Suitable fillers for use in thermoplastic compositions include, for example, inert mineral fillers. The term "inert mineral filler" in this description refers to mineral fillers that, unlike mineral binders, do not undergo a hydration reaction in the presence of water. Suitable inert mineral fillers include, for example, sand, granite, calcium carbonate, clay, expanded clay, diatomaceous earth, pumice, mica, kaolin, talc, dolomite, xonotlite, perlite, vermiculite, wollastonite, barite, magnesium carbonate, calcium hydroxide, calcium aluminosilicates, silica, fumed silica, fused silica, aerogels, glass microspheres, hollow glass spheres, ceramic spheres, bauxite, crushed concrete, and zeolites. If used, inert mineral fillers are preferably in the thermoplastic composition in the form of solid particles, preferably with a dgo particle size below 250 pm, more preferably below 150 μm, even more preferably below 100 pm, and still more preferably below 50 μm. The term "average particle size dgo" refers to a particle size below which 90% of all particles by volume are smaller than the d90 value. One of the benefits of the thermoplastic composition of the present invention is that a shaped object containing the thermoplastic composition exhibits low adhesion, allowing for easy subsequent processing of the substrate layer, such as trimming, welding, stacking, and unwinding. According to one or more embodiments, a shaped object composed of the thermoplastic composition of the present invention has an adhesion value, determined by the method described below, of less than 10 N / 15 mm, preferably less than 5 N / 15 mm, and more preferably less than 3.5 N / 15 mm. Measurement of the adhesion value The adhesion value is determined according to the measurement method defined in DIN 53366. The measurement is performed at a temperature of 23°C, using a peeling mode instead of a shearing mode; that is, the sheets being tested are separated using a peeling force. The adhesion value is determined as the force required over a sheet width of N / 15 mm to separate the two sheets after they have been held together under pressure for 72 hours at a temperature of 50°C, with a pressure of 0.5 kg / cm². / ui ¿¿i ¿ Another benefit of the thermoplastic composition of the present invention is that greater cold flexibility can be achieved without a negative impact on other mechanical properties, such as elongation at break and impact resistance. According to one or more embodiments, a shaped object containing the thermoplastic composition of the present invention has an elongation at break, determined according to ISO 527-2 at a temperature of 23°C, using a head speed greater than 100 mm / min, of at least 500%, preferably at least 650%, more preferably at least 750%, and / or an impact strength, determined according to EN 12691 Type A, of at least 1000 mm, preferably at least 1250 mm, and / or an impact strength, determined according to EN 12691 Type B, of at least 1000 mm, preferably at least 1250 mm. The elongation at break and the impact strength are measured with a shaped object containing the thermoplastic composition of the present invention and having a thickness of 0.8 mm. The preferences in the preceding text with respect to the butene-1 (co)polymer or (co)polymers, the ethylene-based block copolymer or copolymers, the heterophasic propylene copolymer or copolymers, the propylene-based elastomer or elastomers, and the flame retardant or retardants can be applied equally to all objects of the present invention, unless otherwise indicated. Another object of the present invention is the use of the thermoplastic composition according to the present invention to produce a shaped object, preferably a waterproofing membrane or a roofing membrane, in particular a roofing membrane. The thermoplastic composition of the present invention was found to be particularly suitable for use in the production of roofing membranes, given its high flexibility, especially at low temperatures. Furthermore, since optimal cold flexibility can be achieved without the use of rubbers or mineral oils, the thermoplastic composition of the present invention also exhibits low sticking and high stability at high temperatures. Another object of the present invention is a shaped object comprising a substrate layer, wherein the substrate layer comprises or is essentially composed of the thermoplastic composition according to the present invention. According to one or more embodiments, the substrate layer is a sheet-like element with a first main surface and a second main surface, separated from the first main surface by an intermediate thickness. Preferably, the sheet-like element has a length at least 5 times, preferably at least 10 times, plus MA / a / ZUZI z preferably at least 15 times greater than the thickness of the element. According to one or more modalities, the substrate layer has a thickness, determined according to DIN EN 1849-2, of 0.05 to 25 mm, preferably 0.1 to 15 mm, more preferably 0.1 to 10 mm, even more preferably 0.1 to 5 mm, even more preferably 0.25 to 5 mm, as well as 0.25 to 3.5 mm. The shaped object may further comprise a reinforcing layer. The reinforcing layer may be fully incorporated into the substrate layer or bonded directly or indirectly to one of the main surfaces of the substrate layer. It is understood that the term "fully incorporated" means that the reinforcing layer is completely covered by the matrix of the substrate layer. It is understood that the term "directly bonded" means that there is no other layer or substance present between the layers and that the opposite surfaces of the layers are directly bonded to each other. In the transition area between the two layers, the materials of the layers may also be present in a mixture with each other. The reinforcing layer and the substrate layer may be bonded indirectly to each other, for example, through a bonding layer, such as an adhesive layer. If used, the type of reinforcement layer is not specifically limited. For example, reinforcement layers typically used to improve the dimensional stability of roofing membranes can be used. Preferred reinforcement layers include nonwoven fabrics, woven fabrics, and nonwoven mesh, as well as combinations thereof. The term "nonwoven fabric" in this description refers to materials composed of fibers bonded together using chemical, mechanical, or thermal means, and which are not machine-woven or knitted. Nonwoven fabrics can be produced, for example, using a needle-punching or carding process, in which the fibers are mechanically interlaced to create a nonwoven fabric. In chemical bonding, chemical bonding agents, such as adhesives, are used to join the fibers together in a nonwoven fabric. The term "nonwoven mesh" in this description refers to net-like products that are not woven, consisting of overlapping threads chemically bonded together. Common materials for nonwoven mesh include metals, fiberglass, and plastics, particularly polyester, polypropylene, polyethylene, and polyethylene terephthalate (PET). According to one or more modalities, the reinforcing layer is composed of synthetic organic fibers, preferably selected from the group consisting of polyester fibers, polypropylene fibers, polyethylene fibers, nylon fibers, and polyamide fibers. ML / a / ZUZ 1 z According to one or more additional modalities, the reinforcing layer is composed of synthetic inorganic fibers, preferably selected from the group consisting of glass fibers, aramid fibers, wollastonite fibers and carbon fibers, most preferably glass fibers. According to one or more of the embodiments, the reinforcing layer is thermally laminated with one of the main surfaces of the substrate layer, in such a way as to provide a direct bond between the reinforcing layer and the substrate layer. The term "thermal lamination" refers to a process in which layers are bonded together by applying thermal energy. In particular, the term "thermal lamination" refers to a process comprising the partial fusion of at least one of the layers after the application of thermal energy, followed by a cooling stage, resulting in the formation of a physical bond between the layers, without the use of adhesive. Another object of the present invention is a method for producing a shaped object, wherein the method comprises the following steps: i) introducing the thermoplastic composition components of the present invention into an extrusion apparatus with an extruder and a nozzle, i) performing the melt processing of said components in the extruder and achieving extrusion of the melt-processed mixture through the extruder nozzle, to obtain an extrudable shaped melt, i) optionally using separate calender cooling rolls, through which the extruded shaped melt is transferred to stage i). Those skilled in the art are familiar with suitable extrusion equipment comprising at least an extruder and an extruder nozzle. Any conventional extruder can be used, for example, a piston extruder, a single-screw extruder, or a twin-screw extruder. Preferably, the extruder is a single-screw extruder, and more preferably a twin-screw extruder. The components of the thermoplastic composition can be supplied to the extruder in individual batches, such as a premix, a dry mix, or a master mix. Another object of the present invention is a method for coating a substrate, wherein the method comprises the following steps: I) placing a first and a second object shaped according to the present invention on the surface of the substrate to be covered, II) superimposing an edge area of ​​the second shaped object onto an overlapping part of the upper side of the first shaped object, III) Heat the edge area and overlap above the melting temperature of the thermoplastic composition and join the opposite surfaces of the edge area and overlap together under sufficient pressure to provide acceptable seam strength without using an adhesive. According to one or more modalities, the substrate that is covered with the sealing devices is a roofing substrate, preferably an insulating board, a vertical board, or an existing roofing membrane. Step III) of the method for coating a substrate can be performed manually, for example, using a hot air tool, or using an automatic welding device, such as an automatic hot air welding device, for example, the Sarnamatic® 661 welding device. The temperature to which the edge area of ​​the second shaped object and the overlapping portion of the first shaped object are heated depends on the arrangement of the first and second shaped objects, as well as whether Step III) is performed manually or using an automatic welding device. Preferably, the edge area of ​​the second shaped object and the overlapping portion of the first shaped object are heated to a temperature equal to or greater than 150°C, more preferably equal to or greater than 200°C. Another object of the present invention is a waterproofed structure, obtained using the method for covering a substrate. Examples The following materials were used in the example: ML / a / ZUZ 1 ÓZ I z Table 1 Borsoft SD233CF Random heterophasic ethylene / propylene copolymer, flexural modulus (ISO 178) of 400 MPa; Borealis AG Vistamaxx 6102 Propylene-based elastomer, ethylene content 15 to 16 wt%; ExxonMobil ATH AI(OH)3, > 99 wt%, dso particle size 1-2.5 pm; Albemarle Company Engage 8200 Ethylene-octene copolymer; Dow Chemical Company Queo 0203 Ethylene-based octene-1 plastomer; Borealis AG Koattro KT MR 05 Butene-1 copolymer; Lyondell Basell Infuse 9507 Ethylene-octene block copolymer; Dow Chemical Company Preparation of shaped objects The shaped objects (sheets) were produced using a laboratory-scale calendering-extrusion apparatus, which consisted of a twin-screw extruder (Berstorff GmbH), a flat nozzle, and a set of water-cooled calendering rollers. In the production of the shaped objects, the thermoplastic composition components illustrated in Table 2 were fed into the extruder hopper. The mixture underwent melt processing in the extruder and was extruded through a flat die into single-sheet flakes approximately 1.5 mm thick. Extrusion was carried out at an extrusion temperature of approximately 180°C. Flexibility The flexibility of shaped objects was determined by measuring the storage modulus (G') of the test sample at temperatures of -30°C, 0°C, and +30°C. The storage moduli were measured through dynamic mechanical analysis (DMA), using a method based on ISO 6721-10:2015. - a strain amplitude (gamma) of 0.1 to 1% - linear frequency of 1 Hz - normal force of -0.2 N - temperature from -50 to +30°C and - Temperature change rate of 2SC per minute. The storage module values ​​(G') presented in Table 2 were obtained from the test sample, taken from objects with a longitudinal shape. Tensile strength and elongation at break Tensile strength and elongation at break were measured according to ISO 527-2 at a temperature of 23SC, using a top head speed of 100 mm / min. The values ​​presented in Table 2 were obtained with the test sample, taken from objects with a longitudinal shape. Q l\ ch Table 2 Composition [% by weight] Ref-1 Ref-2 Ref-3 Ex.-1 Ex.-2 Ε].·3 Ref-4 Ref-5 Ex.-4 Ex.-5 Borsoft SD233CF 45.00 37.50 37.50 42.50 37.50 37.50 30.00 23.33 23.33 23.33 Vistamaxx 6102 55.00 47.50 47.50 52.50 47.50 47.50 36.67 30.00 30.00 30.00 ATH 33.33 33.33 33.33 33.33 Engage 8200 -- 15.00 - - - - - - - - Queo 0203 15.00 13.33 - Koattro KT MR 05 -- - - 5.00 15.00 - - - 13.33 - Infuse 9507 -- - - - - 15.00 - - - 13.33 Total 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 Properties Storage Module at -30°C [MPa] 338 318 280 257 247 233 625 470 300 380 at 0°C [MPa] 46 46 45 31 28 37 - - at +30°C [MPa] 24 26 24 17 15 20 38 33 21 28 Elongation at break [%] 907 893 927 920 943 911 - - - - Tensile strength at break [N / mm2] 14.5 9.9 12.3 13.9 14.5 12.4 - - - - CLAIMS

Claims

1. A thermoplastic composition comprising a polymeric component comprising: a) at least one butene-1 (co)polymer and / or at least one ethylene-based olefin block copolymer, b) at least one heterophasic propylene copolymer and c) at least one propylene-based elastomer, wherein the butene-1 (co)polymer or (co)polymers have a butene-1 derived unit content of at least 70% by weight, preferably at least 75% by weight.

2. The thermoplastic composition according to claim 1, wherein the butene-1 copolymer or copolymers have a flexural modulus at 23 SC, determined according to ISO 178, below 150 MPa, preferably below 125 MPa and / or a melting temperature, determined by DSC according to ISO 11357 using a heating rate of 2 sC / min, below 110 eC, preferably below 100 SC and / or a polydispersity index (Mw / Mn), determined by GPC, of ​​1.5 to 5, preferably 1.5 to 4.

5.

3. The thermoplastic composition according to claim 1 or 2, wherein the butene-1 (co)polymer or (co)polymers are a butene-1 homopolymer or a butene-1 copolymer with one or more α-olefins, preferably selected from the group consisting of ethylene and propylene.

4. The thermoplastic composition according to any of the preceding claims, wherein the ethylene-based olefin block copolymer or copolymers are an ethylene-α-olefin block copolymer, preferably an ethylene-octene block copolymer.

5. The thermoplastic composition according to any of the preceding claims, wherein the heterophasic propylene copolymer or copolymers have a flexural modulus at 23 SC, determined according to ISO 178, below 1000 MPa, preferably below 750 MPa and / or a cold soluble xylene (XCS) content, determined according to ISO 16152-2005, below 50% by weight, preferably below 45% by weight.

6. The thermoplastic composition according to any of the preceding claims, wherein the heterophasic propylene copolymer or copolymers are a heterophasic ethylene-propylene copolymer, preferably having an ethylene-derived unit content below 35% by weight, preferably below 30% by weight.

7. The thermoplastic composition according to any of the above embodiments, wherein the heterophasic propylene copolymer or copolymers are a heterophasic ethylene-propylene random copolymer.

8. The thermoplastic composition according to any of the above embodiments, wherein the heterophasic propylene copolymer or copolymers comprise at least 5% by weight, preferably at least 10% by weight of the total weight of the polymer component.

9. The thermoplastic composition according to any of the above embodiments, wherein the propylene-based elastomer or elastomers are propylene-ethylene copolymers having a propylene-derived unit content of 75 to 95% by weight, preferably 80 to 90% by weight, and an ethylene-derived unit content of 5 to 25% by weight, preferably 9 to 18% by weight.

10. The thermoplastic composition according to any of the above embodiments, wherein the propylene-based elastomer or elastomers have a flexural modulus at 23 SC, determined according to ISO 178, below 100 MPa, preferably below 50 MPa and / or a heat of fusion, determined by DSC using a heating rate of 10 s / min, below 80 J / g, preferably below 70 J / g and / or a cold-soluble xylene (XCS) content, determined according to ISO 16152-2005, of at least 75% by weight, preferably at least 85% by weight.

11. The thermoplastic composition according to any of the above modalities, wherein the composition is substantially devoid of tackifying resins.

12. The thermoplastic composition according to any of the above embodiments, further comprising 1 to 55% by weight, preferably 15 to 50% by weight of at least one flame retardant.

13. The use of the thermoplastic composition according to any of the preceding claims to produce a shaped object, preferably a waterproofing membrane or roofing.

14. A shaped object comprising a substrate layer comprising or essentially consisting of the thermoplastic composition according to any of claims 1 to 12.

15. A method for producing a shaped object comprising the following steps: i) introducing the thermoplastic composition components as defined in any one of claims 1 to 12 into an extrusion apparatus with an extruder and a nozzle, i) melt-processing said components in the extruder and extruding the melt-processed mixture through the extruder nozzle to obtain an extruded shaped melt, and iii) optionally using separate calender cooling rolls through which the extruded shaped melt is transferred to step i).

16. A method for coating a substrate comprising the following steps: I) placing a first and a second shaped object according to claim 14 on the surface of the substrate to be coated, II) overlapping an edge area of ​​one of the second shaped object onto an overlapping portion of the upper side of the first shaped object, III) heating the edge area and the overlapping portion above the melting temperature of the thermoplastic composition and joining the opposite surfaces of the edge area and the overlapping portion together with sufficient pressure to achieve acceptable seam strength without using an adhesive.