Polypropylene composition and preparation method thereof

Abstract

The invention discloses a polypropylene composition and a preparation method thereof, and belongs to the technical field of high polymer materials, in the polypropylene composition, a polyolefin elastomer is used as a coating material of a halogen-free flame retardant, and the compatibility and dispersity of the halogen-free flame retardant in a product are improved by matching with low-melting-point polycaprolactone and a specifically compounded lubricant component; the product not only can meet the basic toughness requirement, but also does not become white when meeting water in a short time or being used in a humid and hot environment for a long time, and the appearance stability is high.

Description

Technical Field

[0001] The present invention relates to the technical field of polymer materials, and particularly relates to a polypropylene composition and a preparation method thereof. Background Art

[0002] The halogen-free of flame-retardant plastics is the main trend at the current stage. Compared with traditional halogen-based flame-retardant plastics, it has the advantages of lower smoke density and lower toxicity, which is more conducive to the development of environmental protection industrialization. At present, halogen-free flame-retardant plastics, especially halogen-free flame-retardant polypropylene materials, are currently widely used in fields such as heaters and hot air ducts. However, these products generally have the phenomenon of surface whitening. Based on different principles, it is mainly divided into two situations:

[0003] (1) Under normal environmental conditions, the halogen-free flame retardant itself contains many polar groups such as hydroxyl groups and amino groups. Therefore, its compatibility with the polypropylene resin matrix is poor. If no compatibilization modification is carried out during the product preparation process, the situation of uneven dispersion may occur. Some of the halogen-free flame retardants distributed on the product surface will directly react when directly contacting water or polar substances, and thus the whitening phenomenon will occur.

[0004] (2) The halogen-free flame retardant has easy migration properties. Even in the initial stage of use, some modified products prepared by introducing compatibilizers have the halogen-free flame retardant encapsulated inside the resin and will not turn white when exposed to water. However, under the action of some polar substances in the humid and hot conditions, the halogen-free flame retardant will gradually be extracted and transferred to the product surface to accumulate. Therefore, after being used for a period of time, the whitening phenomenon will still occur.

[0005] In addition, in order to improve the mechanical properties of the product itself, some rigid or tough additives such as elastomers are often introduced into the flame-retardant polypropylene products. These additives will promote the decomposition of the halogen-free flame retardant during the product preparation process, further increasing the probability of the product turning white when exposed to water. Summary of the Invention

[0006] Based on the defects existing in the prior art, the purpose of the present invention is to provide a polypropylene composition. In this polypropylene composition, a polyolefin elastomer is used as the coating material for the halogen-free flame retardant, and is combined with low-melting-point polycaprolactone and a specifically compounded lubricant component to improve the compatibility and dispersibility of the halogen-free flame retardant in the product, so that the product can not only meet the basic toughness requirements, but also will not show obvious whitening phenomena whether it is exposed to water in the short term or used in a long-term humid and hot environment, and has high appearance stability.

[0007] In order to achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0008] A polypropylene composition, comprising the following components in parts by weight:

[0009] 65 - 85 parts of polypropylene resin, 20 - 30 parts of halogen - free flame retardant, 3 - 8 parts of polyolefin elastomer, 1 - 5 parts of polycaprolactone, 0.05 - 0.4 parts of hyperbranched polyester, 0.02 - 0.2 parts of stearate, and 0.02 - 0.2 parts of long - chain saturated fatty acid.

[0010] Existing halogen - free flame - retardant polypropylene materials are prone to surface whitening after short - term or long - term use. This is because the halogen - free flame retardant reacts and decomposes when exposed to external moisture, resulting in whitening. Moreover, the halogen - free flame retardant has high decomposition activity and easy migration properties. It is not only easily affected by the toughening agent during product processing, which accelerates its decomposition, but also gradually migrates to the product surface due to the natural extraction of polar substances even when inside the product, and finally turns white when encountering water. Therefore, in the technical solution of the present invention, in order to prevent the halogen - free flame retardant from directly contacting external moisture, a specific polyolefin elastomer is used as the coating material for the halogen - free flame retardant. This material itself has an amorphous structure and good compatibility with polypropylene resin. When introduced into the polypropylene resin matrix, it can effectively coat the surface of the halogen - free flame retardant, playing a role similar to an isolation capsule, achieving high dispersibility, and at the same time ensuring that the product has sufficient toughness. On the other hand, in order to inhibit the migration tendency of the halogen - free flame retardant, low - melting - point polycaprolactone also needs to be introduced into the product. This component itself has dual molecular chain segments of polarity and non - polarity. In a humid and hot environment, this component will accelerate the crystallization of polypropylene and isolate the halogen - free flame retardant component in the amorphous region. During product processing, this component can also act as the third phase between the flame retardant and the matrix resin, supplementing the highly polar halogen - free flame retardant to the interface or inside the third phase, reducing subsequent migration and precipitation. Finally, based on the multiple component characteristics of the elastomer, polycaprolactone, and halogen - free flame retardant, a lubricant component formed by the compounding of hyperbranched polyester, stearate, and long - chain saturated fatty acid also needs to be introduced into the product of the present invention. The three can cooperate to ensure the uniform dispersion of each component in the matrix resin. Polycaprolactone can be fully filled between the matrix resin and the elastomer - wrapped halogen - free flame retardant. When the appearance stability of the product is significantly improved, it will not affect the required flame - retardant performance and toughness.

[0011] Preferably, among the components of the polypropylene composition, the weight parts of the polypropylene resin are one of 65 parts, 68 parts, 70 parts, 73 parts, 75 parts, 77 parts, 80 parts, 85 parts or the range value of any two of them, more preferably 68 to 77 parts; the weight parts of the halogen-free flame retardant are one of 20 parts, 22 parts, 25 parts, 28 parts, 30 parts or the range value of any two of them, more preferably 22 to 28 parts; the weight parts of the ethylene elastomer are one of 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, 8 parts or the range value of any two of them, more preferably 4 to 6 parts; the weight parts of the polycaprolactone are one of 1 part, 2 parts, 3 parts, 4 parts, 5 parts or the range value of any two of them, more preferably 2 to 3 parts; the weight parts of the hyperbranched polyester are one of 0.05 parts, 0.1 parts, 0.15 parts, 0.2 parts, 0.25 parts, 0.3 parts, 0.35 parts, 0.4 parts or the range value of any two of them; the weight parts of the stearate are one of 0.02 parts, 0.05 parts, 0.08 parts, 0.1 parts, 0.12 parts, 0.15 parts, 0.18 parts, 0.2 parts or the range value of any two of them; the weight parts of the long-chain saturated fatty acid are one of 0.02 parts, 0.05 parts, 0.08 parts, 0.1 parts, 0.12 parts, 0.15 parts, 0.18 parts, 0.2 parts or the range value of any two of them.

[0012] Preferably, in the polypropylene composition, the polypropylene resin includes at least one of a homopolypropylene resin and a copolymerized polypropylene resin.

[0013] Preferably, in the polypropylene composition, the mass percentage content of the polypropylene resin ≥ 60%.

[0014] Preferably, the melt flow rate of the polypropylene resin at 230 °C and a load of 2.16 kg according to ISO-1133-2011 is 0.2 to 35 g / 10 min. More preferably, the melt flow rate of the polypropylene resin at 230 °C and a load of 2.16 kg is 8 to 12 g / 10 min.

[0015] Preferably, the polyolefin elastomer includes at least one of an ethylene-propylene copolymer elastomer, an ethylene-butene copolymer elastomer, and an ethylene-octene copolymer elastomer.

[0016] More preferably, the melt flow rate of the polyolefin elastomer at 190 °C and a load of 2.16 kg according to ISO1133-1-2011 is 0.5 to 10 g / 10 min. More preferably, the melt flow rate of the polyolefin elastomer at 190 °C and a load of 2.16 kg is 0.8 to 6 g / 10 min.

[0017] Due to the special nature of its molecular chain, polyolefin elastomers of the vinyl type can achieve high compatibility with polypropylene resin. At the same time, they can fully combine and coat the surface of the halogen-free flame retardant to achieve isolation. Compared with other conventional types of elastomers or toughening agents for polypropylene resin, they can inhibit the whitening of the halogen-free flame retardant.

[0018] More preferably, the polyolefin elastomer is an ethylene-propylene copolymer elastomer.

[0019] In addition to the differences in the coating and isolation properties of different ethylene elastomers for the halogen-free flame retardant, there are also differences in the dispersion stability in the matrix resin after coating. When an ethylene-propylene copolymer elastomer is preferably used, the product can achieve more lasting appearance stability.

[0020] Preferably, the number-average molecular weight of the polycaprolactone is 8000 - 90000 g / mol.

[0021] The molecular weight of the polycaprolactone is determined by gel permeation chromatography (GPC) testing.

[0022] More preferably, the weight-average molecular weight of the polycaprolactone is 20000 - 70000 g / mol.

[0023] The molecular weight of polycaprolactone is related to the fluidity and compatibility of this component in the product. Especially during the product processing, when the molecular weight of polycaprolactone is preferably within the above range, the product can, together with the lubricant component, achieve a better third-phase bridging effect between components, making the isolation and dispersion of the halogen-free flame retardant in the product better, and the performance of resistance to damp heat and whitening better.

[0024] Preferably, the melting point of the polycaprolactone is 55 - 65 °C.

[0025] The melting point of the polycaprolactone is determined by differential scanning calorimetry testing.

[0026] Preferably, the halogen-free flame retardant includes at least one of ammonium polyphosphate, piperazine pyrophosphate, melamine polyphosphate, melamine pyrophosphate, triazine charring agent, and melamine cyanurate.

[0027] Preferably, the hyperbranched polyester is an aromatic hyperbranched polyester. More preferably, the density of the hyperbranched polyester is 1 - 1.1 g / cm 3 。

[0028] Preferably, the stearic acid ester includes at least one of distearyl pentaerythritol and pentaerythritol distearate.

[0029] Preferably, the long-chain saturated fatty acid has 17 - 24 carbon atoms.

[0030] More preferably, the long-chain saturated carboxylic acid includes at least one of behenic acid and stearic acid.

[0031] More preferably, in the polypropylene composition, the weight parts of the hyperbranched polyester are 0.1-0.2 parts, the weight parts of the stearic acid ester are 0.1-0.15 parts, and the weight parts of the long-chain saturated fatty acid are 0.1-0.15 parts.

[0032] When the ratio of the three is preferably within the above range, the product can achieve more durable moisture and heat resistance and whitening resistance performance.

[0033] More preferably, the polypropylene composition includes 0.1-1 part of processing aids.

[0034] It should be noted that among the components of the product of the present invention, the processing aids may include antioxidants, antistatic agents, anti-dripping agents, etc. Those skilled in the art can add them according to actual needs as long as they do not affect the expected technical effects of the product of the present invention.

[0035] More preferably, the processing aids include 0.01-0.5 part of antioxidant and 0.01-0.5 part of anti-dripping agent.

[0036] More preferably, the antioxidant includes at least one of hindered phenol antioxidants, phosphite antioxidants, and hindered amine antioxidants.

[0037] More preferably, the hindered phenol antioxidant includes at least one of 2,6-di-tert-butyl-4-methylphenol, pentaerythritol tetra[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate], and n-octadecyl β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate, and the phosphite antioxidant includes at least one of tris(2,4-di-tert-butylphenyl)phosphite and bisphenol A phosphite.

[0038] More preferably, the antioxidant is a mixture of a hindered phenol antioxidant and a phosphite antioxidant, and the mass ratio of the two is (1.8-2.2):1.

[0039] More preferably, the anti-dripping agent includes polytetrafluoroethylene.

[0040] Another object of the present invention also lies in providing a preparation method of the polypropylene composition, including the following steps:

[0041] Adding each component into a screw extruder for melt extrusion and pelletizing to obtain the polypropylene composition.

[0042] Preferably, the temperature zones of the screw extruder are set as follows: Zone 1: 110 - 130 °C, Zone 2: 210 - 230 °C, Zone 3: 210 - 230 °C, Zone 4: 210 - 230 °C, Zone 5: 210 - 230 °C, Zone 6: 210 - 230 °C, Zone 7: 210 - 230 °C, Zone 8: 210 - 230 °C, Zone 9: 210 - 230 °C, Zone 10: 210 - 230 °C. The screw rotation speed is 400 - 500 rpm, and the screw length-diameter ratio is (38 - 42):1.

[0043] Another object of the present invention is to provide the application of the polypropylene composition in the preparation of high-temperature resistant equipment parts.

[0044] Preferably, the high-temperature resistant equipment includes a warm air blower and a new energy battery, and the high-temperature resistant equipment parts include a warm air blower housing, a new energy battery cover plate, a hot air delivery pipe, and an electronic device protection case.

[0045] Due to the introduction of the halogen-free flame retardant and polyolefin elastomer in the polypropylene composition of the present invention, good flame retardant performance and toughness performance can be achieved. At the same time, based on the special composition design, whether the product encounters water in the short term or is used in a long-term humid and hot environment, good appearance stability can be achieved, and the improvement degree of the whitening phenomenon is far better than that of existing products, with high comprehensive performance-price ratio.

[0046] The beneficial effect of the present invention is that the present invention provides a polypropylene composition. In this product, a polyolefin elastomer is used as the coating material for the halogen-free flame retardant, and is combined with low-melting-point polycaprolactone and a specific compounded lubricant component to improve the compatibility and dispersibility of the halogen-free flame retardant in the product, so that the product can not only meet the basic toughness requirements, but also will not show obvious whitening whether it encounters water in the short term or is used in a long-term humid and hot environment, with high appearance stability. Detailed Embodiments

[0047] To better illustrate the purpose, technical solution and advantages of the present invention, the present invention will be further described below in conjunction with specific examples and comparative examples. The purpose is to understand the content of the present invention in detail, rather than to limit the present invention. All other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention. The experimental reagents and instruments involved in the implementation of the present invention are all common ordinary reagents and instruments unless otherwise specified.

[0048] Examples 1 - 14

[0049] An embodiment of the flame-retardant polypropylene and its preparation method according to the present invention, and the composition components of the flame-retardant polypropylene are shown in Table 1.

[0050] The preparation method of the flame-retardant polypropylene includes the following steps:

[0051] Mix each component evenly, and then melt-extrude and pelletize in a twin-screw extruder to obtain the flame-retardant polypropylene.

[0052] When the components are melt-extruded, the temperature zones of the twin-screw extruder are set as follows: Zone 1: 110 - 130°C, Zone 2: 210 - 230°C, Zone 3: 210 - 230°C, Zone 4: 210 - 230°C, Zone 5: 210 - 230°C, Zone 6: 210 - 230°C, Zone 7: 210 - 230°C, Zone 8: 210 - 230°C, Zone 9: 210 - 230°C, Zone 10: 210 - 230°C. The screw rotation speed is 450 rpm, and the screw length-diameter ratio is 40:1.

[0053] Comparative Examples 1 - 10

[0054] The differences between each comparative example and the example only lie in the types and ratios of the components, as shown in Table 2.

[0055] Among the components of each example and comparative example,

[0056] Polypropylene 1 is K1708 produced by Sinopec Chemical Industry, a homopolypropylene, with a melt flow rate of 9.98 g / 10 min at 230°C and a load of 2.16 kg;

[0057] Polypropylene 2 is PP SP179 produced by Sinopec Chemical Industry, a copolymer polypropylene, with a melt flow rate of 10 g / 10 min at 230°C and a load of 2.16 kg;

[0058] Halogen-free flame retardant 1 is FP-2200 produced by Adeka, a piperazine pyrophosphate flame retardant;

[0059] Halogen-free flame retardant 2 is JLS-PNA260 produced by Jelsi, a polyphosphate piperazine flame retardant;

[0060] Ethylene elastomer 1 is Vistamaxx 3020FL produced by ExxonMobil Chemical, an ethylene-propylene copolymer elastomer, with a melt flow rate of 1.2 g / 10 min at 190°C and a load of 2.16 kg;

[0061] Ethylene elastomer 2 is POE ENGAGE 8842 produced by Dow Chemical, an ethylene-octene copolymer elastomer, with a melt flow rate of 1 g / 10 min at 190°C and a load of 2.16 kg;

[0062] Ethylene elastomer 3 is MPOE VL8801 produced by South Korea's Daelim Industrial Co., Ltd., an ethylene-butene copolymer elastomer, with a melt flow rate of 1 g / 10 min at 190°C and a load of 2.16 kg;

[0063] Ethylene elastomer 4 is MPOE VL8805 produced by Daelim of South Korea, an ethylene-butene copolymer elastomer, with a melt flow rate of 5 g / 10 min at 190° C. and a load of 2.16 kg;

[0064] SEBS elastomer is SEBS S6552 produced by Zhejiang Zhongli Synthetic New Materials Technology Co., Ltd., a hydrogenated styrene-butadiene block copolymer;

[0065] The linear low-density polyethylene was LLDPE 7042 (Sichuan) produced by China National Petroleum Corporation, with a melt flow rate of 2 g / 10 min at 190 °C and a load of 2.16 kg;

[0066] Polycaprolactone 1 is PA061823 produced by Guangdong Wengjiang Chemical Reagent Co., Ltd., with a number average molecular weight of 30000 g / mol;

[0067] Polycaprolactone 2 is PA061822 produced by Guangdong Wengjiang Chemical Reagent Co., Ltd., with a number average molecular weight of 60000 g / mol;

[0068] Polycaprolactone 3 is PA061824 produced by Guangdong Wengjiang Chemical Reagent Co., Ltd., with a number average molecular weight of 10000 g / mol;

[0069] Polycaprolactone 4 is PA061821 produced by Guangdong Wengjiang Chemical Reagent Co., Ltd., with a number average molecular weight of 80000 g / mol;

[0070] Polylactic acid is produced by Hisun Biomaterials Co., Ltd. as PLA REVODE213;

[0071] The poly(succinic acid succinate) was PBS E801 produced by Meirui New Materials;

[0072] Hyperbranched polyester is produced by Wuhan Hyperbranched Resin Technology Co., Ltd. Hyper C100, aromatic hyperbranched polyester

[0073] Dipentaerythritol stearate and pentaerythritol distearate are products of Haian Petrochemical Co., Ltd.;

[0074] Stearic acid and behenic acid are commercially available products;

[0075] Erucamide is a commercially available product;

[0076] Calcium stearate is a commercially available product;

[0077] Anti-dripping agent: X-010, polytetrafluoroethylene, Shandong Dongyue Polymer Materials Co., Ltd.;

[0078] The antioxidant is a mixture of phosphite antioxidant 168 produced by BASF and hindered phenol antioxidant 1010 mixed at a mass ratio of 2:1;

[0079] Unless otherwise specified, the component raw materials used in the examples and comparative examples of the present invention are all commercially available raw materials, and the component raw materials used in each parallel experiment are the same kind.

[0080] Table 1

[0081]

[0082]

[0083] Table 2

[0084]

[0085]

[0086] In order to verify the performance of the polypropylene composition of the present invention, the products prepared in each example and comparative example were subjected to the following performance tests, and the specific steps are as follows:

[0087] (1) Flame retardancy test: Each product was injection molded into a thin vertical spline with a thickness of 2 mm, and the flame retardancy grade test was carried out according to the UL94-2020 standard;

[0088] (2) Water resistance: Each product was injection molded into a color plate of 60*100*2 mm, and then 10 drops of water were dropped on the surface of the product with a dropper. After staying for 1 min, it was observed whether the product showed a whitening phenomenon;

[0089] (3) Damp heat whitening resistance: The product with the sample injection molded into 80*60*2 mm was placed in an oven at 85 °C and 85 RH% and left standing for 100 h. Then, after taking a photo, the photo was processed by software binarization, and the area ratio of the whitening of the product before and after processing was calculated;

[0090] The test results are shown in Tables 3 and 4.

[0091] Table 3

[0092]

[0093] Table 4

[0094]

[0095] As can be seen from Table 3 and Table 4, the polypropylene composition of the present invention can not only achieve an ideal flame retardant grade, achieving a flame retardant V-0 grade at 2 mm. Most importantly, due to the combined action of ethylene elastomer, polycaprolactone and a specific lubricant, the halogen-free flame retardant in the product can achieve ideal water inertness. The product will not turn white when directly contacted with water. Even after 100 h of double 85 damp heat treatment, the white area can be maintained within 21%, and the comprehensive appearance stability is excellent. If any one of the ethylene elastomer, polycaprolactone or lubricant components is missing, as shown in Comparative Example 1, Comparative Example 4, and Comparative Examples 7-8, the product cannot reach the same performance level, especially the appearance stability.

[0096] The notched Izod impact strength test was carried out on the products of each example: carried out according to ISO 180-2019, injection molded into test specimens of 80*10*4 mm, impact energy 2.75 J, Type A notch, and the test results were 3-5 kJ / m 2 , similar to the performance of existing products of the same type (such as NHPP-FR NC501), indicating that the use of the specific components in the product will not affect the basic toughness of the product.

[0097] From the comparison between Example 1 and Comparative Examples 2-3, it can be known that if the ethylene elastomer in the product is replaced with other types of toughening agent components, although a similar toughening effect can be achieved, the same halogen-free flame retardant coating effect and compatibility effect cannot be achieved, and the probability of the product turning white in appearance is relatively large. From the comparison between Example 1 and Examples 5-7, it can be seen that among the ethylene elastomers, the application effect of ethylene-propylene copolymer elastomer is the best, and a higher degree of damp heat resistance appearance stability can be achieved.

[0098] From the comparison between Example 1 and Comparative Examples 5-6, it can be seen that in the present invention, polycaprolactone as the third bridge phase of the matrix resin and the elastomer coating the halogen-free flame retardant is very crucial for the resistance to precipitation of the halogen-free flame retardant in the product under humid and hot environments. If it is replaced with a conventional compatibilizer or flow agent, the same effect cannot be achieved; from the comparison between Example 1 and Examples 8-10, it can be seen that the molecular weight of polycaprolactone will affect its own fluidity and its protection of the halogen-free flame retardant in the product, and thus affect the damp heat resistance and whiteness resistance of the product. When preferably in the range of 20000-70000 g / mol, the damp heat resistance and whiteness resistance of the product are better.

[0099] From the comparison between Example 1 and Comparative Examples 9 and 10, it can be seen that in the lubricant composition of the product of the present invention, hyperbranched polyester, stearate and fatty acid are all irreplaceable. Only under the synergistic action of the three, can each component achieve good dispersibility.

[0100] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit the protection scope of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A polypropylene composition, characterized in that The composition comprises the following components in parts by weight: 65-85 parts of polypropylene resin, 20-30 parts of halogen-free flame retardant, 3-8 parts of polyolefin elastomer, 1-5 parts of polycaprolactone, 0.05-0.4 parts of hyperbranched polyester, 0.02-0.2 parts of stearate and 0.02-0.2 parts of long-chain saturated fatty acid.

2. The polypropylene composition according to claim 1, characterized in that The melt flow rate of the polypropylene resin at 230° C. and a load of 2.16 kg is 0.2 to 35 g / 10 min.

3. The polypropylene composition according to claim 1, characterized in that The polyolefin elastomer includes at least one of ethylene-propylene copolymer elastomer, ethylene-butene copolymer elastomer and ethylene-octene copolymer elastomer.

4. The polypropylene composition according to claim 1, characterized in that The number average molecular weight of the polycaprolactone is 8000-90000 g / mol.

5. The polypropylene composition according to claim 1, characterized in that The halogen-free flame retardant includes at least one of ammonium polyphosphate, piperazine pyrophosphate, melamine polyphosphate, melamine pyrophosphate, triazine carbonizing agent, and melamine cyanurate.

6. The polypropylene composition according to claim 1, characterized in that The hyperbranched polyester is an aromatic hyperbranched polyester, and / or the stearate includes at least one of dipentaerythritol stearate and pentaerythritol distearate, and / or the long-chain saturated fatty acid has 17 to 24 carbon atoms.

7. The polypropylene composition according to claim 6, characterized in that The long-chain saturated fatty acid includes at least one of behenic acid and stearic acid.

8. The method for preparing the polypropylene composition according to any one of claims 1 to 7, characterized in that: The following steps are involved: The components are added into a screw extruder for melt extrusion and granulation to obtain the polypropylene composition.

9. Use of the polypropylene composition according to any one of claims 1 to 7 in the preparation of high temperature resistant equipment parts; preferably, the high temperature resistant equipment includes a heater and a new energy battery.

10. A high temperature resistant equipment component, characterized in that: It comprises the polypropylene composition according to any one of claims 1 to 7; preferably, the high temperature resistant equipment parts include heater housings, new energy battery covers, hot air delivery ducts, and electronic device protective shells.

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