KR-20260064875-A - Polyamide Composite, Method for Manufacturing the Same, and Automotive Parts Manufactured Using the Same

Abstract

The present invention relates to a polyamide composite, a method for manufacturing the same, and an automotive part manufactured using the same. The polyamide composite of the present invention can be used as a material for manufacturing automotive parts, such as electric vehicle motor room covers. It is environmentally friendly by recycling waste phenolic resin. A method for manufacturing a polyamide composite according to an embodiment of the present invention comprises the steps of pre-treating waste phenol resin and mixing PA6 (Polyamide 6) and the pre-treated waste phenol resin.

Inventors

• 남병욱
• 최인규
• 양세준
• 이태민

Assignees

• 한국기술교육대학교 산학협력단

Dates

Publication Date

20260508

Application Date

20241030

Claims (10)

1. A step of pre-treating waste phenol resin, and A step comprising mixing PA6 (Polyamide 6) and the pretreated waste phenol resin, Method for manufacturing a polyamide composite.
2. In paragraph 1, The step of pre-treating the waste phenol resin above is to treat the waste phenol resin with epoxy silane, Method for manufacturing a polyamide composite.
3. In paragraph 2, The above epoxy silane is 3-Glycidoxypropyl trimethoxysilane, Method for manufacturing a polyamide composite.
4. In paragraph 2, The step of pretreating the waste phenol resin comprises the steps of hydrolyzing the epoxysilane into silanol, mixing the waste phenol resin with the hydrolyzed epoxysilane, and drying. Method for manufacturing a polyamide composite.
5. In paragraph 1, The content of the above-mentioned pretreated waste phenol resin is 5 to 20 phr with respect to the above-mentioned PA6, Method for manufacturing a polyamide composite.
6. Comprising pretreated waste phenol resin and PA6, Polyamide complex.
7. In paragraph 6, Manufactured by the method of paragraph 1, Polyamide complex.
8. In paragraph 6, The step of pre-treating the waste phenol resin above is to treat the waste phenol resin with epoxy silane, Polyamide complex.
9. In paragraph 6, The content of the above-mentioned pretreated waste phenol resin is 5 to 20 phr with respect to the above-mentioned PA6, Polyamide complex.
10. It comprises a polymer matrix and a polyamide composite dispersed and disposed in the polymer matrix, The above polyamide composite is that of claim 6, Car parts.

Description

Polyamide Composite, Method for Manufacturing the Same, and Automotive Parts Manufactured Using the Same The present invention relates to a polyamide composite, a method for manufacturing the same, and an automotive part manufactured using the same. The polyamide composite of the present invention can be used as a material for manufacturing automotive parts, such as electric vehicle motor room covers. It is environmentally friendly by recycling waste phenolic resin. The present invention was devised (conceived) as a result of the research on the "Research on the Improvement of High Heat Resistance and Mechanical Properties of Starter Motor Cover Materials for PHEV/HEV" of the Phase 3 Industry-Academic Cooperation Leading University Development Project (LINC 3.0), which was supported by funding from the Ministry of Education and the National Research Foundation of Korea. The objective of the present invention is to provide a method for recycling thermosetting resin waste and a method for manufacturing it by crushing sprues and runners discarded in thermosetting novolak phenolic resin composites and using them as fillers. Phenolic resin is a thermosetting resin widely used in various fields, such as electronic components, the electrical industry, and automotive parts, due to its excellent heat resistance and mechanical strength. However, because phenolic resin does not melt again once it is cured due to its thermosetting properties, it is difficult to recycle the waste resin. Due to these characteristics, the reuse of phenolic resin has been limited, and it is mainly disposed of as waste, causing environmental problems. In particular, waste such as sprues and runners generated during the manufacturing process of phenolic resins amounts to about 15–20% of the total production volume, and this accumulates as a significant amount of waste. Sprues and runners are used as pathways for plastic materials to move within the mold, and as unnecessary parts remaining after the product is molded, they are ultimately discarded. In the past, various physical and chemical methods have been studied to recycle discarded phenolic resins, but the difficulty of recycling remains a major problem. Phenolic resins generate by-products during thermal decomposition, and it is difficult to recover them as pure chemical raw materials. As a result, chemical recycling faces technical limitations and is not effective from an economic perspective. FIG. 1 is a flowchart of a method for manufacturing a polyamide composite according to an embodiment of the present invention. Figure 2 shows the tensile strength measurement results of the example and comparative example. Figure 3 shows the measurement results of the flexural modulus of the example and comparative example. Figure 4 shows the Izod impact strength measurement results of the examples and comparative examples. Figure 5 is an SEM image of the example and comparative example. Figure 6 shows the loss tangent measurement results of the example and comparative example. Figure 7 shows the measurement results of the storage modulus of the examples and comparative examples. Hereinafter, preferred embodiments of the present invention are described as follows with reference to the attached drawings. However, embodiments of the present invention may be modified in various other forms, and the scope of the present invention is not limited to the embodiments described below. Furthermore, embodiments of the present invention are provided to more completely explain the present invention to those skilled in the art. A method for manufacturing a polyamide composite according to an embodiment of the present invention comprises the steps of pre-treating waste phenol resin and mixing PA6 (Polyamide 6) and the pre-treated waste phenol resin. One embodiment may further include the step of molding using the mixture after the mixing step. A polyamide composite according to an embodiment of the present invention comprises pretreated waste phenol resin and PA6. One embodiment may be prepared by the method described above. In the step of pretreating the waste phenol resin mentioned above, the waste phenol resin is phenol resin collected for recycling and may be phenol resin by-products such as discarded sprues and runners. Phenolic resin is basically a polymer resin formed through a condensation reaction between phenol and formaldehyde. The chemical formulas of phenol and formaldehyde, which are the constituent units of phenol resin, are as follows. Phenol :C6H5OH Formaldehyde: CH₂O The basic structure formed by the condensation reaction of the above phenol and formaldehyde is a phenol unit connected to each other by a methylene bridge (-CH 2 -). The repeating unit of the phenol resin is -C 6 H 4 -CH 2 -C 6 H 4 -. The aforementioned waste phenol resin has the characteristic of maintaining a hard solid state after hardening at high temperatures during the manufacturing process, and due to its thermosetting pro