KR-20260064876-A - Thermosetting Phenolic Composite, Method for Manufacturing the Same, and Automotive Parts Manufactured Using the Same

KR20260064876AKR 20260064876 AKR20260064876 AKR 20260064876AKR-20260064876-A

Abstract

The present invention relates to a thermosetting phenolic composite, a method for manufacturing the same, and an automobile part manufactured using the same. The objective of the present invention is to provide a method for recycling thermosetting resin waste and a manufacturing method by crushing sprues and runners discarded in thermosetting novolak phenolic resin composites and using them as fillers. The present invention aims to provide a thermosetting phenol composite and a method for manufacturing the same, which can enable the recycling of waste phenol resin, thereby reducing resource waste and preventing environmental pollution.

Inventors

남병욱
최인규
양세준
이태민

Assignees

한국기술교육대학교 산학협력단

Dates

Publication Date: 20260508
Application Date: 20241030

Claims (11)

Step of preparing silane-treated waste phenol resin, and A method comprising the step of mixing a thermosetting resin and the silane-treated waste phenol resin. Method for manufacturing a thermosetting phenolic complex.
In paragraph 1, The above silane-treated waste phenol resin is one treated with an amino silane, Method for manufacturing a thermosetting phenolic complex.
In paragraph 2, The above amino silane is 3-aminopropyltrimethoxysilane, Method for manufacturing a thermosetting phenolic complex.
In paragraph 1, The above thermosetting resin is a Novolac resin, Method for manufacturing a thermosetting phenolic complex.
In paragraph 1, The content of the above silane-treated waste phenol resin is 5 to 15 parts by weight per 100 parts by weight of the above thermosetting phenol composite, Method for manufacturing a thermosetting phenolic complex.
In paragraph 1, The above mixing step further includes a curing agent, Method for manufacturing a thermosetting phenolic complex.
In paragraph 1, The above mixing step further comprises glass fibers and/or fillers, Method for manufacturing a thermosetting phenolic complex.
A thermosetting resin and a silane-treated waste phenolic resin comprising Thermosetting phenol complex.
In paragraph 8, Manufactured by the method of paragraph 1, Thermosetting phenol complex.
In paragraph 8, The content of the above silane-treated waste phenol resin is 5 to 15 parts by weight per 100 parts by weight of the above thermosetting phenol composite, Thermosetting phenol complex.
Manufactured by molding a thermosetting phenolic composite, and The above thermosetting phenolic complex is that of claim 8, Car parts.

Description

Thermosetting Phenolic Composite, Method for Manufacturing the Same, and Automotive Parts Manufactured Using the Same The present invention relates to a thermosetting phenolic composite, a method for manufacturing the same, and an automobile part manufactured using the same. 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 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 thermosetting phenolic 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 compressive strength measurement results of the examples and comparative examples. Figure 4 shows the measurement results of the flexural modulus of the example and comparative example. Figure 5 shows the measurement results of the Charpy impact strength rate of the example and comparative example. Figure 6 shows the Rockwell hardness measurement results of the examples and comparative examples. Figure 7 shows the measurement results of the heat deformation temperature rate of the example and comparative example. Figure 8 shows the measurement results of the loss tangents 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 thermosetting phenol composite according to an embodiment of the present invention comprises the steps of preparing a silane-treated waste phenol resin and mixing the thermosetting resin and the silane-treated waste phenol resin. 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 byproducts 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 properties, it is difficult to reprocess or recycle once hardened. In the present invention, recycling efficiency can be increased by crushing waste phenol resin to an appropriate size. In one embodiment, the waste phenol resin may have an average diameter of 15