A self-cleaning rubber material, its preparation method and application in a belt

Abstract

The present invention provides a self-cleaning rubber material, a preparation method thereof, and an application in a belt. The self-cleaning rubber material provided, by weight parts, comprises: 100 parts of carboxylated nitrile rubber; 50 - 80 parts of nano-silica; 1.1 - 4.5 parts of epoxidized soybean oil; 4 - 6 parts of zinc oxide; 0.1 - 0.5 part of stannic chloride; 0.1 - 0.5 part of acrylic acid; 1 - 3 parts of stearic acid; 20 - 40 parts of carbon black N330; 1 - 3.5 parts of hexamethylenetetramine; 2 - 5 parts of resorcinol resin; 2 - 5 parts of sulfur. Under the working conditions of long-term use, the super-hydrophobic silica comprised in the self-cleaning rubber material provided by the present invention is very difficult to peel off from the rubber matrix, so that with the extension of the service time, it still has good wear resistance and self-lubricating effect. Therefore, it is more suitable for preparing a belt coating rubber to produce belt products.

Description

Technical Field

[0001] The invention belongs to the technical field of new materials, and in particular relates to a self-cleaning rubber material, a preparation method thereof, and an application in a belt. Background Art

[0002] Belt drive is smoother than chain drive, with much less jerking and noise, and almost no maintenance required, so motorcycle belts have become increasingly popular in recent years. However, motorcycle belt drives are not completely maintenance-free. For example, if dust and grit are stuck on motorcycle belts and pulleys and are not cleaned in time, they will make a creaking and harsh sound when riding, and the abnormal sound is particularly obvious when running in parallel with silent vehicles, which makes the user experience poor. In addition, it will directly affect the life of the belt.

[0003] If the belt is made to have a self-cleaning function, the condition of its adhesion to dust and gravel will be significantly improved, thereby effectively reducing the belt noise and improving the belt life. Material self-cleaning can be achieved through the "lotus effect", that is, a material with a porous structure and super-hydrophobic properties is selected to prepare a self-cleaning material. For example, silicon dioxide, its surface is rich in holes, but white carbon black is hydrophilic, and it is necessary to give it super-hydrophobicity before it can be used. According to relevant literature reports such as patents, silicon dioxide can be treated with siloxanes to improve the hydrophobicity of silicon dioxide, but the modified super-hydrophobic silicon dioxide is applied to rubber materials, and super-hydrophobic silicon dioxide is combined with rubber according to van der Waals force, but the van der Waals force strength is low, which causes super-hydrophobic silicon dioxide to be directly combined with rubber substrate. It is foreseeable that the self-cleaning rubber material prepared by this method will be peeled off from the rubber matrix during long-term use, so as to extend the use time, the self-cleaning effect of the self-cleaning rubber material will gradually weaken. Summary of the invention

[0004] In view of the problems existing in the above-mentioned prior art, the first purpose of the present invention is to provide a self-cleaning rubber material; the second purpose of the present invention is to provide a method for preparing the cleaning rubber material; the third purpose of the present invention is to provide the application of the cleaning rubber material in the preparation of belts.

[0005] The purpose of the present invention is achieved through the following technical solutions:

[0006] In one aspect, the present invention provides a self-cleaning rubber material. The components for preparing the self-cleaning rubber material include, by weight:

[0007]

[0008]

[0009] As a further description of the above technical solution, the Mooney viscosity ML(1+4min, 100°) of the carboxylated nitrile rubber is 35-50;

[0010] The acrylonitrile content included in the carboxylated nitrile rubber is between 25% and 35%.

[0011] As a further description of the above technical solution, the nano-silica is fumed silica.

[0012] As a further description of the above technical solution, the epoxy value of the epoxidized soybean oil is 4%-10%, and the viscosity is 350 mPa·s - 450 mPa·s.

[0013] As a further description of the above technical solution, the weight ratio of the nano-silica to the epoxidized soybean oil is between 18 and 45.

[0014] As a further description of the above technical solution, the hexamethylenetetramine includes but is not limited to HVA-2 and HMMM.

[0015] On the other hand, the present invention provides a method for preparing the self-cleaning rubber material as described above, including the following steps:

[0016] (1) First, put the formulated amount of epoxidized soybean oil, nano-silica, and stannic chloride into a Banbury mixer for mixing;

[0017] (2) Then, put the formulated amount of carboxylated nitrile rubber and acrylic acid into the Banbury mixer and mix with the product of step (1);

[0018] (3) Next, put the formulated amount of carbon black, stearic acid, and resorcinol resin into the Banbury mixer and mix with the product of step (2);

[0019] (4) Finally, put the formulated amount of zinc oxide, hexamethylenetetramine, and sulfur into the Banbury mixer and mix with the product of step (3) to obtain the self-cleaning rubber material.

[0020] As a further description of the above technical solution, in step (1), the mixing temperature is 80°C - 90°C, the mixing time is 3 min - 4 min, and the rotation speed of the Banbury mixer is 15 r / min;

[0021] In step (2), the mixing temperature is 135°C - 145°C, the mixing time is 3 min - 5 min, and the rotation speed of the Banbury mixer is 20 r / min - 30 r / min;

[0022] In step (3), the mixing temperature is 110°C - 120°C, the mixing time is 3 min - 4 min, and the rotation speed of the Banbury mixer is 15 r / min;

[0023] In step (4), the mixing temperature is 80°C - 90°C, the mixing time is 2 min - 3 min, and the rotational speed of the internal mixer is 15 r / min.

[0024] On the other hand, the present invention also provides the application of the self-cleaning rubber material as described above in the preparation of belts.

[0025] By means of the above technical solutions, the outstanding effects of the present invention are as follows:

[0026] The self-cleaning rubber material of the present invention is prepared with 100 parts by weight of carboxylated nitrile rubber, 50 - 80 parts of nano-silica, 1.1 - 4.5 parts of epoxidized soybean oil, 4 - 6 parts of zinc oxide, 0.1 - 0.5 part of stannic chloride, 0.1 - 0.5 part of acrylic acid, 1 - 3 parts of stearic acid, 20 - 40 parts of carbon black N330, 1 - 3.5 parts of hexamethylenetetramine, 2 - 5 parts of resorcinol resin, and 2 - 5 parts of sulfur. In the preparation process, first, the nano-silica is hydrophobized with epoxidized soybean oil, and then the product of the hydrophobization treatment (superhydrophobic silica) is grafted onto the rubber molecular chain, and the two form a chemical crosslinking, greatly enhancing the binding force. Thus, it is ensured that under the working conditions of long-term use of the finally prepared self-cleaning rubber material, the superhydrophobic silica is difficult to peel off from the rubber matrix, so that the prepared self-cleaning rubber material still has good wear resistance and self-lubricating effect with the extension of the use time. Therefore, it is more suitable for preparing belt coating rubber to produce belt products. Description of the Drawings

[0027] Figure 1 It is the grafting chemical reaction equation of step (1) included in the preparation method of the self-cleaning rubber material in the embodiment of the present invention;

[0028] Figure 2 It is the grafting chemical reaction equation of step (2) included in the preparation method of the self-cleaning rubber material in the embodiment of the present invention;

[0029] Figure 3 It is the state diagram of the motorcycle muddy road test with a distance of 0 km for the belt product produced from the self-cleaning rubber material in Example 1 of the present invention;

[0030] Figure 4 It is the state diagram of the motorcycle muddy road test with a distance of 500 km for the belt product produced from the self-cleaning rubber material in Example 1 of the present invention;

[0031] Figure 5 It is the state diagram of the motorcycle muddy road test with a distance of 1500 km for the belt product produced from the self-cleaning rubber material in Example 1 of the present invention;

[0032] Figure 6 The state diagram of the belt product made of the self-cleaning rubber material in Embodiment 2 of the present invention during the motorcycle sediment road test at a distance of 0 km;

[0033] Figure 7 The state diagram of the belt product made of the self-cleaning rubber material in Embodiment 2 of the present invention during the motorcycle sediment road test at a distance of 500 km;

[0034] Figure 8 The state diagram of the belt product made of the self-cleaning rubber material in Embodiment 2 of the present invention during the motorcycle sediment road test at a distance of 1500 km;

[0035] Figure 9 The state diagram of the belt product made of the self-cleaning rubber material in Comparative Example 1 of the present invention during the motorcycle sediment road test at a distance of 0 km;

[0036] Figure 10 The state diagram of the belt product made of the self-cleaning rubber material in Comparative Example 1 of the present invention during the motorcycle sediment road test at a distance of 500 km;

[0037] Figure 11 The state diagram of the belt product made of the self-cleaning rubber material in Comparative Example 1 of the present invention during the motorcycle sediment road test at a distance of 1500 km;

[0038] Figure 12 The state diagram of the belt product made of the self-cleaning rubber material in Comparative Example 2 of the present invention during the motorcycle sediment road test at a distance of 0 km;

[0039] Figure 13 The state diagram of the belt product made of the self-cleaning rubber material in Comparative Example 2 of the present invention during the motorcycle sediment road test at a distance of 500 km;

[0040] Figure 14 The state diagram of the belt product made of the self-cleaning rubber material in Comparative Example 2 of the present invention during the motorcycle sediment road test at a distance of 1500 km. Detailed implementation manners

[0041] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention. It should be understood that the experimental methods described in the following embodiments are all conventional methods unless otherwise specified, and the reagents and materials described are all commercially available unless otherwise specified.

[0042] Example 1

[0043] This example provides a self-cleaning rubber material. By weight, the components for preparing this self-cleaning rubber material include:

[0044]

[0045] Specifically, in this example, the Mooney viscosity ML(1+4min, 100°) of the carboxylated nitrile rubber is 40. Of course, in other examples, the Mooney viscosity ML(1+4min, 100°) of the carboxylated nitrile rubber can also be other values between 35 and 50, and the carboxylated nitrile rubber can also be replaced by hydrogenated carboxylated nitrile rubber. In this example, the acrylonitrile content included in the carboxylated nitrile rubber is between 25% and 35%; the nano-silica is fumed silica, the epoxy value of the epoxidized soybean oil is 4%, and the viscosity is 350 mPa·s - 450 mPa·s; the dosage of the nano-silica and the epoxidized soybean oil follows the rule that the nano-silica weight / the epoxidized soybean oil weight = (1.8 / the epoxidized soybean oil epoxy value); the hexamethylenetetramine selects HVA-2. Of course, in other examples, the hexamethylenetetramine includes but is not limited to HVA-2 and HMMM; the resorcinol resin preferably selects SUMIKANOL 507 and RT3970.

[0046] As Figures 1 to 2 shown, this example also provides a preparation method for the above self-cleaning rubber material. The preparation method includes:

[0047] (1) First, put 1.1 parts of epoxidized soybean oil, 50 parts of nano-silica, and 0.2 parts of stannic chloride into a Banbury mixer for mixing. In this step, set the mixing temperature to 85°C, the mixing time to 3.5 min, and the rotation speed of the Banbury mixer to 15 r / min; the Banbury mixer is, for example, a tilting Banbury mixer;

[0048] (2) Then, put 100 parts of carboxylated nitrile rubber and 0.3 parts of acrylic acid into the Banbury mixer and mix with the product of step (1). In this step, set the mixing temperature to 140°C, the mixing time to 4 min, and the rotation speed of the Banbury mixer to 25 r / min;

[0049] (3) Next, put 30 parts of carbon black, 2 parts of stearic acid, and 3 parts of resorcinol resin into the Banbury mixer and mix with the product of step (2). In this step, set the mixing temperature to 120°C, the mixing time to 3.5 min, and the rotation speed of the Banbury mixer to 15 r / min;

[0050] (4) Finally, 4 parts of zinc oxide, 1.5 parts of hexamethylenetetramine, and 2.5 parts of sulfur are put into the internal mixer and kneaded with the product of step (3) to obtain the self-cleaning rubber material; in this step, the kneading temperature is set at 85 °C, the kneading time is 2.5 min, and the rotational speed of the internal mixer is 15 r / min.

[0051] In the above preparation method, in step (1), nano-silica is first hydrophobized with epoxidized soybean oil, and then in step (2), the product of the hydrophobization treatment (superhydrophobic silica) is grafted onto the rubber molecular chain, and the two form a chemical crosslink, greatly enhancing the binding force. This ensures that in the working conditions of long-term use of the finally prepared self-cleaning rubber material, the superhydrophobic silica is difficult to peel off from the rubber matrix, so that the prepared self-cleaning rubber material still has good wear resistance and self-lubricating effect with the extension of the service time.

[0052] This example also provides the application of the above self-cleaning rubber material in the preparation of a belt: the self-cleaning rubber material prepared above is dissolved in toluene to obtain a rubber slurry, and the obtained rubber slurry is spread on canvas, and then the coated canvas can be used for belt production.

[0053] Example 2

[0054] This example provides a self-cleaning rubber material, which is different from that in Example 1 in that in this example, the epoxy degree, dosage of the epoxidized soybean oil, and dosage of the nano-silica are different.

[0055] Specifically, in this example, based on parts by weight, the components for preparing the self-cleaning rubber material include:

[0056]

[0057] Specifically, in this example, the Mooney viscosity ML(1+4min, 100°) of the carboxylated nitrile rubber is 40. Of course, in other examples, the Mooney viscosity ML(1+4min, 100°) of the carboxylated nitrile rubber can also be other values between 35-50. The acrylonitrile content included in the carboxylated nitrile rubber is between 25%-35%; the nano-silica is fumed silica, the epoxy degree of the epoxidized soybean oil is 10%, and the viscosity is 350 mPa·s - 450 mPa·s; the dosage of the nano-silica and the epoxidized soybean oil also follows the rule of nano-silica weight / epoxidized soybean oil weight = (1.8 / epoxy degree of epoxidized soybean oil); the hexamethylenetetramine is selected as HVA-2. Of course, in other examples, the hexamethylenetetramine includes but is not limited to HVA-2, HMMM.

[0058] This embodiment also provides a preparation method of the above self-cleaning rubber material, and the preparation method includes:

[0059] (1) First, 4.4 parts of epoxidized soybean oil, 80 parts of nano-silica, and 0.2 part of stannic chloride are put into a mixer for mixing; in this step, the mixing temperature is set to 85°C, the mixing time is 3.5 min, and the rotation speed of the mixer is 15 r / min; the mixer is, for example, a tipping mixer;

[0060] (2) Then, 100 parts of carboxylated nitrile rubber and 0.3 part of acrylic acid are put into the mixer and mixed with the product of step (1); in this step, the mixing temperature is set to 140°C, the mixing time is 4 min, and the rotation speed of the mixer is 25 r / min;

[0061] (3) Next, 30 parts of carbon black, 2 parts of stearic acid, and 3 parts of resorcinol resin are put into the mixer and mixed with the product of step (2); in this step, the mixing temperature is set to 120°C, the mixing time is 3.5 min, and the rotation speed of the mixer is 15 r / min;

[0062] (4) Finally, 4 parts of zinc oxide, 1.5 parts of hexamethylenetetramine, and 2.5 parts of sulfur are put into the mixer and mixed with the product of step (3) to obtain the self-cleaning rubber material; in this step, the mixing temperature is set to 85°C, the mixing time is 2.5 min, and the rotation speed of the mixer is 15 r / min.

[0063] This embodiment also provides an application of the above self-cleaning rubber material in the preparation of a belt: dissolving the prepared self-cleaning rubber material in toluene to obtain a rubber slurry, scraping the obtained rubber slurry onto canvas, and then the scraped canvas can be used for belt production.

[0064] Example 3

[0065] This embodiment provides a self-cleaning rubber material, which is different from that in Example 1 in that in this embodiment, the epoxy degree, dosage of epoxidized soybean oil, and dosage of nano-silica are different.

[0066] Specifically, in this embodiment, based on parts by weight, the components for preparing the self-cleaning rubber material include:

[0067]

[0068] Specifically, in this embodiment, the Mooney viscosity ML(1+4min, 100°) of the carboxylated nitrile rubber is 40. Of course, in other embodiments, the Mooney viscosity ML(1+4min, 100°) of the carboxylated nitrile rubber can also be other values between 35 and 50. The acrylonitrile content included in the carboxylated nitrile rubber is between 25% and 35%; the nano-silica is fumed silica, the epoxy value of the epoxidized soybean oil is 10%, and the viscosity is 350 mPa·s - 450 mPa·s; the dosage of the nano-silica and the epoxidized soybean oil also follows the formula: nano-silica weight / epoxidized soybean oil weight = (1.8 / epoxidized soybean oil epoxy value); the hexamethylenetetramine is selected as HVA-2. Of course, in other embodiments, the hexamethylenetetramine includes but is not limited to HVA-2 and HMMM.

[0069] This embodiment also provides a preparation method of the above self-cleaning rubber material, and the preparation method includes:

[0070] (1) First, put 3.3 parts of epoxidized soybean oil, 60 parts of nano-silica, and 0.2 part of stannic chloride into a mixer for mixing; in this step, set the mixing temperature to 85°C, the mixing time to 3.5 min, and the rotation speed of the mixer to 15 r / min; the mixer is, for example, a tipping mixer;

[0071] (2) Then, put 100 parts of carboxylated nitrile rubber and 0.3 part of acrylic acid into the mixer, and mix with the product of step (1); in this step, set the mixing temperature to 140°C, the mixing time to 4 min, and the rotation speed of the mixer to 25 r / min;

[0072] (3) Next, put 30 parts of carbon black, 2 parts of stearic acid, and 3 parts of resorcinol resin into the mixer, and mix with the product of step (2); in this step, set the mixing temperature to 120°C, the mixing time to 3.5 min, and the rotation speed of the mixer to 15 r / min;

[0073] (4) Finally, put 4 parts of zinc oxide, 1.5 parts of hexamethylenetetramine, and 2.5 parts of sulfur into the mixer, and mix with the product of step (3) to obtain the self-cleaning rubber material; in this step, set the mixing temperature to 85°C, the mixing time to 2.5 min, and the rotation speed of the mixer to 15 r / min.

[0074] This embodiment also provides an application of the above self-cleaning rubber material in the preparation of a belt: Dissolve the self-cleaning rubber material prepared above in toluene to obtain a rubber slurry, scrape the obtained rubber slurry onto canvas, and the obtained scraped canvas can be used for belt production.

[0075] Example 4

[0076] This embodiment provides a self-cleaning rubber material, which is different from that in Embodiment 1 in that in this embodiment, the epoxide degree, dosage of epoxidized soybean oil, and dosage of nano-silica are different.

[0077] Specifically, in this embodiment, based on parts by weight, the components for preparing the self-cleaning rubber material include:

[0078]

[0079]

[0080] Specifically, in this embodiment, the Mooney viscosity ML(1+4min, 100°) of the carboxylated nitrile rubber is 40. Of course, in other embodiments, the Mooney viscosity ML(1+4min, 100°) of the carboxylated nitrile rubber can also be other values between 35 and 50. The acrylonitrile content included in the carboxylated nitrile rubber is between 25% and 35%; the nano-silica is fumed silica, the epoxide degree of the epoxidized soybean oil is 10%, and the viscosity is 350 mPa·s - 450 mPa·s; the dosage of the nano-silica and the epoxidized soybean oil also follows the rule of nano-silica weight / epoxidized soybean oil weight = (1.8 / epoxide degree of epoxidized soybean oil); the hexamethylenetetramine is selected as HVA-2. Of course, in other embodiments, the hexamethylenetetramine includes but is not limited to HVA-2 and HMMM.

[0081] This embodiment also provides a preparation method of the above self-cleaning rubber material, and the preparation method includes:

[0082] (1) First, put 3.6 parts of epoxidized soybean oil, 65 parts of nano-silica, and 0.2 parts of stannic chloride into a mixer for mixing; in this step, set the mixing temperature to 85°C, the mixing time to 3.5 min, and the rotation speed of the mixer to 15 r / min; the mixer is, for example, a tilting mixer;

[0083] (2) Then, put 100 parts of carboxylated nitrile rubber and 0.3 parts of acrylic acid into the mixer and mix with the product of step (1); in this step, set the mixing temperature to 140°C, the mixing time to 4 min, and the rotation speed of the mixer to 25 r / min;

[0084] (3) Then, put 30 parts of carbon black, 2 parts of stearic acid, and 3 parts of resorcinol resin into the mixer and mix with the product of step (2); in this step, set the mixing temperature to 120°C, the mixing time to 3.5 min, and the rotation speed of the mixer to 15 r / min;

[0085] (4) Finally, 4 parts of zinc oxide, 1.5 parts of hexamethylenetetramine, and 2.5 parts of sulfur are put into the internal mixer and kneaded with the product of step (3) to obtain the self-cleaning rubber material; in this step, the kneading temperature is set at 85 °C, the kneading time is 2.5 min, and the rotational speed of the internal mixer is 15 r / min.

[0086] This embodiment also provides the application of the above self-cleaning rubber material in the preparation of a belt: dissolving the prepared self-cleaning rubber material in toluene can obtain a rubber slurry, scraping the obtained rubber slurry onto canvas, and then the scraped canvas can be used for belt production.

[0087] Example 5

[0088] This embodiment provides a self-cleaning rubber material, which is different from that in Example 1 in that in this embodiment, the epoxy degree, dosage of the epoxy soybean oil, and dosage of the nano-silica are different.

[0089] Specifically, in this embodiment, based on parts by weight, the components for preparing the self-cleaning rubber material include:

[0090]

[0091]

[0092] Specifically, in this embodiment, the Mooney viscosity ML(1+4 min, 100 °) of the carboxylated nitrile rubber is 40. Of course, in other embodiments, the Mooney viscosity ML(1+4 min, 100 °) of the carboxylated nitrile rubber can also be other values between 35 and 50. The acrylonitrile content included in the carboxylated nitrile rubber is between 25% and 35%; the nano-silica is fumed silica, the epoxy degree of the epoxidized soybean oil is 10%, and the viscosity is 350 mPa·s - 450 mPa·s; the dosage of the nano-silica and the epoxidized soybean oil also follows the rule of nano-silica weight / epoxidized soybean oil weight = (1.8 / epoxy degree of epoxidized soybean oil); the hexamethylenetetramine is selected as HVA-2. Of course, in other embodiments, the hexamethylenetetramine includes but is not limited to HVA-2 and HMMM.

[0093] This embodiment also provides a preparation method of the above self-cleaning rubber material, and the preparation method includes:

[0094] (1) First, 3.9 parts of epoxidized soybean oil, 70 parts of nano-silica, and 0.2 part of stannic chloride are put into an internal mixer for kneading; in this step, the kneading temperature is set at 85 °C, the kneading time is 3.5 min, and the rotational speed of the internal mixer is 15 r / min; the internal mixer is, for example, a tipping internal mixer;

[0095] (2) Next, 100 parts of carboxylated nitrile rubber and 0.3 part of acrylic acid are put into the internal mixer and kneaded with the product of step (1); in this step, the kneading temperature is set at 140 °C, the kneading time is 4 min, and the rotational speed of the internal mixer is 25 r / min;

[0096] (3) Then, 30 parts of carbon black, 2 parts of stearic acid, and 3 parts of resorcinol resin are put into the internal mixer and kneaded with the product of step (2); in this step, the kneading temperature is set at 120 °C, the kneading time is 3.5 min, and the rotational speed of the internal mixer is 15 r / min;

[0097] (4) Finally, 4 parts of zinc oxide, 1.5 parts of hexamethylenetetramine, and 2.5 parts of sulfur are put into the internal mixer and kneaded with the product of step (3) to obtain the self-cleaning rubber material; in this step, the kneading temperature is set at 85 °C, the kneading time is 2.5 min, and the rotational speed of the internal mixer is 15 r / min.

[0098] This embodiment also provides the application of the above self-cleaning rubber material in the preparation of a belt: dissolving the self-cleaning rubber material prepared above in toluene can obtain a rubber slurry, scraping the obtained rubber slurry onto canvas, and then the scraped canvas can be used for belt production.

[0099] Comparative Example 1

[0100] In this comparative example, the components for preparing the self-cleaning rubber material are the same as those in Example 1, but the preparation method for preparing the self-cleaning rubber material is different from that in Example 1.

[0101] Specifically, in this comparative example, the preparation method of the above self-cleaning rubber material includes:

[0102] (1) First, 100 parts of carboxylated nitrile rubber, 1.1 parts of epoxidized soybean oil (epoxy degree of 4%), 50 parts of nano-silica, 0.2 part of stannic chloride, 0.3 part of acrylic acid, 30 parts of carbon black, 2 parts of stearic acid, and 3 parts of resorcinol resin are put into an internal mixer for kneading; in this step, the kneading temperature is set at 130 °C, the kneading time is 10 min, and the rotational speed of the internal mixer is 20 r / min;

[0103] (2) Then, 4 parts of zinc oxide, 1.5 parts of hexamethylenetetramine, and 2.5 parts of sulfur are put into the internal mixer and kneaded with the product of step (1) to obtain a self-cleaning rubber material; in this step, the kneading temperature is set at 85 °C, the kneading time is 2.5 min, and the rotational speed of the internal mixer is 15 r / min.

[0104] Use the self-cleaning rubber material prepared in this comparative example to prepare a belt. The specific process is still as follows: Dissolve it in toluene to obtain a rubber slurry, scrape the obtained rubber slurry onto canvas, and the obtained scraped canvas can be used for belt production.

[0105] Comparative Example 2

[0106] The components for preparing the self-cleaning rubber material in this comparative example are different from those in Example 1. Specifically, epoxidized soybean oil is not used in this comparative example.

[0107] That is, in this comparative example, based on parts by weight, the components for preparing the self-cleaning rubber material include:

[0108]

[0109] Specifically, in this comparative example, the preparation method of the above self-cleaning rubber material includes:

[0110] (1) First, put 80 parts of nano-silica and 0.2 parts of stannic chloride into a mixer for mixing; in this step, set the mixing temperature to 85 °C, the mixing time to 3.5 min, and the rotation speed of the mixer to 15 r / min; the mixer is, for example, a tilting mixer;

[0111] (2) Then, put 100 parts of carboxylated nitrile rubber and 0.3 parts of acrylic acid into the mixer and mix with the product of step (1); in this step, set the mixing temperature to 140 °C, the mixing time to 4 min, and the rotation speed of the mixer to 25 r / min;

[0112] (3) Next, put 30 parts of carbon black, 2 parts of stearic acid, and 3 parts of resorcinol resin into the mixer and mix with the product of step (2); in this step, set the mixing temperature to 120 °C, the mixing time to 3.5 min, and the rotation speed of the mixer to 15 r / min;

[0113] (4) Finally, put 4 parts of zinc oxide, 1.5 parts of hexamethylenetetramine, and 2.5 parts of sulfur into the mixer and mix with the product of step (3) to obtain the self-cleaning rubber material; in this step, set the mixing temperature to 85 °C, the mixing time to 2.5 min, and the rotation speed of the mixer to 15 r / min.

[0114] Use the self-cleaning rubber material prepared in this comparative example to prepare a belt. The specific process is still as follows: Dissolve it in toluene to obtain a rubber slurry, scrape the obtained rubber slurry onto canvas, and the obtained scraped canvas can be used for belt production.

[0115] The components and their ratios of the self-cleaning rubber materials described in Examples 1-5 and Comparative Examples 1-2 are shown in Table 1 below.

[0116] Table 1 Components and their ratios of the self-cleaning rubber materials described in Examples 1-5 and Comparative Examples 1-2

[0117]

[0118] Self-cleaning rubber material strength test:

[0119] The self-cleaning rubber materials prepared in Examples 1-5 and Comparative Examples 1-2 were parked for 24 h respectively, and were vulcanized and molded for 20 min at 170 °C and a pressure of 15 MPa using a flat vulcanizer. The vulcanized and molded self-cleaning rubber materials were all subjected to mechanical property tests, and the test results are shown in Table 2 below.

[0120] Table 2 Test results of the mechanical properties of the self-cleaning rubber materials

[0121] Test item Example 1 Example 2 Example 3 Example 4 Example 5 Comparative example 1 Comparative example 2 Tensile strength / MPa 34.5 36.8 33.7 34.2 35.3 18.9 22.3 Elongation at break / % 347 408 363 379 388 208 276 <![CDATA[DIN wear / (mm 3 )]]> 89 63 101 90 78 138 179

[0122] Belt mud road test:

[0123] Belt products were produced using the calendered canvas obtained in Examples 1-5 and Comparative Examples 1-2 respectively, and the obtained belt products were subjected to a motorcycle mud road test. Please refer to Figures 3 to 14 , and the road test results are as follows:

[0124] ① When the motorcycle mud road test distance was 0 km,

[0125] The belt products in Examples 1-5 and Comparative Examples 1-2 were all smooth on the surface and free of dust.

[0126] ② When the motorcycle mud road test distance was 500 km,

[0127] The belt in Example 1 was slightly worn and slightly adhered with dust;

[0128] The belt in Example 2 was slightly worn and adhered with very little dust;

[0129] The belt in Example 3 was slightly worn and slightly adhered with dust;

[0130] The belt in Example 4 was slightly worn and adhered with very little dust;

[0131] The belt in Example 5 was slightly worn and adhered with very little dust;

[0132] The belt in Comparative Example 1 was slightly worn and adhered with more dust;

[0133] The belt in Comparative Example 2 was worn to a greater extent and adhered with more dust.

[0134] ③ When the motorcycle mud road test distance was 1500 km,

[0135] The belt in Example 1 was slightly worn and adhered with a small amount of dust;

[0136] The belt in Example 2 was slightly worn and slightly adhered with dust;

[0137] The belt in Example 3 was slightly worn and adhered with a small amount of dust;

[0138] The belt in Example 4 was slightly worn and adhered with a small amount of dust;

[0139] The belt in Example 5 was slightly worn and slightly adhered with dust;

[0140] The belt in Comparative Example 1 was severely worn and adhered with a large amount of dust;

[0141] The belt in Comparative Example 2 was severely worn and adhered with a large amount of dust.

[0142] In summary, the self-cleaning rubber material prepared by using the self-cleaning rubber material formula and preparation method in this embodiment has good wear resistance and self-lubricating effect, and is more suitable for preparing belt coating adhesives to produce belt products, so that the produced belt products can continuously maintain good wear resistance and self-cleaning effect with the extension of service time.

[0143] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any changes, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A self-cleaning rubber material, characterized in that: The components for preparing the self-cleaning rubber material include, by weight: Wherein, the preparation method of the self-cleaning rubber material comprises the following steps: (1) First, the formulated amount of epoxidized soybean oil, nano-silicon dioxide and tin tetrachloride are put into an internal mixer for mixing; (2) then adding the formulated amount of carboxylated nitrile rubber and acrylic acid into the internal mixer and mixing them with the product of step (1); (3) adding the formulated amount of carbon black, stearic acid, and resorcinol resin into the internal mixer and mixing with the product of step (2); (4) finally, adding the formulated amount of zinc oxide, hexamethylenetetramine and sulfur into the internal mixer, and mixing them with the product of step (3) to obtain the self-cleaning rubber material; Wherein, in step (1), the mixing temperature is 80°C-90°C, the mixing time is 3min-4min, and the speed of the internal mixer is 15r / min; In step (2), the mixing temperature is 135°C-145°C, the mixing time is 3min-5min, and the speed of the internal mixer is 20r / min0-30r / min; In step (3), the mixing temperature is 110°C-120°C, the mixing time is 3min-4min, and the speed of the internal mixer is 15r / min; In step (4), the mixing temperature is 80°C-90°C, the mixing time is 2min-3min, and the rotation speed of the internal mixer is 15r / min.

2. The self-cleaning rubber material according to claim 1, characterized in that: The Mooney viscosity ML of the carboxylated nitrile rubber is 35-50 under the conditions of preheating at 100° C. for 1 minute and rotating for 4 minutes; The acrylonitrile content of the carboxylated nitrile rubber is between 25% and 35%.

3. The self-cleaning rubber material according to claim 1, characterized in that: The nano silicon dioxide is fumed white carbon black.

4. The self-cleaning rubber material according to claim 1, characterized in that: The epoxidation degree of the epoxidized soybean oil is 4%-10%, and the viscosity is 350mPa·s-450mPa·s.

5. The self-cleaning rubber material according to claim 1, characterized in that: The weight ratio of the nano silicon dioxide to the epoxidized soybean oil is between 18 and 45.

6. The self-cleaning rubber material according to claim 1, characterized in that: The hexamethylenetetramine includes but is not limited to HVA-2 and HMMM.

7. Use of the self-cleaning rubber material according to any one of claims 1 to 6 in the preparation of belts.

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