A chloroprene rubber compound, a preparation method and application thereof, and a rubber pad

Abstract

The application belongs to the technical field of rubber, and particularly relates to a chloroprene rubber compound, a preparation method and application thereof, and a rubber pad. The chloroprene rubber compound comprises the following components in mass fractions: chloroprene rubber 40-80 parts; cis-butadiene rubber 20-60 parts; flame retardant 50-90 parts; titanium white powder 4-10 parts; reinforcing agent 42-65 parts; anti-aging agent 1-4 parts; silane coupling agent 4-16 parts; plasticizer 4-12 parts; mildew-proof agent 0.5-4 parts; vulcanizing agent 1-3 parts; activator 0.5-3 parts; accelerator 0.2-15 parts; and the flame retardant comprises flame retardant SFR-3B and aluminum hydroxide. The chloroprene rubber compound provided by the application can further improve the thermal stability of the compound on the basis of ensuring the flame retardant property.

Description

Technical Field

[0001] The invention belongs to the technical field of rubber, and in particular relates to a chloroprene rubber compound, a preparation method and application thereof, and a rubber pad. Background Art

[0002] Neoprene, also known as chloroprene rubber, is made from chloroprene (2-chloro-1,3-butadiene) through a polymerization reaction. It exhibits excellent mechanical properties and resistance to oil, heat, sunlight, ozone, acids, alkalis, and chemicals. However, chloroprene rubber has poor flame retardancy and does not meet the UL94V0 flame retardancy requirement for self-extinguishing properties, necessitating the addition of flame retardants.

[0003] Currently, traditional flame retardants include antimony trioxide, chlorinated paraffin or decabromodiphenyl ether. Although the above flame retardants can improve the flame retardant properties of chloroprene rubber, they will reduce the thermal stability of chloroprene rubber. Summary of the Invention

[0004] The purpose of the present invention is to provide a chloroprene rubber compound, a preparation method and application thereof, and a rubber pad. The chloroprene rubber compound provided by the present invention has excellent thermal stability while ensuring flame retardant properties.

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

[0006] The present invention provides a chloroprene rubber compound, which comprises the following components in parts by mass:

[0007] 40-80 parts of chloroprene rubber; 20-60 parts of butadiene rubber; 50-90 parts of flame retardant; 4-10 parts of titanium dioxide; 42-65 parts of reinforcing agent; 1-4 parts of antioxidant; 4-16 parts of silane coupling agent; 4-12 parts of plasticizer; 0.5-4 parts of mildewproof agent; 1-3 parts of vulcanizing agent; 0.5-3 parts of activator; 0.2-15 parts of accelerator;

[0008] The flame retardant includes flame retardant SFR-3B and aluminum hydroxide.

[0009] Preferably, the mass ratio of the flame retardant SFR-3B to aluminum hydroxide is 10-30:40-60.

[0010] Preferably, the reinforcing agent includes white carbon black and carbon black;

[0011] The mass ratio of white carbon black to carbon black is 40-60:2-5.

[0012] Preferably, the antioxidant includes protective wax and antioxidant MB;

[0013] The mass ratio of the protective wax to the antioxidant MB is 0.5-2:0.5-2.

[0014] Preferably, the silane coupling agent includes bis-(γ-triethoxysilylpropyl) tetrasulfide and / or γ-aminopropyltriethoxysilane;

[0015] The plasticizer includes dioctyl sebacate and / or dioctyl phthalate.

[0016] Preferably, the accelerator includes one or more of magnesium oxide, accelerator DM, accelerator D, accelerator ZDC and accelerator NS.

[0017] The present invention also provides a method for preparing the chloroprene rubber compound described in the above technical solution, comprising the following steps:

[0018] The chloroprene rubber, butadiene rubber, flame retardant, titanium dioxide, reinforcing agent, antioxidant, silane coupling agent, plasticizer, mildew inhibitor and activator are first mixed to obtain a masterbatch;

[0019] The masterbatch, the vulcanizing agent and the accelerator are mixed for the second time to obtain the chloroprene rubber compound.

[0020] Preferably, the first mixing temperature is 90-110° C. and the time is 5-10 min;

[0021] The temperature of the second mixing is 40-60° C., and the time is 5-10 minutes.

[0022] The present invention also provides the use of the chloroprene rubber compound described in the above technical solution or the chloroprene rubber compound prepared by the preparation method described in the above technical solution in the preparation of rubber for aviation.

[0023] The present invention also provides a rubber mat, comprising an appearance anti-slip layer, a fiber layer and a ground-fitting layer stacked in sequence;

[0024] The raw materials for preparing the appearance anti-slip layer and the ground bonding layer independently include the chloroprene rubber compound described in the above technical solution or the chloroprene rubber compound prepared by the preparation method described in the above technical solution.

[0025] The present invention provides a chloroprene rubber compound, comprising the following components in parts by mass: 40 to 80 parts of chloroprene rubber; 20 to 60 parts of butadiene rubber; 50 to 90 parts of flame retardant; 4 to 10 parts of titanium dioxide; 42 to 65 parts of reinforcing agent; 1 to 4 parts of antioxidant; 4 to 16 parts of silane coupling agent; 4 to 12 parts of plasticizer; 0.5 to 4 parts of mildew inhibitor; 1 to 3 parts of vulcanizing agent; 0.5 to 3 parts of activator; 0.2 to 15 parts of accelerator; the flame retardant comprises flame retardant SFR-3B and aluminum hydroxide. In the present invention, by using the new environmentally friendly flame retardant SFR-3B and titanium dioxide, ordinary rutile titanium dioxide is converted into rutile titanium dioxide at high temperature. Rutile titanium dioxide has a melting point of 1850°C and has the functions of both reinforcing and reducing high-temperature discoloration of rubber, thereby further improving the thermal stability of the compound while ensuring flame retardant properties. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 Schematic diagram of the structure of the rubber mat provided by the present invention, wherein 1-appearance anti-slip layer, 2-fiber layer, 3-ground bonding layer;

[0027] Figure 2 This is a top view of the anti-slip layer in the rubber pad provided by the present invention. DETAILED DESCRIPTION

[0028] The present invention provides a chloroprene rubber compound, which comprises the following components in parts by mass:

[0029] 40-80 parts of chloroprene rubber; 20-60 parts of butadiene rubber; 50-90 parts of flame retardant; 4-10 parts of titanium dioxide; 42-65 parts of reinforcing agent; 1-4 parts of antioxidant; 4-16 parts of silane coupling agent; 4-12 parts of plasticizer; 0.5-4 parts of mildewproof agent; 1-3 parts of vulcanizing agent; 0.5-3 parts of activator; 0.2-15 parts of accelerator;

[0030] The flame retardant includes flame retardant SFR-3B and aluminum hydroxide.

[0031] In the present invention, unless otherwise specified, all components are commercially available products well known to those skilled in the art.

[0032] In parts by mass, the chloroprene rubber compound provided by the present invention comprises 40 to 80 parts of chloroprene rubber, more preferably 45 to 75 parts, and even more preferably 50 to 70 parts. In a specific embodiment of the present invention, the chloroprene rubber is chloroprene rubber CR2322.

[0033] The chloroprene rubber compound provided by the present invention comprises 20 to 60 parts by mass of cis-1,4-dimethyl-1-propene rubber, more preferably 25 to 55 parts by mass, and even more preferably 30 to 50 parts by mass of cis-1,4-dimethyl-1-propene rubber. In a specific embodiment of the present invention, the cis-1,4-dimethyl-1-propene rubber is BR9000. In the present invention, the cis-1,4-dimethyl-1-propene rubber can effectively improve the cold resistance of the compound.

[0034] In parts by mass, the chloroprene rubber compound provided by the present invention includes 50 to 90 parts of flame retardant, more preferably 55 to 85 parts, and more preferably 60 to 80 parts. In the present invention, the flame retardant includes flame retardant SFR-3B and aluminum hydroxide. In the present invention, the mass ratio of the flame retardant SFR-3B and aluminum hydroxide is preferably 10 to 30:40 to 60, more preferably 15 to 28:45 to 58, and more preferably 18 to 25:48 to 55. In the present invention, the flame retardant can release crystal water and a large amount of non-combustible gas when thermally decomposed to achieve a flame retardant effect, ensuring that the flame retardant grade of the compound reaches UL94V0 level; at the same time, the new environmentally friendly flame retardant SFR-3B is used in combination with titanium dioxide, so that ordinary rutile titanium dioxide will be converted into rutile titanium dioxide at high temperature, and the melting point of rutile titanium dioxide is 1850°C, which has the functions of reinforcing and reducing the high-temperature discoloration of rubber, thereby improving the thermal stability of the coating.

[0035] The chloroprene rubber compound provided by the present invention includes 4 to 10 parts by weight, preferably 5 to 9 parts, and even more preferably 3 to 8 parts of titanium dioxide. In the present invention, the titanium dioxide can interact with the flame retardant SFR-3B to improve the thermal stability of the rubber and further increase the tensile strength and hardness of the rubber.

[0036] The chloroprene rubber compound provided by the present invention comprises 42 to 65 parts by mass of a reinforcing agent, preferably 45 to 62 parts, and even more preferably 48 to 60 parts. In the present invention, the reinforcing agent preferably comprises silica and carbon black. In the present invention, the silica is preferably silica VN3; the carbon black is preferably carbon black N330. In the present invention, the mass ratio of silica to carbon black is preferably 40 to 60:2 to 5, preferably 42 to 58:2 to 4, and even more preferably 45 to 55:2 to 3. In the present invention, the reinforcing agent can increase the tensile strength and hardness of the compound itself.

[0037] In parts by mass, the chloroprene rubber compound provided by the present invention includes 1 to 4 parts of an antioxidant, more preferably 1.5 to 3.5 parts, and more preferably 2 to 3 parts. In the present invention, the antioxidant preferably includes a protective wax and an antioxidant MB. In the present invention, the protective wax is preferably a protective wax RP-3. In the present invention, the mass ratio of the protective wax to the antioxidant MB is preferably 0.5 to 2:0.5 to 2, more preferably 0.8 to 1.8:0.8 to 1.8, and more preferably 1.0 to 1.5:1.0 to 1.5. In the present invention, the protective wax RP-3 can form a wax film protective layer on the surface of the compound, and the antioxidant MB can effectively prevent air aging and discoloration.

[0038] In parts by mass, the chloroprene rubber compound provided by the present invention comprises 4 to 16 parts of a silane coupling agent, more preferably 5 to 15 parts, and even more preferably 6 to 14 parts. In the present invention, the silane coupling agent preferably comprises bis-(γ-triethoxysilylpropyl) tetrasulfide and / or γ-aminopropyltriethoxysilane. In the present invention, the bis-(γ-triethoxysilylpropyl) tetrasulfide is preferably bis-(γ-triethoxysilylpropyl) tetrasulfide Si-69 produced by Degussa, Germany. In the present invention, when the silane coupling agent is preferably bis-(γ-triethoxysilylpropyl) tetrasulfide and γ-aminopropyltriethoxysilane, the mass ratio of the bis-(γ-triethoxysilylpropyl) tetrasulfide to γ-aminopropyltriethoxysilane is preferably 4 to 8:4 to 8, more preferably 5 to 7:5 to 7. In the present invention, the silane coupling agent can well connect the reinforcing agent and the rubber.

[0039] In parts by mass, the chloroprene rubber compound provided by the present invention includes 4 to 12 parts of plasticizer, more preferably 5 to 11 parts, and more preferably 6 to 10 parts. In the present invention, the plasticizer preferably includes dioctyl sebacate (DOS) and / or dioctyl phthalate (DOP). In the present invention, when the plasticizer preferably includes dioctyl sebacate and dioctyl phthalate, the mass ratio of dioctyl sebacate and dioctyl phthalate is preferably 4 to 6:4 to 6. In the present invention, the plasticizer can reduce the interaction force between rubber molecules, improve the plasticity and fluidity of rubber, and improve the processing technology of rubber.

[0040] In parts by mass, the chloroprene rubber compound provided by the present invention includes 0.5 to 4 parts of a mildew preventer, more preferably 1 to 3.5 parts, and more preferably 1.5 to 3 parts. In the present invention, the mildew preventer preferably includes the compound mildew preventer (M325) produced by Shanghai Maiken Biotechnology Co., Ltd. and / or the compound mildew preventer (LF-106) produced by Foshan Lanfeng Additive Co., Ltd. In the present invention, when the mildew preventer is preferably the compound mildew preventer (M325) and the compound mildew preventer (LF-106), the mass ratio of the compound mildew preventer (M325) and the compound mildew preventer (LF-106) is preferably 0.5 to 2: 0.5 to 2, more preferably 1 to 1.5: 1 to 1.5. In the present invention, the mildew preventer can effectively kill spores or prevent them from germinating to achieve a mildew-proof effect.

[0041] The chloroprene rubber compound provided by the present invention includes 1 to 3 parts by weight of a vulcanizing agent, more preferably 1.5 to 2.5 parts, and even more preferably 1.8 to 2.0 parts. In the present invention, the vulcanizing agent preferably includes sulfur. In the present invention, the vulcanizing agent can accelerate the vulcanization rate of the rubber and prolong the scorch time of the rubber.

[0042] The chloroprene rubber compound provided herein includes 0.5 to 3 parts by weight of an activator, preferably 1 to 2.5 parts, and even more preferably 1.5 to 2 parts. In the present invention, the activator preferably includes stearic acid and / or zinc oxide. In the present invention, the activator can increase the crosslink density and aging resistance of the vulcanized rubber.

[0043] In parts by mass, the chloroprene rubber compound provided by the present invention includes 0.2 to 15 parts of accelerator, more preferably 0.5 to 14 parts, and more preferably 1 to 13 parts. In the present invention, the accelerator preferably includes one or more of magnesium oxide, accelerator DM, accelerator D, accelerator ZDC and accelerator NS. In the present invention, when the accelerator is magnesium oxide, the mass fraction of the magnesium oxide is preferably 1 to 5 parts; when the accelerator is accelerator DM, the mass fraction of the accelerator DM is preferably 0.5 to 2 parts; when the accelerator is accelerator D, the mass fraction of the accelerator D is preferably 0.5 to 2 parts; when the accelerator is accelerator ZDC, the mass fraction of the accelerator ZDC is preferably 0.5 to 2 parts; when the accelerator is NS, the mass fraction of the accelerator NS is preferably 0.2 to 2 parts. In the present invention, when the accelerators are magnesium oxide, accelerator DM, and accelerator NS, the mass ratio of the magnesium oxide, accelerator DM, and accelerator NS is preferably 1-5: 0.5-2: 0.5-2. In the present invention, when the accelerators are magnesium oxide, accelerator DM, accelerator D, accelerator ZDC, and accelerator NS, the mass ratio of the magnesium oxide, accelerator DM, accelerator D, accelerator ZDC, and accelerator NS is preferably 1-5: 0.5-2: 0.5-2: 0.5-2: 0.2-2. In the present invention, the accelerators can shorten the vulcanization time and reduce the vulcanization temperature.

[0044] The present invention also provides a method for preparing the chloroprene rubber compound described in the above technical solution, comprising the following steps:

[0045] The chloroprene rubber, butadiene rubber, flame retardant, titanium dioxide, reinforcing agent, antioxidant, silane coupling agent, plasticizer, mildew inhibitor and activator are first mixed to obtain a masterbatch;

[0046] The masterbatch, the vulcanizing agent and the accelerator are mixed for the second time to obtain the chloroprene rubber compound.

[0047] The invention performs a first mixing process on chloroprene rubber, butadiene rubber, flame retardant, titanium dioxide, reinforcing agent, antioxidant, silane coupling agent, plasticizer, mildew inhibitor and activator to obtain a masterbatch.

[0048] In the present invention, the temperature of the first mixing is preferably 90-110°C, more preferably 95-100°C; the time is preferably 5-10 minutes, more preferably 6-9 minutes, and more preferably 7-8 minutes. In the present invention, the rotation speed of the first mixing is preferably 30-60 rpm.

[0049] In the present invention, the first mixing preferably includes:

[0050] The chloroprene rubber and the butadiene rubber are mixed in a first stage to obtain a first-stage material;

[0051] The primary material is mixed with titanium dioxide, a reinforcing agent, a silane coupling agent, and a plasticizer in a secondary process to obtain a secondary material;

[0052] The secondary material, the mildew inhibitor, the anti-aging agent, the flame retardant and the activator are mixed in three stages.

[0053] In the present invention, the time of the first-stage mixing is preferably 60 to 100 seconds; the time of the second-stage mixing is preferably 150 to 180 seconds; and the time of the third-stage mixing is preferably 240 to 300 seconds.

[0054] In the present invention, the first mixing is preferably performed in an internal mixer.

[0055] After the primary mixing, the present invention further preferably includes debinding the resulting material. In the present invention, the debinding temperature is preferably below 120°C. The present invention has no particular limitation on the debinding process, and any method known to those skilled in the art can be used.

[0056] After obtaining the masterbatch, the present invention performs a second mixing process on the masterbatch, a vulcanizing agent, and an accelerator to obtain the chloroprene rubber compound.

[0057] In the present invention, the second kneading temperature is preferably 40-60°C, more preferably 45-50°C, the time is preferably 2-4 minutes, more preferably 2-3 minutes, and the rotation speed of the second kneading is preferably 20-40 rpm.

[0058] In the present invention, the second mixing is preferably performed in an open mill.

[0059] In the present invention, the second mixing preferably includes:

[0060] The masterbatch is subjected to a stage of mixing to obtain a stage of material;

[0061] The first stage material, the vulcanizing agent and the accelerator are mixed in two stages.

[0062] In the present invention, the roller spacing during the first stage of mixing is preferably 0.2 to 0.5 mm. In the present invention, the mixing time during the first stage is preferably 1 to 2 minutes. In the present invention, the mixing during the first stage is preferably carried out under cooling water. In the present invention, the number of roller passes during the first stage of mixing is preferably 5. In the present invention, the temperature of the material during the first stage is preferably 40 to 50°C.

[0063] In the present invention, the roller distance during the second-stage kneading is preferably 1 to 2 mm, more preferably 1.2 to 1.5 mm. In the present invention, the time for the second-stage kneading is preferably 1 to 2 minutes.

[0064] The present invention also provides the use of the chloroprene rubber compound described in the above technical solution or the chloroprene rubber compound prepared by the preparation method described in the above technical solution in rubber for aviation. The present invention does not particularly limit the specific implementation of the application, and the application can be carried out using a process well known to those skilled in the art.

[0065] The present invention also provides a rubber mat, comprising an appearance anti-slip layer, a fiber layer and a ground-fitting layer stacked in sequence;

[0066] The raw materials for preparing the appearance anti-slip layer and the ground bonding layer independently include the chloroprene rubber compound described in the above technical solution or the chloroprene rubber compound prepared by the preparation method described in the above technical solution.

[0067] In the present invention, the structural diagram of the rubber pad is as follows Figure 1 As shown, 1 is the appearance anti-slip layer, 2 is the fiber layer, and 3 is the ground bonding layer.

[0068] In the present invention, one side of the appearance anti-slip layer is preferably provided with a plurality of protrusions. In the present invention, the surface of the protrusion is preferably provided with irregular lines. In the present invention, the shape of the protrusion is preferably circular, square or diamond-shaped. In the present invention, the height of the protrusion is preferably 0.35 to 0.5 mm. In the present invention, when the shape of the protrusion is circular, the diameter of a single protrusion is preferably 10 mm; the distance between the centers of two adjacent protrusions is preferably 15 mm; the distance between the center of the protrusion in the outermost row and the edge of the appearance anti-slip pad is preferably 10 mm. In the present invention, when the shape of the protrusion is circular, the top view of the appearance anti-slip pad is as follows Figure 2 shown.

[0069] In the present invention, the thickness of the exterior anti-slip layer is preferably 1.0 to 1.5 mm; the thickness of the fiber layer is preferably 0.15 to 0.3 mm; and the thickness of the floor-conforming layer is preferably 1.0 to 1.5 mm.

[0070] In the present invention, the fibers in the fiber layer preferably include one or more of glass fibers, polyester fibers and nylon fibers.

[0071] The present invention has no particular limitation on the preparation method of the rubber pad, and the rubber pad can be prepared using a process well known to those skilled in the art.

[0072] To further illustrate the present invention, a chloroprene rubber compound, a preparation method and application thereof, and a rubber pad provided by the present invention are described in detail below with reference to the accompanying drawings and examples, but they should not be construed as limiting the scope of protection of the present invention.

[0073] Examples 1-2 and Comparative Examples 1-3

[0074] Prepare the materials according to the raw material ratio in Table 1;

[0075] Preparation method:

[0076] The first mixing was performed using an internal mixer, with the speed of the internal mixer set to 50 rpm and the temperature to 90°C;

[0077] Put the chloroprene rubber and butadiene rubber into an internal mixer and perform primary mixing for 90 seconds to obtain a primary material;

[0078] Add titanium dioxide, reinforcing agent, silane coupling agent and plasticizer for secondary mixing for 150 seconds to obtain secondary material;

[0079] Add mildew inhibitor, anti-aging agent, flame retardant and activator and perform three-stage mixing for 240 seconds, then perform binder removal (draining temperature is 100°C) to obtain masterbatch;

[0080] The second mixing was performed using an open mill, with the speed of the open mill set to 30 rpm and the temperature to 40°C;

[0081] Place the masterbatch in an open mill, set the roller distance to 0.2 mm, turn on the cooling water, and perform a mixing step for 120 seconds. After the masterbatch passes through the rollers 5 times, a material with a temperature of 40-50°C is obtained.

[0082] The roller spacing was adjusted to 1.5 mm, and a vulcanizing agent and an accelerator were added to perform two-stage mixing for 120 seconds to obtain the chloroprene rubber compound;

[0083] Table 1 Raw material ratios of Examples 1 to 2 and Comparative Examples 1 to 3

[0084]

[0085]

[0086] The performance tests were carried out on the rubber materials obtained in Examples 1 to 2 and Comparative Examples 1 to 3:

[0087] Among them, hardness is carried out in accordance with GB / T 528-2009;

[0088] Tensile strength is carried out in accordance with GB / T 528-2009;

[0089] Elongation at break is carried out in accordance with GB / T 528-2009;

[0090] Ozone aging performance is carried out in accordance with GB / T 7762-2014;

[0091] Low temperature brittleness is carried out in accordance with GB / T 1682-2014;

[0092] Flame retardancy is carried out in accordance with GB / T 10707-2014;

[0093] The anti-mildew grade is in accordance with HGT / 4301-2012;

[0094] Thermal stability is carried out in accordance with GB / T 3512-2014;

[0095] The test results are shown in Table 2;

[0096] Table 2 Performance test results of the rubber materials obtained in Examples 1 to 2 and Comparative Examples 1 to 3

[0097]

[0098]

[0099] As can be seen from Table 2, the rubber compound improved by the present invention has excellent thermal stability.

[0100] Although the above embodiment provides a detailed description of the present invention, 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 scope of protection of the present invention.

Claims

1. A chloroprene rubber compound, characterized in that: In parts by mass, the components are: 40-80 parts of chloroprene rubber; 20-60 parts of butadiene rubber; 50-90 parts of flame retardant; 4-10 parts of titanium dioxide; 42-65 parts of reinforcing agent; 1-4 parts of antioxidant; 4-16 parts of silane coupling agent; 4-12 parts of plasticizer; 0.5-4 parts of mildew inhibitor; 1-3 parts of vulcanizing agent; 0.5-3 parts of activator; 0.2-15 parts of accelerator; The antioxidants are protective wax and antioxidant MB; The plasticizer is dioctyl sebacate and / or dioctyl phthalate; The flame retardant is flame retardant SFR-3B and aluminum hydroxide; the mass ratio of the flame retardant SFR-3B to aluminum hydroxide is 10-30:40-60; The reinforcing agent is white carbon black and carbon black; the mass ratio of the white carbon black to the carbon black is 40-60:2-5.

2. The chloroprene rubber compound according to claim 1, characterized in that The mass ratio of the protective wax to the antioxidant MB is 0.5-2:0.5-2.

3. The chloroprene rubber compound according to claim 1, characterized in that: The silane coupling agent includes bis-(γ-triethoxysilylpropyl) tetrasulfide and / or γ-aminopropyltriethoxysilane.

4. The chloroprene rubber compound according to claim 1, characterized in that: The accelerator includes one or more of magnesium oxide, accelerator DM, accelerator D, accelerator ZDC and accelerator NS.

5. The method for preparing the chloroprene rubber compound according to any one of claims 1 to 4, wherein: The following steps are involved: The chloroprene rubber, butadiene rubber, flame retardant, titanium dioxide, reinforcing agent, antioxidant, silane coupling agent, plasticizer, mildew inhibitor and activator are first mixed to obtain a masterbatch; The masterbatch, the vulcanizing agent and the accelerator are mixed for the second time to obtain the chloroprene rubber compound.

6. The preparation method according to claim 5, characterized in that The first mixing temperature is 90-110° C. and the time is 5-10 min; The second mixing is performed at a temperature of 40-60° C. and for a time of 2-4 minutes.

7. Use of the chloroprene rubber compound according to any one of claims 1 to 4 or the chloroprene rubber compound prepared by the preparation method according to any one of claims 5 to 6 in rubber for aviation use.

8. A rubber pad, characterized in that: It includes an appearance anti-slip layer, a fiber layer and a ground bonding layer stacked in sequence; The raw materials for preparing the appearance anti-slip layer and the ground adhesion layer independently include the chloroprene rubber compound described in any one of claims 1 to 4 or the chloroprene rubber compound prepared by the preparation method described in any one of claims 5 to 6.

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