Highly transparent polymer compositions with improved stiffness and impact resistance

Abstract

The present application relates to a highly 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 comonomers, based on the total weight of the TCR polymer, the weight of the units derived from propylene and the weight of the units derived from comonomers being greater than the total weight of the TCR polymer, and the weight of the units derived from comonomers being greater than the total weight of the TCR polymer; the comonomer is selected from one or more of ethylene and C4-C10 alpha-olefin; and a clearing agent which is a compound represented by the following formula (I): wherein Ra and Rb are each independently selected from the group consisting of an unsubstituted or substituted aryl group, an unsubstituted or substituted alkylaryl group, and an unsubstituted or substituted arylalkyl group; and Rc and Rd are independently selected from hydrogen or a non-hydrogen group. The polymer composition is a polypropylene-based material with high transparency and high mechanical properties, and is widely applied to the fields of vehicles, household appliances and the like. # imgabs0 #

Description

Technical Field

[0001] The present application relates to a polymer composition, in particular, to a highly transparent polymer composition with improved rigidity and impact resistance, a shaped article comprising the polymer, a method for manufacturing the shaped article, and use of the polymer composition for manufacturing a shaped article. Background Art

[0002] With the advancement of lightweighting and design aesthetics in automobiles, demand for transparent materials in automotive exterior parts (such as lampshades and decorative panels) and functional parts (such as sensor covers and interior light guides) is growing. Simultaneously, the packaging and home appliance industries are also experiencing increasing 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 achieving lightweighting requirements in automotive and household products. Consequently, engineers are turning their attention to polypropylene, the most widely used material in these applications, making the development of high-performance transparent polypropylene a key industry priority.

[0003] Currently, the most widely used commercial method for achieving transparent polypropylene is to blend random copolymer polypropylene. The introduction of ethylene monomers disrupts crystallinity, improving transparency, but often results in a significant decrease in mechanical properties (such as rigidity and impact resistance). Another method is to add a clarifier (a special branch of nucleating agents). For example, by adding a clarifier to homopolymer polypropylene or block copolymer polypropylene during the post-processing stage, the clarifier refines the grain size and reduces light scattering, thereby improving transparency. However, the current post-processing process of adding clarifiers to general polypropylene grades has limited improvement in the transparency (especially haze) of polypropylene, and also suffers from the problem of loss of mechanical properties.

[0004] Therefore, the object of the present invention is to provide a new polypropylene-based polymer material that can overcome the shortcomings of the prior art and has both high transparency and high mechanical properties, in particular rigidity and impact resistance, thereby meeting commercial requirements for highly transparent polypropylene materials. Summary of the Invention

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

[0006] Tailored Crystalline Resin (TCR) polymers, wherein the TCR polymer comprises 99-99.4 wt% of units derived from propylene and 0.6-1 wt% of units derived from a comonomer selected from the group consisting of ethylene and C4-C 10 One or more of α-olefins; and

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

[0008]

[0009] in,

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

[0011] R c and R d are each independently selected from hydrogen or non-hydrogen groups.

[0012] In a second aspect, the present disclosure provides a shaped article comprising a polymer composition as described above and below.

[0013] In a third aspect, the present disclosure provides a method of producing a shaped article as described above and below, the method comprising:

[0014] melt mixing the components of the polymer composition to form the polymer composition;

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

[0016] In a fourth aspect, the present disclosure provides use of a polymer composition as described above and below for the manufacture of a shaped article.

[0017] Surprisingly, the polymer composition of the present invention exhibits high transparency, as reflected by both high light transmittance and low haze, while also possessing excellent mechanical properties, particularly rigidity and impact resistance. Furthermore, the polymer composition is suitable for various molding methods, particularly high-speed molding methods such as injection molding, significantly expanding the application areas of transparent polypropylene materials. The polymer composition can be widely used in various applications, including vehicle parts, household appliance parts, electronic devices and components thereof, medical devices and components thereof, and packaging products. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A bar graph showing the light transmittance and haze of the samples in Example 1 is shown.

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

[0020] Figure 3 A bar graph showing the light transmittance and haze of the samples in Example 2 is shown.

[0021] Figure 4A radar chart showing the MFR, density, flexural modulus, flexural strength, tensile strength, and RTNI of the sample in Example 2 is shown.

[0022] Figure 5 A bar graph showing the transmittance and haze of the samples in Example 3 is shown.

[0023] Figure 6 Radar charts of MFR, density, flexural modulus, flexural strength, tensile strength, RTNI, and Charpy impact strength (Charpy) of the samples in Example 3 are shown.

[0024] Details

[0025] Definition and test methods

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

[0027] As used herein, a "polymer" has two or more identical or different monomeric units. A "homopolymer" is a polymer having identical monomeric units. As used herein, the term "polymer" includes, but is not limited to, homopolymers, copolymers, terpolymers, and the like. As used herein, the term "polymer" also includes impact, block, graft, random, and alternating copolymers. Unless otherwise specifically stated, the term "polymer" shall also include all possible geometric configurations. Such configurations may include isotactic, syndiotactic, and random symmetries.

[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., monomeric units). For example, the term "copolymer" includes the copolymerization reaction product of propylene and an α-olefin, such as ethylene or 1-hexene. A "terpolymer" is a polymer having three monomeric units that are different from each other. Thus, the term "copolymer" also includes terpolymers and tetrapolymers, such as copolymer products of a mixture of ethylene, propylene, 1-hexene, and 1-octene.

[0029] As used herein, the terms "polypropylene", "propylene polymer" and "propylene-based polymer" refer to a polymer or copolymer comprising 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 a homopolymer.

[0030] As used herein, "substantially isotactic" is defined as having at least 97% isotactic pentads.

[0031] As used herein, Tailored Crystalline Resin (TCR) is a modified polypropylene comprising a higher molecular weight propylene and a C4-C 10 In situ reactor blends of random copolymers of alpha-olefins, preferably ethylene, with lower molecular weight substantially isotactic homopolypropylene, 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 wt. % of the copolyolefin and are sometimes referred to broadly as homopolypropylene.

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

[0033] As used herein, the term "hydrocarbyl" refers to a group consisting only of hydrogen and carbon atoms. The hydrocarbyl group may be saturated or unsaturated, linear 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. The alkyl group can be linear, branched, cyclic, or substituted cyclic, or a combination thereof.

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

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

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

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

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

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

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

[0042] As used herein, a substituted group (such as a substituted hydrocarbyl) means such a group in which at least one atom is replaced by a different atom or group. For example, a substituted alkyl can be an alkyl in which at least one hydrogen atom is replaced by a hydrocarbyl, a halogen, any other non-hydrogen group, and / or at least one carbon atom and the hydrogen atom to which it is bonded are replaced by a different group. The substituted group may 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., halogen (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 halogenated hydrocarbon group.

[0043] Gel Permeation Chromatography (GPC)

[0044] Unless otherwise indicated, the molecular weight moments and distributions (Mw, Mn, Mz, Mw / Mn, etc.), comonomer content and branching index (g') were determined by high temperature gel permeation chromatography (Polymer Char GPC-IR) equipped with a multi-channel bandpass filter based infrared detector IR5, an 18-angle light scattering detector and a viscometer. vis ), wherein the infrared detector integrated body IR5 based on the multi-channel bandpass filter has a coverage of about 2,700cm -1 - Approximately 3,000cm -1Bandpass region (representing saturated CH stretching vibration). Three Agilent PLgel 10-μm mixed-B LS columns are used to provide polymer separation. Reagent grade 1,2,4-trichlorobenzene (TCB) (from Sigma-Aldrich) containing ~300ppm antioxidant butylated hydroxytoluene (BHT) is used as mobile phase with a nominal flow rate of ~1.0mL / min and a nominal injection volume of ~200μL. The whole system including transfer line, column and detector is accommodated in an oven maintained at ~145°C. A given amount of sample is weighed and sealed in a standard vial, to which ~10μL mobile markers (heptanes) are added. After the bottle is loaded in the automatic sampler, oligomers or polymers are dissolved in an instrument with ~8ml added TCB solvent using continuous shaking at ~160°C. The sample solution concentration is from ~0.2 to ~2.0mg / ml, with lower concentrations being 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. The mass recovery can be calculated from the ratio of the integrated area of the concentration chromatography within the elution volume to the injected mass (which is equal to the predetermined concentration multiplied by the injection loop volume). The conventional molecular weight (IR MW) is determined by combining a universal calibration relationship with a column calibration performed using a series of monodisperse polystyrene (PS) standards ranging from 700 to 10M g / mol. The MW at each elution volume is calculated using the following equation:

[0045]

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

[0047] The comonomer composition is 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 with predetermined nominal values by NMR or FTIP). Specifically, this provides the methyl groups per 1,000 total carbons (CH3 / 1000TC) as a function of molecular weight. The short chain branch (SCB) content per 1000TC (SCB / 1000TC) is then calculated as a function of molecular weight by applying a chain end correction to the CH3 / 1000TC function, assuming that each chain is linear and terminated by a methyl group at each end. The weight % comonomer is then obtained from the following expression, where f is 0.3, 0.4, 0.6, 0.8, etc. for comonomers C3, C4, C6, C8, etc., respectively:

[0048] w2=f*SCB / 1000TC

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

[0050]

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

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

[0053] Bulk SCB / 1000TC=bulk CH3 / 1000TC-bulk CH3 end / 1000TC, and the bulk SCB / 1000TC is converted into bulk 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 output of the LS using the Zimm model for static light scattering (Light Scattering from Polymer Solutions, Huglin, MB ed., Academic Press, 1972):

[0055]

[0056] Here, ΔR(θ) is the excess Rayleigh scattering intensity measured at the 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 coils, and K o is the optical constant 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. In addition, for ethylene polymers, A2 = 0.0015 and dn / dc = 0.104, while for propylene polymers, A2 = 0.0006 and dn / dc = 0.104.

[0059] The 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 by the equation [η] = ηs / c, where c is the concentration and is determined from the IR5 broadband channel output. The viscosity MW at each point is calculated as where α ps is 0.67 and K ps It is 0.000175.

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

[0061]

[0062] where the sum is taken from all chromatographic slices i between the integration limits. Branching index g' vis Defined as Wherein Mv is the viscosity average molecular weight based on the molecular weight determined by LS analysis and K and α are for reference linear polymers, which for the purposes of this invention and the claims thereto are α = 0.705 and K = 0.0002288 for linear propylene polymers. Unless otherwise indicated, concentrations are in g / cm 3 The molecular weight is expressed in units of g / mole, and the intrinsic viscosity (and therefore K in the Mark-Houwink equation) is expressed in units of dL / g.

[0063] In a first aspect, the present disclosure provides a polymer composition comprising a tailored crystalline resin (TCR) polymer and a clarifier.

[0064] The term "custom crystalline resin polymer" has the same meaning as the custom crystalline resin described above, and the two can be used interchangeably.

[0065] In one embodiment, the TCR polymer comprises 99-99.4 wt% of units derived from propylene and 0.6-1 wt% of units derived from a comonomer selected from ethylene and C4-C 10 One or more α-olefins.

[0066] For example, the content of units derived from the comonomer can be in the range of from any of 0.6, 0.61, 0.62, 0.63, 0.64, 0.65, 0.66, 0.67, 0.68, 0.69, 0.7 weight percent to any of 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 weight percent, as long as the lower limit is less than the upper limit.

[0067] For example, the content of units derived from propylene can be in the range of from any of 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 weight % to any of 99.4, 99.39, 99.38, 99.37, 99.36, 99.35, 99.34, 99.33, 99.32, 99.31, 99.3 weight %, as long as the lower limit is less than the upper limit.

[0068] Typically, for propylene-based copolymers, increasing the comonomer content improves the material's transparency, but excessive comonomer content can compromise the material's mechanical properties. The TCR polymers used in this invention, due to their specific comonomer content, can provide materials with both 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, more preferably ethylene.

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

[0071] For example, the melt flow rate of the TCR polymer at 230°C and 2.16 kg can be in the range of from any of 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20 g / 10 min to any of 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 a preferred embodiment, the TCR polymer has a melt flow rate at 230°C and 2.16 kg of 10-30 g / 10 min. In a preferred embodiment, the TCR polymer has a melt flow rate at 230°C and 2.16 kg of 15-25 g / 10 min.

[0073] The TCR polymer used in the present invention has a high melt flow rate, which is of great significance in terminal applications. For example, it can produce larger parts, reduce the time required for processing and molding, and reduce processing costs, thereby significantly expanding 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 to 100,000 g / mol, preferably 10,000 to 80,000 g / mol, preferably 20,000 to 60,000 g / mol, preferably 30,000 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) a polydispersity index (Mw / Mn) of 2 to 8, preferably 2.5 to 7.5, preferably 3 to 7, preferably 4 to 6;

[0079] (v) a branching index g' of ≥0.95, preferably ≥0.97, preferably ≥0.99, preferably about 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, preferably 1.1 dL / g to 1.3 dL / g;

[0081] (vii)0.880g / cm 3 -0.910g / cm 3 , preferably 0.890 g / cm 3 to 0.910g / cm 3 , preferably 0.895g / cm 3 -0.905g / cm 3 , preferably 0.900g / cm 3 -0.905g / cm 3 density.

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

[0083] A suitable TCR polymer is commercially available under the trade name Exxonmobil PP1264. It contains 0.7 wt% of units derived from ethylene and has a melt flow rate at 230°C and 2.16 kg of 20 g / 10 min and a flow rate of 0.900 g / cm 3 density.

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

[0085]

[0086] in,

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

[0088] R c and R d are each independently selected from hydrogen or non-hydrogen groups.

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

[0090] R a and Rb Each 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 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, the substituents are each independently selected from fluoroalkyl, alkenyl, alkyl, alkynyl, alkoxy, ester, halide 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 independently selected from hydrogen, C1-C 12 Unsubstituted or substituted alkyl, C2-C 12 Unsubstituted or substituted alkenyl, C1-C 12 Unsubstituted or substituted alkoxy; preferably, R c and R d Each is independently selected from hydrogen, C1-C6 unsubstituted or substituted alkyl, C2-C6 unsubstituted or substituted alkenyl, C1-C6 unsubstituted or substituted alkoxy; preferably, the substituents are each independently selected from halogen or hydroxy.

[0092] In one embodiment, the clearing agent is a compound represented by the following 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, a fluoroalkyl group, an alkenyl group, an alkyl group, an alkynyl group, an alkoxy group, an ester group, a halide group, and a phenyl group, wherein any two adjacent groups are optionally 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-C12 Alkenyl (e.g., C2-C6 alkenyl, C3-C6 alkenyl), C1-C 12 Alkyl (e.g. C2-C6 alkyl, C3-C6 alkyl), C1-C 12 Alkoxy (e.g., C2-C6 alkoxy, C3-C6 alkoxy), C1-C 12 Hydroxyalkyl (e.g. C2-C6 hydroxyalkyl, C3-C6 hydroxyalkyl) and C1-C 12 Haloalkyl (e.g., C2-C6 haloalkyl, C3-C6 haloalkyl); 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 fluoroalkyl, C3-C6 fluoroalkyl), C2-C 12 Alkenyl (e.g., C2-C6 alkenyl, C3-C6 alkenyl), C1-C 12 Alkyl (e.g. C2-C6 alkyl, C3-C6 alkyl), C2-C 12 Alkynyl (e.g., C2-C6 alkynyl, C3-C6 alkynyl), C1-C 12 Alkoxy (e.g., C2-C6 alkoxy, C3-C6 alkoxy), ester, halo, and phenyl; 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, R5 are each independently selected from hydrogen, allyl and propyl; and / or

[0105] n is 1.

[0106] The compound of formula (I) can be formed by reacting 1 mole of a polyol compound (such as sorbitol, 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 the compound of formula (II), reacting a polyol compound (such as sorbitol, xylitol) with an olefin molecule to form a first compound, which is then reacted 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 clarifiers are commercially available from Milliken under the trade names Millad NX8000, Millad 3988, Millad 3940, or from Chenghe Technology under the trade names NA98G, NA98L.

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

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

[0110] For example, the amount of the clarifier can be within a range from 2000, 2500, 3000, 3500, 4000, or 4500 ppm to 6000, 5500, 5000, or 4500 ppm, as long as the lower limit is less than the upper limit. If the clarifier content is too low, the desired transmittance and haze cannot be achieved. If the clarifier content is too high, the transmittance and haze will not be further improved, but the material cost will increase.

[0111] In a preferred embodiment, the amount of the clarifier 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 clarifier is within this relatively high range, not only can the desired light transmittance and haze be achieved, but the stiffness and impact resistance can also be significantly improved, thereby achieving a polypropylene material with both 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 homopolypropylene 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, homopolypropylene, and an elastomer, wherein the weight ratio of the TCR polymer to the total amount of the homopolypropylene and the elastomer is 2:8 to 8:2, e.g., 3:7 to 7:3, 4:6 to 6:4.

[0113] In one embodiment, the polymer composition of the present invention may also include an effective amount of a 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 organic phosphates, acidic metal phosphates, and mixtures thereof.

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

[0115] In one embodiment, the polymer composition of the present invention can also be combined with other additives or compounds to provide compositions with specific, desired properties. Many such additives and compounds are known in the art. Those skilled in the art are familiar with how to use appropriate additives or compounds. Examples of such substances include ultraviolet 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] In a second aspect, the present disclosure provides a shaped article comprising the polymer composition of the present invention.

[0117] In one embodiment, shaped articles are formed from the polymer compositions of the present invention.

[0118] In a third aspect, the present disclosure provides a method of making a shaped article of the present invention, the method comprising:

[0119] melt mixing the components of the polymer composition to form the polymer composition;

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

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

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

[0123] Surprisingly, the polymer composition of the present invention can be processed particularly well by high-speed molding methods such as injection molding, and can be formed into thick-walled products (e.g., with a thickness of ≥2 mm, ≥2.5 mm, or ≥3 mm). The resulting thick-walled products exhibit both excellent transparency and mechanical properties, significantly expanding the application areas of transparent polypropylene materials. Furthermore, the high melt flow rate of the polymer composition of the present invention enables good processability, improved processing efficiency, and reduced costs regardless of the molding method used.

[0124] In a fourth aspect, the present disclosure provides use of the polymer composition of the present invention for making a shaped article.

[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 products. Vehicle parts include, for example, automotive interior components such as instrument panel covers, ambient light guide strips, and button / knob covers; automotive exterior functional components such as side turn signal covers, charging port covers, and rearview mirror housings; subway / bus armrest covers; high-speed train window linings; aircraft window linings; and ship instrument panels. Household appliance parts include, for example, transparent panels / covers such as microwave oven doors and air fryer viewing windows; button / touch screen covers such as washing machine control panels and induction cooker touch areas; storage containers such as refrigerator drawers and crisper boxes; lampshades / 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 indicated, all numerical values used in this specification and the associated claims expressing the amounts of ingredients, properties such as molecular weight, reaction conditions, etc. should be understood as being modified in all instances by the term "about". Therefore, unless indicated to the contrary, the numerical parameters listed in the following specification and the appended claims are approximate values that may vary depending on the desired properties sought to be obtained by embodiments of the present invention. At the very 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 at least be construed in light of the number of reported significant digits and by applying ordinary rounding techniques.

[0127] This paper proposes one or more illustrative embodiments comprising one or more inventive elements. For the sake of clarity, all features of physical implementation are not described or shown in this application. It should be understood that in the development of physical embodiments comprising one or more elements of the present invention, in order to achieve the developer's goal, many specific decisions must be made to achieve these, such as complying with system-related, business-related, government-related and other constraints, which vary from time to time with the implementation. Although the developer's efforts may be time-consuming, such efforts are routine tasks for those of ordinary skill in the art who benefit from this disclosure.

[0128] Although compositions and methods are described herein in terms of "comprising" various components or steps, the compositions and methods may also "consist essentially of" or "consist of" the various components and steps. In the context of compositions, consisting essentially of allows for 25 ppm or less of each impurity.

[0129] Additional embodiments

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

[0131] 1. A polymer composition comprising:

[0132] Tailored Crystalline Resin (TCR) polymers, wherein the TCR polymer comprises 99-99.4 wt% of units derived from propylene and 0.6-1 wt% of units derived from a comonomer selected from the group consisting of ethylene and C4-C 10 One or more of α-olefins; and

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

[0134]

[0135] in,

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

[0137] R c and R d are each independently selected from hydrogen or non-hydrogen groups.

[0138] 2. The polymer composition of embodiment 1, wherein the TCR polymer comprises 99.05-99.4 wt.% of units derived from propylene and 0.6-0.95 wt.% of units derived from a 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 5-35 g / 10 min.

[0139] 3. A polymer composition according to embodiment 1, wherein the TCR polymer comprises 99.2-99.4 wt% of units derived from propylene and 0.6-0.8 wt% of 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.

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

[0141] R a and R b Each 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, the substituents being each independently selected from fluoroalkyl, alkenyl, alkyl, alkynyl, alkoxy, ester, halide and phenyl, wherein any two adjacent substituents are optionally combined to form a cyclic group; and / or

[0142] R c and R d Each independently selected from hydrogen, C1-C 12 Unsubstituted or substituted alkyl, C2-C 12 Unsubstituted or substituted alkenyl, C1-C 12 The unsubstituted or substituted alkoxy group, the substituents are each independently selected from a halo group or a hydroxy group.

[0143] 5. The polymer composition according to embodiment 1, wherein the clarifier is a compound represented by the following 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, a fluoroalkyl group, an alkenyl group, an alkyl group, an alkynyl group, an alkoxy group, an ester group, a halide group, and a phenyl group, wherein any two adjacent groups are optionally 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, C2-C 12 Alkenyl, C1-C 12 Alkyl, C3-C 12 Alkynyl, C1-C 12 Alkoxy, ester, halide and phenyl; 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, R5 are each independently selected from hydrogen, allyl and propyl; and / or

[0156] n is 1.

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

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

[0159] 10. The polymer composition of embodiment 1, wherein the TCR polymer is Exxonmobil PP1264, and / or the clarifier is Millad NX8000.

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

[0161] 12. A method of producing a shaped article according to embodiment 11, the method comprising:

[0162] melt mixing the components of the polymer composition to form the polymer composition;

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

[0164] 13. The method according to embodiment 12, wherein the forming 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 to 10 for producing a shaped article.

[0166] 15. The shaped article according to embodiment 11, the method according to embodiment 12, or the use according to embodiment 14, 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. DETAILED DESCRIPTION

[0167] In order to promote a better understanding of the embodiments of the present invention, the following examples of preferred or representative embodiments are given. The following examples should in no way be construed as limiting or defining the scope of the present invention.

[0168] Example

[0169] Test Method

[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 ASTM 1003. The two standards used the same instruments and test methods, with the only difference being the different baselines.

[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 ASTM 1003. The two standards used the same instruments and test methods, with the only difference being the different baselines.

[0174] 3. Density

[0175] Measured according to ISO 1183.

[0176] 4. Melt flow rate (MFR)

[0177] Measured according to ISO 1133.

[0178] 5. Flexural modulus

[0179] Measured according to ISO 178.

[0180] 6. Bending strength

[0181] Measured according to ISO 178.

[0182] 7. Tensile strength

[0183] Measured according to ISO 527.

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

[0185] Measured according to ISO 180.

[0186] 9. Charpy impact strength

[0187] Measured according to ISO 179.

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

[0189] Table 1 Description of the raw materials used in the examples

[0190]

[0191]

[0192] Example 1

[0193] This example is intended to evaluate the effect of the type of clarifier on the properties of polypropylene.

[0194] PP1264 was melt-blended with 2000 ppm (based on the weight of PP1264) of the clarifiers NX8000, NA98G, and NA98L, respectively, in a Leistritz TSE 40mm twin-screw extruder at 200°C, extruded, and pelletized underwater to produce granular compositions. The granular compositions were then melt-blended and injection-molded into standard thickness plates of 2.0 mm, 2.5 mm, and 3.0 mm in a Haitian injection molding machine at 200°C, all 150 mm long and 100 mm wide. The transmittance and haze of each sample were tested, and the results are shown in Tables 2 and 3. Figure 1 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, and 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 shown.

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

[0197]

[0198]

[0199] From Table 2 and Figure 1 As can be seen from the results in Figure 2, the transmittance of each sample is relatively close, with no significant difference even for the thicker samples. However, in terms of haze, the use of NX8000 resulted in significantly lower haze compared to the use of NA98G and NA98L, indicating that NX8000 has a better transparency improvement effect in reducing haze.

[0200] In addition, from Figure 2 As can be seen from the results, the MFR, density and mechanical properties of the three samples are relatively close.

[0201] Example 2

[0202] This example is intended to evaluate the effect of the clarifier content on the properties of polypropylene.

[0203] PP1264 was melt-blended with 2000 ppm and 4500 ppm (based on the weight of PP1264) of the clarifier NX8000 in a Leistritz TSE 40mm twin-screw extruder at 200°C, extruded, and pelletized underwater to produce granular compositions. The granular compositions were then melt-blended and injection-molded in a Haitian injection molding machine at 200°C into standard thickness plates of 2.0 mm, 2.5 mm, and 3.0 mm, all 150 mm long and 100 mm wide. The transmittance and haze of each sample were tested, and the results are shown in Tables 3 and 4. Figure 3 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, and 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 shown.

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

[0206]

[0207]

[0208] From Table 3 and Figure 3 The results in Figure 2 show that increasing the clarifier content to 4500ppm results in a greater improvement in haze compared to the addition of 2000ppm NX8000, especially for thicker boards. 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 field of the material.

[0209] Example 3

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

[0211] The control composition is a commercially available advanced modified polypropylene blend formulation for automotive decorative strips, which is a blend of 50% (ordinary homopolymer polypropylene + elastomer) and 50% commercially available transparent homopolymer polypropylene, and further contains a clarifier.

[0212] The composition of the present invention replaces the highly transparent homopolypropylene in the control composition with PP1264, and further adds 4500 ppm (based on the weight of PP1264) of the clarifiers NX8000, NA98G and NA98L, respectively.

[0213] Each composition was injection molded into standard thickness plates with thicknesses 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 Tables 4 and Figure 5 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, and then the MFR, density, flexural modulus, flexural strength, tensile strength, Charpy impact strength and RTNI of each sample were tested according to the standard test method. The results are as follows: Figure 6 shown.

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

[0216]

[0217]

[0218] From Table 4 and Figure 5 As can be seen from the results in Figure 1, PP1264+NX8000, PP1264+NA98G, and PP1264+NA98L all exhibit better appearance properties than the commercially available blends, as evidenced by higher light transmittance and lower haze. Figure 6 The results show that the mechanical properties of PP1264+NX8000, PP1264+NA98G and PP1264+NA98L are comparable to those of the commercially available compounding formula.

[0219] Therefore, the present invention is well adapted to obtain the results and advantages mentioned and inherent therein. The specific embodiments and configurations disclosed above are illustrative only, as it will be apparent to those skilled in the art having the benefit of the teachings herein that different but equivalent means may be employed to modify and implement the present invention. Furthermore, no limitation is intended to the details of construction or design shown herein, except as described in the claims below. It is therefore apparent that the specific illustrative embodiments disclosed above may be changed, combined, or modified, and all such variations are considered within the scope and spirit of the present invention. The invention disclosed herein illustratively may be suitably implemented in the absence of any element not specifically disclosed herein and / or any optional element disclosed herein.

[0220] Although compositions and methods are described in terms of "comprising," "containing," or "including" various components or steps, the compositions and methods may also "consist essentially of" or "consist of" the various components and steps. All numerical values and ranges disclosed above may vary to some extent.

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

[0222] Also, the terms in the claims have their plain, ordinary meaning unless otherwise explicitly and clearly defined by the patentee. Furthermore, the indefinite articles "a" or "an," as used in the claims, are defined herein to mean one or more than one of the element it introduces.

Claims

1. A polymer composition comprising: Tailored Crystalline Resin (TCR) polymers, wherein the TCR polymer comprises 99-99.4 wt% of units derived from propylene and 0.6-1 wt% of units derived from a comonomer selected from the group consisting of ethylene and C4-C 10 One or more of α-olefins; and A clearing agent, wherein the clearing agent is a compound represented by the following formula (I): in, R a and R b are each independently selected from 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 non-hydrogen groups.

2. The polymer composition of claim 1 , wherein the TCR polymer comprises 99.05-99.4 wt.% of units derived from propylene and 0.6-0.95 wt.% of units derived from a 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 5-35 g / 10 min.

3. The polymer composition of claim 1 , wherein the TCR polymer comprises 99.2-99.4 wt.% of units derived from propylene and 0.6-0.8 wt.% of 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 according to claim 1, wherein in formula (I), R a and R b Each 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, the substituents being each independently selected from fluoroalkyl, alkenyl, alkyl, alkynyl, alkoxy, ester, halide and phenyl, wherein any two adjacent substituents are optionally combined to form a cyclic group; and / or R c and R d Each independently selected from hydrogen, C1-C 12 Unsubstituted or substituted alkyl, C2-C 12 Unsubstituted or substituted alkenyl, C1-C 12 The unsubstituted or substituted alkoxy group, the substituents are each independently selected from a halo group or a hydroxy group.

5. The polymer composition according to claim 1, wherein the clarifier is a compound represented by the following formula (II): in, R is selected from non-hydrogen groups; R1, R2, R3, R4, and R5 are each independently selected from hydrogen, a fluoroalkyl group, an alkenyl group, an alkyl group, an alkynyl group, an alkoxy group, an ester group, a halide group, and a phenyl group, wherein any two adjacent groups are optionally combined to form a cyclic group; n is 0, 1 or 2.

6. The polymer composition according to claim 5, wherein in formula (II), R is selected from alkenyl, alkyl, alkoxy, hydroxyalkyl and haloalkyl; and / or R1, R2, R3, R4, and R5 are each independently selected from hydrogen, C1-C 12 Fluorinated hydrocarbon, C2-C 12 Alkenyl, C1-C 12 Alkyl, C3-C 12 Alkynyl, C1-C 12 Alkoxy, ester, halide and phenyl; and / or n is 1 or 2.

7. The polymer composition according to claim 5, wherein in formula (II), R is selected from allyl and propyl; and / or R1, R2, R3, R4, R5 are each independently selected from hydrogen, allyl and propyl; and / or n is 1.

8. The polymer composition of claim 1, wherein the amount of the clarifier is 2000-6000 ppm based on the weight of the TCR polymer.

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

10. The polymer composition of claim 1, wherein the TCR polymer is Exxonmobil PP1264, and / or the clarifier is Millad NX8000.

11. A shaped article comprising the polymer composition according to any one of claims 1 to 10.

12. A method for producing a shaped article according to claim 11, the method comprising: melt mixing the components of the polymer composition to form the polymer composition; The polymer composition is shaped to form a shaped article.

13. The method according to claim 12, wherein the forming is achieved by injection molding, compression molding, extrusion molding, blow molding or thermoforming.

14. Use of the polymer composition according to any one of claims 1 to 10 for producing shaped articles.

15. The molded article according to claim 11, the method according to claim 12, or the use according to claim 14, wherein the molded 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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