Elastic material composition, preparation method thereof and plastic part

Abstract

The invention relates to an elastic material composition, a preparation method thereof and a plastic part. The elastic material composition is prepared from the following raw material components in parts by weight: 60 to 90 parts of first resin, 1 to 30 parts of second resin and 10 to 40 parts of elastic aid, the first resin is prepared from one or more of an acrylonitrile-butadiene-styrene terpolymer, a styrene-acrylonitrile copolymer and a styrene-acrylonitrile-acrylic rubber terpolymer; the second resin is prepared from one or more of polycarbonate, silicon copolymerized polycarbonate, polybutylene terephthalate, polyethylene glycol terephthalate and polymethacrylic acid glyceride. The elastic material composition has good compatibility with hard plastic parts such as polycarbonate, high bonding strength after coating, low hardness, high impact strength and good elasticity.

Description

Technical Field

[0001] This application relates to the field of resin materials technology, and in particular to an elastic material composition, a method for preparing the same, and plastic parts thereof. Background Technology

[0002] To meet requirements such as vibration reduction, traditional rigid plastic parts often need to have soft plastic materials such as foam or thermoplastic elastomer (TPE) glued to their surface.

[0003] However, it is difficult to automate the bonding of foam to complex parts, resulting in low production efficiency, high costs, and a certain probability of defective products. Furthermore, the production of foam involves adhesives and solvents, which also pose environmental pollution problems. After the product is discarded, the plastic parts with foam bonding are not easy to recycle. Although traditional TPE materials can avoid these problems of foam to some extent, their compatibility with rigid plastic parts such as polycarbonate (PC) is poor. After being co-extruded or two-color injection molded onto the surface of rigid plastic parts, the bonding strength is low and they are relatively easy to fall off. Summary of the Invention

[0004] Based on this, this application provides an elastic material composition, a method for preparing the same, and a plastic part thereof. This elastic material composition exhibits good compatibility with rigid plastic parts such as polycarbonate (PC), high bonding strength after coating, low hardness, high impact strength, and good elasticity.

[0005] A first aspect of this application provides an elastic material composition comprising, by weight, the following raw material components:

[0006] 60-90 parts of the first resin

[0007] The second resin is 1 to 30 parts, and

[0008] Elastic additives: 10 to 40 parts;

[0009] The first resin includes one or more of acrylonitrile-butadiene-styrene terpolymer (ABS), styrene-acrylonitrile copolymer (AS), and styrene-acrylonitrile-acrylic rubber terpolymer (ASA);

[0010] The second resin includes one or more of polycarbonate (PC), silicone copolymer polycarbonate (silicone copolymer PC), polybutylene terephthalate (PBT), polyethylene terephthalate (PET), and polyglycerol methacrylate (PMMA).

[0011] The above-mentioned elastic material composition, by using specific types of first and second resins to synergistically enhance each other, can effectively improve the compatibility of the composition with rigid plastic parts, and has high bonding strength after coating, making it difficult to peel off. On this basis, a certain amount of elastic additives by weight are added to ensure elastic performance.

[0012] In addition, the above-mentioned elastic material composition can be co-extruded or injection molded with plastic parts to achieve coating, the preparation process is simple, and it is suitable for the production of plastic parts with complex structures, resulting in high production efficiency.

[0013] In one embodiment, the elastic additive includes one or more of acrylonitrile-styrene-butadiene copolymer (ABS) high-resin powder, methyl methacrylate-butadiene-styrene terpolymer (MBS), silicone-based toughening agents, and acrylate toughening agents. By using specific types of elastic additives, the strength and hardness of the first and second resins can be further adjusted to obtain better elasticity.

[0014] Furthermore, by properly controlling the weight proportions of the first resin, the second resin, or the elastic additive, better strength and lower hardness can be achieved, thereby improving elastic properties.

[0015] In one embodiment, the elastic material composition comprises, by weight, the following raw material components:

[0016] 60-90 parts of the first resin

[0017] The second resin is 1 to 30 parts, and

[0018] 20 to 40 parts of elastic additive.

[0019] In one embodiment, the elastic material composition comprises, by weight, the following raw material components:

[0020] 75-85 parts of the first resin

[0021] 15 to 25 parts of the second resin, and

[0022] 30 to 40 parts of elastic additive.

[0023] In one embodiment, the raw material component further includes 0.2 to 10 parts by weight of an antioxidant.

[0024] In one embodiment, the antioxidant includes a first antioxidant and a second antioxidant; the first antioxidant includes a hindered phenolic antioxidant; and the second antioxidant includes a phosphite antioxidant. The combination of the first and second antioxidants reduces the aging reaction of the first and second resins during processing, thereby improving the performance stability of the composition.

[0025] In one embodiment, the raw material component further includes 0.1 to 5 parts by weight of lubricant.

[0026] In one embodiment, the lubricant includes one or more of polyol esters, silicones, and stearic acid lubricants. By using specific types of lubricants, the viscosity of the components in the system can be reduced during the melt blending process, and the system is less likely to stick to the mold during subsequent processing and molding.

[0027] A second aspect of this application provides a method for preparing the elastic material composition described in the first aspect, comprising the following steps:

[0028] Mix the various raw material components to prepare a premix;

[0029] The premix is ​​melt-extruded to prepare the elastic material composition.

[0030] A third aspect of this application provides a plastic part, including a part substrate and an elastic layer covering the surface of the part substrate, the elastic layer comprising the elastic material composition described in the first aspect; optionally, the material of the part substrate comprises polycarbonate or a composite material thereof. Detailed Implementation

[0031] The following detailed description, in conjunction with specific embodiments, further illustrates the elastic material composition, its preparation method, and the plastic parts thereof. This application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this application.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0033] In this article, "one or more" refers to any one, two or more of the listed items.

[0034] In this application, terms such as "first aspect," "second aspect," and "third aspect" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or quantity, nor should they be construed as implicitly indicating the importance or quantity of the indicated technical features. Moreover, terms such as "first," "second," and "third" serve only as a non-exhaustive enumeration and should be understood not to constitute a closed limitation on quantity.

[0035] In this application, the technical features described in an open-ended manner include both closed technical solutions consisting of the listed features and open technical solutions that include the listed features.

[0036] In this application, numerical ranges are referred to as continuous unless otherwise specified, and include the minimum and maximum values ​​of the range, as well as every value between the minimum and maximum values. Furthermore, when the range refers to integers, it includes every integer between the minimum and maximum values ​​of the range. Additionally, when multiple ranges are provided to describe a feature or characteristic, the ranges may be merged. In other words, unless otherwise specified, all ranges disclosed herein should be understood to include any and all subranges to which they are incorporated.

[0037] Unless otherwise specified, the percentage content mentioned in this application refers to mass percentage for solid-liquid mixtures and solid-phase-solid mixtures, and volume percentage for liquid-phase-liquid mixtures.

[0038] Unless otherwise specified, all percentage concentrations mentioned in this application refer to the final concentration. The final concentration refers to the proportion of the added component in the system after the addition of that component.

[0039] Unless otherwise specified, the temperature parameters in this application may be either constant temperature processing or processing within a certain temperature range. The constant temperature processing allows for temperature fluctuations within the precision range controlled by the instrument.

[0040] In this application, room temperature generally refers to 4℃~30℃, and preferably 20±5℃.

[0041] Traditional methods of using soft materials such as foam or thermoplastic elastomers (TPE) to absorb vibrations in rigid plastic parts have several drawbacks: they are not suitable for parts with complex structures, or the bonding strength to the parts is low and the materials are prone to falling off.

[0042] Based on this, this application achieves good compatibility with rigid plastic parts such as polycarbonate (PC) by using specific types of first and second resins synergistically, along with a certain amount of elastic additives by weight. This results in high bonding strength after coating, while also exhibiting low hardness, high impact strength, and good elasticity. Furthermore, the aforementioned elastic material composition can be co-extruded or injection molded with plastic parts to achieve coating, simplifying the preparation process and making it suitable for manufacturing complex plastic parts with high production efficiency.

[0043] Some examples of this application provide an elastic material composition comprising, by weight, the following raw material components:

[0044] 60-90 parts of the first resin

[0045] The second resin is 1 to 30 parts, and

[0046] Elastic additives: 10 to 40 parts;

[0047] The first resin includes one or more of acrylonitrile-butadiene-styrene terpolymer (ABS), styrene-acrylonitrile copolymer (AS), and styrene-acrylonitrile-acrylate rubber terpolymer (ASA); the second resin includes one or more of polycarbonate (PC), silicone copolymer polycarbonate (silicone copolymer PC), polybutylene terephthalate (PBT), polyethylene terephthalate (PET), and polyglycerol methacrylate (PMMA).

[0048] Without limitation, the weight parts of the first resin include, but are not limited to: 60 parts, 65 parts, 70 parts, 75 parts, 80 parts, 85 parts, 90 parts or any two of the foregoing.

[0049] Without limitation, the weight parts of the second resin include, but are not limited to: 1 part, 5 parts, 10 parts, 15 parts, 20 parts, 25 parts, 30 parts, or any two of the foregoing.

[0050] Without limitation, the parts by weight of the elastic additive include, but are not limited to: 10 parts, 15 parts, 20 parts, 25 parts, 30 parts, 35 parts, 40 parts, or any range between the two mentioned above.

[0051] In some examples, the first resin comprises acrylonitrile-butadiene-styrene terpolymer (ABS), and the second resin comprises silicone copolymer polycarbonate (silicone copolymer PC). This achieves better strength while ensuring lower hardness.

[0052] In some examples, the elastic additives include one or more of acrylonitrile-styrene-butadiene copolymer (ABS) high-resin powder, methyl methacrylate-butadiene-styrene terpolymer (MBS), silicone-based toughening agents, and acrylate toughening agents. By employing specific types of elastic additives, the strength and hardness of the first and second resins can be further adjusted to obtain better elasticity. Understandably, the resin content in the ABS high-resin powder is typically 50% to 70%.

[0053] In some of these examples, the elastic material composition comprises, by weight, the following raw material components:

[0054] 60-90 parts of the first resin

[0055] The second resin is 1 to 30 parts, and

[0056] 20 to 40 parts of elastic additive.

[0057] By properly controlling the weight of elastic additives, better strength and lower hardness can be achieved, thus improving elasticity.

[0058] In some of these examples, the elastic material composition comprises, by weight, the following raw material components:

[0059] 75-85 parts of the first resin

[0060] 15 to 25 parts of the second resin, and

[0061] 30 to 40 parts of elastic additive.

[0062] By further rationally controlling the weight proportions of the first resin, the second resin, and the elastic additives, better strength and lower hardness can be achieved, thus improving elasticity.

[0063] In some of these examples, the raw material component further includes 0.2 to 10 parts by weight of an antioxidant. Without limitation, the parts by weight of the antioxidant include, but are not limited to: 0.2 parts, 0.4 parts, 0.5 parts, 0.6 parts, 0.9 parts, 1 part, 1.2 parts, 1.5 parts, 2 parts, 2.5 parts, 3 parts, 3.5 parts, 4 parts, 4.5 parts, 5 parts, 7 parts, 10 parts, or any range between the foregoing.

[0064] In some examples, the antioxidant comprises a first antioxidant and a second antioxidant; the first antioxidant comprises a hindered phenolic antioxidant; and the second antioxidant comprises a phosphite antioxidant. The combination of the first and second antioxidants reduces the aging reaction of the first and second resins during processing, improving the performance stability of the composition. Further, the mass ratio of the first antioxidant to the second antioxidant is (0.1~5):(0.1~5). Without limitation, the first antioxidant comprises one or more hindered phenolic antioxidants such as 1010, 1076, and 245; and the second antioxidant comprises one or more phosphites such as 168 and PEP36.

[0065] In some of these examples, the raw material component further includes 0.1 to 5 parts by weight of lubricant. Without limitation, the parts by weight of lubricant include, but are not limited to: 0.1, 0.5, 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, or any range between the foregoing.

[0066] In some examples, the lubricant includes one or more of polyol esters, silicones, and stearic acids. By using specific types of lubricants, the viscosity of the components in the system can be reduced during the melt blending process, and the system is less likely to stick to the mold during subsequent processing and molding.

[0067] In some of these examples, the elastic material composition has at least one of the following characteristics:

[0068] (1) ISO notched impact strength is 30 kJ / m 2 above;

[0069] (2) Surface hardness is less than grade B;

[0070] (3) The covering cannot be peeled off before the object is torn.

[0071] Other examples of this application provide methods for preparing the elastic material compositions described above, comprising the following steps:

[0072] Mix the various raw material components to prepare a premix;

[0073] The premix is ​​melt-extruded to prepare the elastic material composition.

[0074] In some of these examples, the mixing conditions include: stirring at 500 rpm to 1500 rpm for 1 min to 10 min, then stirring at 100 rpm to 300 rpm for 1 min to 5 min, and then discharging at 100 rpm to 200 rpm.

[0075] In some of these examples, the conditions for melt extrusion include: an extrusion speed of 100 rpm to 500 rpm and a temperature control in each zone within the range of 150°C to 250°C.

[0076] Other examples of this application provide a plastic part, including a part substrate and an elastic layer covering the surface of the part substrate, the elastic layer comprising the elastic material composition described in the first aspect. Further, the material of the part substrate comprises polycarbonate or a composite thereof. The above-described elastic material composition is particularly suitable for part substrates made of polycarbonate or a composite thereof, exhibiting strong adhesion and resistance to peeling.

[0077] For experimental parameters not specified in the following specific embodiments, please refer to the guidelines given in this application document first, or refer to experimental manuals or other experimental methods known in the art, or refer to the experimental conditions recommended by the manufacturer.

[0078] The raw materials and reagents used in the following specific embodiments can be obtained commercially or prepared by those skilled in the art using known methods. The sources of some of the raw materials in the embodiments are as follows:

[0079] ABS resin: Chi Mei, ABS 757 resin;

[0080] PET resin: Wankai New Materials;

[0081] ABS high-polymer powder: Kumho Chemical Co., Ltd., South Korea;

[0082] Antioxidant 1010, Antioxidant 168: Sanfeng Chemical;

[0083] Lubricant EBS: Indonesia Chaoyang Chemical.

[0084] Example 1

[0085] This embodiment describes a highly elastic material, and its raw material composition, by mass parts, is as follows:

[0086] 60 parts ABS resin, 10 parts PET resin, 20 parts ABS high-adhesion powder, 0.5 parts antioxidant 1010, 0.4 parts antioxidant 168, and 2 parts lubricant EBS.

[0087] The preparation method of the above-mentioned highly elastic material is as follows:

[0088] (1) According to the raw material composition, ABS resin, PET resin, ABS high rubber powder, antioxidant 1010, antioxidant 168 and lubricant EBS are added to a high-speed mixer in sequence, stirred at 500 rpm for 5 min, then stirred at 100 rpm for 2 min, and then discharged at 200 rpm to obtain premixed material.

[0089] (2) The premixed material in step (1) is added through the main feed port of the extruder. The main speed of the extruder is 200 rpm, and the temperature of each zone is controlled within the range of 150℃~210℃. The material is melt-blended, cooled and pelletized through a twin-screw extruder to obtain ABS high elasticity composite material.

[0090] Examples 2-5 are similar to Example 1 in terms of raw material composition and preparation method, with the main difference being that the mass fraction of each raw material is controlled differently.

[0091] Examples 6-9 are similar to Example 1 in terms of raw material composition and preparation method, with the main difference being that the types of raw materials are different.

[0092] Comparative Example 1 is similar to Example 1 in terms of raw material composition and preparation method, with the main difference being that PET resin was not used.

[0093] Comparative Example 2 is similar to Example 1 in terms of raw material composition and preparation method, with the main difference being that ABS high-adhesion powder was not used.

[0094] Comparative Example 3 is similar to Example 1 in terms of raw material composition and preparation method, with the main difference being that PA6 is used instead of ABS resin.

[0095] The compatibility of each embodiment and comparative example is summarized in Table 1 below (parts by weight).

[0096] Table 1

[0097]

[0098] Test example:

[0099] Test method:

[0100] (1) ISO notched impact strength: determined according to ISO 180 standard;

[0101] (2) Surface hardness: Measured according to the Rockwell hardness standard;

[0102] (3) Peel resistance: The high elastic material of each embodiment and the comparative example are co-extruded with PC material to prepare PC plastic samples with the surface covered with high elastic material. Then the samples are manually peeled and the tearing of high elastic material and PC material is observed to determine the peel resistance.

[0103] The test results are shown in Table 2 below:

[0104] Table 2

[0105]

[0106] A comparison between Examples 1-9 and Comparative Examples 1 and 3 shows that, through the rational formulation of the first and second resins, this application achieves excellent overall material performance, high ISO impact strength, low Rockwell hardness, falling within the range of soft rubber, and exhibiting high adhesion strength to PC after co-extrusion, preventing peeling before tearing. A comparison between Examples 1-9 and Comparative Example 2 shows that, without the addition of elastic additives, Comparative Example 2 exhibits a significant decrease in impact strength and a significant increase in hardness.

[0107] Furthermore, a comparison between Examples 1 and 5 shows that properly controlling the amount of elastic additive can yield better impact strength and softness. A comparison between Examples 1-4 shows that properly controlling the weight ratio of each component can yield better impact strength and softness. A comparison between Examples 1 and Examples 6-9 shows that using suitable types of first and second resins can yield better impact strength.

[0108] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0109] The embodiments described above are merely illustrative of several implementation methods of this application, intended to facilitate a detailed understanding of the technical solutions of this application, but should not be construed as limiting the scope of protection of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of protection of this application. It should be understood that technical solutions obtained by those skilled in the art based on the technical solutions provided in this application through logical analysis, reasoning, or limited experimentation are all within the scope of protection of the appended claims. Therefore, the scope of protection of this patent application should be determined by the content of the appended claims, and the specification can be used to interpret the content of the claims.

Claims

1. An elastic material composition, characterized in that, By weight, it comprises the following raw material components: 60-90 parts of the first resin The second resin is 1 to 30 parts, and Elastic additives: 10 to 40 parts; The first resin includes one or more of acrylonitrile-butadiene-styrene terpolymer, styrene-acrylonitrile copolymer, and styrene-acrylonitrile-acrylic rubber terpolymer; The second resin includes one or more of polycarbonate, silicone copolymer polycarbonate, polybutylene terephthalate, polyethylene terephthalate, and polyglycerol methacrylate.

2. The elastic material composition according to claim 1, characterized in that, The elastic additives include one or more of the following: acrylonitrile-styrene-butadiene copolymer high-rubber powder, methyl methacrylate-butadiene-styrene terpolymer, silicone-based toughening agents, and acrylate toughening agents.

3. The elastic material composition according to claim 1 or 2, characterized in that, By weight, it comprises the following raw material components: 60-90 parts of the first resin The second resin is 1 to 30 parts, and 20 to 40 parts of elastic additive.

4. The elastic material composition according to claim 1 or 2, characterized in that, By weight, it comprises the following raw material components: 75-85 parts of the first resin 15 to 25 parts of the second resin, and 30 to 40 parts of elastic additive.

5. The elastic material composition according to claim 1 or 2, characterized in that, The raw material components also include 0.2 to 10 parts of antioxidant by weight.

6. The elastic material composition according to claim 5, characterized in that, The antioxidant includes a first antioxidant and a second antioxidant; the first antioxidant includes hindered phenolic antioxidants; and the second antioxidant includes phosphite antioxidants.

7. The elastic material composition according to claim 1 or 2, characterized in that, The raw material components also include 0.1 to 5 parts of lubricant by weight.

8. The elastic material composition according to claim 7, characterized in that, The lubricant includes one or more of polyol esters, silicones, and stearic acid lubricants.

9. A method for preparing the elastic material composition according to any one of claims 1 to 8, characterized in that, Includes the following steps: Mix the various raw material components to prepare a premix; The premix is ​​melt-extruded to prepare the elastic material composition.

10. A plastic part, characterized in that, It includes a substrate and an elastic layer covering the surface of the substrate, wherein the elastic layer comprises the elastic material composition according to any one of claims 1 to 8; Optionally, the material of the substrate of the part includes polycarbonate or a composite thereof.

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