Butyl reclaimed rubber composition and preparation method thereof

Abstract

The butyl reclaimed rubber composition comprises the following raw materials in parts by weight: 30-40 parts of butyl reclaimed rubber, 15-25 parts of butadiene rubber, 7-11 parts of a balance adjusting agent, 5-8 parts of an additive based on modified filler, 3-5 parts of carbon black, 2-3 parts of sulfur, 2-3 parts of a vulcanizing agent, 1-3 parts of stearic acid and 1-3 parts of an anti-aging agent. According to the butyl reclaimed rubber composition disclosed by the invention, the butyl reclaimed rubber is matched with the butadiene rubber, the carbon black, the sulfur, the vulcanizing agent, the stearic acid and the anti-aging agent, and the balance adjusting agent and the additive based on the modified filler are added to be blended, coordinated and synergistic, so that the obtained butyl reclaimed rubber composition has coordinated and improved mechanical properties and wear resistance; meanwhile, the product is remarkable in cold-resistant and weather-resistant stability.

Description

Technical Field

[0001] The present invention relates to the technical field of rubber compositions, and in particular to a butyl reclaimed rubber composition and a preparation method thereof. Background Art

[0002] Butyl rubber is a copolymer of polybutene and a small amount of polyisoprene. The large number of methyl groups arranged in a large scale in its molecular structure give butyl rubber the advantages of low air permeability, good thermal stability, good shock absorption performance, and ozone resistance. It is widely used in aerospace, transportation, machinery and equipment, construction engineering, and daily life.

[0003] Although the existing butyl reclaimed rubber can realize waste utilization, the mechanical properties and wear resistance of the product are poor, and it is difficult to coordinate and improve the mechanical properties and wear resistance of the product. At the same time, the product has poor cold resistance and weather resistance stability, which limits the use efficiency of the product. Based on this, the present invention further improves it. Summary of the invention

[0004] In view of the defects of the prior art, the object of the present invention is to provide a butyl reclaimed rubber composition and a preparation method thereof to solve the problems raised in the above background technology.

[0005] The present invention solves the technical problem by adopting the following technical solution:

[0006] The present invention provides a butyl reclaimed rubber composition, comprising the following raw materials in parts by weight:

[0007] 30-40 parts of butyl reclaimed rubber, 15-25 parts of butadiene rubber, 7-11 parts of balancing agent, 5-8 parts of additives based on modified fillers, 3-5 parts of carbon black, 2-3 parts of sulfur, 2-3 parts of vulcanizing agent, 1-3 parts of stearic acid, and 1-3 parts of antioxidant.

[0008] Preferably, the butyl reclaimed rubber composition comprises the following raw materials in parts by weight:

[0009] 35 parts of butyl reclaimed rubber, 20 parts of butadiene rubber, 9 parts of balancing agent, 6.5 parts of additives based on modified fillers, 4 parts of carbon black, 2.5 parts of sulfur, 2.5 parts of vulcanizing agent, 2 parts of stearic acid, and 2 parts of antioxidant.

[0010] Preferably, the vulcanizing agent is vulcanizing agent DCP; the antioxidant is antioxidant MD; and the butyl regenerated rubber is made using the technology of the existing patent 201410039988.2.

[0011] Preferably, the preparation method of the balancing agent is:

[0012] S1: The montmorillonite was first heat treated at 150-160°C for 1h, then heated to 245°C at a rate of 2-5°C / min, kept at that temperature for 30min, and finally air-cooled to room temperature;

[0013] S2: fully stirring the flake graphene and 5% by mass yttrium nitrate solution in a weight ratio of 3:7, then filtering and drying to obtain a flake graphene agent;

[0014] 2-4 parts of citric acid, 1-3 parts of flake graphene agent and 2-4 parts of silicon carbide powder are added to 6-10 parts of dopamine hydrochloride solution, and stirred thoroughly to obtain a balanced solution;

[0015] S3: immerse the montmorillonite in S1 into a balancing liquid with a volume of 3-5 times the total volume of the montmorillonite and perform ultrasonic treatment. After the immersion is completed, filter and dry to obtain a balancing agent.

[0016] Preferably, the power of the immersion ultrasonic treatment is 300-500W, and the ultrasonic time is 35-45min.

[0017] Preferably, the mass fraction of the dopamine hydrochloride solution is 2-5%.

[0018] Preferably, the preparation method of the additive based on modified filler is:

[0019] S11: adding 2-4 parts of sodium dodecylbenzene sulfonate and 1-3 parts of urea solution to 5-8 parts of lanthanum chloride solution, and then adding 2-3 parts of boron nitride agent, stirring evenly to obtain a modified solution;

[0020] The preparation method of the boron nitride agent is as follows:

[0021] Boron nitride, 5% sodium silicate solution by mass and silane coupling agent KH550 are mixed and ball-milled in a weight ratio of 3:5:1, and the ball-milling is completed to obtain a boron nitride agent;

[0022] S12: Nano zinc oxide and nano calcium carbonate are compounded in a weight ratio of 3:2, and then preheated at 65-70°C for 1 hour to obtain a composite agent, and the composite agent is added into a modification liquid of 4-7 times the total amount of the composite agent, and stirred for modification treatment. After stirring, the mixture is filtered and dried to obtain an additive based on a modified filler.

[0023] Preferably, the mass fraction of the urea solution is 2-5%; the mass fraction of the lanthanum chloride solution is 4-7%.

[0024] Preferably, the stirring speed of the stirring modification treatment is 450-550 r / min, and the stirring is for 1 hour.

[0025] The present invention also provides a method for preparing a butyl reclaimed rubber composition, comprising the following steps: weighing raw materials according to weight, mixing the raw materials in an internal mixer for 2-5 minutes at a mixing temperature of 100° C., and then vulcanizing the raw materials at a vulcanization temperature of 170-175° C., for 10-15 minutes, and at a vulcanization pressure of 10-20 MPa.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] The butyl reclaimed rubber composition of the present invention adopts butyl reclaimed rubber, butadiene rubber, carbon black, sulfur, vulcanizing agent, stearic acid and antioxidant, and a balancing agent and an additive based on a modified filler are added to blend and coordinate the two, and the obtained butyl reclaimed rubber composition has coordinated improved mechanical properties and wear resistance, and the product has significant cold resistance and weathering stability; the balancing agent adopts montmorillonite and is subjected to heat treatment to optimize its active efficiency and improve its interlamellar spacing; at the same time, graphene is treated with yttrium nitrate, and is blended with silicon carbide powder and dopamine hydrochloride solution to obtain a balancing liquid; the system structure is improved by combining the balancing liquid with montmorillonite; at the same time, the additive based on the modified filler is prepared by nano zinc oxide and nano calcium carbonate, and then combined with a modifying liquid for improvement; the modifying liquid is prepared by combining a specific boron nitride agent with specific raw materials; the obtained additive based on the modified filler and the balancing agent have a more significant synergistic effect, so that the performance of the product is further improved. DETAILED DESCRIPTION

[0028] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of 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.

[0029] A butyl reclaimed rubber composition of this embodiment includes the following raw materials in parts by weight:

[0030] 30-40 parts of butyl reclaimed rubber, 15-25 parts of butadiene rubber, 7-11 parts of balancing agent, 5-8 parts of additives based on modified fillers, 3-5 parts of carbon black, 2-3 parts of sulfur, 2-3 parts of vulcanizing agent, 1-3 parts of stearic acid, and 1-3 parts of antioxidant.

[0031] The butyl reclaimed rubber composition of this embodiment includes the following raw materials in parts by weight:

[0032] 35 parts of butyl reclaimed rubber, 20 parts of butadiene rubber, 9 parts of balancing agent, 6.5 parts of additives based on modified fillers, 4 parts of carbon black, 2.5 parts of sulfur, 2.5 parts of vulcanizing agent, 2 parts of stearic acid, and 2 parts of antioxidant.

[0033] The vulcanizing agent in this embodiment is vulcanizing agent DCP; the antioxidant is antioxidant MD; and the butyl reclaimed rubber is made using the technology of existing patent 201410039988.2.

[0034] The preparation method of the balancing agent of this embodiment is:

[0035] S1: The montmorillonite was first heat treated at 150-160°C for 1h, then heated to 245°C at a rate of 2-5°C / min, kept at that temperature for 30min, and finally air-cooled to room temperature;

[0036] S2: fully stirring the flake graphene and 5% by mass yttrium nitrate solution in a weight ratio of 3:7, then filtering and drying to obtain a flake graphene agent;

[0037] 2-4 parts of citric acid, 1-3 parts of flake graphene agent and 2-4 parts of silicon carbide powder are added to 6-10 parts of dopamine hydrochloride solution, and stirred thoroughly to obtain a balanced solution;

[0038] S3: immerse the montmorillonite in S1 into a balancing liquid with a volume of 3-5 times the total volume of the montmorillonite and perform ultrasonic treatment. After the immersion is completed, filter and dry to obtain a balancing agent.

[0039] The power of the immersion ultrasonic treatment in this embodiment is 300-500W, and the ultrasonic time is 35-45min.

[0040] The mass fraction of the dopamine hydrochloride solution in this embodiment is 2-5%.

[0041] The preparation method of the additive based on the modified filler of this embodiment is:

[0042] S11: adding 2-4 parts of sodium dodecylbenzene sulfonate and 1-3 parts of urea solution to 5-8 parts of lanthanum chloride solution, and then adding 2-3 parts of boron nitride agent, stirring evenly to obtain a modified solution;

[0043] The preparation method of the boron nitride agent is as follows:

[0044] Boron nitride, 5% sodium silicate solution by mass and silane coupling agent KH550 are mixed and ball-milled in a weight ratio of 3:5:1, and the ball-milling is completed to obtain a boron nitride agent;

[0045] S12: Nano zinc oxide and nano calcium carbonate are compounded in a weight ratio of 3:2, and then preheated at 65-70°C for 1 hour to obtain a composite agent, and the composite agent is added into a modification liquid of 4-7 times the total amount of the composite agent, and stirred for modification treatment. After stirring, the mixture is filtered and dried to obtain an additive based on a modified filler.

[0046] The mass fraction of the urea solution in this embodiment is 2-5%; the mass fraction of the lanthanum chloride solution is 4-7%.

[0047] The stirring speed of the stirring modification treatment in this embodiment is 450-550 r / min, and the stirring is for 1 hour.

[0048] A preparation method of a butyl reclaimed rubber composition of the present embodiment comprises the following steps: weighing raw materials according to weight, mixing the raw materials in an internal mixer for 2-5 minutes at a mixing temperature of 100° C., and then vulcanizing the raw materials at a vulcanization temperature of 170-175° C., for 10-15 minutes, and at a vulcanization pressure of 10-20 MPa.

[0049] Example 1.

[0050] A butyl reclaimed rubber composition of this embodiment includes the following raw materials in parts by weight:

[0051] 30 parts of butyl reclaimed rubber, 15 parts of butadiene rubber, 7 parts of balancing agent, 5 parts of additives based on modified fillers, 3 parts of carbon black, 2 parts of sulfur, 2 parts of vulcanizing agent, 1 part of stearic acid, and 1 part of antioxidant.

[0052] The vulcanizing agent in this embodiment is vulcanizing agent DCP; the antioxidant is antioxidant MD; and the butyl reclaimed rubber is made using the technology of existing patent 201410039988.2.

[0053] The preparation method of the balancing agent of this embodiment is:

[0054] S1: The montmorillonite was first heat treated at 150 °C for 1 h, then heated to 245 °C at a rate of 2 °C / min, kept at that temperature for 30 min, and finally air-cooled to room temperature;

[0055] S2: fully stirring the flake graphene and 5% by mass yttrium nitrate solution in a weight ratio of 3:7, then filtering and drying to obtain a flake graphene agent;

[0056] 2 parts of citric acid, 1 part of flake graphene agent and 2 parts of silicon carbide powder are added to 6 parts of dopamine hydrochloride solution and stirred thoroughly to obtain a balanced solution;

[0057] S3: The montmorillonite in S1 is immersed in a balancing liquid with a volume 3 times the total volume of the montmorillonite and subjected to ultrasonic treatment. After the immersion is completed, the balancing liquid is filtered and dried to obtain a balancing agent.

[0058] The power of the immersion ultrasonic treatment in this embodiment is 300 W, and the ultrasonic time is 35 min.

[0059] The mass fraction of the dopamine hydrochloride solution in this embodiment is 2%.

[0060] The preparation method of the additive based on the modified filler of this embodiment is:

[0061] S11: adding 2 parts of sodium dodecylbenzene sulfonate and 1 part of urea solution to 5 parts of lanthanum chloride solution, and then adding 2 parts of boron nitride agent, stirring evenly to obtain a modified solution;

[0062] The preparation method of the boron nitride agent is as follows:

[0063] Boron nitride, 5% sodium silicate solution by mass and silane coupling agent KH550 are mixed and ball-milled in a weight ratio of 3:5:1, and the ball-milling is completed to obtain a boron nitride agent;

[0064] S12: Nano zinc oxide and nano calcium carbonate are compounded in a weight ratio of 3:2, and then preheated at 65° C. for 1 hour to obtain a composite agent, and the composite agent is added into a modification liquid of 4 times the total amount of the composite agent, and stirred for modification treatment. After the stirring is completed, the mixture is filtered and dried to obtain an additive based on a modified filler.

[0065] The mass fraction of the urea solution in this embodiment is 2%; the mass fraction of the lanthanum chloride solution is 4%.

[0066] The stirring speed of the stirring modification treatment in this embodiment is 450 r / min, and the stirring is for 1 hour.

[0067] A preparation method of a butyl reclaimed rubber composition of the present embodiment includes the following steps: weighing raw materials according to weight parts, mixing the raw materials in an internal mixer for 2 minutes at a mixing temperature of 100° C., and then vulcanizing the raw materials at a vulcanization temperature of 170° C., for 10 minutes, and at a vulcanization pressure of 10 MPa.

[0068] Example 2.

[0069] A butyl reclaimed rubber composition of this embodiment includes the following raw materials in parts by weight:

[0070] 40 parts of butyl reclaimed rubber, 25 parts of butadiene rubber, 11 parts of balancing agent, 8 parts of additives based on modified fillers, 5 parts of carbon black, 3 parts of sulfur, 3 parts of vulcanizing agent, 3 parts of stearic acid, and 3 parts of antioxidant.

[0071] The vulcanizing agent in this embodiment is vulcanizing agent DCP; the antioxidant is antioxidant MD; and the butyl reclaimed rubber is made using the technology of existing patent 201410039988.2.

[0072] The preparation method of the balancing agent of this embodiment is:

[0073] S1: The montmorillonite was first heat treated at 160 °C for 1 h, then heated to 245 °C at a rate of 5 °C / min, kept at this temperature for 30 min, and finally air-cooled to room temperature;

[0074] S2: fully stirring the flake graphene and 5% by mass yttrium nitrate solution in a weight ratio of 3:7, then filtering and drying to obtain a flake graphene agent;

[0075] 4 parts of citric acid, 3 parts of flake graphene agent and 4 parts of silicon carbide powder are added to 10 parts of dopamine hydrochloride solution, and stirred thoroughly to obtain a balanced solution;

[0076] S3: immerse the montmorillonite in S1 into a balancing solution with a volume of 5 times the total volume of the montmorillonite and perform ultrasonic treatment. After the immersion is completed, filter and dry to obtain a balancing agent.

[0077] The power of the immersion ultrasonic treatment in this embodiment is 500 W, and the ultrasonic time is 45 min.

[0078] The mass fraction of the dopamine hydrochloride solution in this embodiment is 5%.

[0079] The preparation method of the additive based on the modified filler of this embodiment is:

[0080] S11: adding 4 parts of sodium dodecylbenzene sulfonate and 3 parts of urea solution to 8 parts of lanthanum chloride solution, and then adding 3 parts of boron nitride agent, stirring evenly to obtain a modified solution;

[0081] The preparation method of the boron nitride agent is as follows:

[0082] Boron nitride, 5% sodium silicate solution by mass and silane coupling agent KH550 are mixed and ball-milled in a weight ratio of 3:5:1, and the ball-milling is completed to obtain a boron nitride agent;

[0083] S12: Nano zinc oxide and nano calcium carbonate are compounded in a weight ratio of 3:2, and then preheated at 70° C. for 1 hour to obtain a composite agent, and the composite agent is added into a modification liquid of 7 times the total amount of the composite agent, and stirred for modification treatment. After stirring, the mixture is filtered and dried to obtain an additive based on a modified filler.

[0084] The mass fraction of the urea solution in this embodiment is 5%; the mass fraction of the lanthanum chloride solution is 7%.

[0085] The stirring speed of the stirring modification treatment in this embodiment is 550 r / min, and the stirring is for 1 hour.

[0086] A preparation method of a butyl reclaimed rubber composition of the present embodiment includes the following steps: weighing raw materials according to weight, mixing the raw materials in an internal mixer for 5 minutes at a mixing temperature of 100° C., and then vulcanizing the raw materials at a vulcanization temperature of 175° C., for 15 minutes, and at a vulcanization pressure of 20 MPa.

[0087] Example 3.

[0088] A butyl reclaimed rubber composition of this embodiment includes the following raw materials in parts by weight:

[0089] 35 parts of butyl reclaimed rubber, 20 parts of butadiene rubber, 9 parts of balancing agent, 6.5 parts of additives based on modified fillers, 4 parts of carbon black, 2.5 parts of sulfur, 2.5 parts of vulcanizing agent, 2 parts of stearic acid, and 2 parts of antioxidant.

[0090] The vulcanizing agent in this embodiment is vulcanizing agent DCP; the antioxidant is antioxidant MD; and the butyl reclaimed rubber is made using the technology of existing patent 201410039988.2.

[0091] The preparation method of the balancing agent of this embodiment is:

[0092] S1: The montmorillonite was first heat treated at 155 °C for 1 h, then heated to 245 °C at a rate of 3.5 °C / min, kept at this temperature for 30 min, and finally air-cooled to room temperature;

[0093] S2: fully stirring the flake graphene and 5% by mass yttrium nitrate solution in a weight ratio of 3:7, then filtering and drying to obtain a flake graphene agent;

[0094] 3 parts of citric acid, 2 parts of flake graphene agent and 3 parts of silicon carbide powder are added to 8 parts of dopamine hydrochloride solution and stirred thoroughly to obtain a balanced solution;

[0095] S3: immerse the montmorillonite in S1 into a balancing solution of 4 times the total amount of the montmorillonite and perform ultrasonic treatment. After the immersion is completed, filter and dry to obtain a balancing agent.

[0096] The power of the immersion ultrasonic treatment in this embodiment is 400 W, and the ultrasonic time is 40 min.

[0097] The mass fraction of the dopamine hydrochloride solution in this embodiment is 3.5%.

[0098] The preparation method of the additive based on the modified filler of this embodiment is:

[0099] S11: adding 3 parts of sodium dodecylbenzene sulfonate and 2 parts of urea solution to 6.5 parts of lanthanum chloride solution, and then adding 2.5 parts of boron nitride agent, stirring evenly to obtain a modified solution;

[0100] The preparation method of the boron nitride agent is as follows:

[0101] Boron nitride, 5% sodium silicate solution by mass and silane coupling agent KH550 are mixed and ball-milled in a weight ratio of 3:5:1, and the ball-milling is completed to obtain a boron nitride agent;

[0102] S12: Nano zinc oxide and nano calcium carbonate are compounded in a weight ratio of 3:2, and then preheated at 69° C. for 1 hour to obtain a composite agent, and the composite agent is added into a modification liquid of 5.5 times the total amount of the composite agent, and stirred for modification treatment. After stirring, the mixture is filtered and dried to obtain an additive based on a modified filler.

[0103] The mass fraction of the urea solution in this embodiment is 3.5%; the mass fraction of the lanthanum chloride solution is 5.5%.

[0104] The stirring speed of the stirring modification treatment in this embodiment is 500 r / min, and the stirring is for 1 hour.

[0105] A preparation method of a butyl reclaimed rubber composition of the present embodiment includes the following steps: weighing raw materials according to weight parts, mixing the raw materials in an internal mixer for 3.5 minutes at a mixing temperature of 100° C., and then vulcanizing the raw materials at a vulcanization temperature of 172° C., for 12.5 minutes, and at a vulcanization pressure of 15 MPa.

[0106] Example 4.

[0107] A butyl reclaimed rubber composition of this embodiment includes the following raw materials in parts by weight:

[0108] 32 parts of butyl reclaimed rubber, 17 parts of butadiene rubber, 8 parts of balancing agent, 6 parts of additives based on modified fillers, 4 parts of carbon black, 2 parts of sulfur, 3 parts of vulcanizing agent, 2 parts of stearic acid, and 2 parts of antioxidant.

[0109] The vulcanizing agent in this embodiment is vulcanizing agent DCP; the antioxidant is antioxidant MD; and the butyl reclaimed rubber is made using the technology of existing patent 201410039988.2.

[0110] The preparation method of the balancing agent of this embodiment is:

[0111] S1: The montmorillonite was first heat treated at 152 °C for 1 h, then heated to 245 °C at a rate of 3 °C / min, kept at this temperature for 30 min, and finally air-cooled to room temperature;

[0112] S2: fully stirring the flake graphene and 5% by mass yttrium nitrate solution in a weight ratio of 3:7, then filtering and drying to obtain a flake graphene agent;

[0113] 3 parts of citric acid, 2 parts of flake graphene agent and 3 parts of silicon carbide powder are added to 7 parts of dopamine hydrochloride solution, and stirred thoroughly to obtain a balanced solution;

[0114] S3: immerse the montmorillonite in S1 into a balancing solution of 4 times the total amount of the montmorillonite and perform ultrasonic treatment. After the immersion is completed, filter and dry to obtain a balancing agent.

[0115] The power of the immersion ultrasonic treatment in this embodiment is 350 W, and the ultrasonic time is 38 min.

[0116] The mass fraction of the dopamine hydrochloride solution in this embodiment is 3%.

[0117] The preparation method of the additive based on the modified filler of this embodiment is:

[0118] S11: adding 3 parts of sodium dodecylbenzene sulfonate and 2 parts of urea solution to 6 parts of lanthanum chloride solution, and then adding 2 parts of boron nitride agent, stirring evenly to obtain a modified solution;

[0119] The preparation method of the boron nitride agent is as follows:

[0120] Boron nitride, 5% sodium silicate solution by mass and silane coupling agent KH550 are mixed and ball-milled in a weight ratio of 3:5:1, and the ball-milling is completed to obtain a boron nitride agent;

[0121] S12: Nano zinc oxide and nano calcium carbonate are compounded in a weight ratio of 3:2, and then preheated at 67° C. for 1 hour to obtain a composite agent, and the composite agent is added into a modification liquid of 5 times the total amount of the composite agent, and stirred for modification treatment. After stirring, the mixture is filtered and dried to obtain an additive based on a modified filler.

[0122] The mass fraction of the urea solution in this embodiment is 3%; the mass fraction of the lanthanum chloride solution is 5%.

[0123] The stirring speed of the stirring modification treatment in this embodiment is 460 r / min, and the stirring is for 1 hour.

[0124] A preparation method of a butyl reclaimed rubber composition of the present embodiment includes the following steps: weighing raw materials according to weight, mixing the raw materials in an internal mixer for 3 minutes at a mixing temperature of 100° C., and then vulcanizing the raw materials at a vulcanization temperature of 172° C., for 12 minutes, and at a vulcanization pressure of 13 MPa.

[0125] Comparative Example 1.

[0126] The difference from Example 3 is that no balancing agent was added.

[0127] Comparative Example 2.

[0128] The difference from Example 3 is that no balancing liquid is added during the preparation of the balancing agent.

[0129] Comparative Example 3.

[0130] The difference from Example 3 is that no flake graphene agent is added in the preparation of the balancing solution.

[0131] Comparative Example 4.

[0132] The difference from Example 3 is that silicon carbide powder is not added in the preparation of the balancing solution, and water is used instead of the dopamine hydrochloride solution.

[0133] Comparative Example 5.

[0134] The difference from Example 3 is that no additive based on modified filler is added.

[0135] Comparative Example 6.

[0136] The difference from Example 3 is that no modifying liquid is added in the preparation of the additive based on the modified filler.

[0137] Comparative Example 7.

[0138] The difference from Example 3 is that no boron nitride agent is added to the modified liquid.

[0139] The performance of the products of Examples 1-4 and Comparative Examples 1-7 was routinely tested. The products were placed at -5°C for 24 hours and then subjected to 200 hours of accelerated aging under UVB light to test their cold resistance and aging resistance. The tests were as follows:

[0140]

[0141]

[0142] It can be seen from comparative examples 1-7 and Example 3 that the product of Example 3 has excellent mechanical properties and wear resistance, and at the same time, the product has excellent cold resistance and weathering resistance. The product does not add a balancing agent or one of the additives based on modified fillers, and the performance of the product deteriorates significantly. The two are used in combination, and the synergy is achieved, and the product performance effect is significant.

[0143] No balancing liquid was added in the preparation of the balancing agent, no flaky graphene agent was added in the preparation of the balancing liquid, and no silicon carbide powder was added in the preparation of the balancing liquid. The dopamine hydrochloride solution was replaced by water. No modifying liquid was added in the preparation of the additive based on the modified filler, and no boron nitride agent was added to the modifying liquid. The performance of the products all tended to deteriorate. Only the product raw material obtained by the method of the present invention had the most significant performance effect of the product. The effects of other methods were not as obvious as those of the present invention.

[0144] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention.

[0145] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A butyl reclaimed rubber composition, characterized in that: It includes the following raw materials in parts by weight: 30-40 parts of butyl reclaimed rubber, 15-25 parts of butadiene rubber, 7-11 parts of balancing agent, 5-8 parts of additives based on modified fillers, 3-5 parts of carbon black, 2-3 parts of sulfur, 2-3 parts of vulcanizing agent, 1-3 parts of stearic acid, and 1-3 parts of antioxidant.

2. A butyl reclaimed rubber composition according to claim 1, characterized in that: The butyl reclaimed rubber composition comprises the following raw materials in parts by weight: 35 parts of butyl reclaimed rubber, 20 parts of butadiene rubber, 9 parts of balancing agent, 6.5 parts of additives based on modified fillers, 4 parts of carbon black, 2.5 parts of sulfur, 2.5 parts of vulcanizing agent, 2 parts of stearic acid, and 2 parts of antioxidant.

3. A butyl reclaimed rubber composition according to claim 2, characterized in that: The vulcanizing agent is vulcanizing agent DCP; the antioxidant is antioxidant MD; and the butyl regenerated rubber is made by using the technology of the existing patent 201410039988.

2.

4. A butyl reclaimed rubber composition according to claim 1, characterized in that: The preparation method of the balancing agent is: S1: The montmorillonite was first heat treated at 150-160°C for 1h, then heated to 245°C at a rate of 2-5°C / min, kept at that temperature for 30min, and finally air-cooled to room temperature; S2: fully stirring the flake graphene and 5% by mass yttrium nitrate solution in a weight ratio of 3:7, then filtering and drying to obtain a flake graphene agent; 2-4 parts of citric acid, 1-3 parts of flake graphene agent and 2-4 parts of silicon carbide powder are added to 6-10 parts of dopamine hydrochloride solution, and stirred thoroughly to obtain a balanced solution; S3: immerse the montmorillonite in S1 into a balancing solution with a volume of 3-5 times the total volume of the montmorillonite and perform ultrasonic treatment. After the immersion is completed, filter and dry to obtain a balancing agent.

5. A butyl reclaimed rubber composition according to claim 4, characterized in that: The power of the immersion ultrasonic treatment is 300-500W, and the ultrasonic time is 35-45min.

6. A butyl reclaimed rubber composition according to claim 4, characterized in that: The mass fraction of the dopamine hydrochloride solution is 2-5%.

7. A butyl reclaimed rubber composition according to claim 1, characterized in that: The preparation method of the additive based on modified filler is: S11: adding 2-4 parts of sodium dodecylbenzene sulfonate and 1-3 parts of urea solution to 5-8 parts of lanthanum chloride solution, and then adding 2-3 parts of boron nitride agent, stirring evenly to obtain a modified solution; The preparation method of the boron nitride agent is as follows: Boron nitride, 5% sodium silicate solution by mass and silane coupling agent KH550 are mixed and ball-milled in a weight ratio of 3:5:1, and the ball-milling is completed to obtain a boron nitride agent; S12: Nano zinc oxide and nano calcium carbonate are compounded in a weight ratio of 3:2, and then preheated at 65-70°C for 1 hour to obtain a composite agent, and the composite agent is added into a modification liquid of 4-7 times the total amount of the composite agent, and stirred for modification treatment. After stirring, the mixture is filtered and dried to obtain an additive based on a modified filler.

8. A butyl reclaimed rubber composition according to claim 7, characterized in that: The mass fraction of the urea solution is 2-5%; the mass fraction of the lanthanum chloride solution is 4-7%.

9. A butyl reclaimed rubber composition according to claim 7, characterized in that: The stirring speed of the stirring modification treatment is 450-550 r / min, and the stirring is for 1 hour.

10. A method for preparing a butyl reclaimed rubber composition according to any one of claims 1 to 9, characterized in that: The method comprises the following steps: weighing raw materials according to weight, mixing the raw materials in an internal mixer for 2-5 minutes at a mixing temperature of 100° C., and then vulcanizing the raw materials at a vulcanizing temperature of 170-175° C., for 10-15 minutes, and at a vulcanizing pressure of 10-20 MPa.

Images