Low-temperature-resistant and impact-resistant polypropylene point dispensing cylinder

Abstract

The application relates to a low-temperature-resistant and impact-resistant polypropylene point glue cylinder and belongs to the technical field of point glue cylinders. The application creatively takes 1,2,3,6-tetrahydrophthalic anhydride and ethylenediamine as starting raw materials, realizes ring opening bonding based on the action of anhydride and amino, realizes amidation, obtains a nucleating agent containing two carbon-carbon double bonds, then takes thiol-alkene click addition as a basis, modifies the nucleating agent by using a certain amount of alkane thiol first to obtain a modified nucleating agent, and then chemically bonds the modified nucleating agent to the surface of thiol-modified nano calcium carbonate, so that the modified particles are prepared, and the modified particles, polypropylene and conventional auxiliaries are sequentially mixed, densified, and injection molded to prepare a low-temperature-resistant and impact-resistant polypropylene point glue cylinder. The point glue cylinder not only has very excellent impact resistance, but also has good low-temperature resistance. Even in a low-temperature environment, the impact resistance of the point glue cylinder also decreases less.

Description

Technical Field

[0001] The invention belongs to the technical field of glue dispensing cartridges, and in particular relates to a low-temperature-resistant and impact-resistant polypropylene glue dispensing cartridge. Background Art

[0002] A dispensing cylinder, also known as a dispensing syringe, is a container for storing glue in a pneumatic dispensing device. It is widely used in electronic packaging, semiconductor manufacturing and other fields. Polypropylene is mainly used as a raw material for the preparation of dispensing cylinders due to its advantages such as good chemical stability, heat resistance and weather resistance. However, existing polypropylene dispensing cylinders still have certain disadvantages that limit their actual application effects. This is because polypropylene itself has low impact strength, especially in low temperature environments, and its brittleness is significant, making it difficult to adapt to use in harsh environments, thus narrowing its scope of use. Although many existing technologies will adopt the means of adding nanoparticles for reinforcement and toughening, such as adding nano-calcium carbonate, these nanoparticles themselves are small in size and are prone to agglomeration between particles, and thus cannot play their due role well. Summary of the Invention

[0003] In response to the problems existing in the prior art, the purpose of the present invention is to provide a low-temperature resistant and impact-resistant polypropylene dispensing cylinder. The present invention creatively uses 1,2,3,6-tetrahydrophthalic anhydride and ethylenediamine as starting raw materials, and based on the action of acid anhydride and amino group, ring-opening bonding occurs to achieve amidation to obtain a nucleating agent containing two carbon-carbon double bonds. Then, based on the click addition of mercapto-ene, the nucleating agent is first modified with a certain amount of alkane thiol to obtain a modified nucleating agent, and then the modified nucleating agent is chemically bonded to the surface of mercapto-modified nano-calcium carbonate to obtain modified particles. After mixing, kneading and injection molding with polypropylene and conventional additives in sequence, a low-temperature resistant and impact-resistant polypropylene dispensing cylinder can be prepared. The cylinder not only has excellent impact resistance, but also has good low-temperature resistance. Even in a low-temperature environment, its impact resistance is less reduced.

[0004] The purpose of the present invention can be achieved through the following technical solutions:

[0005] A low-temperature-resistant and impact-resistant polypropylene dispensing cartridge is prepared from 100 parts by weight of polypropylene, 0.5-1 parts by weight of an antioxidant, 0.5 parts by weight of a lubricant, and 18-20 parts by weight of modified particles.

[0006] As a preferred technical solution of the present invention, the antioxidant is at least one of antioxidant 1010 and antioxidant 168.

[0007] As a preferred technical solution of the present invention, the lubricant is calcium stearate.

[0008] As a preferred technical solution of the present invention, the modified particles are prepared by the following steps:

[0009] (1) adding 3-4 parts by weight of 1,2,3,6-tetrahydrophthalic anhydride to 30-40 parts by weight of tetrahydrofuran, and then stirring at room temperature until completely dissolved to obtain solution A; adding ethylenediamine to 30-40 parts by weight of tetrahydrofuran, and then stirring at room temperature for 5-10 minutes to obtain solution B; adding solution B dropwise to solution A at room temperature while stirring, and continuing to stir at a constant temperature for 20-26 hours after all the addition is completed, filtering, taking the filter residue, washing it with tetrahydrofuran, and finally vacuum drying it at 60-80°C until constant weight, to obtain a nucleating agent;

[0010] (2) adding 6-7 parts by weight of a nucleating agent, 1 part by weight of an alkane thiol, and 0.5 parts by weight of azobisisobutyronitrile to 60 parts by weight of N,N-dimethylformamide, stirring and mixing at 85-95° C. for 6-8 hours, cooling naturally to room temperature, adding 300-350 parts by weight of tetrahydrofuran, filtering, taking the filter residue, washing it with tetrahydrofuran, and finally vacuum drying at 60-80° C. until constant weight, to obtain a modified nucleating agent;

[0011] (3) Add 3 parts by weight of a modified nucleating agent, 0.8-1 parts by weight of thiol-modified nano-calcium carbonate, and 0.5 parts by weight of azobisisobutyronitrile to 60 parts by weight of N,N-dimethylformamide, and then stir and mix at 85-95°C for 6-8 hours, filter, take the filter residue, wash with ethanol, and finally vacuum dry at 60-80°C until constant weight, and the preparation is completed.

[0012] Furthermore, in step (1), the molar ratio of the 1,2,3,6-tetrahydrophthalic anhydride to the ethylenediamine is 2.1-2.2:1.

[0013] Furthermore, the dropping rate in step (1) is controlled at 1-2 s / drop.

[0014] Furthermore, the alkane thiol in step (2) is hexadecanethiol or octadecanethiol.

[0015] Furthermore, the thiol-modified nano-calcium carbonate in step (3) is prepared by the following steps:

[0016] 70-80 parts by weight of ethanol, 10-20 parts by weight of deionized water, 1 part by weight of nano-calcium carbonate and 0.5-1 part by weight of γ-mercaptopropyltrimethoxysilane are mixed under ultrasonic stirring at 70-75°C for 12-14 hours, filtered, and the filter residue is washed with ethanol and finally vacuum dried at 60-80°C until constant weight. The preparation is completed.

[0017] Preferably, the power of the ultrasound is 300-500W.

[0018] A method for preparing a low-temperature-resistant and impact-resistant polypropylene dispensing cartridge, the method comprising the following steps:

[0019] The polypropylene, antioxidant, lubricant and modified particles are mixed, then kneaded using a torque rheometer and injection molded to complete the preparation.

[0020] Furthermore, the operating parameters of the torque rheometer are as follows: the temperature of zone 1 is controlled at 200-210°C, the temperature of zone 2 is controlled at 200-210°C, the temperature of zone 3 is controlled at 200-210°C, and the time is controlled at 5-10 minutes.

[0021] Furthermore, the injection molding pressure is 100 MPa; the injection molding speed is 80 mm / s.

[0022] Beneficial effects of the present invention:

[0023] (1) The present invention creatively uses 1,2,3,6-tetrahydrophthalic anhydride and ethylenediamine as starting materials, and based on the action of anhydride and amino group, ring-opening bonding occurs to achieve amidation, thereby obtaining a nucleating agent containing two carbon-carbon double bonds. Then, based on the click addition of thiol-ene, the nucleating agent is first modified with a certain amount of alkane thiol to obtain a modified nucleating agent, and then the modified nucleating agent is chemically bonded to the surface of thiol-modified nano-calcium carbonate to obtain modified particles. After mixing, kneading and injection molding with polypropylene and conventional additives in sequence, a low-temperature and impact-resistant polypropylene dispensing cylinder can be prepared. The cylinder not only has excellent impact resistance but also good low-temperature resistance. Even in a low-temperature environment, its impact resistance is less reduced.

[0024] (2) The present invention creatively uses 1,2,3,6-tetrahydrophthalic anhydride and ethylenediamine as starting materials, and based on the action of anhydride and amino group, ring-opening bonding occurs to achieve amidation, thereby obtaining a nucleating agent containing two carbon-carbon double bonds. On the one hand, the presence of the two carbon-carbon double bonds can provide feasibility for subsequent further processing. On the other hand, the nucleating agent has the effect of inducing polypropylene to generate β crystals, which can effectively improve the toughness of polypropylene, enhance impact resistance, and promote low-temperature resistance. Then, based on the click addition of mercapto-ene, the nucleating agent is first modified with a certain amount of alkane thiol to obtain a modified Compared with the unmodified nucleating agent, the modified nucleating agent has an alkane molecular structure, which can enhance its own non-polarity. According to the principle of "like dissolves like", it can better match the polypropylene, which is also non-polar, greatly improving the interfacial adhesion effect of the two and exerting an excellent induction effect of β crystals. Then, the modified nucleating agent is chemically bonded to the surface of the thiol-modified nano-calcium carbonate to obtain modified particles. Through the introduction of nano-calcium carbonate, the nano-calcium carbonate and the modified nucleating agent can produce a good synergistic effect, and together give the final prepared dispensing tube more excellent impact resistance and low temperature resistance. Different from the prior art, which simply compounded the nucleating agent with the nano-calcium carbonate, the modified particles of the present invention form a structure similar to the nucleating agent "coated" nano-calcium carbonate, which not only effectively solves the agglomeration problem of nano-calcium carbonate and has good dispersibility, but also the compounding between each other enables the modified particles to better transmit and consume energy when acting as stress concentration points, stop crack propagation, and resist greater external forces. DETAILED DESCRIPTION

[0025] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the invention, the specific implementation methods, structures, features and effects of the present invention are described in detail below in combination with the embodiments.

[0026] The polypropylene in all the embodiments and comparative examples of the present invention was purchased from Yangzi Petrochemical Company with the brand name F401; the nano calcium carbonate was purchased from Zhejiang Manli Nanotechnology Co., Ltd. with the model name ML-CaCo3-N50 and a particle size of 50 nm.

[0027] Example 1

[0028] A low-temperature-resistant and impact-resistant polypropylene dispensing cartridge is prepared from 100 parts by weight of polypropylene, 0.5 parts by weight of an antioxidant, 0.5 parts by weight of a lubricant, and 18 parts by weight of modified particles.

[0029] The antioxidant is antioxidant 1010.

[0030] The lubricant is calcium stearate.

[0031] The modified particles are prepared by the following steps:

[0032] (1) adding 3 parts by weight of 1,2,3,6-tetrahydrophthalic anhydride to 30 parts by weight of tetrahydrofuran, and then stirring at room temperature until completely dissolved to obtain solution A; adding ethylenediamine to 30 parts by weight of tetrahydrofuran, and then stirring at room temperature for 5 minutes to obtain solution B; adding solution B dropwise to solution A at room temperature while stirring, and continuing to stir at a constant temperature for 20 hours after all the addition is completed, filtering, taking the filter residue, washing it with tetrahydrofuran, and finally vacuum drying it at 60°C until constant weight, to obtain a nucleating agent;

[0033] (2) adding 6 parts by weight of a nucleating agent, 1 part by weight of an alkane thiol, and 0.5 parts by weight of azobisisobutyronitrile to 60 parts by weight of N,N-dimethylformamide, stirring and mixing at 85°C for 6 hours, cooling naturally to room temperature, adding 300 parts by weight of tetrahydrofuran, filtering, taking the filter residue, washing it with tetrahydrofuran, and finally drying it in vacuum at 60°C until constant weight, to obtain a modified nucleating agent;

[0034] (3) Add 3 parts by weight of a modified nucleating agent, 0.8 parts by weight of thiol-modified nano-calcium carbonate, and 0.5 parts by weight of azobisisobutyronitrile to 60 parts by weight of N,N-dimethylformamide, and then stir and mix at 85°C for 6 hours, filter, take the filter residue, wash with ethanol, and finally vacuum dry at 60°C until constant weight, and the preparation is completed.

[0035] The molar ratio of the 1,2,3,6-tetrahydrophthalic anhydride to the ethylenediamine in step (1) is 2.1:1.

[0036] The rate of the dropwise addition in step (1) is controlled at 1s / drop.

[0037] The alkanethiol in step (2) is octadecyl mercaptan.

[0038] The thiol-modified nano-calcium carbonate in step (3) is prepared by the following steps:

[0039] 70 parts by weight of ethanol, 10 parts by weight of deionized water, 1 part by weight of nano-calcium carbonate and 0.5 parts by weight of γ-mercaptopropyltrimethoxysilane were mixed under ultrasonic stirring at 70° C. for 12 hours, filtered, and the filter residue was washed with ethanol and finally vacuum dried at 60° C. until constant weight. The preparation was completed.

[0040] The power of the ultrasound is 300W.

[0041] A method for preparing a low-temperature-resistant and impact-resistant polypropylene dispensing cartridge, the method comprising the following steps:

[0042] The polypropylene, antioxidant, lubricant and modified particles are mixed, then kneaded using a torque rheometer and injection molded to complete the preparation.

[0043] The operating parameters of the torque rheometer are as follows: the temperature of zone 1 is controlled at 200° C., the temperature of zone 2 is controlled at 200° C., the temperature of zone 3 is controlled at 200° C., and the time is controlled at 5 minutes.

[0044] The injection molding pressure is 100 MPa; the injection molding speed is 80 mm / s.

[0045] Example 2

[0046] A low-temperature-resistant and impact-resistant polypropylene dispensing cartridge is prepared from 100 parts by weight of polypropylene, 1 part by weight of an antioxidant, 0.5 parts by weight of a lubricant, and 20 parts by weight of modified particles.

[0047] The antioxidant is antioxidant 1010.

[0048] The lubricant is calcium stearate.

[0049] The modified particles are prepared by the following steps:

[0050] (1) adding 4 parts by weight of 1,2,3,6-tetrahydrophthalic anhydride to 40 parts by weight of tetrahydrofuran, and then stirring at room temperature until completely dissolved to obtain solution A; adding ethylenediamine to 40 parts by weight of tetrahydrofuran, and then stirring at room temperature for 10 minutes to obtain solution B; adding solution B dropwise to solution A at room temperature while stirring, and continuing to stir at a constant temperature for 26 hours after all the addition is completed, filtering, taking the filter residue, washing it with tetrahydrofuran, and finally vacuum drying it at 80°C until constant weight, to obtain a nucleating agent;

[0051] (2) adding 7 parts by weight of a nucleating agent, 1 part by weight of an alkane thiol, and 0.5 parts by weight of azobisisobutyronitrile to 60 parts by weight of N,N-dimethylformamide, stirring and mixing at 95°C for 8 hours, cooling naturally to room temperature, adding 350 parts by weight of tetrahydrofuran, filtering, taking the filter residue, washing it with tetrahydrofuran, and finally drying it in vacuum at 80°C until constant weight, to obtain a modified nucleating agent;

[0052] (3) Add 3 parts by weight of a modified nucleating agent, 1 part by weight of thiol-modified nano-calcium carbonate, and 0.5 parts by weight of azobisisobutyronitrile to 60 parts by weight of N,N-dimethylformamide, and then stir and mix at 95°C for 8 hours, filter, take the filter residue, wash it with ethanol, and finally vacuum dry it at 80°C until constant weight. The preparation is completed.

[0053] The molar ratio of the 1,2,3,6-tetrahydrophthalic anhydride to the ethylenediamine in step (1) is 2.2:1.

[0054] The rate of the dropwise addition in step (1) is controlled at 2s / drop.

[0055] The alkanethiol in step (2) is octadecyl mercaptan.

[0056] The thiol-modified nano-calcium carbonate in step (3) is prepared by the following steps:

[0057] 80 parts by weight of ethanol, 20 parts by weight of deionized water, 1 part by weight of nano-calcium carbonate and 1 part by weight of γ-mercaptopropyltrimethoxysilane were mixed under ultrasonic stirring at 75° C. for 14 hours, filtered, and the filter residue was washed with ethanol and finally vacuum dried at 80° C. until constant weight. The preparation was completed.

[0058] The power of the ultrasound is 500W.

[0059] A method for preparing a low-temperature-resistant and impact-resistant polypropylene dispensing cartridge, the method comprising the following steps:

[0060] The polypropylene, antioxidant, lubricant and modified particles are mixed, then kneaded using a torque rheometer and injection molded to complete the preparation.

[0061] The operating parameters of the torque rheometer are as follows: the temperature of zone 1 is controlled at 210° C., the temperature of zone 2 is controlled at 210° C., the temperature of zone 3 is controlled at 210° C., and the time is controlled at 10 min.

[0062] The injection molding pressure is 100 MPa; the injection molding speed is 80 mm / s.

[0063] Example 3

[0064] A low-temperature-resistant and impact-resistant polypropylene dispensing cartridge is prepared from 100 parts by weight of polypropylene, 0.8 parts by weight of an antioxidant, 0.5 parts by weight of a lubricant, and 19 parts by weight of modified particles.

[0065] The antioxidant is antioxidant 1010.

[0066] The lubricant is calcium stearate.

[0067] The modified particles are prepared by the following steps:

[0068] (1) adding 3.5 parts by weight of 1,2,3,6-tetrahydrophthalic anhydride to 35 parts by weight of tetrahydrofuran, and then stirring at room temperature until completely dissolved to obtain solution A; adding ethylenediamine to 35 parts by weight of tetrahydrofuran, and then stirring at room temperature for 8 minutes to obtain solution B; adding solution B dropwise to solution A at room temperature while stirring, and continuing to stir at a constant temperature for 24 hours after all the addition is completed, filtering, taking the filter residue, washing it with tetrahydrofuran, and finally vacuum drying it at 70°C until constant weight, to obtain a nucleating agent;

[0069] (2) adding 6.5 parts by weight of a nucleating agent, 1 part by weight of an alkane thiol, and 0.5 parts by weight of azobisisobutyronitrile to 60 parts by weight of N,N-dimethylformamide, stirring and mixing at 90°C for 7 hours, cooling naturally to room temperature, adding 330 parts by weight of tetrahydrofuran, filtering, taking the filter residue, washing it with tetrahydrofuran, and finally drying it in vacuo at 70°C until constant weight, to obtain a modified nucleating agent;

[0070] (3) Add 3 parts by weight of a modified nucleating agent, 0.9 parts by weight of thiol-modified nano-calcium carbonate, and 0.5 parts by weight of azobisisobutyronitrile to 60 parts by weight of N,N-dimethylformamide, and then stir and mix at 90°C for 7 hours, filter, take the filter residue, wash it with ethanol, and finally vacuum dry it at 70°C until constant weight. The preparation is completed.

[0071] The molar ratio of the 1,2,3,6-tetrahydrophthalic anhydride to the ethylenediamine in step (1) is 2.15:1.

[0072] The rate of the dropwise addition in step (1) is controlled at 1.5 s / drop.

[0073] The alkanethiol in step (2) is octadecyl mercaptan.

[0074] The thiol-modified nano-calcium carbonate in step (3) is prepared by the following steps:

[0075] 75 parts by weight of ethanol, 15 parts by weight of deionized water, 1 part by weight of nano-calcium carbonate and 0.8 parts by weight of γ-mercaptopropyltrimethoxysilane were mixed under ultrasonic stirring at 73° C. for 13 h, filtered, and the filter residue was washed with ethanol and finally vacuum dried at 70° C. until constant weight. The preparation was completed.

[0076] The power of the ultrasound is 400W.

[0077] A method for preparing a low-temperature-resistant and impact-resistant polypropylene dispensing cartridge, the method comprising the following steps:

[0078] The polypropylene, antioxidant, lubricant and modified particles are mixed, then kneaded using a torque rheometer and injection molded to complete the preparation.

[0079] The operating parameters of the torque rheometer are as follows: the temperature of zone 1 is controlled at 205° C., the temperature of zone 2 is controlled at 205° C., the temperature of zone 3 is controlled at 205° C., and the time is controlled at 8 minutes.

[0080] The injection molding pressure is 100 MPa; the injection molding speed is 80 mm / s.

[0081] Comparative Example 1

[0082] On the basis of Example 3, step (2) was not performed, and the modified nucleating agent in step (3) was replaced with a nucleating agent of equal weight, while the rest remained unchanged.

[0083] Comparative Example 2

[0084] On the basis of Example 3, steps (1) and (2) were omitted, and in step (3), the modified nucleating agent and azobisisobutyronitrile were replaced by equal weights of N,N-dimethylformamide, while the rest remained unchanged.

[0085] Comparative Example 3

[0086] On the basis of Example 3, step (3) is changed to mixing the modified nucleating agent and the thiol-modified nano-calcium carbonate in a mass ratio of 1:12, and the preparation is completed; the rest remains unchanged.

[0087] Comparative Example 4

[0088] On the basis of Example 3, step (3) is changed to mixing the modified nucleating agent and polypropylene in a mass ratio of 1:12, and the preparation is completed; the rest remain unchanged.

[0089] Test Example 1

[0090] Impact strength test:

[0091] The raw materials of Example 3 and Comparative Examples 1-4, namely, polypropylene, antioxidant, lubricant, and modified particles, were respectively placed in a torque rheometer and mixed (temperature of 200°C, speed of 60 rpm, time of 5 min), and then hot-pressed (temperature of 200°C, pressure of 10 MPa, time of 3 min) to obtain various test samples; the test samples were subjected to a notched Izod impact strength test (type A notch) at 23°C in accordance with standard GB / T1843-2008.

[0092] Table 1. Impact strength test results

[0093] <![CDATA[悬臂梁缺口冲击强度 / kJ·m -2 ]]> Example 3 7.90 Comparative Example 1 5.89 Comparative Example 2 4.12 Comparative Example 3 6.64 Comparative Example 4 4.77

[0094] Test Example 2

[0095] Low temperature resistance test:

[0096] The raw materials of the formulation in Example 3 and Comparative Examples 1-4, i.e. polypropylene, antioxidant, lubricant and modified particles, were mixed in a torque rheometer (temperature 200℃, rotation speed 60rpm, time 5min), and then hot-pressing molding (temperature 200℃, pressure 10MPa, time 3min) was performed to obtain various test samples; the test samples were subjected to Izod impact strength test (A type notch) at -20℃ according to standard GB / T1843-2008.

[0097] Table 2. Results of low temperature resistance test

[0098] <![CDATA[悬臂梁缺口冲击强度 / kJ·m -2 ]]> Example 3 6.99 Comparative Example 1 4.91 Comparative Example 2 2.75 Comparative Example 3 5.43 Comparative Example 4 3.47

[0099] As can be seen from the comparison of Example 3, Comparative Examples 1-4 and Test Examples 1-2, the glue dispensing barrel prepared in the present application not only has excellent impact resistance, but also has good low temperature resistance, and its impact resistance decreases less even in a low temperature environment.

[0100] The above description is only the preferred embodiments of the present application, and does not limit the present application in any form. Although the present application has been disclosed as above with the preferred embodiments, it is not intended to limit the present application, and any person skilled in the art can make some changes or modifications to the above disclosed technical content to obtain equivalent embodiments with equivalent changes, without departing from the technical solution of the present application. Any modification, equivalent change and modification of the above embodiments, which does not depart from the technical solution of the present application, and is based on the technical essence of the present application, shall still fall within the scope of the technical solution of the present application.

Claims

1. A low-temperature-resistant and impact-resistant polypropylene dispensing cartridge, characterized by: The low-temperature-resistant and impact-resistant polypropylene dispensing cartridge is prepared from 100 parts by weight of polypropylene, 0.5-1 parts by weight of an antioxidant, 0.5 parts by weight of a lubricant, and 18-20 parts by weight of modified particles; The modified particles are prepared by the following steps: (1) Add 3-4 parts by weight of 1,2,3,6-tetrahydrophthalic anhydride to 30-40 parts by weight of tetrahydrofuran, and then stir at room temperature until completely dissolved to obtain solution A; add ethylenediamine to 30-40 parts by weight of tetrahydrofuran, and then stir at room temperature for 5-10 minutes to obtain solution B; add solution B dropwise to solution A at room temperature while stirring, continue stirring at constant temperature for 20-26 hours after all the addition is completed, filter, take the filter residue, wash it with tetrahydrofuran, and finally vacuum dry it at 60-80°C until constant weight, to obtain a nucleating agent; (2) Add 6-7 parts by weight of a nucleating agent, 1 part by weight of alkane thiol and 0.5 parts by weight of azobisisobutyronitrile to 60 parts by weight of N,N-dimethylformamide, then stir and mix at 85-95°C for 6-8 hours, cool naturally to room temperature, add 300-350 parts by weight of tetrahydrofuran, filter, take the filter residue, wash it with tetrahydrofuran, and finally vacuum dry it at 60-80°C until constant weight, to obtain a modified nucleating agent; (3) Add 3 parts by weight of a modified nucleating agent, 0.8-1 parts by weight of thiol-modified nano-calcium carbonate, and 0.5 parts by weight of azobisisobutyronitrile to 60 parts by weight of N,N-dimethylformamide, and then stir and mix at 85-95°C for 6-8 hours, filter, take the filter residue, wash with ethanol, and finally vacuum dry at 60-80°C until constant weight, and the preparation is completed; The molar ratio of the 1,2,3,6-tetrahydrophthalic anhydride to the ethylenediamine in step (1) is 2.1-2.2:1; The alkanethiol in step (2) is octadecyl mercaptan.

2. The low-temperature-resistant and impact-resistant polypropylene dispensing cartridge according to claim 1, characterized in that: The antioxidant is at least one of the antioxidant 1010 and the antioxidant 168 .

3. The low-temperature-resistant and impact-resistant polypropylene dispensing cartridge according to claim 1, characterized in that: The lubricant is calcium stearate.

4. The low-temperature-resistant and impact-resistant polypropylene dispensing cartridge according to claim 1, characterized in that: The rate of the dropwise addition in step (1) is controlled at 1-2 s / drop.

5. The low-temperature-resistant and impact-resistant polypropylene dispensing cartridge according to claim 1, characterized in that: The thiol-modified nano-calcium carbonate in step (3) is prepared by the following steps: 70-80 parts by weight of ethanol, 10-20 parts by weight of deionized water, 1 part by weight of nano-calcium carbonate and 0.5-1 part by weight of γ-mercaptopropyltrimethoxysilane are mixed under ultrasonic stirring at 70-75°C for 12-14 hours, filtered, and the filter residue is washed with ethanol and finally vacuum dried at 60-80°C until constant weight. The preparation is completed.

6. The low-temperature-resistant and impact-resistant polypropylene dispensing cartridge according to claim 5, characterized in that: The power of the ultrasound is 300-500W.

7. A method for preparing the low-temperature-resistant and impact-resistant polypropylene dispensing cartridge according to any one of claims 1 to 6, characterized in that: The preparation method comprises the following steps: The polypropylene, antioxidant, lubricant and modified particles are mixed, then kneaded using a torque rheometer and injection molded to complete the preparation.