Formula rubber material, preparation method of rubber compound of formula rubber material and application of formula rubber material in preparation of water tire

Abstract

The invention belongs to the technical field of high polymer materials, and particularly relates to a formula rubber material, a preparation method of rubber compound of the formula rubber material and application of the formula rubber material in preparation of a water tire. The formula rubber material provided by the invention is prepared from the following raw materials in parts by mass: 50 to 100 parts of chlorinated butyl rubber, 10 to 50 parts of butyl rubber, 5 to 20 parts of zinc oxide, 1 to 2 parts of stearic acid, 1 to 4 parts of magnesium oxide, 45 to 95 parts of reinforcing filler, 2 to 5 parts of silane coupling agent, 2 to 5 parts of asphalt, 1 to 3 parts of paraffin, 2 to 5 parts of anti-aging agent and 1 to 4 parts of vulcanizing agent. The reinforcing filler comprises carbon black and graphite powder. The formula rubber material obtained by the invention is good in processability and excellent in heat resistance, the service life of a cured water tire is long, and the production cost of the tire can be remarkably reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of polymer materials, and in particular relates to a method for preparing a formulated rubber compound and a mixed rubber thereof, and an application of the same in preparing a water tire. Background Art

[0002] At present, domestic aviation tire companies still use vulcanization in vulcanization tanks when producing tires. Vulcanization in vulcanization tanks is carried out by injecting superheated water (160-170°C) into water tires. Since water tires are used under high temperature conditions for a long time, water tire rubber is required to have certain strength and elongation properties and good heat and oxygen aging resistance.

[0003] At present, the raw rubber system in the aircraft tire rubber formula is mainly made of natural rubber (NR). Although the obtained vulcanized rubber has good strength and elongation properties, its heat aging resistance is poor, which will cause cracks to appear on the surface of the aircraft tire after a period of use. Frequent repairs are required for continued use, which not only increases production costs, but also affects the appearance quality of the finished tire. Summary of the invention

[0004] The purpose of the present invention is to provide a method for preparing a formulated rubber material and a mixed rubber thereof, as well as an application of the formulated rubber material in preparing a tire. The formulated rubber material provided by the present invention has good processing performance and excellent heat resistance. The obtained tire has a long service life and significantly reduces the production cost of the tire.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

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

[0007] 50-100 parts of chlorinated butyl rubber, 10-50 parts of butyl rubber, 5-20 parts of zinc oxide, 1-2 parts of stearic acid, 1-4 parts of magnesium oxide, 45-95 parts of reinforcing filler, 2-5 parts of silane coupling agent, 2-5 parts of asphalt, 1-3 parts of paraffin, 2-5 parts of antioxidant and 1-4 parts of vulcanizing agent; the reinforcing filler includes carbon black and graphite powder.

[0008] Preferably, the carbon black includes one or more of N375 carbon black, N220 carbon black, N330 carbon black and semi-reinforcing carbon black.

[0009] Preferably, the mass ratio of the carbon black to the graphite powder is (40-80):(5-15).

[0010] Preferably, the antioxidant includes one or more of antioxidant 4010, antioxidant NBC, catechol, P-pentyl alcohol, 2,4-dimethyl-6-tert-butylphenol, antioxidant 246, antioxidant SP and antioxidant 2246.

[0011] Preferably, the vulcanizing agent includes one or more of accelerator TMTD, accelerator DM, accelerator MBT and accelerator ZDC;

[0012] The silane coupling agent includes silane coupling agent Si-69.

[0013] The present invention provides a method for preparing a rubber compound of the formula rubber material described in the above technical solution, comprising the following steps:

[0014] Chlorobutyl rubber, butyl rubber, zinc oxide, stearic acid, magnesium oxide, reinforcing filler, silane coupling agent, asphalt, paraffin, antioxidant and vulcanizing agent are mixed to obtain a mixed rubber of the formula rubber material.

[0015] Preferably, the mixing comprises the following steps:

[0016] The chlorinated butyl rubber, butyl rubber, reinforcing filler and asphalt are mixed in one stage to obtain a first-stage mixed material;

[0017] The first-stage mixed material, stearic acid, antioxidant, coupling agent and paraffin are mixed in a second stage to obtain a second-stage mixed material;

[0018] The second-stage mixed material, zinc oxide, magnesium oxide and a vulcanizing agent are mixed in three stages to obtain a mixed rubber of the formulated rubber material.

[0019] The present invention provides the use of the rubber compound of the formula described in the above technical solution or the mixed rubber of the rubber compound of the formula prepared by the preparation method described in the above technical solution in the preparation of water tires.

[0020] The present invention provides a water tire, which is obtained by molding and vulcanizing a mixed rubber of the formula rubber material described in the above technical solution or a mixed rubber of the formula rubber material prepared by the preparation method described in the above technical solution.

[0021] Preferably, the compression vulcanization conditions include: temperature of 140-145° C., time of 70-80 min, and pressure of 2.5-3 MPa.

[0022] The present invention provides a formula rubber material, comprising the following raw materials in parts by mass: 50-100 parts of chlorinated butyl rubber, 10-50 parts of butyl rubber, 5-20 parts of zinc oxide, 1-2 parts of stearic acid, 1-4 parts of magnesium oxide, 45-95 parts of reinforcing fillers, 2-5 parts of silane coupling agents, 2-5 parts of asphalt, 1-3 parts of paraffin wax, 2-5 parts of antioxidants, and 1-4 parts of vulcanizing agents; the reinforcing fillers include carbon black and graphite powder. The present invention uses heat-resistant combined chlorinated butyl rubber and butyl rubber as the main rubber, zinc oxide as the main activator to improve the heat resistance of the rubber material, and graphite powder is added to improve the processability of the rubber material, and the thermal conductivity can also be improved. Other raw materials are then compounded, and the mass ratio of each raw material is optimized. The obtained formula rubber material has good processability and excellent heat resistance. The obtained water tire has a long service life after vulcanization, and the production cost of the tire can be significantly reduced. DETAILED DESCRIPTION

[0023] The present invention provides a formulated rubber material, comprising the following raw materials in parts by weight:

[0024] 50-100 parts of chlorinated butyl rubber, 10-50 parts of butyl rubber, 5-20 parts of zinc oxide, 1-2 parts of stearic acid, 1-4 parts of magnesium oxide, 45-95 parts of reinforcing filler, 2-5 parts of silane coupling agent, 2-5 parts of asphalt, 1-3 parts of paraffin, 2-5 parts of antioxidant and 1-4 parts of vulcanizing agent; the reinforcing filler includes carbon black and graphite powder.

[0025] In the present invention, unless otherwise specified, all preparation raw materials / components are commercially available products well known to those skilled in the art.

[0026] In terms of mass parts, the raw materials for preparing the formula rubber provided by the present invention include 50 to 100 parts of chlorinated butyl rubber, preferably 50 parts, 75 parts or 90 parts.

[0027] Based on the mass fraction of the chlorinated butyl rubber, the raw materials for preparing the formula rubber provided by the present invention include 10 to 50 parts of butyl rubber, preferably 50 parts, 25 parts or 10 parts.

[0028] The invention adopts chlorinated butyl rubber and butyl rubber as the heat-resistant combined rubber main body and controls the mass ratio of the two to obtain a formulated rubber material with good heat resistance.

[0029] Based on the mass fraction of the chlorinated butyl rubber, the raw materials for preparing the formula rubber provided by the present invention include 5 to 20 parts of zinc oxide, preferably 15 parts, 5 parts, 20 parts or 10 parts.

[0030] The invention adopts zinc oxide as a main vulcanizing agent to improve the heat resistance of the rubber compound, and the obtained formula rubber compound achieves good heat resistance by controlling the mass fraction of zinc oxide.

[0031] Based on the mass fraction of the chlorinated butyl rubber, the raw materials for preparing the formula rubber provided by the present invention include 1 to 2 parts of stearic acid, preferably 2 parts.

[0032] Based on the mass fraction of the chlorinated butyl rubber, the raw materials for preparing the formula rubber provided by the present invention include 1 to 4 parts of magnesium oxide, preferably 1 part, 2 parts, 3 parts or 4 parts.

[0033] Based on the mass fraction of the chlorinated butyl rubber, the raw materials for preparing the formula rubber provided by the present invention include 45 to 95 parts of reinforcing filler, preferably 55 parts or 65 parts. In the present invention, the reinforcing filler includes carbon black and graphite powder. The carbon black preferably includes one or more of N375 carbon black, N220 carbon black, N330 carbon black and semi-reinforcing carbon black, and in the embodiment, it can be N375 carbon black. The mass ratio of the carbon black and the graphite powder is preferably (40 to 80): (5 to 15), more preferably (45 to 70): (5 to 15), further preferably (45 to 60): (5 to 15), and in the embodiment, it can be 50:5 or 50:15. The present invention not only improves the processing performance of the formula rubber by adding graphite powder and carbon black and controlling the mass ratio of the two, but also achieves good heat resistance.

[0034] Based on the mass fraction of the chlorinated butyl rubber, the raw materials for preparing the formula rubber provided by the present invention include 2 to 5 parts of silane coupling agent, preferably 3 to 4 parts. In the present invention, the silane coupling agent preferably includes silane coupling agent Si-69.

[0035] Based on the mass fraction of the chlorinated butyl rubber, the raw materials for preparing the formula rubber provided by the present invention include 2 to 5 parts of asphalt, preferably 2 to 4 parts, and more preferably 2 to 3 parts. In the present invention, the asphalt preferably includes No. 10 asphalt.

[0036] Based on the mass fraction of the chlorinated butyl rubber, the raw materials for preparing the formula rubber provided by the present invention include 1 to 3 parts of paraffin wax, preferably 2 parts.

[0037] Based on the mass fraction of the chlorinated butyl rubber, the raw materials for preparing the formula rubber provided by the present invention include 2 to 5 parts of antioxidant, preferably 2 to 4 parts, and more preferably 2 to 3 parts. In the present invention, the antioxidant preferably includes one or more of antioxidant 4010, antioxidant NBC, catechol, P-pentyl alcohol, 2,4-dimethyl-6-tert-butylphenol, antioxidant 246, antioxidant SP and antioxidant 2246, and in the embodiment, it can be antioxidant 2246.

[0038] Based on the mass fraction of the chlorinated butyl rubber, the raw materials for preparing the formula rubber provided by the present invention include 1 to 4 parts of a vulcanizing agent, preferably 1 to 3 parts, more preferably 1 to 2 parts, and in the embodiment, it can be 1.5 parts. In the present invention, the vulcanizing agent preferably includes one or more of accelerator TMTD, accelerator DM, accelerator MBT and accelerator ZDC, and more preferably includes two of accelerator TMTD, accelerator DM, accelerator MBT and accelerator ZDC, and the mass ratio of any two accelerators is preferably (0.5 to 1): (0.5 to 1). In the embodiment, it can be accelerator TMTD and accelerator MBT, and the mass ratio of accelerator TMTD and accelerator MBT can be 1:0.5.

[0039] The present invention provides a formulated rubber material, preferably comprising the following raw materials in parts by weight:

[0040] 50-100 parts of chlorinated butyl rubber, 10-50 parts of butyl rubber, 5-20 parts of zinc oxide, 1-2 parts of stearic acid, 1-4 parts of magnesium oxide, 40-80 parts of carbon black, 5-15 parts of graphite powder, 2-5 parts of silane coupling agent, 2-5 parts of asphalt, 1-3 parts of paraffin, 2-5 parts of antioxidant, 1-4 parts of vulcanizing agent. Based on the mass fraction of the chlorinated butyl rubber, the carbon black is preferably 45-70 parts, more preferably 45-60 parts, and can be 50 parts in the embodiment. Based on the mass fraction of the chlorinated butyl rubber, the graphite powder is preferably 15 parts or 5 parts.

[0041] The present invention provides a method for preparing a rubber compound of the formula rubber material described in the above technical solution, comprising the following steps:

[0042] Chlorobutyl rubber, butyl rubber, zinc oxide, stearic acid, magnesium oxide, reinforcing filler, silane coupling agent, asphalt, paraffin, antioxidant and vulcanizing agent are mixed to obtain a mixed rubber of the formula rubber material.

[0043] In the present invention, the mixing preferably comprises the following steps:

[0044] The chlorinated butyl rubber, butyl rubber, reinforcing filler and asphalt are mixed in one stage to obtain a first-stage mixed material;

[0045] The first-stage mixed material, stearic acid, antioxidant, coupling agent and paraffin are mixed in a second stage to obtain a second-stage mixed material;

[0046] The second-stage mixed material, zinc oxide, magnesium oxide and a vulcanizing agent are mixed in three stages to obtain a mixed rubber of the formula rubber material. In the present invention, the three-stage mixing is carried out in an internal mixer, the discharge temperature of the three-stage mixing is preferably 70-80° C., the internal mixer speed is preferably 25-30 rpm, and the three-stage mixing time is preferably 150-180 s.

[0047] The present invention provides the use of the rubber compound of the formula described in the above technical solution or the mixed rubber of the rubber compound of the formula prepared by the preparation method described in the above technical solution in the preparation of water tires.

[0048] In the present invention, the application is preferably: the formulated rubber material is used as a water tire formulated rubber material.

[0049] In the present invention, the water tire is used to prepare an aircraft tire.

[0050] The rubber compound provided by the present invention uses heat-resistant combined chlorinated butyl rubber and butyl rubber as the main rubber, and zinc oxide as the main vulcanizing agent to improve the heat resistance of the rubber compound; graphite powder is added to improve the processability of the rubber compound and improve the thermal conductivity. Therefore, the rubber compound provided by the present invention has good processability and excellent heat resistance.

[0051] The present invention provides a water tire, which is obtained by vulcanizing a mixed rubber of the formula rubber material described in the above technical solution through molding.

[0052] In the present invention, the compression vulcanization conditions preferably include: a temperature of 140 to 145° C., a time of 70 to 80 min, and a pressure of 2.5 to 3 MPa.

[0053] In order to further illustrate the present invention, the technical solutions provided by the present invention are described in detail below in conjunction with embodiments, but they should not be construed as limiting the protection scope of the present invention.

[0054] The asphalt used in the following examples and comparative examples is No. 10 asphalt.

[0055] Examples 1 to 6

[0056] Examples 1 to 6 provide a water tire formulation rubber material, and the raw materials and mass fractions of the formulation rubber material are shown in Table 1.

[0057] Embodiments 1 to 6 provide a method for preparing a rubber compound of a water-based rubber compound, comprising the following steps:

[0058] The raw materials for preparation are weighed according to the formula in Table 1, chlorinated butyl rubber, butyl rubber, N375 carbon black, graphite powder and asphalt are mixed in one stage, and then stearic acid, antioxidant 2246, silane coupling agent Si-69 and paraffin are added to the obtained first-stage mixed material, and mixed in two stages to obtain a second-stage mixed material;

[0059] The second-stage mixed material is mixed with zinc oxide, magnesium oxide, accelerator TMTD and accelerator MBT in three stages to obtain a mixed rubber of a water tire formula rubber material.

[0060] Embodiments 1 to 6 provide a water-based vulcanized rubber, the preparation method of which comprises the following steps:

[0061] The mixed rubber of the water tire formula rubber prepared in Examples 1 to 6 was molded and vulcanized and then the performance was tested. The vulcanization conditions were 145° C.×75 min and the pressure was 2.5 MPa to obtain vulcanized rubber. The performance of the water tire vulcanized rubber prepared in Examples 1 to 6 was tested.

[0062] Comparative Examples 1 to 3

[0063] Comparative Examples 1 to 3 provide a water tire formula rubber material, and the raw materials and mass fractions of the formula rubber material are shown in Table 1.

[0064] Comparative Example 1 provides a method for preparing a rubber compound of a water-based rubber compound, comprising the following steps:

[0065] The raw materials are weighed according to the formula in Table 1, and natural rubber, chlorinated butyl rubber, N375 carbon black, graphite powder and asphalt are mixed in one stage, and then stearic acid, antioxidant 2246, silane coupling agent Si-69 and paraffin are added to the obtained first-stage mixed material, and mixed in two stages to obtain a second-stage mixed material;

[0066] The second-stage mixed material is mixed with zinc oxide, magnesium oxide, accelerator TMTD and accelerator MBT in three stages to obtain a mixed rubber of a water tire formula rubber material.

[0067] Comparative Example 2 provides a method for preparing a rubber compound of a water-based rubber compound, comprising the following steps:

[0068] The raw materials for preparation are weighed according to the formula in Table 1, chlorinated butyl rubber, butyl rubber, N375 carbon black and asphalt are mixed in one stage, and then stearic acid, antioxidant 2246, silane coupling agent Si-69 and paraffin are added to the obtained first-stage mixed material, and mixed in two stages to obtain a second-stage mixed material;

[0069] The second-stage mixed material is mixed with zinc oxide, magnesium oxide, accelerator TMTD and accelerator MBT in three stages to obtain a mixed rubber of a water tire formula rubber material.

[0070] Comparative Example 3 provides a method for preparing a rubber compound of a water-based rubber compound, comprising the following steps:

[0071] The raw materials for preparation were weighed according to the formula in Table 1, and natural rubber, chlorinated butyl rubber, N375 carbon black, graphite powder and asphalt were mixed in one stage, and then stearic acid, antioxidant 2246, antioxidant RD, antioxidant 4020, silane coupling agent Si-69 and paraffin were added to the obtained first-stage mixed material, and then two-stage mixed was carried out to obtain a two-stage mixed material;

[0072] The second-stage mixed material is mixed with zinc oxide, magnesium oxide, accelerator TMTD and accelerator MBT in three stages to obtain a mixed rubber of a water tire formula rubber material.

[0073] Comparative Examples 1 to 3 provide a water-based vulcanized rubber, the preparation method of which comprises the following steps:

[0074] The mixed rubber of the water tire formula rubber prepared in Comparative Examples 1 to 3 was molded and vulcanized and then the performance was tested. The vulcanization conditions were 145°C×75min and the pressure was 2.5MPa to obtain vulcanized rubber. The performance of the water tire vulcanized rubber prepared in Comparative Examples 1 to 3 was tested.

[0075] Table 1 Raw material formula (mass fraction) of embodiment and comparative example

[0076]

[0077]

[0078] The test results of the water-tire vulcanizates prepared in Examples 1 to 6 and Comparative Examples 1 to 3 are shown in Table 2. From the results in Table 2, it can be seen that the water-tire vulcanizates prepared from the formula rubber materials provided in Examples 1 to 6 have good heat aging resistance and excellent comprehensive performance.

[0079] Table 2 Water tire rubber test results of the embodiments and comparative examples

[0080]

[0081] It can be seen from the above embodiments that the present invention optimizes the types and mass ratios of the raw materials for preparing the formulated rubber compound, so that the formulated rubber compound has good processing performance and excellent heat resistance. The water tire obtained after vulcanization has a long service life and can significantly reduce the production cost of the tire.

[0082] Although the above embodiment describes the present invention in detail, it is only a part of the embodiments of the present invention, not all of the embodiments. Other embodiments can be obtained based on this embodiment without creativity, and these embodiments all fall within the protection scope of the present invention.

Claims

1. A rubber compound formulation, characterized in that: The preparation comprises the following raw materials in parts by weight: 50-100 parts of chlorinated butyl rubber, 10-50 parts of butyl rubber, 5-20 parts of zinc oxide, 1-2 parts of stearic acid, 1-4 parts of magnesium oxide, 45-95 parts of reinforcing filler, 2-5 parts of silane coupling agent, 2-5 parts of asphalt, 1-3 parts of paraffin, 2-5 parts of antioxidant and 1-4 parts of vulcanizing agent; the reinforcing filler includes carbon black and graphite powder.

2. The rubber formulation according to claim 1, characterized in that: The carbon black includes one or more of N375 carbon black, N220 carbon black, N330 carbon black and semi-reinforcing carbon black.

3. The rubber formulation according to claim 1 or 2, characterized in that: The mass ratio of the carbon black to the graphite powder is (40-80):(5-15).

4. The rubber formulation according to claim 1, characterized in that: The antioxidant includes one or more of antioxidant 4010, antioxidant NBC, catechol, P-pentyl alcohol, 2,4-dimethyl-6-tert-butylphenol, antioxidant 246, antioxidant SP and antioxidant 2246.

5. The rubber formulation according to claim 1, characterized in that: The vulcanizing agent includes one or more of accelerator TMTD, accelerator DM, accelerator MBT and accelerator ZDC; The silane coupling agent includes silane coupling agent Si-69.

6. A method for preparing a rubber compound of the rubber compound according to any one of claims 1 to 5, characterized in that: The following steps are involved: Chlorobutyl rubber, butyl rubber, zinc oxide, stearic acid, magnesium oxide, reinforcing filler, silane coupling agent, asphalt, paraffin, antioxidant and vulcanizing agent are mixed to obtain a mixed rubber of the formula rubber material.

7. The preparation method according to claim 6, characterized in that: The mixing comprises the following steps: The chlorinated butyl rubber, butyl rubber, reinforcing filler and asphalt are mixed in one stage to obtain a first-stage mixed material; The first-stage mixed material, stearic acid, antioxidant, coupling agent and paraffin are mixed in a second stage to obtain a second-stage mixed material; The second-stage mixed material, zinc oxide, magnesium oxide and a vulcanizing agent are mixed in three stages to obtain a mixed rubber of the formulated rubber material.

8. Use of the rubber compound of any one of claims 1 to 5 or the rubber compound prepared by the preparation method of claim 6 or 7 in the preparation of water tires.

9. A water tire, characterized in that: The rubber compound of the rubber formula described in any one of claims 1 to 5 or the rubber compound of the rubber formula prepared by the preparation method described in claim 6 or 7 is obtained by molding and vulcanization.

10. The water tire according to claim 9, characterized in that: The compression vulcanization conditions include: a temperature of 140 to 145° C., a time of 70 to 80 minutes, and a pressure of 2.5 to 3 MPa.

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