Tear-resistant heavy-duty truck engine mount rubber material and its preparation method

Abstract

This application relates to the field of rubber material preparation technology, and in particular to a tear-resistant heavy-duty truck engine suspension rubber material and its preparation method. The tear-resistant heavy-duty truck engine suspension rubber material of this application, by weight, comprises the following raw materials: 75-90 parts natural rubber, 15-25 parts styrene-butadiene rubber, 8-20 parts reinforcing fiber, 12-25 parts carbon black, 3-8 parts activator, 1.5-4 parts antioxidant, 2-4 parts microcrystalline wax, 1.5-3.5 parts accelerator, 1-3 parts tackifier, 1-3 parts dispersant, 0.5-1.5 parts sulfur, and 0.5-1.5 parts silane coupling agent. The rubber material provided by this application has superior tear resistance, is suitable for high-load environments such as heavy-duty trucks, and also has good aging resistance, ensuring a long service life. Furthermore, the preparation method is simple, inexpensive, and easily achievable for large-scale production.

Description

Technical Field

[0001] This invention relates to the field of rubber material preparation technology, and in particular to a tear-resistant heavy-duty truck engine suspension rubber material and its preparation method. Background Technology

[0002] Heavy-duty trucks frequently operate in complex road conditions, subjecting their engines to significant vibrations and impacts. This not only affects vehicle stability and ride comfort but can also damage the engine mounting system. Currently available traditional rubber materials are prone to aging, wear, and tearing under prolonged exposure to high-intensity vibrations, thus reducing the overall vehicle's safety performance and lifespan. Therefore, developing a new rubber material with superior tear resistance is crucial for improving the reliability of heavy-duty truck engine mounting systems. Summary of the Invention

[0003] Therefore, it is necessary to provide a tear-resistant heavy-duty truck engine mount rubber material and its preparation method. This application, through optimized material formulation and preparation process, produces a rubber material that not only maintains good elasticity and shock absorption but also significantly improves tear resistance, effectively extending its service life.

[0004] A first aspect of this application provides a tear-resistant heavy-duty truck engine mount rubber material, comprising, by weight, the following raw materials:

[0005] 75-90 parts natural rubber

[0006] 15-25 parts of styrene-butadiene rubber

[0007] 8 to 20 parts reinforcing fiber

[0008] 12 to 25 parts carbon black

[0009] Activator 3 to 8 parts

[0010] Anti-aging agent 1.5 to 4 parts

[0011] 2 to 4 parts microcrystalline wax

[0012] Accelerator 1.5 parts to 3.5 parts

[0013] 1 to 3 parts of tackifier

[0014] 1 to 3 parts of dispersant

[0015] Sulfur 0.5 to 1.5 parts

[0016] 0.5 to 1.5 parts of silane coupling agent.

[0017] In one embodiment, the tear-resistant heavy-duty truck engine mount rubber material comprises, by weight, the following raw materials:

[0018] 80-90 parts natural rubber

[0019] 15-25 parts of styrene-butadiene rubber

[0020] 10 to 20 parts reinforcing fiber

[0021] 15 to 25 parts carbon black

[0022] 3 to 5 parts activator

[0023] Anti-aging agent 1.5 to 3 parts

[0024] 3-4 parts microcrystalline wax

[0025] Accelerator 2 to 3 parts

[0026] 1 to 2 parts of tackifier

[0027] 1 to 2 parts of dispersant

[0028] Sulfur 0.5 to 1.5 parts

[0029] 0.5 to 1.5 parts of silane coupling agent.

[0030] In one embodiment, the mass ratio of natural rubber to styrene-butadiene rubber is 3.2 to 6:1.

[0031] In one embodiment, the reinforcing fiber satisfies at least one of the following conditions (1) to (4):

[0032] (1) The reinforcing fiber is a polyarylate fiber;

[0033] (2) The reinforcing fiber is a liquid crystal polymer fiber;

[0034] (3) The length of the reinforcing fiber is 0.2~1mm; the density is 1.20 g / cm³. 3 ~1.70g / cm 3 The moisture absorption rate is 0.02%~0.06%;

[0035] (4) The reinforcing fiber includes at least one of Sumitomo E5204L, Sumitomo E4008, Celanese VECTRA A950, and Golden Vicryst R830.

[0036] In one embodiment, the activator includes at least one of zinc oxide and magnesium oxide; the antioxidant includes at least one of antioxidant 4010NA and antioxidant RD.

[0037] In one embodiment, the accelerator is obtained by mixing CBS and DTDM; the mass ratio of CBS to DTDM is 1~1.5:1. The tackifier includes at least one of coumarone resin and modified phenolic resin.

[0038] In one embodiment, the dispersant includes at least one of ethylene bis-stearamide and dispersant KT-8A; the silane coupling agent includes at least one of A-1120 and QX-618.

[0039] The second aspect of this application provides a method for preparing the tear-resistant heavy-duty truck engine mount rubber material described in the first aspect above, comprising the following steps: according to parts by mass,

[0040] S1: Mix and soak the reinforcing fiber with a silane coupling agent, and then irradiate with ultraviolet light to obtain pretreated reinforcing fiber for later use.

[0041] S2: Natural rubber and styrene-butadiene rubber are mixed and mixed to obtain raw rubber material. Then, pretreated reinforcing fibers are added, and after heating and mixing, carbon black, activator, antioxidant, microcrystalline wax, tackifier and dispersant are added. The mixture is then kept at a high temperature and mixed to obtain intermediate compound.

[0042] S3: Cool the intermediate compound to room temperature, let it stand, add it to a mixer, along with sulfur and accelerator, and mix to obtain the compound.

[0043] S4: Inject the compounded rubber into a mold to obtain a tear-resistant heavy-duty truck engine mounting rubber material.

[0044] In one embodiment, in S1, the soaking time is 10 min to 20 min, and the ultraviolet irradiation time is 5 min to 10 min; in S2, the mixing and compounding time is 30 s to 50 s; heating and mixing refers to heating to 120℃ to 140℃ and mixing for 15 s to 30 s; heat preservation and intensive mixing refers to mixing the rubber at 120℃ to 140℃ for 10 min to 18 min.

[0045] In one embodiment, in S3, the settling time is 6h~12h; the mixing temperature is 95℃~115℃, and the time is 2min~4min; in S4, the injection molding involves injecting the compounded rubber into a molding die at 150℃~170℃ using an injection molding device, maintaining a pressure of 8MPa~10MPa, and vulcanizing for 5min~10min; or injecting the compounded rubber into a molding mold at 130℃~150℃ using an injection molding device, maintaining a pressure of 8MPa~10MPa, and vulcanizing for 6min~12min.

[0046] This application utilizes the synergistic effects of specific raw materials by limiting their proportions and weights within a defined range. Specifically: natural rubber and styrene-butadiene rubber are mixed to obtain raw rubber compound, which is then mixed with other components. This avoids uneven rubber distribution leading to localized differences in mechanical properties and tearing points. Carbon black acts as a filler and reinforcement in the rubber, improving its tensile and tear strength, while also enhancing its abrasion and weather resistance. Activators promote the interaction between rubber and fillers (such as carbon black), improving filler dispersibility and rubber crosslinking density. Antioxidants effectively inhibit oxidation, thermal aging, and photoaging reactions during processing, storage, and use, extending the service life of rubber products. Microcrystalline wax migrates to the surface of rubber products, forming a protective film to prevent... Products are susceptible to damage from environmental factors such as ozone and ultraviolet radiation; accelerators can accelerate the vulcanization process of rubber, improve vulcanization efficiency and the performance of vulcanized rubber; tackifiers can improve the adhesion between rubber and other materials (such as fibers, metals, etc.), and enhance the adhesive properties of rubber products; dispersants can improve the dispersibility of fillers in rubber, improve the utilization rate of fillers and the crosslinking density of rubber; sulfur is the main crosslinking agent in the rubber vulcanization process, which can react chemically with rubber molecular chains to form a crosslinked network structure; silane coupling agents can improve the interfacial bonding force between fibers and rubber and inorganic fillers; the added reinforcing fibers form a network structure similar to the crosslinking of rubber molecules in a uniformly mixed state in the rubber, which can effectively prevent the propagation of rubber microcracks, and thus further improve the tear strength of rubber materials.

[0047] The rubber material prepared in this application has superior tear resistance, making it suitable for high-load environments such as heavy trucks. It also has good aging resistance, ensuring a long service life. Furthermore, the preparation method is simple, easy to implement, low in cost, and easy to achieve large-scale production. Detailed Implementation

[0048] A detailed reference is now provided to embodiments of this application, one or more of which are described below. Each embodiment is provided for explanation and not for limitation. In fact, it will be apparent to those skilled in the art that various modifications and variations can be made to this application without departing from its scope or spirit. For example, features described or illustrated as part of one embodiment may be used in another embodiment to produce further embodiments.

[0049] Therefore, this application is intended to cover such modifications and variations falling within the scope of the appended claims and their equivalents. Other objects, features, and aspects of this application are disclosed in or will be apparent from the following detailed description. It will be understood by those skilled in the art that this discussion is merely a description of exemplary embodiments and is not intended to limit the broader aspects of this application.

[0050] 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.

[0051] 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.

[0052] In this article, when referring to units for data ranges, if the unit is only followed by the right endpoint, it means that the units for the left and right endpoints are the same. For example, 100~150 s means that the units for the left endpoint "100" and the right endpoint "150" are both seconds (s).

[0053] Unless otherwise specified, all embodiments and optional embodiments of this application can be combined to form new technical solutions.

[0054] Unless otherwise specified, all technical features and optional technical features of this application may be combined to form new technical solutions.

[0055] Unless otherwise specified, all steps in this application may be performed sequentially or randomly, preferably sequentially. For example, the method includes steps (a) and (b), indicating that the method may include steps (a) and (b) performed sequentially, or it may include steps (b) and (a) performed sequentially. For example, the mention that the method may also include step (c) indicates that step (c) may be added to the method in any order; for example, the method may include steps (a), (b), and (c), or it may include steps (a), (c), and (b), or it may include steps (c), (a), and (b), etc.

[0056] Unless otherwise specified, the terms "comprising" and "including" as used in this application can be open-ended or closed-ended. For example, "comprising" and "including" can mean that other components not listed may also be included, or that only the listed components may be included.

[0057] Unless otherwise specified, the term "or" is inclusive in this application. For example, the phrase "A or B" means "A, B, or both A and B". More specifically, the condition "A or B" is satisfied by any of the following conditions: A is true (or exists) and B is false (or does not exist); A is false (or does not exist) and B is true (or exists); or both A and B are true (or exist).

[0058] In view of the problems of aging, wear and tear of heavy truck engine mount rubber materials under high-intensity vibration in traditional technology, this application proposes a tear-resistant heavy truck engine mount rubber material to solve the above-mentioned technical problems of traditional heavy truck engine mount rubber materials.

[0059] The first aspect of this application provides a tear-resistant heavy-duty truck engine mount rubber material, comprising, by weight, the following raw materials:

[0060] 75-90 parts natural rubber

[0061] 15-25 parts of styrene-butadiene rubber

[0062] 8 to 20 parts reinforcing fiber

[0063] 12 to 25 parts carbon black

[0064] Activator 3 to 8 parts

[0065] Anti-aging agent 1.5 to 4 parts

[0066] 2 to 4 parts microcrystalline wax

[0067] Accelerator 1.5 parts to 3.5 parts

[0068] 1 to 3 parts of tackifier

[0069] 1 to 3 parts of dispersant

[0070] Sulfur 0.5 to 1.5 parts

[0071] 0.5 to 1.5 parts of silane coupling agent.

[0072] In some embodiments, the tear-resistant heavy-duty truck engine mount rubber material comprises, by weight, the following raw materials:

[0073] 80-90 parts natural rubber

[0074] 15-25 parts of styrene-butadiene rubber

[0075] 10 to 20 parts reinforcing fiber

[0076] 15 to 25 parts carbon black

[0077] 3 to 5 parts activator

[0078] Anti-aging agent 1.5 to 3 parts

[0079] 3-4 parts microcrystalline wax

[0080] Accelerator 2 to 3 parts

[0081] 1 to 2 parts of tackifier

[0082] 1 to 2 parts of dispersant

[0083] Sulfur 0.5 to 1.5 parts

[0084] 0.5 to 1.5 parts of silane coupling agent.

[0085] Preferably, the tear-resistant heavy-duty truck engine mount rubber material comprises, by weight, the following raw materials: 90 parts natural rubber, 15 parts styrene-butadiene rubber, 20 parts reinforcing fiber, 15 parts carbon black, 5 parts activator, 3 parts antioxidant, 3 parts microcrystalline wax, 3 parts accelerator, 1 part tackifier, 2 parts dispersant, 1.5 parts sulfur, and 1.3 parts silane coupling agent.

[0086] This application utilizes the synergistic effects of specific raw materials by limiting their proportions and weights within a defined range. Specifically: natural rubber and styrene-butadiene rubber are mixed to obtain raw rubber compound, which is then mixed with other components. This avoids uneven rubber distribution leading to localized differences in mechanical properties and tearing points. Carbon black acts as a filler and reinforcement in the rubber, improving its tensile and tear strength, while also enhancing its abrasion and weather resistance. Activators promote the interaction between rubber and fillers (such as carbon black), improving filler dispersibility and rubber crosslinking density. Antioxidants effectively inhibit oxidation, thermal aging, and photoaging reactions during processing, storage, and use, extending the service life of rubber products. Microcrystalline wax migrates to the surface of rubber products, forming a protective film to prevent... Products are susceptible to damage from environmental factors such as ozone and ultraviolet radiation; accelerators can accelerate the vulcanization process of rubber, improve vulcanization efficiency and the performance of vulcanized rubber; tackifiers can improve the adhesion between rubber and other materials (such as fibers, metals, etc.), enhancing the adhesive properties of rubber products; dispersants can improve the dispersibility of fillers in rubber, increasing the utilization rate of fillers and the crosslinking density of rubber; sulfur is the main crosslinking agent in the rubber vulcanization process, capable of chemically reacting with rubber molecular chains to form a crosslinked network structure; silane coupling agents can improve the interfacial bonding force between fibers and rubber, and inorganic fillers; the added reinforcing fibers, in a uniformly mixed state in the rubber, form a network structure similar to the crosslinking of rubber molecules, which can effectively prevent the propagation of rubber microcracks, thereby further improving the tear strength of the rubber material. The rubber material prepared in this application has superior tear resistance, suitable for high-load environments such as heavy-duty trucks, and also has good aging resistance, ensuring a long service life. Furthermore, the preparation method is simple, inexpensive, and easy to implement for large-scale production.

[0087] In some embodiments, the mass ratio of natural rubber to styrene-butadiene rubber is 3.2 to 6:1. This includes, but is not limited to, 3.2:1, 4:1, 4.25:1, 4.5:1, 5:1, and 6:1. This application does not limit the specific parameters of natural rubber and styrene-butadiene rubber; any limitation that achieves the effects of this application is within the scope of protection of this application.

[0088] In some embodiments, the reinforcing fibers satisfy at least one of the following conditions (1) to (4):

[0089] (1) The reinforcing fiber is a polyarylate fiber;

[0090] (2) The reinforcing fiber is liquid crystal polymer fiber (LCP fiber).

[0091] (3) The length of the reinforcing fiber is 0.2 mm to 1 mm, including but not limited to 0.2 mm, 0.4 mm, 0.6 mm, 0.8 mm, and 1 mm; the density is 1.20 g / cm³. 3~1.70g / cm 3 The moisture absorption rate is 0.02%~0.06%;

[0092] (4) Reinforcing fibers include Sumitomo's , Sumitomo's At least one of Celanese's VECTRA A950 and Blonde's Vicryst R830.

[0093] In this application, LCP fiber belongs to aromatic polyester and is spun into filaments by melt extrusion of liquid crystal polymer. It has the characteristics of high tension, high elasticity and high strength, good cut resistance, high fatigue resistance, and is not easily damaged even under repeated stress. It also has very good vibration absorption characteristics and extremely low linear expansion rate.

[0094] It is understood that the tear resistance mechanism of the liquid crystal polymer fiber-reinforced rubber material in this application is as follows: when the rubber material is subjected to external force and tears, crack propagation leads to stress concentration. The addition of liquid crystal polymer fibers can effectively transfer stress from the rubber matrix to itself. Because liquid crystal polymer fibers have high strength and modulus, as well as good cut resistance and fatigue resistance, they can withstand greater loads, thereby delaying crack propagation and improving the overall tear resistance of the material. The addition of liquid crystal polymer fibers can change the crack path, transforming it from linear propagation to tortuous or branching propagation. This change in crack path means that more obstacles need to be overcome and more energy needs to be consumed during crack propagation, thus improving the material's tear resistance.

[0095] This application utilizes liquid crystal polymer fibers as a reinforcing material, which can effectively prevent the propagation of rubber microcracks and improve the tear strength of rubber materials.

[0096] In some embodiments, the activator includes at least one of zinc oxide and magnesium oxide; the antioxidant includes at least one of antioxidant 4010NA and antioxidant RD.

[0097] In some embodiments, the accelerator is obtained by mixing CBS (N-cyclohexyl-2-benzothiazole sulfenamide) and DTDM (4,4′-dithiodimorpholine); the mass ratio of CBS to DTDM is 1 to 1.5:1, including but not limited to 1:1, 1.1:1, 1.2:1, 1.3:1, 1.4:1, and 1.5:1. The tackifier includes at least one of coumarone resin and modified phenolic resin.

[0098] In some embodiments, the dispersant includes at least one of ethylene bis-stearamide and dispersant KT-8A; the silane coupling agent includes at least one of A-1120 and QX-618.

[0099] The second aspect of this application provides a method for preparing the tear-resistant heavy-duty truck engine mount rubber material described in the first aspect, comprising the following steps: according to parts by mass,

[0100] S1: Mix and soak the reinforcing fiber with a silane coupling agent, and then irradiate with ultraviolet light to obtain pretreated reinforcing fiber for later use.

[0101] S2: Natural rubber and styrene-butadiene rubber are mixed and mixed to obtain raw rubber material. Then, pretreated reinforcing fibers are added, and after heating and mixing, carbon black, activator, antioxidant, microcrystalline wax, tackifier and dispersant are added. The mixture is then kept at a high temperature and mixed to obtain intermediate compound.

[0102] S3: Cool the intermediate compound to room temperature, let it stand, add it to a mixer, along with sulfur and accelerator, and mix to obtain the compound.

[0103] S4: Inject the compounded rubber into a mold to obtain a tear-resistant heavy-duty truck engine mounting rubber material.

[0104] In some embodiments, in S1, the soaking time is 10 min to 20 min, including but not limited to 10 min, 12 min, 14 min, 16 min, 18 min, and 20 min; the ultraviolet irradiation time is 5 min to 10 min, including but not limited to 5 min, 6 min, 7 min, 8 min, 9 min, and 10 min; in S2, the mixing and compounding time is 30 s to 50 s, including but not limited to 30 s, 35 s, 40 s, 45 s, and 50 s; heated mixing refers to heating to 120°C. Mixing at ~140℃ for 15s~30s, wherein the temperature for heating and mixing includes but is not limited to 120℃, 125℃, 130℃, 135℃, and 140℃, and the time includes but is not limited to 15s, 20s, 25s, and 30s; heat preservation mixing refers to mixing rubber at 120℃~140℃ for 10min~18min; wherein the temperature for heat preservation mixing includes but is not limited to 120℃, 125℃, 130℃, 135℃, and 140℃, and the time includes but is not limited to 10min, 12min, 14min, 16min, and 18min.

[0105] In some embodiments, in step S3, the settling time is 6h to 12h, including but not limited to 6h, 7h, 8h, 9h, 10h, 11h, and 12h; the mixing temperature is 95℃ to 115℃, including but not limited to 95℃, 98℃, 100℃, 112℃, 114℃, and 115℃, and the mixing time is 2min to 4min, including but not limited to 2min, 2.5min, 3min, 3.5min, and 4min.

[0106] In some embodiments, in S4, injection molding involves injecting the compounded rubber into a molding die at 150°C to 170°C using an injection molding machine, maintaining a pressure of 8MPa to 10MPa, including but not limited to 8MPa, 9MPa, and 10MPa, and vulcanizing for 5 to 10 minutes, including but not limited to 5 minutes, 6 minutes, 7 minutes, 8 minutes, 9 minutes, and 10 minutes; the temperature of the molding die includes but is not limited to 150°C, 155°C, 160°C, 165°C, and 170°C. Alternatively, the compounded rubber is injected into a molding die at 130°C to 150°C using an injection molding machine, maintaining a pressure of 8MPa to 10MPa, and vulcanizing for 6 to 12 minutes, including but not limited to 6 minutes, 7 minutes, 8 minutes, 9 minutes, 10 minutes, 11 minutes, and 12 minutes; the temperature of the mold includes but is not limited to 130°C, 135°C, 140°C, 145°C, and 150°C, and the holding pressure includes but is not limited to 8MPa, 9MPa, and 10MPa.

[0107] The following are specific examples.

[0108] Example 1

[0109] The tear-resistant heavy-duty truck engine mount rubber material, by weight, includes the raw material components shown in Table 1. The reinforcing fiber is liquid crystal polymer fiber (LCP), purchased from Sumitomo Corporation, model E5204L; the average fiber length is 0.5 mm; the activator is zinc oxide; the antioxidant is antioxidant 4010NA; the accelerator is a mixture of CBS and DTDM at a mass ratio of 1:1; the tackifier is coumarone resin; the dispersant is ethylene bis-stearamide; and the silane coupling agent is A-1120.

[0110] The preparation method of tear-resistant heavy-duty truck engine mount rubber material is as follows:

[0111] S1: Pretreated reinforcing fiber

[0112] Liquid crystal polymer fiber (LCP) was uniformly immersed in silane coupling agent for 20 minutes. After immersion, it was removed and irradiated with ultraviolet light for 10 minutes to obtain pretreated reinforced fiber for later use.

[0113] S2: A Mixture

[0114] Natural rubber and styrene-butadiene rubber were added to a mixer and mixed for 30 seconds. Then, the reinforcing fibers pretreated in step S1 were added, the temperature was adjusted to 120°C, and the mixture was mixed for 30 seconds. Carbon black, activator, antioxidant, microcrystalline wax, tackifier, and dispersant were added, the temperature was maintained at 120°C, and the mixture was mixed for 15 minutes. The mixture was then discharged to obtain the intermediate compound.

[0115] S3: Two-stage mixing

[0116] After cooling the intermediate compound obtained in step S2 to room temperature and letting it stand for 12 hours, it is added to a mixer along with sulfur and accelerator. The temperature is set to 100℃ and the mixture is mixed for 4 minutes. After that, the rubber is discharged to form the compound.

[0117] S4: Vulcanization

[0118] The compound obtained in step S3 is injected into a molding die at 150°C using an injection molding machine, and the pressure is maintained at 8MPa for 8 minutes.

[0119] Example 2

[0120] The tear-resistant heavy-duty truck engine mount rubber material, by weight, includes the raw material components shown in Table 1. The reinforcing fiber is liquid crystal polymer fiber (LCP), purchased from Sumitomo Corporation, model E5204L; the average fiber length is 0.5 mm; the activator is zinc oxide; the antioxidant is antioxidant 4010NA; the accelerator is a mixture of CBS and DTDM at a mass ratio of 1:1; the tackifier is coumarone resin; the dispersant is ethylene bis-stearamide; and the silane coupling agent is A-1120.

[0121] The preparation method of tear-resistant heavy-duty truck engine mount rubber material is as follows:

[0122] S1: Pretreated reinforcing fiber

[0123] Liquid crystal polymer fiber (LCP) was uniformly immersed in silane coupling agent for 15 minutes. After immersion, it was removed and irradiated with ultraviolet light for 10 minutes to obtain pretreated reinforced fiber for later use.

[0124] S2: A Mixture

[0125] Natural rubber and styrene-butadiene rubber were added to a mixer and mixed for 30 seconds. Then, the reinforcing fibers pretreated in step S1 were added, the temperature was adjusted to 120°C, and the mixture was mixed for 30 seconds. Carbon black, activator, antioxidant, microcrystalline wax, tackifier, and dispersant were added, the temperature was maintained at 120°C, and the mixture was mixed for 12 minutes. The mixture was then discharged to obtain the intermediate compound.

[0126] S3: Two-stage mixing

[0127] After cooling the intermediate compound obtained in step S2 to room temperature and letting it stand for 12 hours, it is added to a mixer along with sulfur and accelerator. The temperature is set to 100℃ and the mixture is mixed for 3 minutes. After that, the rubber is discharged to form the compound.

[0128] S4: Vulcanization

[0129] The compound obtained in step S3 is injected into a molding die at 150°C using an injection molding machine, and the pressure is maintained at 8MPa for 8 minutes.

[0130] Example 3

[0131] The tear-resistant heavy-duty truck engine mount rubber material, by weight, includes the raw material components shown in Table 1. The reinforcing fiber is liquid crystal polymer fiber (LCP), purchased from Sumitomo Corporation, model E5204L; the average fiber length is 0.5 mm; the activator is zinc oxide; the antioxidant is antioxidant 4010NA; the accelerator is a mixture of CBS and DTDM at a mass ratio of 1:1; the tackifier is coumarone resin; the dispersant is ethylene bis-stearamide; and the silane coupling agent is A-1120.

[0132] The preparation method of the tear-resistant heavy-duty truck engine mount rubber material is the same as that in Example 1.

[0133] Example 4

[0134] The tear-resistant heavy-duty truck engine mount rubber material, by weight, includes the raw material components shown in Table 1. The reinforcing fiber is liquid crystal polymer fiber (LCP), purchased from Sumitomo Corporation, model E5204L; the average fiber length is 0.5 mm; the activator is zinc oxide; the antioxidant is antioxidant 4010NA; the accelerator is a mixture of CBS and DTDM at a mass ratio of 1:1; the tackifier is coumarone resin; the dispersant is ethylene bis-stearamide; and the silane coupling agent is A-1120.

[0135] The preparation method of the tear-resistant heavy-duty truck engine suspension rubber material is the same as in Example 2.

[0136] Example 5

[0137] The tear-resistant heavy-duty truck engine mount rubber material, by weight, includes the raw material components shown in Table 1. The reinforcing fiber is liquid crystal polymer fiber (LCP), purchased from Sumitomo Corporation, model E5204L; the average fiber length is 0.5 mm; the activator is zinc oxide; the antioxidant is antioxidant 4010NA; the accelerator is a mixture of CBS and DTDM at a mass ratio of 1:1; the tackifier is coumarone resin; the dispersant is ethylene bis-stearamide; and the silane coupling agent is A-1120.

[0138] The preparation method of the tear-resistant heavy-duty truck engine mount rubber material is the same as that in Example 1.

[0139] Example 6

[0140] The tear-resistant heavy-duty truck engine mount rubber material, by weight, includes the raw material components shown in Table 1. The reinforcing fiber is liquid crystal polymer fiber (LCP) with an average fiber length of 0.5 mm; the activator is zinc oxide; the antioxidant is antioxidant 4010NA; the accelerator is a mixture of CBS and DTDM at a mass ratio of 1:1; the tackifier is coumarone resin; the dispersant is ethylene bis-stearamide; and the silane coupling agent is A-1120.

[0141] The preparation method of the tear-resistant heavy-duty truck engine suspension rubber material is the same as in Example 2.

[0142] Example 7

[0143] The tear-resistant heavy-duty truck engine mount rubber material, by weight, includes the raw material components shown in Table 1. The reinforcing fiber is liquid crystal polymer fiber (LCP), purchased from Sumitomo Corporation, model E5204L; the average fiber length is 0.5 mm; the activator is zinc oxide; the antioxidant is antioxidant 4010NA; the accelerator is a mixture of CBS and DTDM at a mass ratio of 1:1; the tackifier is coumarone resin; the dispersant is ethylene bis-stearamide; and the silane coupling agent is A-1120.

[0144] The preparation method of tear-resistant heavy-duty truck engine mount rubber material is as follows:

[0145] S1: Pretreated reinforcing fiber

[0146] Liquid crystal polymer fiber (LCP) was uniformly immersed in silane coupling agent for 10 minutes. After immersion, it was removed and irradiated with ultraviolet light for 6 minutes to obtain pretreated reinforced fiber for later use.

[0147] S2: A Mixture

[0148] Natural rubber and styrene-butadiene rubber were added to a mixer and mixed for 40 seconds. Then, the reinforcing fibers pretreated in step S1 were added, the temperature was adjusted to 140°C, and the mixture was mixed for 20 seconds. Carbon black, activator, antioxidant, microcrystalline wax, tackifier, and dispersant were added, the temperature was maintained at 140°C, and the mixture was mixed for 10 minutes. The mixture was then discharged to obtain the intermediate compound.

[0149] S3: Two-stage mixing

[0150] After cooling the intermediate compound obtained in step S2 to room temperature and letting it stand for 8 hours, it is added to a mixer along with sulfur and accelerator. The temperature is set to 115℃ and the mixture is mixed for 2 minutes. After that, the rubber is discharged to form the compound.

[0151] S4: Vulcanization

[0152] The compound obtained in step S3 is injected into a molding die at 140°C using an injection molding machine, and the pressure is maintained at 10 MPa for 10 min.

[0153] Example 8

[0154] The tear-resistant heavy-duty truck engine mount rubber material, by weight, comprises the following raw material components: 75 parts natural rubber, 22 parts styrene-butadiene rubber, 15 parts reinforcing fiber, 12 parts carbon black, 3 parts activator, 1.5 parts antioxidant, 2 parts microcrystalline wax, 1.5 parts accelerator, 2 parts tackifier, 3 parts dispersant, 1 part sulfur, and 0.5 parts silane coupling agent. The reinforcing fiber is liquid crystal polymer fiber (LCP), purchased from Sumitomo Corporation, model E5204L; the average fiber length is 0.5 mm; the activator is magnesium oxide; the antioxidant is antioxidant RD; the accelerator is a mixture of CBS and DTDM at a mass ratio of 1:1; the tackifier is modified phenolic resin; the dispersant is KT-8A; and the silane coupling agent is QX-618.

[0155] The preparation method of tear-resistant heavy-duty truck engine mount rubber material is as follows:

[0156] S1: Pretreated reinforcing fiber

[0157] Liquid crystal polymer fiber (LCP) was uniformly immersed in silane coupling agent for 10 minutes. After immersion, it was removed and irradiated with ultraviolet light for 5 minutes to obtain pretreated reinforced fiber for later use.

[0158] S2: A Mixture

[0159] Add natural rubber and styrene-butadiene rubber to a mixer and mix for 50 seconds. Then add the reinforcing fibers pretreated in step S1, adjust the temperature to 120-140℃, and mix for 15 seconds. Add carbon black, activator, antioxidant, microcrystalline wax, tackifier, and dispersant, maintain the temperature at 130℃, and mix for 18 minutes. Discharge the mixture to obtain the intermediate compound.

[0160] S3: Two-stage mixing

[0161] After cooling the intermediate compound obtained in step S2 to room temperature and letting it stand for 6 hours, it is added to a mixer along with sulfur and accelerator. The temperature is set to 95°C and the mixture is mixed for 4 minutes. After that, the rubber is discharged to form the compound.

[0162] S4: Vulcanization

[0163] The compound obtained in step S3 is injected into a molding die at 170°C using an injection molding machine, and the pressure is maintained at 9 MPa for 10 minutes.

[0164] Example 9

[0165] The tear-resistant heavy-duty truck engine mount rubber material, by weight, comprises the following raw material components: 90 parts natural rubber, 15 parts styrene-butadiene rubber, 8 parts reinforcing fiber, 12 parts carbon black, 8 parts activator, 4 parts antioxidant, 4 parts microcrystalline wax, 3.5 parts accelerator, 3 parts tackifier, 1 part dispersant, 1.5 parts sulfur, and 1.5 parts silane coupling agent. The reinforcing fiber is liquid crystal polymer fiber (LCP), purchased from Sumitomo Corporation, model E5204L; the average fiber length is 0.5 mm; the activator is magnesium oxide; the antioxidant is antioxidant RD; the accelerator is a mixture of CBS and DTDM at a mass ratio of 1:1; the tackifier is modified phenolic resin; the dispersant is KT-8A; and the silane coupling agent is QX-618.

[0166] The preparation method of tear-resistant heavy-duty truck engine mount rubber material is as follows:

[0167] S1: Pretreated reinforcing fiber

[0168] Liquid crystal polymer fiber (LCP) was uniformly immersed in silane coupling agent for 20 minutes. After immersion, it was removed and irradiated with ultraviolet light for 10 minutes to obtain pretreated reinforced fiber for later use.

[0169] S2: A Mixture

[0170] Natural rubber and styrene-butadiene rubber were added to a mixer and mixed for 40 seconds. Then, the reinforcing fibers pretreated in step S1 were added, the temperature was adjusted to 140°C, and the mixture was mixed for 20 seconds. Carbon black, activator, antioxidant, microcrystalline wax, tackifier, and dispersant were added, the temperature was maintained at 140°C, and the mixture was mixed for 10 minutes. The mixture was then discharged to obtain the intermediate compound.

[0171] S3: Two-stage mixing

[0172] After cooling the intermediate compound obtained in step S2 to room temperature and letting it stand for 12 hours, it is added to a mixer along with sulfur and accelerator. The temperature is set to 115℃ and the mixture is mixed for 4 minutes. After that, the rubber is discharged to form the compound.

[0173] S4: Vulcanization

[0174] The compound obtained in step S3 is injected into a molding die at 130°C using an injection molding machine, and the pressure is maintained at 8 MPa for 12 minutes.

[0175] Comparative Example 1

[0176] The rubber material, by weight, includes the raw material components shown in Table 1. The reinforcing fiber is liquid crystal polymer fiber (LCP), purchased from Sumitomo Corporation, model E5204L; the average fiber length is 0.5 mm; the activator is zinc oxide; the antioxidant is antioxidant 4010NA; the accelerator is a mixture of CBS and DTDM at a mass ratio of 1:1; the tackifier is coumarone resin; the dispersant is ethylene bis-stearamide; and the silane coupling agent is A-1120.

[0177] The preparation method of the rubber material is as follows (according to the weight parts in Table 1):

[0178] S1 Mixing

[0179] Natural rubber and styrene-butadiene rubber were added to a mixer and mixed for 30 seconds. Then the temperature was adjusted to 120°C, and carbon black, activator, antioxidant, microcrystalline wax, tackifier, and dispersant were added. The temperature was maintained at 120°C, and the mixture was mixed for 15 minutes. The product was then discharged to obtain the intermediate compound.

[0180] S2 Second Stage Mixing

[0181] After cooling the intermediate compound obtained in step S1 to room temperature and letting it stand for 12 hours, it is added to an internal mixer, along with sulfur and accelerator. The temperature is set to 100℃ and the mixture is mixed for 4 minutes. After that, the rubber is discharged to produce the compound.

[0182] S3 vulcanization

[0183] The compound obtained in step S2 is injected into a molding die at 150°C using an injection molding machine, and the pressure is maintained at 8 MPa for 8 minutes.

[0184] Comparative Example 2

[0185] The rubber material, by weight, includes the raw material components shown in Table 1. The reinforcing fiber is liquid crystal polymer fiber (LCP), purchased from Sumitomo Corporation, model E5204L; the average fiber length is 0.5 mm; the activator is zinc oxide; the antioxidant is antioxidant 4010NA; the accelerator is a mixture of CBS and DTDM at a mass ratio of 1:1; the tackifier is coumarone resin; the dispersant is ethylene bis-stearamide; and the silane coupling agent is A-1120.

[0186] The preparation method of the rubber material is the same as that of Comparative Example 1.

[0187] Comparative Example 3

[0188] The rubber material, by weight, includes the raw material components shown in Table 1. The reinforcing fiber is liquid crystal polymer fiber (LCP), purchased from Sumitomo Corporation, model E5204L; the average fiber length is 0.5 mm; the activator is zinc oxide; the antioxidant is antioxidant 4010NA; the accelerator is a mixture of CBS and DTDM at a mass ratio of 1:1; the tackifier is coumarone resin; the dispersant is ethylene bis-stearamide; and the silane coupling agent is A-1120.

[0189] The preparation method of the rubber material is the same as that of Comparative Example 1.

[0190] Comparative Example 4

[0191] The rubber material, by weight, comprises the following raw material components: 90 parts natural rubber, 15 parts styrene-butadiene rubber, 20 parts reinforcing fiber, 15 parts carbon black, 5 parts activator, 3 parts antioxidant, 3 parts microcrystalline wax, 3 parts accelerator, 1 part tackifier, 2 parts dispersant, 1.5 parts sulfur, and 1.3 parts silane coupling agent. The reinforcing fiber is glass fiber; the activator is zinc oxide; the antioxidant is antioxidant 4010NA; the accelerator is a mixture of CBS and DTDM in a 1:1 mass ratio; the tackifier is coumarone resin; the dispersant is ethylene bis-stearamide; and the silane coupling agent is A-1120.

[0192] The preparation method of this rubber material is the same as in Example 1.

[0193] The raw materials and their proportions in Examples 1-7 and Comparative Examples 1-4 are shown in Table 1 below:

[0194] Table 1. Raw materials and weight parts for Examples 1-7 and Comparative Examples 1-4 (unit: parts)

[0195]

[0196] Test example:

[0197] The rubber materials prepared in Examples 1-7 and Comparative Examples 1-4 were subjected to mechanical property tests, and the test results are shown in Table 2 below. The Shore A hardness passed the test according to GB / T531.1-2008; the tear strength passed the test according to GB / T 529-2008 (right angle type); and the tensile strength passed the test according to GB / T528-2009.

[0198] Table 2 Test data of Examples 1-7 and Comparative Examples 1-4

[0199]

[0200] As shown in Table 2 above, compared with Example 1, Comparative Examples 1-3, without the addition of reinforcing fibers and silane coupling agents, exhibited significantly reduced tear strength and tensile strength. Comparative Example 4, although containing fibers, still showed lower tensile and tear strength than the embodiments of this application due to the different types of fibers compared to Example 1.

[0201] 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.

[0202] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A tear-resistant heavy-duty truck engine mount rubber material, characterized in that, By weight, the following raw materials are included in the preparation: 75-90 parts natural rubber 15-25 parts of styrene-butadiene rubber 8 to 20 parts reinforcing fiber 12 to 25 parts carbon black Activator 3 to 8 parts Anti-aging agent 1.5 to 4 parts 2 to 4 parts microcrystalline wax Accelerator 1.5 to 3.5 parts 1 to 3 parts of tackifier 1 to 3 parts of dispersant Sulfur 0.5 to 1.5 parts 0.5 to 1.5 parts of silane coupling agent; The reinforcing fiber is a liquid crystal polymer fiber.

2. The tear-resistant heavy-duty truck engine mount rubber material according to claim 1, characterized in that, The tear-resistant heavy-duty truck engine mount rubber material comprises, by weight, the following raw materials: 80-90 parts natural rubber 15-25 parts of styrene-butadiene rubber 10 to 20 parts reinforcing fiber 15 to 25 parts carbon black 3 to 5 parts activator Anti-aging agent 1.5 to 3 parts 3-4 parts microcrystalline wax Accelerator 2 to 3 parts 1 to 2 parts of tackifier 1 to 2 parts of dispersant Sulfur 0.5 to 1.5 parts 0.5 to 1.5 parts of silane coupling agent.

3. The tear-resistant heavy-duty truck engine mount rubber material according to any one of claims 1 to 2, characterized in that, The mass ratio of natural rubber to styrene-butadiene rubber is 3.2 to 6:

1.

4. The tear-resistant heavy-duty truck engine mount rubber material according to any one of claims 1 to 2, characterized in that, The reinforcing fiber satisfies at least one of the following conditions (1) to (2): (1) The length of the reinforcing fiber is 0.2~1mm; the density of the reinforcing fiber is 1.20 g / cm³. 3 ~1.70g / cm 3 The moisture absorption rate is 0.02%~0.06%; (2) The reinforcing fiber includes at least one of Sumitomo E5204L, Sumitomo E4008, Celanese VECTRA A950, and Golden Vicryst R830.

5. The tear-resistant heavy-duty truck engine mount rubber material according to any one of claims 1 to 2, characterized in that, The activator includes at least one of zinc oxide and magnesium oxide; the antioxidant includes at least one of antioxidant 4010NA and antioxidant RD.

6. The tear-resistant heavy-duty truck engine mount rubber material according to any one of claims 1 to 2, characterized in that, The accelerator is obtained by mixing CBS and DTDM; the mass ratio of CBS to DTDM is 1~1.5:1; the tackifier includes at least one of coumarone resin and modified phenolic resin.

7. The tear-resistant heavy-duty truck engine mount rubber material according to any one of claims 1 to 2, characterized in that, The dispersant includes at least one of ethylene bis-stearamide and dispersant KT-8A; the silane coupling agent includes at least one of A-1120 and QX-618.

8. A method for preparing the tear-resistant heavy-duty truck engine suspension rubber material according to any one of claims 1-7, characterized in that, Includes the following steps: by weight parts, S1: Mix and soak the reinforcing fiber with a silane coupling agent, then irradiate with ultraviolet light to obtain pretreated reinforcing fiber for later use; S2: Natural rubber and styrene-butadiene rubber are mixed and mixed to obtain raw rubber material. Then, pretreated reinforcing fibers are added, and after heating and mixing, carbon black, activator, antioxidant, microcrystalline wax, tackifier, and dispersant are added. The mixture is then kept at a high temperature and thoroughly mixed to obtain intermediate compound. S3: Cool the intermediate compound to room temperature, let it stand, add it to the internal mixer, along with sulfur and accelerator, and mix to obtain the compound. S4: Inject the compounded rubber into a mold to obtain a tear-resistant heavy-duty truck engine suspension rubber material.

9. The preparation method according to claim 8, characterized in that, In S1, the soaking time is 10 min to 20 min, and the ultraviolet irradiation time is 5 min to 10 min; In S2, the mixing time is 30s~50s; the heating mixing refers to heating to 120℃~140℃ and mixing for 15s~30s; the heat preservation mixing refers to mixing at 120℃~140℃ for 10min~18min.

10. The preparation method according to claim 8, characterized in that, In S3, the settling time is 6h~12h; the mixing temperature is 95℃~115℃, and the time is 2min~4min; In S4, the injection molding process involves injecting the compounded rubber into a molding mold at 150°C to 170°C using an injection molding device, maintaining a pressure of 8MPa to 10MPa, and vulcanizing for 5 to 10 minutes. Alternatively, the compounded rubber can be injected into a molding die at 130℃~150℃ using injection molding equipment, maintaining a pressure of 8MPa~10MPa, and vulcanizing for 6min~12min.

Images