Self-cleaning rubber material, preparation method thereof and application of self-cleaning rubber material in belt

Abstract

The invention provides a self-cleaning rubber material, a preparation method thereof and application of the self-cleaning rubber material in a belt, and the self-cleaning rubber material provided by the invention comprises the following components in parts by weight: 100 parts of carboxylated nitrile rubber; 50 to 80 parts of nano silicon dioxide; 1.1 to 4.5 parts of epoxidized soybean oil; 4-6 parts of zinc oxide; 0.1 to 0.5 part of tin tetrachloride; 0.1 to 0.5 part of acrylic acid; 1-3 parts of stearic acid; 20 to 40 parts of carbon black N330; 1 to 3.5 parts of hexamethylenetetramine; 2 to 5 parts of resorcinol resin; and 2-5 parts of sulfur. The self-cleaning rubber material provided by the invention has the advantages that under the working condition of long-term use, the contained super-hydrophobic silicon dioxide is difficult to strip from a rubber matrix, so that the self-cleaning rubber material still has good wear resistance and self-lubricating effect along with the prolonging of the use time, and the self-cleaning rubber material is more suitable for preparing belt coating glue for producing 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 of the carboxylated nitrile rubber is between 25% and 35%.

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

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

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

[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, comprising the following steps:

[0016] (1) First, the formulated amount of epoxidized soybean oil, nano-silicon dioxide and tin tetrachloride are put into an internal mixer for mixing;

[0017] (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);

[0018] (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);

[0019] (4) Finally, the formulated amount of zinc oxide, hexamethylenetetramine and sulfur is added to the internal mixer and mixed 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 3min-4min, and the speed of the internal mixer is 15r / min;

[0021] 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;

[0022] 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;

[0023] 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.

[0024] In another aspect, the present invention also provides use of the self-cleaning rubber material described above in preparing a belt.

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

[0026] The self-cleaning rubber material of the present invention is prepared by using, by weight, 100 parts of carboxylated nitrile rubber, 50-80 parts of nano-silicon dioxide, 1.1-4.5 parts of epoxidized soybean oil, 4-6 parts of zinc oxide, 0.1-0.5 parts of tin tetrachloride, 0.1-0.5 parts 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, the epoxidized soybean oil is firstly used to treat the nano-silicon dioxide. The silica is hydrophobized, and then the hydrophobized product (super-hydrophobic silica) is grafted onto the rubber molecular chain. The two form chemical crosslinks, and the bonding force is greatly enhanced. This ensures that the self-cleaning rubber material finally prepared is difficult to be peeled off from the rubber matrix under long-term use conditions. As a result, the prepared self-cleaning rubber material still has good wear resistance and self-lubricating effects as the use time increases. Therefore, it is more suitable for preparing belt coating rubber to produce belt products. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0029] Figure 3 This is a state diagram of a motorcycle mud and sand road test at a distance of 0 km using a belt product produced by the self-cleaning rubber material in Example 1 of the present invention;

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

[0031] Figure 5 This is a state diagram of a motorcycle mud and sand road test with a distance of 1500 km using a belt product produced by the self-cleaning rubber material in Example 1 of the present invention;

[0032] Figure 6 This is a state diagram of a motorcycle mud and sand road test at a distance of 0 km using a belt product produced by the self-cleaning rubber material in Example 2 of the present invention;

[0033] Figure 7 This is a state diagram of a motorcycle mud and sand road test with a distance of 500 km using a belt product produced by the self-cleaning rubber material in Example 2 of the present invention;

[0034] Figure 8 This is a state diagram of a motorcycle mud and sand road test with a distance of 1500 km using a belt product produced by the self-cleaning rubber material in Example 2 of the present invention;

[0035] Fig. 9 This is a state diagram of a motorcycle mud and sand road test at a distance of 0 km using a belt product produced by the self-cleaning rubber material in Comparative Example 1 of the present invention;

[0036] Fig.10 A state diagram of a motorcycle mud and sand road test with a distance of 500 km using a belt product produced by the self-cleaning rubber material in Comparative Example 1 of the present invention;

[0037] Fig.11 A state diagram of a motorcycle mud and sand road test with a distance of 1500 km using a belt product produced by the self-cleaning rubber material in Comparative Example 1 of the present invention;

[0038] Fig.12 This is a state diagram of a motorcycle mud and sand road test at a distance of 0 km using a belt product produced by the self-cleaning rubber material in Comparative Example 2 of the present invention;

[0039] Fig.13 This is a state diagram of a motorcycle mud and sand road test with a distance of 500 km using a belt product produced by the self-cleaning rubber material in Comparative Example 2 of the present invention;

[0040] Fig.14 This is a state diagram of a motorcycle mud and sand road test at a distance of 1500 km using the belt product produced using the self-cleaning rubber material in Comparative Example 2 of the present invention. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. It should be understood that the experimental methods described in the following embodiments are conventional methods unless otherwise specified, and the reagents and materials, unless otherwise specified, can be obtained from commercial channels.

[0042] Example 1

[0043] This embodiment provides a self-cleaning rubber material. The components for preparing the self-cleaning rubber material include, by weight:

[0044]

[0045] Specifically, in the present 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 may also be other values ​​between 35-50, and the carboxylated nitrile rubber may also be replaced by hydrogenated carboxylated nitrile rubber. In this embodiment, the acrylonitrile content of the carboxylated nitrile rubber is between 25% and 35%; the nano-silica is fumed silica, the epoxidation degree of the epoxidized soybean oil is 4%, and the viscosity is 350mPa·s-450mPa·s; the dosage of the nano-silica and the epoxidized soybean oil follows the formula: weight of the nano-silica / weight of the epoxidized soybean oil=(1.8 / epoxidation degree of the epoxidized soybean oil); the hexamethylenetetramine is HVA-2, and of course, in other embodiments, the hexamethylenetetramine includes but is not limited to HVA-2 and HMMM; the resorcinol resin is preferably SUMIKANOL 507 or RT3970.

[0046] like Figure 1 to Figure 2 As shown, this embodiment also provides a method for preparing the self-cleaning rubber material, the preparation method comprising:

[0047] (1) First, 1.1 parts of epoxidized soybean oil, 50 parts of nano-silicon dioxide and 0.2 parts of tin tetrachloride are put into an internal mixer for mixing; in this step, the mixing temperature is set to 85° C., the mixing time is set to 3.5 min, and the speed of the internal mixer is set to 15 r / min; the internal mixer is, for example, a bucket internal mixer;

[0048] (2) Then, 100 parts of carboxylated nitrile rubber and 0.3 parts of acrylic acid are added to the internal mixer and mixed with the product of step (1); in this step, the mixing temperature is set to 140° C., the mixing time is set to 4 minutes, and the speed of the internal mixer is set to 25 r / min;

[0049] (3) 30 parts of carbon black, 2 parts of stearic acid, and 3 parts of resorcinol resin are added to the internal mixer and mixed with the product of step (2); in this step, the mixing temperature is set to 120° C., the mixing time is set to 3.5 min, and the speed of the internal mixer is set to 15 r / min;

[0050] (4) Finally, 4 parts of zinc oxide, 1.5 parts of hexamethylenetetramine, and 2.5 parts of sulfur are added to the internal 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 set to 2.5 min, and the speed of the internal mixer is set to 15 r / min.

[0051] In the above-mentioned preparation method, in step (1), the nano-silicon dioxide is firstly subjected to a hydrophobic treatment using epoxidized soybean oil, and then in step (2), the hydrophobic treatment product (super-hydrophobic silica) is grafted onto the rubber molecular chain, and the two form a chemical crosslink, and the bonding force is greatly enhanced, thereby ensuring that the self-cleaning rubber material finally prepared is difficult to be peeled off from the rubber matrix under long-term use conditions, so that the prepared self-cleaning rubber material still has good wear resistance and self-lubricating effect as the use time increases.

[0052] This embodiment also provides the use of the self-cleaning rubber material in preparing belts: the self-cleaning rubber material prepared as above is dissolved in toluene to obtain rubber slurry, and the obtained rubber slurry is scraped onto a canvas, and the scraped canvas obtained can be used for belt production.

[0053] Example 2

[0054] This embodiment provides a self-cleaning rubber material, which is different from Embodiment 1 in that, in this embodiment, the epoxidation degree and dosage of the epoxidized soybean oil and the dosage of nano-silicon dioxide are different.

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

[0056]

[0057] 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 35-50. The acrylonitrile content included in the carboxylated nitrile rubber is between 25% and 35%; the nano-silicon dioxide is fumed silica, the epoxidation degree of the epoxidized soybean oil is 10%, and the viscosity is 350mPa·s-450mPa·s; the dosage of the nano-silicon dioxide and the epoxidized soybean oil also follows the weight of the nano-silicon dioxide / the weight of the epoxidized soybean oil=(1.8 / epoxidation degree of the epoxidized soybean oil); the hexamethylenetetramine is selected from HVA-2. Of course, in other embodiments, the hexamethylenetetramine includes but is not limited to HVA-2 and HMMM.

[0058] This embodiment also provides a method for preparing the self-cleaning rubber material, the preparation method comprising:

[0059] (1) First, 4.4 parts of epoxidized soybean oil, 80 parts of nano-silicon dioxide and 0.2 parts of tin tetrachloride are put into an internal mixer for mixing; in this step, the mixing temperature is set to 85° C., the mixing time is set to 3.5 min, and the speed of the internal mixer is set to 15 r / min; the internal mixer is, for example, a bucket internal mixer;

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

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

[0062] (4) Finally, 4 parts of zinc oxide, 1.5 parts of hexamethylenetetramine, and 2.5 parts of sulfur are added to the internal 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 set to 2.5 min, and the speed of the internal mixer is set to 15 r / min.

[0063] This embodiment also provides the use of the self-cleaning rubber material in preparing belts: the self-cleaning rubber material prepared as above is dissolved in toluene to obtain rubber slurry, and the obtained rubber slurry is scraped onto a canvas, and the scraped canvas obtained can be used for belt production.

[0064] Example 3

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

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

[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 35-50. The acrylonitrile content included in the carboxylated nitrile rubber is between 25% and 35%; the nano-silicon dioxide is fumed silica, the epoxidation degree of the epoxidized soybean oil is 10%, and the viscosity is 350mPa·s-450mPa·s; the dosage of the nano-silicon dioxide and the epoxidized soybean oil also follows the weight of the nano-silicon dioxide / the weight of the epoxidized soybean oil=(1.8 / epoxidation degree of the epoxidized soybean oil); the hexamethylenetetramine is selected from 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 method for preparing the self-cleaning rubber material, the preparation method comprising:

[0070] (1) First, 3.3 parts of epoxidized soybean oil, 60 parts of nano-silicon dioxide and 0.2 parts of tin tetrachloride are put into an internal mixer for mixing; in this step, the mixing temperature is set to 85° C., the mixing time is set to 3.5 min, and the speed of the internal mixer is set to 15 r / min; the internal mixer is, for example, a bucket internal mixer;

[0071] (2) Then, 100 parts of carboxylated nitrile rubber and 0.3 parts of acrylic acid are added to the internal mixer and mixed with the product of step (1); in this step, the mixing temperature is set to 140° C., the mixing time is set to 4 minutes, and the speed of the internal mixer is set to 25 r / min;

[0072] (3) 30 parts of carbon black, 2 parts of stearic acid, and 3 parts of resorcinol resin are added to the internal mixer and mixed with the product of step (2); in this step, the mixing temperature is set to 120° C., the mixing time is set to 3.5 min, and the speed of the internal mixer is set to 15 r / min;

[0073] (4) Finally, 4 parts of zinc oxide, 1.5 parts of hexamethylenetetramine, and 2.5 parts of sulfur are added to the internal 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 set to 2.5 min, and the speed of the internal mixer is set to 15 r / min.

[0074] This embodiment also provides the use of the self-cleaning rubber material in preparing belts: the self-cleaning rubber material prepared as above is dissolved in toluene to obtain rubber slurry, and the obtained rubber slurry is scraped onto a canvas, and the scraped canvas obtained can be used for belt production.

[0075] Example 4

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

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

[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 35-50. The acrylonitrile content included in the carboxylated nitrile rubber is between 25% and 35%; the nano-silicon dioxide is fumed silica, the epoxidation degree of the epoxidized soybean oil is 10%, and the viscosity is 350mPa·s-450mPa·s; the dosage of the nano-silicon dioxide and the epoxidized soybean oil also follows the weight of the nano-silicon dioxide / the weight of the epoxidized soybean oil=(1.8 / epoxidation degree of the epoxidized soybean oil); the hexamethylenetetramine is selected from 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 method for preparing the self-cleaning rubber material, the preparation method comprising:

[0082] (1) First, 3.6 parts of epoxidized soybean oil, 65 parts of nano-silicon dioxide and 0.2 parts of tin tetrachloride are put into an internal mixer for mixing; in this step, the mixing temperature is set to 85° C., the mixing time is set to 3.5 min, and the speed of the internal mixer is set to 15 r / min; the internal mixer is, for example, a bucket internal mixer;

[0083] (2) Then, 100 parts of carboxylated nitrile rubber and 0.3 parts of acrylic acid are added to the internal mixer and mixed with the product of step (1); in this step, the mixing temperature is set to 140° C., the mixing time is set to 4 minutes, and the speed of the internal mixer is set to 25 r / min;

[0084] (3) 30 parts of carbon black, 2 parts of stearic acid, and 3 parts of resorcinol resin are added to the internal mixer and mixed with the product of step (2); in this step, the mixing temperature is set to 120° C., the mixing time is set to 3.5 min, and the speed of the internal mixer is set to 15 r / min;

[0085] (4) Finally, 4 parts of zinc oxide, 1.5 parts of hexamethylenetetramine, and 2.5 parts of sulfur are added to the internal 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 set to 2.5 min, and the speed of the internal mixer is set to 15 r / min.

[0086] This embodiment also provides the use of the self-cleaning rubber material in preparing belts: the self-cleaning rubber material prepared as above is dissolved in toluene to obtain rubber slurry, and the obtained rubber slurry is scraped onto a canvas, and the scraped canvas obtained can be used for belt production.

[0087] Example 5

[0088] This embodiment provides a self-cleaning rubber material, which is different from Embodiment 1 in that, in this embodiment, the epoxidation degree and dosage of the epoxidized soybean oil and the dosage of nano-silicon dioxide are different.

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

[0090]

[0091]

[0092] 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 35-50. The acrylonitrile content included in the carboxylated nitrile rubber is between 25% and 35%; the nano-silicon dioxide is fumed silica, the epoxidation degree of the epoxidized soybean oil is 10%, and the viscosity is 350mPa·s-450mPa·s; the dosage of the nano-silicon dioxide and the epoxidized soybean oil also follows the weight of the nano-silicon dioxide / the weight of the epoxidized soybean oil=(1.8 / epoxidation degree of the epoxidized soybean oil); the hexamethylenetetramine is selected from 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 method for preparing the self-cleaning rubber material, the preparation method comprising:

[0094] (1) First, 3.9 parts of epoxidized soybean oil, 70 parts of nano-silicon dioxide and 0.2 parts of tin tetrachloride are put into an internal mixer for mixing; in this step, the mixing temperature is set to 85° C., the mixing time is set to 3.5 min, and the speed of the internal mixer is set to 15 r / min; the internal mixer is, for example, a bucket internal mixer;

[0095] (2) Then, 100 parts of carboxylated nitrile rubber and 0.3 parts of acrylic acid are added to the internal mixer and mixed with the product of step (1); in this step, the mixing temperature is set to 140° C., the mixing time is set to 4 minutes, and the speed of the internal mixer is set to 25 r / min;

[0096] (3) 30 parts of carbon black, 2 parts of stearic acid, and 3 parts of resorcinol resin are added to the internal mixer and mixed with the product of step (2); in this step, the mixing temperature is set to 120° C., the mixing time is set to 3.5 min, and the speed of the internal mixer is set to 15 r / min;

[0097] (4) Finally, 4 parts of zinc oxide, 1.5 parts of hexamethylenetetramine, and 2.5 parts of sulfur are added to the internal 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 set to 2.5 min, and the speed of the internal mixer is set to 15 r / min.

[0098] This embodiment also provides the use of the self-cleaning rubber material in preparing belts: the self-cleaning rubber material prepared as above is dissolved in toluene to obtain rubber slurry, and the obtained rubber slurry is scraped onto a canvas, and the scraped canvas obtained can be used for belt production.

[0099] Comparative Example 1

[0100] The components for preparing the self-cleaning rubber material in this comparative example 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 self-cleaning rubber material includes:

[0102] (1) First, 100 parts of carboxylated nitrile rubber, 1.1 parts of epoxidized soybean oil (epoxidation degree is 4%), 50 parts of nano-silicon dioxide, 0.2 parts of tin tetrachloride, 0.3 parts 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 mixing; in this step, the mixing temperature is set to 130° C., the mixing time is set to 10 min, and the speed of the internal mixer is set to 20 r / min;

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

[0104] The self-cleaning rubber material prepared in this comparative example is used to prepare a belt, and the specific process is still: dissolving it in toluene to obtain rubber slurry, scraping the obtained rubber slurry onto a canvas, and then the scraped canvas obtained 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, no epoxidized soybean oil is used in this comparative example.

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

[0108]

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

[0110] (1) First, 80 parts of nano-silicon dioxide and 0.2 parts of tin tetrachloride are put into an internal mixer for mixing; in this step, the mixing temperature is set to 85° C., the mixing time is set to 3.5 min, and the speed of the internal mixer is set to 15 r / min; the internal mixer is, for example, a bucket internal mixer;

[0111] (2) Then, 100 parts of carboxylated nitrile rubber and 0.3 parts of acrylic acid are added to the internal mixer and mixed with the product of step (1); in this step, the mixing temperature is set to 140° C., the mixing time is set to 4 minutes, and the speed of the internal mixer is set to 25 r / min;

[0112] (3) 30 parts of carbon black, 2 parts of stearic acid, and 3 parts of resorcinol resin are added to the internal mixer and mixed with the product of step (2); in this step, the mixing temperature is set to 120° C., the mixing time is set to 3.5 min, and the speed of the internal mixer is set to 15 r / min;

[0113] (4) Finally, 4 parts of zinc oxide, 1.5 parts of hexamethylenetetramine, and 2.5 parts of sulfur are added to the internal 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 set to 2.5 min, and the speed of the internal mixer is set to 15 r / min.

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

[0115] The components and their proportions 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 proportions 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 left for 24 hours, and vulcanized for 20 minutes at 170°C and 15 MPa using a plate vulcanizer. The mechanical properties of the self-cleaning rubber materials were tested, and the test results are shown in Table 2 below.

[0120] Table 2 Mechanical properties test results of self-cleaning rubber materials

[0121] Test items 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] The scraped rubber canvas obtained in Examples 1-5 and Comparative Examples 1-2 were used to produce belt products, and the belt products were tested on a motorcycle muddy road. Figures 3 to 14 , the road test results are as follows:

[0124] ① When the motorcycle mud and sand road test distance is 0km,

[0125] The belt products in Examples 1-5 and Comparative Examples 1-2 all have smooth surfaces and are dust-free.

[0126] ② When the motorcycle mud and sand road test distance is 500km,

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

[0128] The belt in Example 2 was slightly worn and had very little dust attached to it;

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

[0130] The belt in Example 4 was slightly worn and had very little dust attached to it;

[0131] The belt in Example 5 was slightly worn and had very little dust attached to it;

[0132] The belt in comparative example 1 was slightly worn and had a lot of dust on it;

[0133] The belt in Comparative Example 2 was more worn and had more dust attached to it.

[0134] ③ When the motorcycle mud and sand road test distance is 1500km,

[0135] The belt in Example 1 was slightly worn and had a small amount of dust on it;

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

[0137] The belt in Example 3 was slightly worn and had a small amount of dust attached to it;

[0138] The belt in Example 4 was slightly worn and had a small amount of dust attached to it;

[0139] The belt in Example 5 was slightly worn and slightly clinging to dust;

[0140] The belt in Comparative Example 1 was severely worn and had a lot of dust stuck to it;

[0141] The belt in Comparative Example 2 was severely worn and had a lot of dust stuck to it.

[0142] In summary, the self-cleaning rubber material prepared 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 rubber to produce belt products, so that the produced belt products can continue to maintain good wear resistance and self-cleaning effects as the use time increases.

[0143] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any changes, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should 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:

2. The self-cleaning rubber material according to claim 1, characterized in that: The Mooney viscosity ML (1+4min, 100°) of the carboxylated nitrile rubber is 35-50; 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. The method for preparing the self-cleaning rubber material according to any one of claims 1 to 6, characterized in that: The following steps are involved: (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, the formulated amount of zinc oxide, hexamethylenetetramine and sulfur is added into the internal mixer and mixed with the product of step (3) to obtain the self-cleaning rubber material.

8. The method for preparing the self-cleaning rubber material according to claim 7, characterized in that: 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.

9. 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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