Ultra-wide-temperature-range high-damping environment-friendly flame-retardant vehicle body damping plate as well as preparation method and application thereof

Abstract

The invention belongs to the field of polymer preparations, and particularly relates to an ultra-wide-temperature-range high-damping environment-friendly flame-retardant vehicle body damping plate as well as a preparation method and application thereof. The automobile body damping plate is prepared from 40 to 60 parts of brominated butyl rubber, 40 to 60 parts of HMMM grafted oxidized SBS (Styrene Butadiene Styrene), 10 to 20 parts of softening agent, 50 to 80 parts of composite flame retardant, 10 to 30 parts of tackifying resin and 10 to 40 parts of inorganic filler. According to the technical scheme, the brominated butyl rubber and the HMMM grafted oxidized SBS are used as composite basic rubber, the HMMM grafted oxidized SBS is introduced, so that the polar compatibility is improved, molecular chain entanglement points are introduced, an ultra-wide-temperature-range high-damping plate base material is formed, and effective damping can be achieved within the temperature ranging from-40 DEG C to 120 DEG C; as a preferable form, a large amount of nitrogen element is introduced into HMMM grafted oxidized SBS, so that the material achieves a flame-retardant effect, meanwhile, ammonium polyphosphate and aluminum hydroxide are compositely added, ammonium polyphosphate catalyzes carbon formation, and aluminum hydroxide is matched for heat absorption and cooling, so that a good flame-retardant effect can be achieved.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of high polymer preparation, and particularly relates to a super-wide temperature range high-damping environment-friendly flame-retardant vehicle body damping plate material and a preparation method and application thereof. BACKGROUND

[0002] The vehicle body damping plate material is a kind of viscoelastic material attached to the inner surface of the vehicle body, which is closely attached to the steel plate wall of the vehicle body, and mainly serves to reduce noise and vibration. The asphalt damping plate material contains a large amount of polycyclic aromatic hydrocarbons, which releases toxic substances and abnormal odor at a high temperature. The non-asphalt damping pad mainly comprises organic polymer materials, which can easily burn violently when exposed to open flames, and cannot meet the development needs of new energy vehicles. SUMMARY

[0003] The application aims to overcome the shortcomings of the prior art and provide a super-wide temperature range high-damping environment-friendly flame-retardant vehicle body damping plate material and a preparation method and application thereof.

[0004] To achieve the above-mentioned purpose, the technical scheme adopted by the application is as follows:

[0005] A super-wide temperature range high-damping environment-friendly flame-retardant vehicle body damping plate material comprises 40-60 parts of brominated butyl rubber, 40-60 parts of HMMM grafted oxidized SBS, 10-20 parts of a softening agent, 50-80 parts of a composite flame retardant, 10-30 parts of tackifying resin, and 10-40 parts of inorganic fillers.

[0006] Preferably, it comprises 50 parts of brominated butyl rubber

[0007] , 500 parts of HMMM grafted oxidized SBS, 15 parts of a softening agent, 50 parts of a composite flame retardant, 20 parts of tackifying resin, and 25 parts of inorganic fillers.

[0008] The HMMM grafted oxidized SBS is prepared in the following manner: 1) SBS particles are added to toluene, and stirred and dissolved at 60℃±10℃ to form a 5-15wt% SBS toluene solution, preferably 10%; 2) after adding sulfuric acid to the SBS toluene solution, KMnO4 is added in batches, and the temperature is controlled to be ≤60℃, and after the addition is completed, the reaction is kept for a certain time to obtain a carboxylated SBS solution; 3) hexamethylol melamine HMMM is added to the carboxylated SBS solution, and stirred and dissolved at 80℃±10℃, and p-toluenesulfonic acid toluene solution is added to catalyze the reaction to obtain HMMM grafted oxidized SBS; the solid content of the HMMM grafted oxidized SBS solution is 25±2%.

[0009] The softening agent is trioctyl trimellitate.

[0010] The inorganic filler is a mixture of vermiculite and hollow glass microspheres, and the mass ratio of the two is 1:1.

[0011] The composite flame retardant is a mixture of ammonium polyphosphate and aluminum hydroxide; preferably in a mass ratio of 5:3.

[0012] The technical solution of the present application also includes a preparation method of the super-wide temperature range high-damping environmentally-friendly flame-retardant vehicle body damping plate material, which comprises the following steps: adding brominated butyl rubber and HMMM grafted oxidized SBS glue into a banbury mixer, and mixing at a high speed for 5 minutes at 110 DEG C; adding a softening agent, a composite flame retardant, and inorganic fillers, and mixing at 110 DEG C for 10 minutes; cooling to 80 DEG C, adding tackifying resin, and mixing at a low speed for 3 minutes; and molding at 150 DEG C for 15 minutes to obtain the super-wide temperature range high-damping environmentally-friendly flame-retardant vehicle body damping plate material.

[0013] The present application also includes an application of the super-wide temperature range high-damping environmentally-friendly flame-retardant vehicle body damping plate material.

[0014] Compared with the prior art, the present application has the following beneficial effects:

[0015] The technical solution of the present application uses brominated butyl rubber and HMMM grafted oxidized SBS as a composite base rubber, and introduces HMMM grafted oxidized SBS to improve the polarity compatibility and introduce molecular chain entanglement points, thereby forming a super-wide temperature range high-damping plate material base that can effectively reduce vibration at-40 DEG C to 120 DEG C; as a preferred form, the HMMM grafted oxidized SBS itself introduces a large amount of nitrogen elements, so that the material achieves flame-retardant effect, and the composite addition of ammonium polyphosphate and aluminum hydroxide can achieve good flame-retardant effect. DETAILED DESCRIPTION

[0016] In order to enable the person skilled in the art to better understand the technical solution of the present application, the present application will be further described in detail below in combination with the best embodiment.

[0017] Example 1: a super-wide temperature range high-damping environmentally-friendly flame-retardant vehicle body damping plate material, which comprises 50 parts of brominated butyl rubber, 50 parts of HMMM grafted oxidized SBS, 15 parts of a softening agent, 50 parts of a composite flame retardant, 20 parts of tackifying resin, and 25 parts of inorganic fillers.

[0018] The HMMM grafted oxidized SBS is prepared in the following manner: 1) SBS particles are added to toluene, stirred and dissolved at 60℃±10℃ to form a 10% SBS toluene solution; 2) after adding sulfuric acid to the SBS toluene solution, KMnO4 is added in batches, the temperature is controlled to be ≤60℃, and after the addition is completed, the reaction is maintained to obtain a carboxylated SBS solution; 3) HMMM is added to the carboxylated SBS solution, stirred and dissolved at 80℃±10℃, and p-toluenesulfonic acid toluene solution is added to catalyze the reaction to obtain HMMM grafted oxidized SBS (grafting rate of 20%); the solid content of the HMMM grafted oxidized SBS solution is 25±2%.

[0019] The inorganic filler is a mixture of vermiculite and hollow glass microspheres; the mass ratio of the two is 1:1.

[0020] The composite flame retardant is a mixture of ammonium polyphosphate and aluminum hydroxide; the mass ratio of the two is 5:3.

[0021] The preparation method of the super-wide temperature range high-damping environmentally friendly flame-retardant vehicle body damping plate material comprises the following steps: brominated butyl rubber and HMMM grafted oxidized SBS glue solution are added to a banbury mixer, and high-speed mixing is performed at 110℃ for 5min; a softening agent, a composite flame retardant, and an inorganic filler are added, and mixing is performed at 110℃ for 10min; the temperature is lowered to 80℃, tackifying resin is added, and low-speed mixing is performed for 3min; and 150℃ is pressed for 15min to form a super-wide temperature range high-damping environmentally friendly flame-retardant vehicle body damping plate material.

[0022] Example 2

[0023] Example 2 differs from Example 1 in that it comprises 40 parts of brominated butyl rubber, 60 parts of HMMM grafted oxidized SBS, 15 parts of a softening agent, 60 parts of a composite flame retardant, 20 parts of tackifying resin, and 25 parts of an inorganic filler.

[0024] Example 3

[0025] Example 3 differs from Example 1 in that it comprises 60 parts of brominated butyl rubber, 40 parts of HMMM grafted oxidized SBS, 15 parts of a softening agent, 60 parts of a composite flame retardant, 20 parts of tackifying resin, and 25 parts of an inorganic filler.

[0026] Example 4

[0027] Example 4 differs from Example 1 in that it comprises 50 parts of brominated butyl rubber, 50 parts of HMMM grafted oxidized SBS, 15 parts of a softening agent, 40 parts of a composite flame retardant, 20 parts of tackifying resin, and 25 parts of an inorganic filler.

[0028] Example 5

[0029] Example 5 differs from Example 1 in that it includes brominated butyl rubber 50 parts, HMMM grafted oxidized SBS 50 parts, softening agent 15 parts, composite flame retardant 60 parts, tackifying resin 20 parts, and inorganic filler 25 parts.

[0030] Comparative Example 1

[0031] Comparative Example 1 differs from Example 1 in that it includes brominated butyl rubber 50 parts, SBS 50 parts, softening agent 15 parts, composite flame retardant 60 parts, tackifying resin 20 parts, and inorganic filler 25 parts.

[0032] Comparative Example 2

[0033] Comparative Example 2 differs from Example 1 in that it includes brominated butyl rubber 50 parts, SBS 50 parts, softening agent 15 parts, composite flame retardant 60 parts, tackifying resin 20 parts, and inorganic filler 25 parts; the composite flame retardant includes ammonium polyphosphate, aluminum hydroxide, and hexamethylol melamine in a mass ratio of 5:3:2.

[0034] Table 1 shows the test standards for the examples and comparative examples, and Table 2 shows the test results.

[0035] Table 1

[0036]

[0037]

[0038] Table 2

[0039]

[0040] The results show that the flame retardant properties of Examples 1, 2, 3, 5, and Comparative Example 2 all reach the V-O level, but when the content of the composite flame retardant is low, the flame retardant properties decrease to some extent, for example, Example 4, as a preferred example of Example 1, tan δ > 0.3 within -40-120℃, while Comparative Examples 1 and 2 are less than 0.2, at the same time, the VOC content is reduced after HMMM grafting, and the tensile strength is enhanced.

[0041] In summary, the technical scheme of the present application uses brominated butyl rubber and HMMM grafted oxidized SBS as a composite base rubber, and by introducing HMMM grafted oxidized SBS, both the polarity compatibility and the molecular chain entanglement points are improved, forming a super-wide temperature range high-damping plate material base that can effectively reduce vibration within -40-120℃; as a preferred form, HMMM grafted oxidized SBS itself introduces a large amount of nitrogen elements, enabling the material to achieve flame retardant effect, at the same time, by adding ammonium polyphosphate and aluminum hydroxide, ammonium polyphosphate catalyzes carbonization, and in combination with the heat absorption and cooling of aluminum hydroxide, good flame retardant effect can be achieved.

[0042] The above merely describes the preferred embodiments of the present application, and it should be pointed out that those skilled in the art can make several improvements and refinements without departing from the principles of the present application, and these improvements and refinements should also be considered as falling within the protection scope of the present application.

Claims

1. A high-damping, environmentally friendly, flame-retardant automotive body damping sheet with an ultra-wide temperature range, characterized in that, It includes 40-60 parts of brominated butyl rubber, 40-60 parts of HMMM grafted oxidized SBS, 10-20 parts of softener, 50-80 parts of composite flame retardant, 10-30 parts of tackifying resin, and 10-40 parts of inorganic filler.

2. The ultra-wide temperature range high damping environmentally friendly flame-retardant body damping sheet material according to claim 1, characterized in that, It includes 50 parts of brominated butyl rubber, 500 parts of HMMM grafted oxidized SBS, 15 parts of softener, 50 parts of composite flame retardant, 20 parts of tackifying resin, and 25 parts of inorganic filler.

3. The ultra-wide temperature range high damping environmentally friendly flame-retardant body damping sheet material according to claim 1, characterized in that, The HMMM-grafted SBS is prepared as follows: 1) SBS particles are added to toluene and stirred at 60℃±10℃ to dissolve, forming a 5-15wt%, preferably 10% SBS toluene solution; 2) Sulfuric acid is added dropwise to the SBS toluene solution, followed by the addition of KMnO4 in batches, with the temperature controlled at ≤60℃. After the addition is completed, the reaction is maintained at this temperature to obtain a carboxylated SBS solution; 3) Hexamethylol melamine (HMMM) is added to the carboxylated SBS solution and stirred at 80℃±10℃ to dissolve. Toluenesulfonic acid toluene solution is then added to catalyze the reaction, resulting in HMMM-grafted SBS; the solid content of the HMMM-grafted SBS solution is 25±2%.

4. The ultra-wide temperature range high damping environmentally friendly flame-retardant body damping sheet according to claim 1, characterized in that, The softener is trioctyl trimellitate.

5. The ultra-wide temperature range high damping environmentally friendly flame-retardant body damping sheet material according to claim 1, characterized in that, The inorganic filler is a mixture of vermiculite and hollow glass microspheres; the mass ratio of the two is 1:

1.

6. The ultra-wide temperature range high damping environmentally friendly flame-retardant vehicle body damping sheet according to claim 1, characterized in that, The composite flame retardant is a mixture of ammonium polyphosphate and aluminum hydroxide; the preferred mass ratio is 5:

3.

7. A method for preparing an ultra-wide temperature range high-damping environmentally friendly flame-retardant vehicle body damping sheet according to any one of claims 1-6, characterized in that, The process includes the following steps: adding brominated butyl rubber and HMMM grafted oxidized SBS solution to a mixer and mixing at 110°C for 5 minutes; adding a softener, composite flame retardant, and inorganic filler, mixing at 110°C for 10 minutes, cooling to 80°C, adding tackifying resin, and mixing at low speed for 3 minutes; and molding at 150°C for 15 minutes to obtain an ultra-wide temperature range, high damping, environmentally friendly, flame-retardant body damping sheet.

8. The application of the ultra-wide temperature range high damping environmentally friendly flame-retardant body damping sheet material as described in any one of claims 1-6.

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