High-temperature-resistant thermoplastic flame-retardant material for automobiles and preparation method thereof

Abstract

The invention belongs to the technical field of flame-retardant materials, and discloses a high-temperature-resistant thermoplastic flame-retardant material for an automobile and a preparation method of the high-temperature-resistant thermoplastic flame-retardant material. 4 parts of glass fiber; 2 parts of a flame retardant; 1 part of an additive; and 3 parts of inorganic mineral filler. By adding the inorganic mineral filler and the flame retardant, the heat resistance of the material is further improved, it is ensured that the automobile lamp shell can still keep stable performance in a high-temperature environment, cracking caused by thermal expansion and cold contraction is avoided, in addition, the material is endowed with good processability through thermoplasticity of polyamide 66, and the service life of the automobile lamp shell is prolonged. According to the composite material disclosed by the invention, the automobile lamp shell can be more easily molded into a complicated shape and structure in the manufacturing process, and meanwhile, the precision and the quality of a product are ensured, so that the risk of cracking or damage is reduced, and the composite material has a unique advantage in the aspect of preventing automobile parts from cracking or damage.

Description

Technical Field

[0001] The invention belongs to the technical field of flame retardant materials, and specifically relates to a high-temperature resistant thermoplastic flame retardant material for automobiles and a preparation method thereof. Background Art

[0002] With the rapid development of the automobile industry, the requirements for automobile materials are also increasing, especially in terms of high temperature resistance, flame retardancy and mechanical strength, which require better performance.

[0003] In the preparation process of automobile lamp materials, polycarbonate, acrylate, polypropylene and other materials are often needed. These materials have high strength, high toughness and impact resistance, as well as good light transmittance and UV resistance. However, in high temperatures in summer, due to the poor heat resistance of acrylate, it is easy to deform or damage in high temperature environments, resulting in varying degrees of cracking in the lamp housing. Therefore, it needs to be improved. Summary of the invention

[0004] The object of the present invention is to provide a high temperature resistant thermoplastic flame retardant material for automobiles and a preparation method thereof, so as to solve the problems raised in the above background technology.

[0005] In order to achieve the above object, the present invention provides the following technical solution: A high temperature resistant thermoplastic flame retardant material for automobiles, comprising the following raw material components in parts by weight:

[0006]

[0007] Preferably, the flame retardant is a mixture of aluminum hydroxide, phosphorus-based flame retardant and other flame retardants, wherein the weight ratio of the mixture is 5 to 7:2 to 4:1.

[0008] Preferably, the polyamide 66 is prepared by mixing adipic acid and hexamethylenediamine in a molar ratio of 1:1, and the pH value during the mixing reaction of the adipic acid and hexamethylenediamine is 6.7-7.9.

[0009] Preferably, the raw material of the glass fiber is made by melting a mixture of silica sand, limestone, sodium carbonate, fluoride and other additives;

[0010] In terms of weight percentage, the principle formula of the glass fiber is as follows:

[0011]

[0012] Among them, other additives are aluminum oxide and metal oxides.

[0013] Preferably, the glass limiting principle uses a glass kiln for melting, and the temperature is controlled between 1400°C and 1700°C.

[0014] Preferably, the additive is a mixture of an antioxidant, a lubricant, a plasticizer, a pigment and a filler, wherein:

[0015] The mixing ratio of antioxidant, lubricant and plasticizer is 0.1-5:0.5-5:5-50;

[0016] The mixing ratio of pigment to filler is 1-10:5-70.

[0017] Preferably, the inorganic mineral filler is a mixture of talc and wollastonite.

[0018] Preferably, the steps include:

[0019] S1, drying the polyamide 66, cutting and surface treating the glass fiber;

[0020] S2. Use metering equipment to accurately weigh polyamide 66, glass fiber, flame retardant, additives and inorganic mineral fillers according to the formula ratio, put the weighed materials into a high-speed mixer and mix them evenly;

[0021] S3, feeding the mixed material into a twin-screw extruder for melt extrusion, setting the extrusion temperature to 260-280°C, and setting the screw speed to 200-300rpm;

[0022] S4, cooling the molten material through a cooling water tank to shape it and cutting it into the required length, and inspecting the quality of the cut material;

[0023] S5. Package qualified products and mark relevant information. Store the packaged products in a dry, cool place, avoiding direct sunlight and high temperature environment.

[0024] The beneficial effects of the present invention are as follows:

[0025] 1. The present invention significantly improves the mechanical strength and toughness of the composite material by adding glass fiber for reinforcement, so that parts such as the lamp housing are not easy to crack or break when subjected to external impact. At the same time, the addition of inorganic mineral fillers and flame retardants further improves the heat resistance of the material, ensuring that the lamp housing can still maintain stable performance in a high temperature environment and avoid cracking due to thermal expansion and contraction. In addition, the thermoplasticity of polyamide 66 gives the material good processing properties, making it easier to shape the lamp housing into complex shapes and structures during the manufacturing process, while ensuring the accuracy and quality of the product, thereby reducing the risk of cracking or breakage, so that this composite material has a unique advantage in preventing cracking or breakage of automotive parts.

[0026] 2. The present invention can significantly improve the heat deformation resistance and rigidity of thermoplastics by adding glass fiber, and reduce the chance of the material reacting with oxygen at high temperature through additives, thereby extending the service life of the material, thereby achieving the improvement of material performance, increasing production efficiency, reducing costs and meeting specific application requirements.

[0027] 3. The preparation method of the high temperature resistant thermoplastic flame retardant material provided by the present invention has simple process, easy operation and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 The present invention is a flow chart of the preparation method. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] Example 1

[0031] The embodiment of the present invention provides a high temperature resistant thermoplastic flame retardant material for automobiles and a preparation method thereof, comprising the following raw material components in parts by weight:

[0032]

[0033] In this example, the following steps are included:

[0034] S1, drying the polyamide 66, cutting and surface treating the glass fiber;

[0035] S2. Use metering equipment to accurately weigh polyamide 66, glass fiber, flame retardant, additives and inorganic mineral fillers according to the formula ratio, put the weighed materials into a high-speed mixer and mix them evenly;

[0036] S3, feeding the mixed material into a twin-screw extruder for melt extrusion, setting the extrusion temperature to 260-280°C, and setting the screw speed to 200-300rpm;

[0037] S4, cooling the molten material through a cooling water tank to shape it and cutting it into the required length, and inspecting the quality of the cut material;

[0038] S5. Package qualified products and mark relevant information. Store the packaged products in a dry, cool place, avoiding direct sunlight and high temperature environment.

[0039] Example 2

[0040] A high temperature resistant thermoplastic flame retardant material for automobiles and a preparation method thereof, comprising the following raw material components in parts by weight:

[0041]

[0042] 8 parts of inorganic mineral filler;

[0043] In this example, the following steps are included:

[0044] S1, drying the polyamide 66, cutting and surface treating the glass fiber;

[0045] S2. Use metering equipment to accurately weigh polyamide 66, glass fiber, flame retardant, additives and inorganic mineral fillers according to the formula ratio, put the weighed materials into a high-speed mixer and mix them evenly;

[0046] S3, feeding the mixed material into a twin-screw extruder for melt extrusion, setting the extrusion temperature to 340°C and the screw speed to 300rpm;

[0047] S4, cooling the molten material through a cooling water tank to shape it and cutting it into the required length, and inspecting the quality of the cut material;

[0048] S5. Package qualified products and mark relevant information. Store the packaged products in a dry, cool place, avoiding direct sunlight and high temperature environment.

[0049] Example 3

[0050] A high temperature resistant thermoplastic flame retardant material for automobiles and a preparation method thereof, comprising the following raw material components in parts by weight:

[0051]

[0052] In this example, the following steps are included:

[0053] S1, drying the polyamide 66, cutting and surface treating the glass fiber;

[0054] S2. Use metering equipment to accurately weigh polyamide 66, glass fiber, flame retardant, additives and inorganic mineral fillers according to the formula ratio, put the weighed materials into a high-speed mixer and mix them evenly;

[0055] S3, feeding the mixed material into a twin-screw extruder for melt extrusion, setting the extrusion temperature to 240°C and the screw speed to 200 rpm;

[0056] S4, cooling the molten material through a cooling water tank to shape it and cutting it into the required length, and inspecting the quality of the cut material;

[0057] S5. Package qualified products and mark relevant information. Store the packaged products in a dry, cool place, avoiding direct sunlight and high temperature environment.

[0058] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0059] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high temperature resistant thermoplastic flame retardant material for automobiles, characterized in that: The invention comprises the following raw material components in parts by weight:

2. The high temperature resistant thermoplastic flame retardant material for automobiles according to claim 1, characterized in that: The flame retardant is a mixture composed of aluminum hydroxide, a phosphorus-based flame retardant, and other flame retardant, and is composed of 5 to 7:2 to 4:1 by weight ratio.

3. The high temperature resistant thermoplastic flame retardant material for automobiles according to claim 1, characterized in that: The polyamide 66 is made of a mixture of adipic acid and hexyldiamine in a molar ratio of 1:

1. The pH value during the mixing reaction between the adipic acid and hexyldiamine is 6.7 to 7.

9.

4. The high temperature resistant thermoplastic flame retardant material for automobiles according to claim 1, characterized in that: The raw materials of the glass fiber are made of melted mixtures of silica sand, limestone, sodium carbonate, fluoride and other additives; The principle formulation of the glass fiber is as follows in weight percentage: Among them, the other additives are alumina and metal oxides.

5. The high temperature resistant thermoplastic flame retardant material for automobiles according to claim 1, characterized in that: The principle of the glass limit is melted using a glass kiln, and its temperature is controlled between 1400°C and 1700°C.

6. A high temperature resistant thermoplastic flame retardant material for automobiles according to claim 1, characterized in that: The additive is made of a mixture of antioxidants, lubricants, plasticizers, pigments and fillers, wherein: The mixing ratio of antioxidants, lubricants and plasticizers is 0.1-5:0.5-5:5-50; The mixing ratio of pigments and fillers is 1 to 10:5 to 70.

7. A high temperature resistant thermoplastic flame retardant material for automobiles according to claim 1, characterized in that: The inorganic mineral filler is a mixture of talc and wollastonite.

8. A high temperature resistant thermoplastic flame retardant material for automobiles according to claim 1 and a preparation method thereof, characterized in that: The following steps are involved: S1. The polyamide 66 is dried, and the glass fiber is cut and surface treated; S2. Use metering equipment to accurately weigh polyamide 66, glass fiber, flame retardant, additives and inorganic mineral fillers according to the formula ratio, put the weighed materials into a high-speed mixer and mix them evenly; S3. Send the mixed material to a twin screw extruder for melt extrusion, set the extrusion temperature to 260-280℃, and set the screw speed to 200-300rpm; S4. Cool the molten material through the cooling water tank and cut it to the required length, and conduct quality inspection of the cut materials; S5. Package qualified products and mark relevant information. Store the packaged products in a dry and cool place to avoid direct sunlight and high temperature environment.

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