Isobutyl rubber damping material and preparation method thereof

Abstract

The invention relates to the technical field of rubber materials, in particular to an isobutyl rubber damping material and a preparation method thereof, and the isobutyl rubber damping material comprises the following components: isobutyl rubber, polyethylene resin, methyl vinyl silicone rubber, a reinforcing agent, a damping filler, an anti-aging agent, a processing aid, a softening agent, a vulcanization cross-linking agent and a vulcanizing agent. The preparation method of the isobutyl rubber damping material comprises the following steps: S1, raw rubber plastication; s2, rubber material mixing; s3, cooling and mixing; and S4, discharging the sheet. Through the processes of raw rubber plastication, rubber material mixing, cooling mixing and sheet discharging, the uniformity and compactness of the internal structure of the material are ensured, the adhesive force between the material and a metal base material is further enhanced, the good adhesiveness not only simplifies the installation process of a damping system on a metal part, but also improves the production efficiency of the damping system. And the problem of performance reduction caused by interface debonding is reduced, and the method has wide popularization and application prospects in pan-tilt damping systems and other fields needing efficient shock absorption and noise reduction.

Description

Technical Field

[0001] The invention relates to the technical field of rubber materials, in particular to a butyl rubber damping material and a preparation method thereof. Background Art

[0002] Isobutyl rubber has excellent damping performance, low air permeability, and good heat and aging resistance. Its glass transition temperature is low (-70°C), which makes its damping temperature range quite wide, and it can maintain a good damping effect from low temperature to room temperature or even higher temperature range. In addition, isobutyl rubber also has good shock absorption and chemical resistance, making it an ideal material in the field of damping and shock absorption, and can be used in pan / tilt damping systems.

[0003] In the gimbal damping system, isobutyl rubber may need to be used in combination with other materials. However, isobutyl rubber has poor adhesion to metal, which increases the manufacturing difficulty and installation cost of the gimbal damping system. Summary of the invention

[0004] The object of the present invention is to provide a butyl rubber damping material and a preparation method thereof to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: an isobutyl rubber damping material, the isobutyl rubber damping material comprising the following components in parts by weight: 100 parts of isobutyl rubber, 5-10 parts of polyethylene resin, 5-10 parts of methyl vinyl silicone rubber, 15-30 parts of reinforcing agent, 5-15 parts of damping filler, 0.5-3 parts of antioxidant, 0.5-5 parts of processing aid, 5-30 parts of softener, 0.5-3 parts of vulcanization crosslinking agent, and 0.5-3 parts of vulcanizing agent;

[0006] The damping filler is nano acrylate and nano calcium carbonate, the mass ratio of the nano acrylate to the nano calcium carbonate is 2:1, the vulcanization cross-linking agent is one or a combination of low molecular weight vinyl polybutadiene co-cross-linking agent, Diak No. 1, BIPB, the low molecular weight vinyl polybutadiene co-cross-linking agent is Ricon 153D or Ricon 154D; the vulcanizing agent is PERKADOX 14-40B-GR-S.

[0007] The preparation method of the butyl rubber damping material comprises the following steps:

[0008] S1. Raw rubber plasticizing: set the roller temperature of the internal mixer to 145-150°C, the roller speed of the internal mixer to 40-50rpm, put the isobutyl rubber, polyethylene resin and methyl vinyl silicone rubber into the internal mixer for breaking and kneading for 180-200s;

[0009] S2. Mixing rubber materials: Add reinforcing agent, antioxidant, processing aid and softener into the internal mixer in sequence, mix and knead for 15 to 18 minutes, and lift the hammer to clean;

[0010] S3, cooling and mixing: first set the roller temperature of the internal mixer to 120-125°C, add damping filler into the internal mixer, lift the hammer to clean for 20-40 seconds, then set the roller temperature of the internal mixer to 100-110°C, add vulcanizing crosslinking agent and vulcanizing agent into the internal mixer, knead for 60-100 seconds, discharge the material, and obtain the mixed rubber material;

[0011] S4, sheeting: firstly, the mixed rubber material is put into an open mixer for refining at 90-100° C. for 5-8 minutes, then filtered, and finally put into a tablet press for calendering to obtain the isobutyl rubber damping material.

[0012] Optionally, the content of vinyl acetate in the polyethylene resin is 4% to 5%.

[0013] Optionally, the vinyl content of the methyl vinyl silicone rubber is 0.1% to 0.24%.

[0014] Optionally, the reinforcing agent is paraffin oil.

[0015] Optionally, the antioxidant is antioxidant MB.

[0016] Optionally, the processing aid is a homogenizer A78.

[0017] Optionally, the softener is any one of dibutyl phthalate, dioctyl phthalate, tricresyl phosphate, dioctyl sebacate, and dioctyl adipate.

[0018] Compared with the prior art, the present invention has the following beneficial effects: the present invention is mainly composed of base materials such as isobutyl rubber, polyethylene resin, methyl vinyl silicone rubber, etc., combined with reinforcing agent, nano acrylate and nano calcium carbonate as damping fillers, as well as antioxidant, processing aid, softener, etc., and is prepared by raw rubber plasticizing, rubber mixing, temperature reduction mixing and sheeting process to ensure the uniformity and density of the internal structure of the material, and further enhance its adhesion to the metal substrate. This good adhesion not only simplifies the installation process of the damping system on the metal parts, but also reduces the performance degradation problem caused by interface debonding, and has broad promotion and application prospects in pan-tilt damping systems and other fields requiring efficient shock absorption and noise reduction. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention are described clearly and completely below. 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.

[0020] Embodiment 1: The present invention provides an isobutyl rubber damping material, which comprises the following components in parts by weight: 100 parts of isobutyl rubber, 5 parts of polyethylene resin, 5 parts of methyl vinyl silicone rubber, 15 parts of reinforcing agent, 5 parts of damping filler, 0.5 parts of antioxidant, 0.5 parts of processing aid, 5 parts of softener, 0.5 parts of vulcanization crosslinking agent, and 0.5 parts of vulcanizing agent;

[0021] The damping filler is nano-acrylate and nano-calcium carbonate, the mass ratio of nano-acrylate to nano-calcium carbonate is 2:1, the vulcanizing cross-linking agent is Ricon153D, and the vulcanizing agent is PERKADOX 14-40B-GR-S.

[0022] The preparation method of butyl rubber damping material comprises the following steps:

[0023] S1. Raw rubber plasticizing: set the roller temperature of the internal mixer to 145°C and the roller speed of the internal mixer to 40 rpm, put the isobutyl rubber, polyethylene resin and methyl vinyl silicone rubber into the internal mixer for breaking and kneading for 180 seconds;

[0024] S2. Mixing rubber materials: Add reinforcing agent, antioxidant, processing aid and softener into the internal mixer in sequence, mix and knead for 15 minutes, and lift the hammer to clean;

[0025] S3, cooling and mixing: first set the roller temperature of the internal mixer to 120°C, add damping filler into the internal mixer, lift the hammer to clean for 20 seconds, then set the roller temperature of the internal mixer to 100°C, add vulcanizing crosslinking agent and vulcanizing agent into the internal mixer, knead for 60 seconds, discharge the material, and obtain the mixed rubber material;

[0026] S4, sheeting: first put the mixed rubber material into an open mixer for refining at 90°C for 5 minutes, then filter it, and finally put it into a tablet press for calendering to obtain isobutyl rubber damping material.

[0027] Embodiment 2: The present invention provides an isobutyl rubber damping material, which comprises the following components in parts by weight: 100 parts of isobutyl rubber, 6 parts of polyethylene resin, 6 parts of methyl vinyl silicone rubber, 18 parts of reinforcing agent, 8 parts of damping filler, 1 part of antioxidant, 2 parts of processing aid, 10 parts of softener, 1 part of vulcanization crosslinking agent, and 1 part of vulcanizing agent;

[0028] The damping filler is nano-acrylate and nano-calcium carbonate, the mass ratio of nano-acrylate to nano-calcium carbonate is 2:1, the vulcanizing cross-linking agent is Ricon154D, and the vulcanizing agent is PERKADOX 14-40B-GR-S.

[0029] The preparation method of butyl rubber damping material comprises the following steps:

[0030] S1. Raw rubber plasticizing: set the roller temperature of the internal mixer to 146°C and the roller speed of the internal mixer to 44 rpm, put the isobutyl rubber, polyethylene resin and methyl vinyl silicone rubber into the internal mixer for breaking and kneading for 185 seconds;

[0031] S2. Mixing rubber materials: Add reinforcing agent, antioxidant, processing aid and softener into the internal mixer in sequence, mix and knead for 16 minutes, and lift the hammer to clean;

[0032] S3, cooling and mixing: first set the roller temperature of the internal mixer to 121°C, add the damping filler into the internal mixer, lift the hammer to clean for 25 seconds, then set the roller temperature of the internal mixer to 103°C, add the vulcanizing crosslinking agent and the vulcanizing agent into the internal mixer, knead for 70 seconds, discharge the material, and obtain the mixed rubber material;

[0033] S4, sheeting: firstly put the mixed rubber material into an open mixer for refining at 93°C for 6 minutes, then filter it, and finally put it into a tablet press for calendering to obtain isobutyl rubber damping material.

[0034] Embodiment 3: The present invention provides an isobutyl rubber damping material, which comprises the following components in parts by weight: 100 parts of isobutyl rubber, 7 parts of polyethylene resin, 7 parts of methyl vinyl silicone rubber, 20 parts of reinforcing agent, 10 parts of damping filler, 2 parts of antioxidant, 3 parts of processing aid, 18 parts of softener, 2 parts of vulcanization crosslinking agent, and 2 parts of vulcanizing agent;

[0035] The damping filler is nano-acrylate and nano-calcium carbonate, the mass ratio of nano-acrylate to nano-calcium carbonate is 2:1, the vulcanizing cross-linking agent is Diak No.1, and the vulcanizing agent is PERKADOX 14-40B-GR-S.

[0036] The preparation method of butyl rubber damping material comprises the following steps:

[0037] S1. Raw rubber plasticizing: set the roller temperature of the internal mixer to 148°C and the roller speed of the internal mixer to 46 rpm, put the isobutyl rubber, polyethylene resin and methyl vinyl silicone rubber into the internal mixer for breaking and kneading for 190 seconds;

[0038] S2. Mixing rubber materials: Add reinforcing agent, antioxidant, processing aid and softener into the internal mixer in sequence, mix and knead for 16 minutes, and lift the hammer to clean;

[0039] S3, cooling and mixing: first set the roller temperature of the internal mixer to 123°C, add damping filler into the internal mixer, lift the hammer to clean for 30 seconds, then set the roller temperature of the internal mixer to 106°C, add vulcanizing crosslinking agent and vulcanizing agent into the internal mixer, knead for 80 seconds, discharge the material, and obtain the mixed rubber material;

[0040] S4, sheeting: firstly put the mixed rubber material into an open mixer for refining at 96°C for 6 minutes, then filter it, and finally put it into a tablet press for calendering to obtain the isobutyl rubber damping material.

[0041] Embodiment 4: The present invention provides an isobutyl rubber damping material, which comprises the following components in parts by weight: 100 parts of isobutyl rubber, 9 parts of polyethylene resin, 9 parts of methyl vinyl silicone rubber, 25 parts of reinforcing agent, 12 parts of damping filler, 2.5 parts of antioxidant, 4 parts of processing aid, 25 parts of softener, 2.5 parts of vulcanizing crosslinking agent, and 2.5 parts of vulcanizing agent;

[0042] The damping filler is nano-acrylate and nano-calcium carbonate, the mass ratio of nano-acrylate to nano-calcium carbonate is 2:1, the vulcanizing cross-linking agent is BIPB, and the vulcanizing agent is PERKADOX 14-40B-GR-S.

[0043] The preparation method of butyl rubber damping material comprises the following steps:

[0044] S1. Raw rubber plasticizing: set the roller temperature of the internal mixer to 149°C and the roller speed of the internal mixer to 48 rpm, put the isobutyl rubber, polyethylene resin and methyl vinyl silicone rubber into the internal mixer for breaking and kneading for 195 seconds;

[0045] S2. Mixing rubber materials: Add reinforcing agent, antioxidant, processing aid and softener into the internal mixer in sequence, mix and knead for 17 minutes, and lift the hammer to clean;

[0046] S3, cooling and mixing: first set the roller temperature of the internal mixer to 124°C, add damping filler into the internal mixer, lift the hammer to clean for 35 seconds, then set the roller temperature of the internal mixer to 108°C, add vulcanizing crosslinking agent and vulcanizing agent into the internal mixer, knead for 90 seconds, discharge the material, and obtain the mixed rubber material;

[0047] S4, sheeting: firstly put the mixed rubber material into an open mixer for refining at 98°C for 7 minutes, then filter it, and finally put it into a tablet press for calendering to obtain the isobutyl rubber damping material.

[0048] Embodiment 5: The present invention provides an isobutyl rubber damping material, which comprises the following components in parts by weight: 100 parts of isobutyl rubber, 10 parts of polyethylene resin, 5-10 parts of methyl vinyl silicone rubber, 30 parts of reinforcing agent, 15 parts of damping filler, 3 parts of antioxidant, 5 parts of processing aid, 30 parts of softener, 3 parts of vulcanization crosslinking agent, and 3 parts of vulcanizing agent;

[0049] Among them, the damping filler is nano acrylate and nano calcium carbonate, the mass ratio of nano acrylate and nano calcium carbonate is 2:1, the vulcanizing cross-linking agent is a combination of Ricon153D, Ricon154D, Diak No.1, and BIPB, the mass ratio of Ricon153D, Ricon154D, Diak No.1, and BIPB is 2:2:1:1, and the vulcanizing agent is PERKADOX 14-40B-GR-S.

[0050] The preparation method of butyl rubber damping material comprises the following steps:

[0051] S1. Raw rubber plasticizing: set the roller temperature of the internal mixer to 150°C and the roller speed of the internal mixer to 50 rpm, put the isobutyl rubber, polyethylene resin and methyl vinyl silicone rubber into the internal mixer for breaking and kneading for 200 seconds;

[0052] S2. Mixing rubber materials: Add reinforcing agent, antioxidant, processing aid and softener into the internal mixer in sequence, mix and knead for 18 minutes, and lift the hammer to clean;

[0053] S3, cooling and mixing: first set the roller temperature of the internal mixer to 125°C, add damping filler into the internal mixer, lift the hammer to clean for 40 seconds, then set the roller temperature of the internal mixer to 110°C, add vulcanizing crosslinking agent and vulcanizing agent into the internal mixer, knead for 100 seconds, discharge the material, and obtain the mixed rubber material;

[0054] S4, sheeting: firstly put the mixed rubber material into an open mixer for refining at 100°C for 8 minutes, then filter it, and finally put it into a tablet press for calendering to obtain the isobutyl rubber damping material.

[0055] In Examples 1 to 5, the content of vinyl acetate in the polyethylene resin is 4% to 5%. The vinyl content of the methyl vinyl silicone rubber is 0.1% to 0.24%. The reinforcing agent is paraffin oil. The antioxidant is antioxidant MB. The processing aid is homogenizer A78. The softeners in Examples 1 to 5 are dibutyl phthalate, dioctyl phthalate, tricresyl phosphate, dioctyl sebacate, and dioctyl adipate.

[0056] Test example

[0057] Test content: The isobutyl rubber damping material prepared in Examples 1 to 5 was used as the experimental group, and the isobutyl rubber produced by MISUMI and model RMRMF was used as the control group. The experimental group and the control group were cut into samples with a length of 350 mm, a width of 25 mm, and a thickness of 2 mm. According to the test method disclosed in "180° Peel Test of Vulcanized Rubber and Metal Adhesion" (GB / T 15254-2014), the peel strength test was performed on the experimental group and the control group respectively, and the test results were recorded in Table 1. The metal plate used in this test is 45# steel, and the adhesive is CH238.

[0058] Table 1

[0059] Peel strength kN / m Control group 7.0 Example 1 10.7 Example 2 10.8 Example 3 11.4 Example 4 12.8 Example 5 14.6

[0060] It can be seen from Table 1 that the peel strength of the 180° peel test between the isobutyl rubber damping materials prepared in Examples 1 to 5 and No. 45 steel is greater than 10 kN / m, indicating that the isobutyl rubber damping material prepared in the present invention has good adhesion to metal, can reduce the manufacturing difficulty and installation cost of the pan-tilt damping system, and is worthy of popularization and use.

[0061] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A butyl rubber damping material, characterized in that: The isobutyl rubber damping material comprises the following components in parts by weight: 100 parts of isobutyl rubber, 5-10 parts of polyethylene resin, 5-10 parts of methyl vinyl silicone rubber, 15-30 parts of reinforcing agent, 5-15 parts of damping filler, 0.5-3 parts of antioxidant, 0.5-5 parts of processing aid, 5-30 parts of softener, 0.5-3 parts of vulcanization crosslinking agent, and 0.5-3 parts of vulcanizing agent; The damping filler is nano acrylate and nano calcium carbonate, the mass ratio of the nano acrylate to the nano calcium carbonate is 2:1, the vulcanization cross-linking agent is one or a combination of low molecular weight vinyl polybutadiene co-cross-linking agent, Diak No.1, BIPB, the low molecular weight vinyl polybutadiene co-cross-linking agent is Ricon153D or Ricon154D; the vulcanizing agent is PERKADOX 14-40B-GR-S. The preparation method of the butyl rubber damping material comprises the following steps: S1. Raw rubber plasticizing: set the roller temperature of the internal mixer to 145-150°C, the roller speed of the internal mixer to 40-50rpm, put the isobutyl rubber, polyethylene resin and methyl vinyl silicone rubber into the internal mixer for breaking and kneading for 180-200s; S2. Mixing rubber materials: Add reinforcing agent, antioxidant, processing aid and softener into the internal mixer in sequence, mix and knead for 15 to 18 minutes, and lift the hammer to clean; S3, cooling and mixing: first set the roller temperature of the internal mixer to 120-125°C, add damping filler into the internal mixer, lift the hammer to clean for 20-40 seconds, then set the roller temperature of the internal mixer to 100-110°C, add vulcanizing crosslinking agent and vulcanizing agent into the internal mixer, knead for 60-100 seconds, discharge the material, and obtain the mixed rubber material; S4, sheeting: firstly, the mixed rubber material is put into an open mixer for refining at 90-100° C. for 5-8 minutes, then filtered, and finally put into a tablet press for calendering to obtain the isobutyl rubber damping material.

2. The butyl rubber damping material according to claim 1, characterized in that: The content of vinyl acetate in the polyethylene resin is 4% to 5%.

3. The butyl rubber damping material according to claim 1, characterized in that: The vinyl content of the methyl vinyl silicone rubber is 0.1% to 0.24%.

4. The butyl rubber damping material according to claim 1, characterized in that: The reinforcing agent is paraffin oil.

5. The butyl rubber damping material according to claim 1, characterized in that: The antioxidant is antioxidant MB.

6. The butyl rubber damping material according to claim 1, characterized in that: The processing aid is homogenizer A78.

7. The butyl rubber damping material according to claim 1, characterized in that: The softener is any one of dibutyl phthalate, dioctyl phthalate, tricresyl phosphate, dioctyl sebacate and dioctyl adipate.