Highly transparent polymer compositions with improved stiffness and impact resistance

Abstract

The present application relates to a high transparent polymer composition with improved stiffness and impact resistance, comprising: a tailored crystalline resin (TCR) polymer comprising 99-99.4 wt% units derived from propylene and 0.6-1 wt% units derived from a comonomer selected from ethylene and C4-C 10 one or more alpha-olefins; and a clarifier which is a compound represented by the following formula (I): wherein R a and R b are each independently selected from the group consisting of unsubstituted or substituted aryl, unsubstituted or substituted alkylaryl, and unsubstituted or substituted arylalkyl; R c and R d are each independently selected from the group consisting of hydrogen or a non-hydrogen group. The polymer composition is a polypropylene-based material with both high transparency and high mechanical properties, and has a wide range of applications in the fields of vehicles and household appliances, etc.

Description

Technical Field

[0001] This application relates to polymer compositions, and more specifically, to highly transparent polymer compositions having improved rigidity and impact resistance, molded articles comprising the polymer, methods for manufacturing the molded articles, and uses of the polymer compositions for manufacturing the molded articles. Background Technology

[0002] With the development of automotive lightweighting and design aesthetics, the demand for transparent materials in automotive exterior components (such as lamp covers and decorative panels) and functional components (such as sensor covers and interior light guides) is increasing. At the same time, the packaging and home appliance industries are also continuously expanding their demand for low-cost, highly transparent plastics. While traditional transparent materials (such as polycarbonate and polymethyl methacrylate) offer excellent performance, their high cost, high processing energy consumption, and high density make them unsuitable for meeting the lightweighting requirements of automotive and household products. Therefore, engineers are turning their attention to polypropylene, the most widely used material in automobiles and home appliances, making the development of high-performance transparent polypropylene an important direction for the industry.

[0003] Currently, the most widely used commercial method for achieving transparent polypropylene is through blending random copolymer polypropylene. Introducing ethylene monomers disrupts crystallinity, improving transparency, but this often leads to a significant decrease in mechanical properties (such as rigidity and impact resistance). Another approach is to add a clearing agent (a special branch of nucleating agents). For example, a clearing agent is added to homopolymer or block copolymer polypropylene during the modification stage in post-processing. This refines the grain size, reduces light scattering, and thus improves transparency. However, current post-processing methods for adding clearing agents to general polypropylene grades have limited improvement on the transparency (especially haze) of polypropylene and also suffer from the same problem of mechanical property loss.

[0004] Therefore, the object of this invention is to provide a novel polypropylene-based polymer material that overcomes the shortcomings of the prior art, possessing both high transparency and high mechanical properties, particularly rigidity and impact resistance, thereby meeting the commercial requirements for highly transparent polypropylene materials. Summary of the Invention

[0005] In a first aspect, this disclosure provides a polymer composition comprising:

[0006] Custom crystalline resin (TCR) polymers, wherein the TCR polymer comprises 99-99.4 wt% propylene-derived units and 0.6-1 wt% units derived from comonomers, wherein the comonomers are selected from ethylene and C4-C based on the total weight of the TCR polymer. 10 One or more of α-olefins; and

[0007] A clarifying agent, wherein the clarifying agent is a compound represented by the following formula (I):

[0008]

[0009] in,

[0010] R a and R b Each is independently selected from unsubstituted or substituted aryl, unsubstituted or substituted alkylaryl, and unsubstituted or substituted arylalkyl;

[0011] R c and R d Each group is independently selected from hydrogen or non-hydrogen groups.

[0012] Secondly, this disclosure provides molded articles comprising polymer compositions as described in the context.

[0013] Thirdly, this disclosure provides a method for manufacturing a molded article as described in the context, the method comprising:

[0014] The components of a polymer composition are melt-mixed to form the polymer composition;

[0015] The polymer composition is molded to form a molded article.

[0016] Fourthly, this disclosure provides the use of polymer compositions, as described in the context, in the manufacture of molded articles.

[0017] Surprisingly, the polymer composition of this application exhibits high transparency, reflected by both high light transmittance and low haze, while also possessing excellent mechanical properties, particularly rigidity and impact resistance. Furthermore, this polymer composition is suitable for various molding methods, especially high-speed molding such as injection molding, greatly expanding the application areas of transparent polypropylene materials. This polymer composition can be widely used in a variety of applications, including vehicle parts, household appliance parts, electronic devices and components, medical devices and components, and packaging products. Attached Figure Description

[0018] Figure 1 A bar chart showing the transmittance and haze of the sample in Example 1 is displayed.

[0019] Figure 2 A radar graph showing the MFR, density, flexural modulus, flexural strength, tensile strength, and room temperature notched impact strength (RTNI) of the sample in Example 1 is displayed.

[0020] Figure 3 The bar chart shows the transmittance and haze of the sample in Example 2.

[0021] Figure 4The radar graphs showing the MFR, density, flexural modulus, flexural strength, tensile strength, and RTNI of the sample in Example 2 are displayed.

[0022] Figure 5 The bar chart shows the transmittance and haze of the sample in Example 3.

[0023] Figure 6 The radar plots show the MFR, density, flexural modulus, flexural strength, tensile strength, RTNI, and Charpy impact strength of the sample in Example 3.

[0024] Detailed Explanation

[0025] Definition and testing methods

[0026] Unless otherwise stated, the room temperature is 25°C.

[0027] As used herein, a “polymer” has two or more identical or different monomer units. A “homopolymer” is a polymer having identical monomer units. As used herein, the term “polymer” includes, but is not limited to, homopolymers, copolymers, terpolymers, etc. As used herein, the term “polymer” also includes impact, block, graft, random, and alternating copolymers. Unless otherwise specified, the term “polymer” should also include all possible geometries. Such geometries can include isotactic, syndiotactic, and random symmetric geometries.

[0028] As used herein, unless otherwise specified, the term "copolymer" refers to a polymer formed by the polymerization of at least two different monomers (i.e., monomer units). For example, the term "copolymer" includes the copolymerization product of propylene and α-olefins such as ethylene and 1-hexene. A "terpolymer" is a polymer having three monomer units that are different from each other. Therefore, the term "copolymer" also includes copolymer products of terpolymers and quaternary copolymers such as mixtures of ethylene, propylene, 1-hexene, and 1-octene.

[0029] As used herein, the terms “polypropylene,” “propylene polymer,” and “propylene-based polymer” refer to polymers or copolymers containing at least 50 mol% propylene units (preferably at least 70 mol% propylene units, more preferably at least 80 mol% propylene units, even more preferably at least 90 mol% propylene units, even more preferably at least 95 mol% propylene units or 100 mol% propylene units (in the case of homopolymers)).

[0030] As used in this article, “substantially isotopic” is defined as a quintuple that is at least 97% isotopic.

[0031] As used in this article, tailored crystallization resin (TCR) is a modified polypropylene containing higher molecular weight propylene and a mixture selected from ethylene and C4-C4 polymers. 10 In-situ reactor blends of random copolymers of α-olefins (preferably ethylene) with substantially isotactic homopolymers of lower molecular weight polypropylene, such as those described in U.S. Patent No. 4,950,720, which is incorporated herein by reference in its entirety. TCRs typically contain less than 1% by weight of a copolyolefin, and are sometimes referred to in a broader sense as homopolymers of polypropylene.

[0032] As used herein, polypropylene random copolymer (RCP) is defined as a copolymer of propylene with 1 to 10% by weight of an olefin selected from ethylene and C4-C8 α-olefins (preferably ethylene), having less than 10% isotactic pentads and syndiotactic pentads.

[0033] As used herein, the term "hydrocarbon group" refers to a group consisting only of hydrogen and carbon atoms. Hydrocarbon groups can be saturated / unsaturated, straight-chain or branched, cyclic or acyclic, aromatic or non-aromatic.

[0034] As used herein, the term "alkyl" refers to a saturated hydrocarbon group consisting of carbon and hydrogen atoms. Alkyl groups can be straight-chain, branched, cyclic, or substituted cyclic, or combinations thereof.

[0035] As used herein, the term "alkenyl" refers to an unsaturated hydrocarbon group that contains a C=C bond.

[0036] As used herein, the term "alkynyl" refers to an unsaturated hydrocarbon group that contains a C≡C bond.

[0037] As used herein, the term "aryl" refers to a hydrocarbon group that contains an aromatic ring structure.

[0038] As used herein, "aromatic" refers to a cyclic compound, ligand, or substituent ("ring") containing a cyclic cloud of delocalized π electrons above and below the plane of the "ring," and the π cloud must contain a total of 4n+2 π electrons, where n is an integer. As used herein, the term "aromatic" also refers to a pseudoaromatic heterocycle, which is a heterocyclic substituent having properties and structure (almost planar) similar to aromatic heterocyclic ligands, but is not aromatic by definition.

[0039] As used herein, the term "alkoxy" refers to an alkyl group bonded to an oxygen atom, such as an alkyl ether group bonded to an oxygen atom.

[0040] As used herein, the term "arylalkyl" means an aryl group in which the hydrogen has been replaced by an alkyl group or a substituted alkyl group. For example, 3,5'-di-tert-butyl-phenylindenyl is an indenyl group substituted with an arylalkyl group. When an arylalkyl group is a substituent on another group, it is attached to that group via the aryl group.

[0041] As used herein, the term "alkylaryl" means an alkyl group in which the hydrogen has been replaced by an aryl group or a substituted aryl group. For example, phenethylindenyl is an indenyl group substituted with an ethyl group. When an alkylaryl group is a substituent on another group, it is attached to that group via an alkyl group.

[0042] As used herein, a substituted group (such as a substituted hydrocarbon group) means a group in which at least one atom is replaced by a different atom or group. For example, a substituted alkyl group can be an alkyl group in which at least one hydrogen atom is replaced by a hydrocarbon group, a halogen, any other non-hydrogen group and / or at least one carbon atom and the hydrogen atom bonded thereto are replaced by a different group. The substituted group can be a group in which at least one hydrogen atom has been replaced by a heteroatom or a heteroatom-containing group, preferably by at least one functional group (e.g., halogens (Cl, Br, I, F), NR*2, OR*, SeR*, TeR*, PR*2, AsR*2, SbR*2, SR*, BR*2, SiR*3, GeR*3, SnR*3, PbR*3, etc.) or in which at least one heteroatom has been inserted into a hydrocarbon group (such as O, S, Se, Te, NR*, PR*, AsR*, SbR*, BR*, SiR*2, GeR*2, SnR*2, PbR*2, etc.), wherein R* is independently hydrogen, a hydrocarbon group, or a haloalkyl group.

[0043] Gel permeation chromatography (GPC)

[0044] Unless otherwise indicated, the moments and distributions of molecular weights (Mw, Mn, Mz, Mw / Mn, etc.), comonomer content, and branching index (g') were determined by high-temperature gel permeation chromatography (Polymer Char GPC-IR) using an infrared detector IR5 based on a multi-channel bandpass filter, an 18-angle light scattering detector, and a viscometer. vis The infrared detector integrated unit IR5, based on a multi-channel bandpass filter, has a coverage of approximately 2,700 cm. -1 - Approximately 3,000 cm -1The bandpass region (representing the saturated CH stretching vibration) was used. Polymer separation was achieved using three Agilent PLgel 10-μm mixed-B LS columns. Reagent-grade 1,2,4-trichlorobenzene (TCB) (from Sigma-Aldrich) containing ~300 ppm of the antioxidant butylated hydroxytoluene (BHT) was used as the mobile phase at a nominal flow rate of ~1.0 mL / min and a nominal injection volume of ~200 μL. The entire system, including the transfer lines, columns, and detector, was housed in an oven maintained at ~145 °C. A given sample volume was weighed and sealed in a standard vial, to which ~10 μL of a flow marker (heptane) was added. After loading the vial into the autosampler, the oligomer or polymer was dissolved in the instrument with ~8 mL of added TCB solvent using continuous shaking at ~160 °C. Sample solution concentrations ranged from ~0.2 to ~2.0 mg / mL, with lower concentrations used for higher molecular weight samples. The concentration (c) at each point in the chromatogram can be calculated from the baseline-subtracted IR5 broadband signal (I) using the equation: c = αI, where α is a mass constant determined using polyethylene or polypropylene standards. Mass recovery can be calculated from the ratio of the integrated area within the eluent volume to the injection mass (which equals the predetermined concentration multiplied by the injection loop volume). Conventional molecular weight (IR MW) is determined by combining a universal calibration relationship with column calibration (which uses a range of monodisperse polystyrene (PS) standards ranging from 700 to 10 M g / mol). MW is calculated at each eluent volume using the following equation:

[0045]

[0046] Variables with the subscript "PS" represent polystyrene, while those without subscripts represent the test sample. In this method, α PS =0.67 and K PS =0.000175. For calculations of α and K for other materials disclosed in the literature (Sun, T. et al., Macromolecules 2001, Vol. 34, p. 6812), except for the purposes of this invention and its claims, for ethylene-propylene copolymers α = 0.695 + (0.01 * (propylene weight fraction)) and K = 0.000579 - (0.0003502 * (propylene weight fraction)), for other linear ethylene polymers α = 0.695 and K = 0.000579, and for linear propylene polymers α = 0.705 and K = 0.0002288. Unless otherwise stated, concentrations are expressed in g / cm³. 3 The units are expressed as follows: molecular weight is expressed in g / mol, and intrinsic viscosity (and therefore K in the Mark-Houwink equation) is expressed in dL / g.

[0047] The comonomer composition was determined by the ratio of the IR5 detector intensities corresponding to the CH2 and CH3 channels (calibrated using a series of PE and PP homopolymer / copolymer standards pre-nominated by NMR or FTIP). Specifically, this provides methyl groups per 1,000 total carbons as a function of molecular weight (CH3 / 1000TC). The short-chain branching (SCB) content per 1000TC as a function of molecular weight (SCB / 1000TC) was then calculated by applying chain-end correction to the CH3 / 1000TC function, assuming each chain is linear and capped at each end with a methyl group. The weight % comonomer was then obtained from the following expression, where f is 0.3, 0.4, 0.6, 0.8, etc., for comonomers such as C3, C4, C6, and C8, respectively:

[0048] w2 = f * SCB / 1000TC

[0049] The bulk composition of the polymer from GPC-IR and GPC-4D analyses was obtained by considering the entire signal of the CH3 and CH2 channels between the integration limits of the concentration chromatogram. First, the following ratios were obtained...

[0050]

[0051] Then, a calibration with the same CH3 and CH2 signal ratios (as previously mentioned in obtaining CH3 / 1000TC as a function of molecular weight) is applied to obtain the bulk CH3 / 1000TC. The bulk methyl end / 1000TC (bulk CH3 end / 1000TC) is obtained by weighted average chain-end correction over the molecular weight range.

[0052] w2b=f*body CH3 / 1000TC;

[0053] Body SCB / 1000TC = Body CH3 / 1000TC - Body CH3 end / 1000TC, and transform body SCB / 1000TC into body w2 in the same manner as described above.

[0054] The LS detector used was an 18-angle Wyatt Technology High Temperature DAWNHELEOS II. The LS molecular weight (M) at each point in the chromatogram was determined by analyzing the LS output using a Zimm model for static light scattering (Light Scattering from Polymer Solutions, Hugl in, MB, edited, Academic Press, 1972).

[0055]

[0056] Here, ΔR(θ) is the excess Rayleigh scattering intensity measured at scattering angle θ, c is the polymer concentration determined from IR5 analysis, A2 is the second virial coefficient, P(θ) is the shape factor of the monodisperse random coil, and K... o These are the optical constants of the system:

[0057]

[0058] Where N A is Avogadro's constant, and (dn / dc) is the refractive index increment of the system. The refractive index of TCB at 145 °C and λ = 665 nm is n = 1.500. Furthermore, for ethylene polymers, A2 = 0.0015 and dn / dc = 0.104, while for propylene polymers, A2 = 0.0006 and dn / dc = 0.104.

[0059] Specific viscosity is determined using a high-temperature Agilent (or Viscotek Corporation) viscometer, which has four capillaries arranged in a Wheatstone bridge configuration and two pressure sensors. One sensor measures the total pressure drop across the detector, and the other sensor, placed between the two sides of the bridge, measures the pressure difference. The specific viscosity η of the solution flowing through the viscometer is calculated from their outputs. s The intrinsic viscosity [η] at each point in the chromatogram is calculated using the equation [η] = ηs / c, where c is the concentration and is measured by the IR5 broadband channel output. The viscosity (MW) at each point is calculated as follows: Where α ps It is 0.67 and K ps It is 0.000175.

[0060] The branching index (g') is calculated using the output of the GPC-IR5-LS-VIS method as follows. vis The average intrinsic viscosity of the sample [η]. avg Through the following calculations:

[0061]

[0062] The sum is taken from all chromatographic slices i between the integration limits. Branching index g' vis Defined as Where Mv is the viscosity-average molecular weight based on the molecular weight determined by LS analysis, and K and α, for the purposes of this invention and its claims, are α = 0.705 and K = 0.0002288 for a linear propylene polymer. Unless otherwise stated, concentrations are expressed in g / cm³. 3 The units are expressed as follows: molecular weight is expressed in g / mol, and intrinsic viscosity (and therefore K in the Mark-Houwink equation) is expressed in dL / g.

[0063] In one aspect, this disclosure provides polymer compositions comprising a custom crystalline resin (TCR) polymer and a clarifying agent.

[0064] Customized crystalline resin polymers have the same meaning as the customized crystalline resins mentioned above, and the two can be used interchangeably.

[0065] In one embodiment, the TCR polymer comprises 99-99.4 wt% propylene-derived units and 0.6-1 wt% units derived from comonomers, wherein the comonomers are selected from ethylene and C4-C based on the total weight of the TCR polymer. 10 One or more of α-olefins.

[0066] For example, the content of units derived from comonomers can be within the range of any point from 0.6, 0.61, 0.62, 0.63, 0.64, 0.65, 0.66, 0.67, 0.68, 0.69, 0.7 wt% to any point from 1, 0.98, 0.95, 0.92, 0.9, 0.88, 0.85, 0.82, 0.8, 0.78, 0.75, 0.72, 0.7 wt%, as long as the lower limit is less than the upper limit.

[0067] For example, the content of units derived from propylene can be within the range from any point among 99, 99.02, 99.05, 99.08, 99.1, 99.12, 99.15, 99.18, 99.2, 99.22, 99.25, 99.28, 99.3 wt% to any point among 99.4, 99.39, 99.38, 99.37, 99.36, 99.35, 99.34, 99.33, 99.32, 99.31, 99.3 wt%, as long as the lower limit is less than the upper limit.

[0068] Generally, for propylene-based copolymers, increasing the amount of comonomer helps increase the transparency of the material, but excessive comonomer content can impair the mechanical properties of the material. The TCR polymer used in this invention, due to its specific comonomer content, can provide a material that combines high transparency and excellent mechanical properties.

[0069] In a preferred embodiment, the comonomer is selected from one or more of ethylene, 1-butene, and 1-hexene, preferably ethylene, 1-butene, or 1-hexene, and more preferably ethylene.

[0070] In one embodiment, the TCR polymer has a melt flow rate of 5-35 g / 10 min at 230 °C and 2.16 kg, as determined according to ASTM D1238.

[0071] For example, the melt flow rate of the TCR polymer at 230°C and 2.16 kg can be within the range from any point among 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20 g / 10 min to any point among 35, 34, 33, 32, 31, 30, 29, 28, 27, 26, 25, 24, 23, 22, 21, 20 g / 10 min, as long as the lower limit is less than the upper limit.

[0072] In one preferred embodiment, the TCR polymer has a melt flow rate of 10-30 g / 10 min at 230 °C and 2.16 kg. In another preferred embodiment, the TCR polymer has a melt flow rate of 15-25 g / 10 min at 230 °C and 2.16 kg.

[0073] The TCR polymer used in this invention has a high melt flow rate, which is of great significance in end applications, such as enabling the fabrication of larger parts, reducing the time required for processing and molding, and lowering processing costs, thereby significantly broadening the application of the material.

[0074] In one embodiment, the TCR polymer also has one or more of the following characteristics:

[0075] (i) A number-average molecular weight (Mn) of 8,000 g / mol to 100,000 g / mol, preferably 10,000 g / mol to 80,000 g / mol, preferably 20,000 g / mol to 60,000 g / mol, preferably 30,000 g / mol to 50,000 g / mol;

[0076] (ii) a weight-average molecular weight (Mw) of 100,000 g / mol to 500,000 g / mol, preferably 120,000 g / mol to 400,000 g / mol, preferably 150,000 g / mol to 300,000 g / mol, preferably 180,000 g / mol to 250,000 g / mol;

[0077] (iii) A z-average molecular weight (Mz) of 300,000 g / mol to 1,000,000 g / mol, preferably 400,000 g / mol to 900,000 g / mol, preferably 500,000 g / mol to 800,000 g / mol, preferably 550,000 g / mol to 700,000 g / mol;

[0078] (iv) 2 to 8, preferably 2.5 to 7.5, preferably 3 to 7, preferably 4 to 6 polydispersity index (Mw / Mn);

[0079] (v)≥0.95, preferably≥0.97, preferably≥0.99, preferably a branching index g' of approximately 1;

[0080] (vi) an intrinsic viscosity of 0.8 dL / g to 2 dL / g, preferably 0.9 dL / g to 1.8 dL / g, preferably 1 dL / g to 1.6 dL / g, and preferably 1.1 dL / g to 1.3 dL / g;

[0081] (vii) 0.880 g / cm 3 -0.910g / cm 3 The preferred value is 0.890 g / cm³. 3 Up to 0.910 g / cm 3 The preferred value is 0.895 g / cm³. 3 -0.905g / cm 3 0.900g / cm 3 -0.905g / cm 3 The density.

[0082] In one embodiment, the TCR polymer can be produced using any technology known in the art for producing olefin polymers, such as solution polymerization, slurry polymerization, or gas-phase polymerization, with liquid-phase polymerization being the preferred technology. Typically, the TCR polymer is produced using a Ziegler-Natta catalyst.

[0083] Suitable TCR polymers are commercially available under the trade name Exxonmobil PP1264. It contains 0.7% by weight of ethylene-derived units and has a melt flow rate of 20 g / 10 min at 230 °C and 2.16 kg, and a melt flow rate of 0.900 g / cm³. 3 The density.

[0084] In one embodiment, the transparent agent may be a compound represented by the following formula (I):

[0085]

[0086] in,

[0087] R a and R b Each is independently selected from unsubstituted or substituted aryl, unsubstituted or substituted alkylaryl, and unsubstituted or substituted arylalkyl;

[0088] R c and R d Each group is independently selected from hydrogen or non-hydrogen groups.

[0089] In a preferred embodiment, in formula (I),

[0090] R a and Rb Each is independently selected from C6-C 40 Unsubstituted or substituted aryl, C7-C 40 Unsubstituted or substituted alkylaryl and C7-C 40 Unsubstituted or substituted arylalkyl; preferably, R a and R b Each is independently selected from C6-C 24 Unsubstituted or substituted aryl, C7-C 30 Unsubstituted or substituted alkylaryl and C7-C 30 Unsubstituted or substituted arylalkyl; preferably, each substituent is independently selected from fluoroalkyl, alkenyl, alkyl, alkynyl, alkoxy, ester, halogen and phenyl, wherein any two adjacent substituents are optionally combined to form a cyclic group;

[0091] R c and R d Each is independently selected from hydrogen, unsubstituted or substituted alkyl, unsubstituted or substituted alkenyl, unsubstituted or substituted alkoxy; preferably, R c and R d Each is independently selected from hydrogen, C1-C 12 Unsubstituted or substituted alkyl, C2-C 12 Unsubstituted or substituted alkenyl groups, C1-C 12 Unsubstituted or substituted alkoxy groups; preferably, R c and R d Each substituent is independently selected from hydrogen, C1-C6 unsubstituted or substituted alkyl, C2-C6 unsubstituted or substituted alkenyl, and C1-C6 unsubstituted or substituted alkoxy; preferably, each substituent is independently selected from halogen or hydroxyl.

[0092] In one embodiment, the transparent agent is a compound represented by formula (II):

[0093]

[0094] in,

[0095] R is selected from non-hydrogen groups;

[0096] R1, R2, R3, R4, and R5 are each independently selected from hydrogen, fluoroalkyl, alkenyl, alkyl, alkynyl, alkoxy, ester, halogen, and phenyl, wherein any two adjacent groups may optionally be combined to form a cyclic group.

[0097] n is 0, 1, or 2.

[0098] In a preferred embodiment, in formula (II),

[0099] R is selected from alkenyl, alkyl, alkoxy, hydroxyalkyl, and haloalkyl; preferably, R is selected from C2-C.12 alkenyl (e.g., C2-C6 alkenyl, C3-C6 alkenyl), C1-C 12 Alkyl groups (e.g., C2-C6 alkyl, C3-C6 alkyl), C1-C 12 Alkoxy groups (e.g., C2-C6 alkoxy, C3-C6 alkoxy), C1-C 12 Hydroxyalkyl groups (e.g., C2-C6 hydroxyalkyl, C3-C6 hydroxyalkyl) and C1-C 12 Haloalkyl groups (e.g., C2-C6 haloalkyl groups, C3-C6 haloalkyl groups); and / or

[0100] R1, R2, R3, R4, and R5 are each independently selected from hydrogen, C1-C 12 Fluorinated hydrocarbon groups (e.g., C2-C6 fluorocarbon groups, C3-C6 fluorocarbon groups), C2-C 12 alkenyl (e.g., C2-C6 alkenyl, C3-C6 alkenyl), C1-C 12 Alkyl groups (e.g., C2-C6 alkyl, C3-C6 alkyl), C2-C 12 Alkynyl (e.g., C2-C6 alkynyl, C3-C6 alkynyl), C1-C 12 Alkoxy groups (e.g., C2-C6 alkoxy, C3-C6 alkoxy), ester groups, halogen groups, and phenyl groups; and / or

[0101] n is 1 or 2.

[0102] In a preferred embodiment, in formula (II),

[0103] R is selected from allyl and propyl; and / or

[0104] R1, R2, R3, R4, and R5 are each independently selected from hydrogen, allyl, and propyl; and / or

[0105] n is 1.

[0106] Compounds of formula (I) can be formed by reacting 1 mole of a polyol compound (such as sorbitol or xylitol) with about 2 moles of an aldehyde to form an acetal compound, as described in US5049605A, US5198484A, and US6586007B2, which are incorporated herein by reference; or, for example, for compounds of formula (II), by reacting a polyol compound (such as sorbitol or xylitol) with an olefin molecule to form a first compound, and then by reacting the first compound with an aromatic aldehyde in a condensation reaction to form an acetal compound, as described in WO2009025728A1, which is incorporated herein by reference in its entirety.

[0107] Suitable clarifying agents can be purchased from Milliken under the trade names Millad NX8000, Millad3988, and Millad 3940, or from Cheng Ho Technology under the trade names NA98G and NA98L.

[0108] In a preferred embodiment, the transparent agent is Millad NX8000.

[0109] In one embodiment, the amount of the clarifying agent is 2000-6000 ppm, based on the total weight of the polymer composition.

[0110] For example, the amount of transparent agent can be within a range from any point of 2000, 2500, 3000, 3500, 4000, 4500 ppm to any point of 6000, 5500, 5000, 4500 ppm, as long as the lower limit is less than the upper limit. If the transparent agent content is too low, the desired light transmittance and haze will not be achieved; if the transparent agent content is too high, the light transmittance and haze will not be further improved, but will instead lead to an increase in material costs.

[0111] In a preferred embodiment, the amount of the clearing agent is 3000-5000 ppm, more preferably 3500-5000 ppm, and even more preferably 4000-5000 ppm. Surprisingly, it has been found that when the amount of the clearing agent is within this higher range, not only can the desired light transmittance and haze be achieved, but stiffness and impact resistance can also be significantly improved, thereby achieving a polypropylene material that combines excellent transparency and mechanical properties.

[0112] In one embodiment, the polymer composition of the present invention may further comprise other polymers, including polypropylene, such as homopolymer polypropylene and copolymer polypropylene (e.g., RCP), polyethylene, polystyrene, polycarbonate, polymethacrylate, elastomers such as ethylene-based elastomers and propylene-based elastomers, cyclic olefin copolymers, etc. For example, the polymer composition of the present invention may comprise a TCR polymer, homopolymer polypropylene, and an elastomer, wherein the weight ratio of the TCR polymer to the total amount of homopolymer polypropylene and elastomer is 2:8 to 8:2, for example 3:7 to 7:3, 4:6 to 6:4.

[0113] In one embodiment, the polymer composition of the present invention may further contain an effective amount of stabilizer to prevent color formation. Many such stabilizers are known in the art, any of which may be used in the present invention. Preferred stabilizers include phosphorus oxyacids, acidic organophosphates, acidic metal phosphates, and mixtures thereof.

[0114] In one embodiment, the polymer composition of the present invention may further comprise an effective amount of a colored pigment. A variety of colored pigments for use with polyolefins are known in the art, any of which may be used. Pigments that may be used in the present invention include phthalocyanine blue, phthalocyanine green, anthraquinone dyes, carmine 2b lake, azo compounds, acidic azo pigments, quinacridones, halogenated phthalocyanines, quinoline, heterocyclic dyes, etc. Ketone dyes, anthraquinone dyes, polymethyst pigments and mixtures thereof.

[0115] In one embodiment, the polymer composition of the present invention may also be combined with additional additives or compounds to provide a composition having specific, desired properties. Many such additives and compounds are known in the art. Those skilled in the art are familiar with how to use suitable additives or compounds. Examples of such substances include UV stabilizers, antioxidants, light stabilizers, flame retardants, antistatic agents, biocides, viscosity reducers, impact modifiers, plasticizers, fillers, reinforcing agents, lubricants, release agents, foaming agents, nucleating agents, etc.

[0116] Secondly, this disclosure provides molded articles comprising the polymer compositions of the present invention.

[0117] In one embodiment, the molded article is formed from the polymer composition of the present invention.

[0118] Thirdly, this disclosure provides a method for manufacturing the molded article of the present invention, the method comprising:

[0119] The components of a polymer composition are melt-mixed to form the polymer composition;

[0120] The polymer composition is molded to form a molded article.

[0121] In one embodiment, the melt mixing step can be performed by any means or equipment known to those skilled in the art for melt mixing materials with thermoplastics. Such equipment may include, but is not limited to, a Banbury internal mixer, a Buss co-kneader, a Farrel continuous internal mixer, a planetary extruder, a single-screw extruder, a co-rotating multi-screw extruder, a counter-rotating multi-screw extruder, a co-rotating meshing extruder, or a ring extruder.

[0122] In one embodiment, the molding is achieved by injection molding, compression molding, extrusion molding, blow molding, or thermoforming.

[0123] Surprisingly, the polymer compositions of the present invention can be processed particularly well by high-speed molding methods such as injection molding, and can form thick-walled articles (e.g., thickness ≥2 mm, ≥2.5 mm, or ≥3 mm). These thick-walled articles possess both excellent transparency and mechanical properties, which greatly expands the application areas of transparent polypropylene materials. Furthermore, the high melt flow rate of the polymer compositions of the present invention enables good processability, improved processing efficiency, and reduced costs regardless of the molding method used.

[0124] Fourthly, this disclosure provides the use of the polymer compositions of the present invention in the manufacture of molded articles.

[0125] In one embodiment, the molded articles include vehicle parts, household appliance parts, electronic devices and their components, medical devices and their components, and packaging articles. Vehicle parts include, for example, automotive interior parts such as dashboard covers, ambient lighting guides, and button / knob covers; automotive exterior functional parts such as side turn signal covers, charging port covers, and rearview mirror housings; subway / bus handrail covers; high-speed rail window inner layers; aircraft window inner covers; and ship instrument panels. Household appliance parts include, for example, transparent panels / covers such as microwave oven doors and air fryer viewing windows; button / touchscreen covers such as washing machine control panels and induction cooker touch areas; storage containers such as refrigerator drawers and food storage containers; lamp covers / light guides such as water purifier indicator lights and humidifier light strips; and water pipes / tanks such as water dispenser tanks and coffee machine water lines.

[0126] Unless otherwise stated, all numerical values ​​used in this specification and the related claims to represent quantities of ingredients, properties such as molecular weight, reaction conditions, etc., should be understood to be modified by the term "about" in all cases. Therefore, unless the contrary is indicated, the numerical parameters listed in the following specification and the appended claims are approximate values ​​and may vary depending on the desired properties sought to be obtained by the embodiment of the invention. At least, and not as an attempt to limit the application of the doctrine of equivalents to the scope of the claims, each numerical parameter should be interpreted based at least on the reported significant figures and by applying ordinary rounding techniques.

[0127] This document presents one or more illustrative embodiments including one or more inventive elements. For clarity, not all features of the physical implementation are described or shown in this application. It should be understood that in the development of physical embodiments including one or more elements of the present invention, many implementation-specific decisions must be made to achieve the developer's objectives, such as complying with system-related, business-related, governmental-related, and other constraints, which vary from time to time as implementation progresses. While the developer's efforts may be time-consuming, such efforts are a routine task for those skilled in the art who benefit from this disclosure.

[0128] While compositions and methods are described herein with respect to “comprising” various components or steps, they may also be described as “consistently composed of various components and steps” or “components of various components and steps.” In the context of compositions, “consistently…” composition allows for 25 ppm or less of impurities (each).

[0129] Other implementation plans

[0130] The present invention also relates to the following embodiments.

[0131] 1. A polymer composition comprising:

[0132] Custom crystalline resin (TCR) polymers, wherein the TCR polymer comprises 99-99.4 wt% propylene-derived units and 0.6-1 wt% units derived from comonomers, wherein the comonomers are selected from ethylene and C4-C based on the total weight of the TCR polymer. 10 One or more of α-olefins; and

[0133] A clarifying agent, wherein the clarifying agent is a compound represented by the following formula (I):

[0134]

[0135] in,

[0136] R a and R b Each is independently selected from unsubstituted or substituted aryl, unsubstituted or substituted alkylaryl, and unsubstituted or substituted arylalkyl;

[0137] R c and R d Each group is independently selected from hydrogen or non-hydrogen groups.

[0138] 2. The polymer composition according to embodiment 1, wherein the TCR polymer comprises 99.05-99.4% by weight of propylene-derived units and 0.6-0.95% by weight of comonomer-derived units, based on the total weight of the TCR polymer, and / or the TCR polymer has a melt flow rate of 5-35 g / 10 min at 230°C and 2.16 kg.

[0139] 3. The polymer composition according to embodiment 1, wherein the TCR polymer comprises 99.2-99.4% by weight of propylene-derived units and 0.6-0.8% by weight of ethylene-derived units, based on the total weight of the TCR polymer, and / or the TCR polymer has a melt flow rate of 10-30 g / 10 min at 230°C and 2.16 kg.

[0140] 4. The polymer composition according to embodiment 1, wherein in formula (I),

[0141] R a and R b Each is independently selected from C6-C 40 Unsubstituted or substituted aryl, C7-C 40 Unsubstituted or substituted alkylaryl and C7-C 40 Unsubstituted or substituted arylalkyl groups, wherein each substituent is independently selected from fluoroalkyl, alkenyl, alkyl, alkynyl, alkoxy, ester, halogen, and phenyl groups, wherein any two adjacent substituents are optionally combined to form a cyclic group; and / or

[0142] R c and R d Each is independently selected from hydrogen, C1-C 12 Unsubstituted or substituted alkyl, C2-C 12 Unsubstituted or substituted alkenyl groups, C1-C 12 Unsubstituted or substituted alkoxy groups, with each substituent independently selected from halogen or hydroxyl groups.

[0143] 5. The polymer composition according to embodiment 1, wherein the transparent agent is a compound represented by formula (II):

[0144]

[0145] in,

[0146] R is selected from non-hydrogen groups;

[0147] R1, R2, R3, R4, and R5 are each independently selected from hydrogen, fluoroalkyl, alkenyl, alkyl, alkynyl, alkoxy, ester, halogen, and phenyl, wherein any two adjacent groups may optionally be combined to form a cyclic group.

[0148] n is 0, 1, or 2.

[0149] 6. The polymer composition according to embodiment 5, wherein in formula (II),

[0150] R is selected from alkenyl, alkyl, alkoxy, hydroxyalkyl, and haloalkyl; and / or

[0151] R1, R2, R3, R4, and R5 are each independently selected from hydrogen, C1-C 12 Fluorinated hydrocarbon group, C2-C 12 alkenyl, C1-C 12 Alkyl, C3-C 12 Alkyne group, C1-C 12 Alkoxy, ester, halogen, and phenyl groups; and / or

[0152] n is 1 or 2.

[0153] 7. The polymer composition according to embodiment 5, wherein in formula (II),

[0154] R is selected from allyl and propyl; and / or

[0155] R1, R2, R3, R4, and R5 are each independently selected from hydrogen, allyl, and propyl; and / or

[0156] n is 1.

[0157] 8. The polymer composition according to embodiment 1, wherein the amount of the transparent agent is 2000-6000 ppm, based on the weight of the TCR polymer.

[0158] 9. The polymer composition according to embodiment 1, wherein the amount of the transparent agent is 3000-5000 ppm, based on the weight of the TCR polymer.

[0159] 10. The polymer composition according to embodiment 1, wherein the TCR polymer is Exxonmobil PP1264, and / or the clarifying agent is Millad NX8000.

[0160] 11. A molded article comprising the polymer composition according to any one of embodiments 1-10.

[0161] 12. A method for manufacturing a molded article according to embodiment 11, the method comprising:

[0162] The components of a polymer composition are melt-mixed to form the polymer composition;

[0163] The polymer composition is molded to form a molded article.

[0164] 13. The method according to embodiment 12, wherein the molding is achieved by injection molding, compression molding, extrusion molding, blow molding or thermoforming.

[0165] 14. Use of the polymer composition according to any one of embodiments 1-10 for manufacturing molded articles.

[0166] 15. The molded article according to embodiment 11, the method according to embodiment 12, or the use according to embodiment 14, wherein the molded article includes vehicle parts, household appliance parts, electronic devices and components thereof, medical devices and components thereof, and packaging articles. Detailed Implementation

[0167] To facilitate a better understanding of embodiments of the present invention, the following preferred or representative embodiments are provided. These embodiments should not be construed as limiting or restricting the scope of the invention.

[0168] Example

[0169] Test methods

[0170] 1. Light transmittance

[0171] Examples 1-2 were measured according to the Exxonmobil standard based on ASTM 1003, and Example 3 was measured according to the ASTM 1003 standard. The two standards used the same instruments and test methods; the difference lay in the baseline.

[0172] 2. Haze

[0173] Examples 1-2 were measured according to the Exxonmobil standard based on ASTM 1003, and Example 3 was measured according to the ASTM 1003 standard. The two standards used the same instruments and test methods; the difference lay in the baseline.

[0174] 3. Density

[0175] Measured according to ISO 1183 standard.

[0176] 4. Melt Flow Rate (MFR)

[0177] Measured according to ISO 1133 standard.

[0178] 5. Flexural modulus

[0179] Measured according to ISO 178 standard.

[0180] 6. Bending strength

[0181] Measured according to ISO 178 standard.

[0182] 7. Tensile strength

[0183] Measured according to ISO 527 standard.

[0184] 8. Room temperature notched impact strength (RTNI)

[0185] Measured according to ISO 180 standard.

[0186] 9. Impact strength of simply supported beams (Charpy)

[0187] Measured according to ISO 179 standard.

[0188] Table 1 shows the raw materials used in the examples.

[0189] Table 1 describes the raw materials used in the examples.

[0190]

[0191]

[0192] Example 1

[0193] This embodiment is intended to evaluate the effect of the type of transparent agent on the properties of polypropylene.

[0194] PP1264 was melt-blended with 2000 ppm (based on the weight of PP1264) of the clarifying agents NX8000, NA98G, and NA98L in a Lester Ritz TSE 40mm twin-screw extruder at 200°C, extruded, and granulated underwater to obtain granular compositions. These granular compositions were then melt-blended in a Haitian injection molding machine at 200°C and injection-molded into standard thickness plates of 2.0 mm, 2.5 mm, and 3.0 mm, with a length of 150 mm and a width of 100 mm for each plate. The transmittance and haze of each sample were tested, and the results are shown in Table 2. Figure 1 As shown.

[0195] In addition, each composition was prepared into a standard test sample under the sample preparation conditions specified in the corresponding standard test method. Then, the MFR, density, flexural modulus, flexural strength, tensile strength, and RTNI of each sample were tested according to the standard test method. The results are as follows: Figure 2 As shown.

[0196] Table 2. Transmittance and haze of the samples in Example 1

[0197]

[0198]

[0199] From Table 2 and Figure 1 The results show that the transmittance of each sample is relatively similar, with no significant difference even among thicker samples. However, in terms of haze, the use of NX8000 resulted in a significant reduction in haze compared to NA98G and NA98L, indicating that NX8000 has a better transparency improvement effect in reducing haze.

[0200] In addition, from Figure 2 The results show that the MFR, density, and mechanical properties of the three samples are quite similar.

[0201] Example 2

[0202] This embodiment is intended to evaluate the effect of the content of the clarifying agent on the properties of polypropylene.

[0203] PP1264 was melt-blended with 2000 ppm and 4500 ppm (based on the weight of PP1264) of the clarifying agent NX8000 in a Lesterlitz TSE 40mm twin-screw extruder at 200°C, extruded, and granulated underwater to obtain granular compositions. These granular compositions were then melt-blended in a Haitian injection molding machine at 200°C and injection-molded into standard thickness plates of 2.0 mm, 2.5 mm, and 3.0 mm, with a length of 150 mm and a width of 100 mm for each plate. The transmittance and haze of each sample were tested, and the results are shown in Table 3. Figure 3 As shown.

[0204] In addition, each composition was prepared into a standard test sample under the sample preparation conditions specified in the corresponding standard test method. Then, the MFR, density, flexural modulus, flexural strength, tensile strength, and RTNI of each sample were tested according to the standard test method. The results are as follows: Figure 4 As shown.

[0205] Table 3. Transmittance and haze of the samples in Example 2

[0206]

[0207]

[0208] From Table 3 and Figure 3 The results show that increasing the clearing agent content to 4500 ppm, compared to an addition of 2000 ppm NX8000, significantly improved haze, especially for thicker sheets. Furthermore, from... Figure 4 The results show that increasing the content of the transparent agent significantly improves the flexural modulus and impact strength of the material, indicating a significant improvement in rigidity and impact resistance, which is very beneficial for expanding the application fields of the material.

[0209] Example 3

[0210] This embodiment is intended to compare the formulation of the present invention with commercially available advanced modified polypropylene blend formulations.

[0211] The control composition is a commercially available advanced modified polypropylene blend formulation for automotive trim strips, consisting of a blend of 50% (ordinary homopolymer polypropylene + elastomer) and 50% commercially available clear homopolymer polypropylene, and also containing a clearing agent.

[0212] The composition of the present invention replaces the high-transparency homopolymer polypropylene in the control composition with PP1264, and adds 4500 ppm (based on the weight of PP1264) of the clearing agents NX8000, NA98G and NA98L respectively.

[0213] Each composition was injection molded into standard thickness plates of 2.0 mm, 2.5 mm, and 3.0 mm. The transmittance and haze of each sample were tested, and the results are shown in Table 4. Figure 5 As shown.

[0214] In addition, each composition was prepared into a standard test sample under the sample preparation conditions specified in the corresponding standard test method. Then, the MFR, density, flexural modulus, flexural strength, tensile strength, Shalpe impact strength, and RTNI of each sample were tested according to the standard test method. The results are as follows: Figure 6 As shown.

[0215] Table 4. Transmittance and haze of the samples in Example 3

[0216]

[0217]

[0218] From Table 4 and Figure 5 The results show that PP1264+NX8000, PP1264+NA98G, and PP1264+NA98L all exhibit better appearance performance than commercially available formulations, as evidenced by higher light transmittance and lower haze. Furthermore, from... Figure 6 The results show that the mechanical properties of PP1264+NX8000, PP1264+NA98G and PP1264+NA98L are comparable to those of commercially available compound formulations.

[0219] Therefore, the present invention is highly suitable for achieving the results and advantages mentioned and inherent therein. The specific embodiments and constructions disclosed above are merely illustrative, as it will be apparent to those skilled in the art, who benefit from the teachings herein, that different but equivalent means can be employed to modify and implement the invention. Furthermore, the details of the constructions or designs shown herein are not intended to be limited except as set forth in the following claims. It will therefore be apparent that the specific illustrative embodiments disclosed above can be changed, combined, or modified, and all such changes are considered to be within the scope and spirit of the invention. The invention disclosed herein may be suitably implemented in the absence of any elements not specifically disclosed herein and / or any optional elements disclosed herein.

[0220] While compositions and methods are described as "comprising," "containing," or "including" various components or steps, they may also be described as "substantially composed of various components and steps" or "composed of various components and steps." All the values ​​and ranges disclosed above may be modified to a certain extent.

[0221] Whenever a range of values ​​with a lower and upper limit is disclosed, it specifically discloses any value falling within that range and any included range. In particular, the range of each value disclosed herein (having the form "from about a to about b", or equivalently "from about a to b", or equivalently "from about ab") should be understood as listing every value and range contained within a wider range of values. Similarly, when multiple ranges are disclosed (e.g., 1-100 or 10-90, e.g., 30 to 75), it specifically covers the range from any disclosed lower end to any disclosed upper end (e.g., 10-75).

[0222] Furthermore, the terms in the claims have their ordinary, general meanings unless otherwise explicitly and clearly defined by the patentee. Additionally, the indefinite articles “a” or “an” used in the claims are defined herein as referring to one or more elements they introduce.

Claims

1. A polymer composition comprising: A tailored crystalline resin (TCR) polymer, wherein the TCR polymer comprises a higher molecular weight propylene with a comonomer selected from the group consisting of ethylene and C4-C 10 an in-situ reactor blend of a random copolymer of an alpha-olefin with an olefin and a lower molecular weight substantially isotactic homopolypropylene; the TCR polymer comprises 99.05-99.4 wt% units derived from propylene and 0.6-0.95 wt% units derived from a comonomer selected from the group consisting of ethylene and C4-C 10 one or more alpha-olefins; and the TCR polymer has a melt flow rate at 230°C and 2.16 kg of 5-35 g / 10 min; and a tailored crystalline resin (TCR) polymer, wherein the TCR polymer comprises a higher molecular weight propylene with a comonomer selected from the group consisting of ethylene and C4-C a transparent agent, wherein the transparent agent is a compound represented by the following formula (I): Formula (I) wherein, R a and R b each independently is selected from the group consisting of unsubstituted or substituted aryl, unsubstituted or substituted alkylaryl, and unsubstituted or substituted arylalkyl; R c and R d are each independently selected from hydrogen or a non-hydrogen group; wherein the amount of transparent agent is 2000-6000 ppm based on the weight of the TCR polymer.

2. The polymer composition of claim 1, wherein the TCR polymer comprises 99.1-99.35 wt% units derived from propylene and 0.65-0.9 wt% units derived from comonomer, based on the total weight of the TCR polymer, and / or the TCR polymer has a melt flow rate at 230°C and 2.16 kg of 15-25 g / 10 min.

3. The polymer composition of claim 1, wherein the TCR polymer comprises 99.2-99.4 wt% units derived from propylene and 0.6-0.8 wt% units derived from ethylene, based on the total weight of the TCR polymer, and / or the TCR polymer has a melt flow rate at 230°C and 2.16 kg of 10-30 g / 10 min.

4. The polymer composition of claim 1, wherein in formula (I), R a and R b each independently is selected from the group consisting of C6-C 40 unsubstituted or substituted aryl, C7-C 40 unsubstituted or substituted alkylaryl and C7-C 40 unsubstituted or substituted arylalkyl, each substituent independently is selected from the group consisting of fluorinated hydrocarbon group, alkenyl group, alkyl group, alkynyl group, alkoxy group, ester group, halo group and phenyl group, wherein any two adjacent substituents are optionally combined to form a cyclic group; and / or R c and R d each independently is selected from hydrogen, C1-C 12 unsubstituted or substituted alkyl, C2-C 12 unsubstituted or substituted alkenyl, C1-C 12 unsubstituted or substituted alkoxy, each substituent being independently selected from halogen or hydroxy.

5. The polymer composition of claim 1, wherein the transparent agent is a compound represented by the following formula (II): Formula (II) wherein, R is selected from non-hydrogen groups; R1, R2, R3, R4, R5are each independently selected from hydrogen, fluoroalkyl, alkenyl, alkyl, alkynyl, alkoxy, ester, halo, and phenyl, wherein any two adjacent groups are optionally combined to form a cyclic group; n is 0, 1, or 2.

6. The polymer composition of claim 5, wherein in formula (II), R is selected from alkenyl, alkyl, alkoxy, hydroxyalkyl, and haloalkyl; and / or R1, R2, R3, R4, R5are each independently selected from the group consisting of hydrogen, Ci-C 12 fluorinated hydrocarbon radicals, C2-C 12 alkenyl radicals, Ci-C 12 alkyl radicals, C3-C 12 alkynyl radicals, Ci-C 12 alkoxy radicals, ester radicals, halogen radicals and phenyl radicals; and / or n is 1 or 2.

7. The polymer composition of claim 5, wherein in formula (II), R is selected from allyl and propyl; and / or R1, R2, R3, R4, R5are each independently selected from hydrogen, allyl, and propyl; and / or n is 1.

8. The polymer composition of claim 1, wherein the amount of transparent agent is 3000-5000 ppm based on the weight of the TCR polymer.

9. The polymer composition of claim 1, wherein the TCR polymer is Exxonmobil PP1264, and / or the transparent agent is Millad NX8000.

10. A shaped article comprising the polymer composition of any one of claims 1-9.

11. A method of making the shaped article of claim 10, the method comprising: melt mixing the components of the polymer composition to form a polymer composition; shaping the polymer composition to form a shaped article.

12. The method of claim 11, wherein the shaping is achieved by injection molding, compression molding, extrusion molding, blow molding, or thermoforming.

13. Use of the polymer composition of any one of claims 1-9 to make a shaped article.

14. The shaped article of claim 10, wherein the shaped article comprises a vehicle part, a household appliance part, an electronic device and parts thereof, a medical device and parts thereof, and a packaging article.

15. The method of claim 11, wherein the shaped article comprises a vehicle part, a household appliance part, an electronic device and parts thereof, a medical device and parts thereof, and a packaging article.

16. The use of claim 13, wherein the shaped article comprises a vehicle part, a household appliance part, an electronic device and parts thereof, a medical device and parts thereof, and a packaging article.

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