CN111675832A - A kind of composite rubber sound insulation material and preparation method thereof - Google Patents

Abstract

The invention relates to a composite rubber sound insulation material and a preparation method thereof. Composite rubber sound insulation material, made from the following raw materials by weight: 70-80 parts of nitrile rubber, 20-30 parts of neoprene, 1.6-2.5 parts of anti-aging agent, 1-1.5 parts of vulcanizing agent, and 6.5-8 parts of active agent parts, 4-5.2 parts of accelerator, 80-88 parts of reinforcing filler, 10-12 parts of dispersant, 10 parts of mica powder, 12 parts of hollow glass beads and 5 parts of montmorillonite. The invention can significantly improve its sound insulation performance, and the physical and mechanical properties are also strengthened, so that while maintaining good comprehensive performance, the sound insulation performance and physical and mechanical properties are also greatly improved.

Description

A kind of composite rubber sound insulation material and preparation method thereof

technical field

The invention belongs to the technical field of rubber composite material preparation, and particularly relates to a composite rubber sound insulation material and a preparation method thereof.

Background technique

The composite rubber material with excellent comprehensive performance has outstanding advantages in sound insulation and vibration reduction. The damping and sound insulation mechanisms are introduced into the material at the same time to improve the sound insulation and vibration reduction performance of the material.

However, the effective damping temperature range of a single rubber material is only 20 °C to 40 °C, and it is concentrated below room temperature, which cannot meet the complex and changeable practical work requirements.

Blending nitrile rubber and neoprene rubber with good damping performance and large difference in glass transition temperature, and adding fillers such as mica powder, hollow glass microbeads, montmorillonite, etc., can significantly improve its sound insulation performance, and physical Mechanical properties have also been enhanced.

SUMMARY OF THE INVENTION

One object of the present invention is to provide a composite rubber sound insulation material and a preparation method thereof, which can solve the problems of poor comprehensive performance, poor sound insulation performance, poor physical and mechanical properties of the existing composite rubber materials, and the effective damping temperature range of its constituent materials. Only 20 ℃ ~ 40 ℃, and concentrated below room temperature, can not meet the technical problems of complex and changeable practical work requirements.

In order to achieve the above purpose, the present invention provides a composite rubber sound insulation material, which is made from the following raw materials in parts by weight: nitrile rubber, 70-80 parts; neoprene, 20-30 parts; anti-aging agent, 1.6-2.5 parts parts; vulcanizing agent, 1-1.5 parts; active agent, 6.5-8 parts; accelerator, 4-5.2 parts; reinforcing filler, 80-88 parts; dispersant, 10-12 parts; mica powder, 10 parts; Insulating glass beads, 12 parts; and montmorillonite, 5 parts.

Further, the reinforcing filler is one or more of carbon black N219 and white carbon black.

Preferably, in the reinforcing filler, the carbon black N219 is 65-70 parts, and the white carbon black is 15-18 parts.

Further, the accelerator is tetramethylthiuram disulfide (accelerator TMTD), ethylene thiourea (accelerator NA-22) and 2,2'-dithiodibenzothiazole (accelerator DM ) one or more of.

Preferably, the tetramethylthiuram disulfide is 1.5-2 parts, the ethylene thiourea is 1-1.2 parts, and the 2,2'-dithiodibenzothiazole is 1.5-2 parts .

Further, the active agent is one or more of stearic acid, zinc oxide, and magnesium oxide.

Preferably, in the active agent, the stearic acid is 0.5-0.8 parts, the zinc oxide is 5-6 parts, and the magnesium oxide is 1-1.2 parts.

Further, the anti-aging agent is 0.3-0.5 part of N-cyclohexyl-N'-phenyl-p-phenylenediamine (anti-aging agent 4010), 0.3-0.5 part of 9,9-dimethylacridine (anti-aging agent BLE) , one or more of 1-1.5 parts of 2-mercaptobenzimidazole (anti-aging agent MB).

Preferably, in the antioxidant, the N-cyclohexyl-N'-phenyl-p-phenylenediamine is 0.3-0.5 part, and the 9,9-dimethylacridine is 0.3-0.5 part, so The 2-mercaptobenzimidazole is 1-1.5 parts.

Further, the vulcanizing agent includes sulfur; and/or the dispersing agent includes dioctyl ester.

Further, the grade of the nitrile rubber is N41; and/or the grade of the neoprene rubber is 230.

Further, the particle size of the mica powder is 1250±300; and/or the grade of the hollow glass microbeads is qp550; and/or the particle size of the montmorillonite is 2500±500.

In order to achieve the above object, the present invention also provides a preparation method of the above-mentioned composite rubber sound insulation material, which comprises the steps:

In the step of preparing the masterbatch, the nitrile rubber, the neoprene rubber, the antioxidant, the reinforcing filler, the dispersant, the The mica powder, the hollow glass microbeads and the montmorillonite are mixed on an internal mixer for 4-5 minutes to form a masterbatch, and the refined masterbatch is cooled to room temperature;

In the thin-pass processing step, the vulcanizing agent, the active agent and the accelerator are added on an open mill, and the thin-pass method is used for 5-10 times; and

In the vulcanization treatment step, the thin-pass masterbatch is unrolled from the open mill and parked for 10-30 hours, and then subjected to vulcanization treatment to obtain a rubber composite material.

Further, when the vulcanization treatment is performed in the vulcanization treatment step, the vulcanization temperature range is 150-180° C., the vulcanization time is 10-20 min, and the vulcanization pressure is 13-18 MPa.

The beneficial effect of the present invention is to provide a new type of composite rubber sound insulation material and a preparation method thereof, wherein nitrile rubber and chloroprene rubber with good damping performance and large difference in glass transition temperature are blended, and mica powder, Fillers such as hollow glass beads and montmorillonite can significantly improve its sound insulation performance, and the physical and mechanical properties have also been strengthened, so that while maintaining good overall performance, the sound insulation performance and physical and mechanical properties have also been greatly improved.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained from these drawings without creative effort.

FIG. 1 is a flow chart of the preparation method of the composite rubber sound insulation material in the embodiment of the present invention.

Detailed ways

The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, so as to fully introduce the technical content of the present invention to those skilled in the art, to exemplify the implementation of the present invention, to make the technical content disclosed in the present invention clearer, and to make the present invention clearer. Those skilled in the art will more readily understand how to implement the present invention. However, the present invention can be embodied in many different forms of embodiments, the protection scope of the present invention is not limited to the embodiments mentioned herein, and the description of the following embodiments is not intended to limit the scope of the present invention.

This embodiment provides a composite rubber sound insulation material, and the present invention provides a composite rubber sound insulation material, which is made of the following raw materials by weight: nitrile rubber, 70-80 parts; chloroprene rubber, 20-30 parts; Anti-aging agent, 1.6-2.5 parts; Vulcanizing agent, 1-1.5 parts; Active agent, 6.5-8 parts; Accelerator, 4-5.2 parts; Reinforcing filler, 80-88 parts; Dispersant, 10-12 parts; Mica powder, 10 parts; hollow glass microbeads, 12 parts; and montmorillonite, 5 parts.

The present invention adopts nitrile rubber and chloroprene rubber as basic materials, the molecular chain of nitrile rubber has polar side cyano group—CN, and the molecular chain of chloroprene rubber contains side group chlorine atom group—Cl, and the damping performance is good. At the same time, the intermolecular force is strong, which can convert sound energy into heat energy faster and improve the sound insulation performance.

In this embodiment, the reinforcing filler is one or more of carbon black N219 and white carbon black. Reinforcing fillers can improve the mechanical properties of the base rubber, and at the same time improve the aging resistance and tearing properties of the rubber material. Preferably, in the reinforcing filler, the carbon black N219 is 65-70 parts, and the white carbon black is 15-18 parts.

In this embodiment, the accelerators are tetramethylthiuram disulfide (accelerator TMTD), ethylene thiourea (accelerator NA-22) and 2,2'-dithiodibenzothiazole (accelerator NA-22) one or more of the agents DM). The accelerator can promote the activation of the vulcanizing agent, thereby accelerating the cross-linking reaction between the vulcanizing agent and the rubber molecules, and achieving the effects of shortening the vulcanization time and reducing the vulcanization temperature. Preferably, the tetramethylthiuram disulfide is 1.5-2 parts, the ethylene thiourea is 1-1.2 parts, and the 2,2'-dithiodibenzothiazole is 1.5-2 parts .

In this embodiment, the active agent is one or more of stearic acid, zinc oxide, and magnesium oxide. The active agent can activate the vulcanization system, increase the crosslinking density of the vulcanizate, and improve the aging resistance of the vulcanizate. Preferably, in the active agent, the stearic acid is 0.5-0.8 parts, the zinc oxide is 5-6 parts, and the magnesium oxide is 1-1.2 parts.

In this embodiment, the anti-aging agent is N-cyclohexyl-N'-phenyl-p-phenylenediamine (anti-aging agent 4010) 0.3-0.5 parts, 9,9-dimethylacridine (anti-aging agent BLE) 0.3- 0.5 part, one or more of 1-1.5 parts of 2-mercaptobenzimidazole (anti-aging agent MB).

Preferably, in the antioxidant, the N-cyclohexyl-N'-phenyl-p-phenylenediamine is 0.3-0.5 part, and the 9,9-dimethylacridine is 0.3-0.5 part, so The 2-mercaptobenzimidazole is 1-1.5 parts.

In this embodiment, the vulcanizing agent includes sulfur.

The dispersant includes dioctyl ester, and the dispersant can improve the dispersibility of the compounding agent in the rubber, shorten the mixing time, improve the production efficiency, and at the same time improve the physical and mechanical properties of the mixed rubber.

In this embodiment, the grade of the nitrile rubber is N41; and/or the grade of the neoprene rubber is 230.

In this embodiment, the particle size of the mica powder is 1250±300; and/or the grade of the hollow glass microbeads is qp550; and/or the particle size of the montmorillonite is 2500±500. In this embodiment, the mica powder, the hollow glass microbeads, and the montmorillonite are used as fillers, which can improve the sound insulation performance of the material.

As shown in Figure 1, in order to achieve the above purpose, the present invention also provides a preparation method of the above-mentioned composite rubber sound insulation material, which comprises the steps:

S1, the step of preparing a masterbatch, according to the formula of the composite rubber sound insulation material according to claim 1, the nitrile rubber, the neoprene rubber, the anti-aging agent, the reinforcing filler, the dispersing agent are mixed , The mica powder, the hollow glass microbeads and the montmorillonite are mixed on an internal mixer for 4-5min to form a masterbatch, and the refined masterbatch is cooled to room temperature;

S2, thin pass treatment step, add described vulcanizing agent, described active agent and described accelerator on the mill, adopt thin pass method to thin pass 5-10 times; And

S3, the vulcanization treatment step, the thin-pass masterbatch is sliced from the open mill and parked for 10-30 hours, and then subjected to vulcanization treatment to obtain a rubber composite material.

In this embodiment, when the vulcanization treatment is performed in the vulcanization treatment step, the vulcanization temperature is in the range of 150-180° C., the vulcanization time is 10-20 min, and the vulcanization pressure is 13-18 MPa. Preferably, the vulcanization temperature is 162° C., the vulcanization time is 15min, and the vulcanization pressure is 15MPa.

Since the present invention adopts the above scheme, the obtained composite rubber sound insulation material has better comprehensive mechanical properties, and the sound insulation performance is also greatly improved. It has been verified that the maximum sound insulation is 46.61dB and the average sound insulation is 29.60dB when the frequency is 63Hz to 6300Hz.

The present invention will be described in further detail below in conjunction with the embodiments.

Table 1 is the formula of the composite rubber material described in the application, specifically related to Examples 1-4, wherein Example 4 is used as a comparative example, and the CIIR/NBR composite rubber material is prepared according to Table 1.

Table 1

Preparation of composite rubber sound-insulating material: Weigh the corresponding mass parts of neoprene rubber, nitrile rubber, antioxidant 4010, antioxidant BLE, antioxidant MB, carbon black N219, white carbon black, dioctyl ester according to Example 1-3 , mica powder, hollow glass microbeads, and montmorillonite are mixed on an internal mixer for 4-5min, and the masterbatch is cooled to room temperature; 22. Accelerator T MTD, accelerator DM, zinc oxide, magnesium oxide, stearic acid, thinly pass 5-10 times by thin pass method, and finally unload and park for more than 24 hours for use.

The composite rubber sound-insulating material prepared in the above steps was vulcanized with a flat vulcanizer for 15 minutes under the conditions of a temperature of 162° C. and a pressure of 15 MPa, and then samples were cut out for testing.

Table 2

Example 1 Example 2 Example 3 Example 4 Maximum sound insulation 46.61 47.12 46.92 42.06 Average sound insulation 29.60 30.22 29.87 23.61

table 3

It can be seen from Table 2 that the composite rubber sound insulation material has better physical and mechanical properties. As can be seen from Table 3, compared with Examples 1-4, the maximum sound insulation and average sound insulation of the composite rubber sound insulation material added with mica powder, hollow glass microbeads and montmorillonite have been improved to a certain extent.

In conclusion, the present invention provides a composite rubber sound insulation material and a preparation method thereof. The composite rubber sound insulation material not only has good physical and mechanical properties, but also has excellent sound insulation properties.

The beneficial effect of the present invention is to provide a new type of composite rubber sound insulation material and a preparation method thereof, wherein nitrile rubber and chloroprene rubber with good damping performance and large difference in glass transition temperature are blended, and mica powder, Fillers such as hollow glass beads and montmorillonite can significantly improve its sound insulation performance, and the physical and mechanical properties have also been strengthened, so that while maintaining good overall performance, the sound insulation performance and physical and mechanical properties have also been greatly improved.

The composite rubber sound-insulating material provided by the present invention and the preparation method thereof are described in detail above. It should be understood that the exemplary embodiments described herein should be regarded as descriptive only, and are used to help understand the method and the core idea of the present invention, but not to limit the present invention. Descriptions of features or aspects in each exemplary embodiment should generally be considered as applicable to similar features or aspects in other exemplary embodiments. Although the present invention has been described with reference to exemplary embodiments, various changes and modifications may be suggested to those skilled in the art. The present invention is intended to cover these changes and modifications within the scope of the appended claims, and any modifications, equivalent replacements and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention .

Claims (10)

1. a composite rubber sound-insulating material, is characterized in that, is made of the raw material of following parts by weight: Nitrile rubber, 70-80 parts; Neoprene, 20-30 parts; Anti-aging agent, 1.6-2.5 servings; Vulcanizing agent, 1-1.5 parts; Active agent, 6.5-8 servings; Accelerator, 4-5.2 servings; Reinforcing filler, 80-88 servings; Dispersant, 10-12 parts; Mica powder, 10 servings; Insulating glass beads, 12 servings; and Montmorillonite, 5 servings. 2 . The composite rubber sound insulation material according to claim 1 , wherein the reinforcing filler is one or more of carbon black N219 and white carbon black. 3 . Preferably, in the reinforcing filler, the carbon black N219 is 65-70 parts, and the white carbon black is 15-18 parts. 3 . The composite rubber soundproofing material according to claim 1 , wherein the accelerator is one of tetramethylthiuram disulfide, ethylene thiourea and 2,2'-dithiodibenzothiazole. 4 . one or more of. Preferably, the tetramethylthiuram disulfide is 1.5-2 parts, the ethylene thiourea is 1-1.2 parts, and the 2,2'-dithiodibenzothiazole is 1.5-2 parts . 4 . The composite rubber soundproofing material according to claim 1 , wherein the active agent is one or more of stearic acid, zinc oxide, and magnesium oxide. 5 . Preferably, in the active agent, the stearic acid is 0.5-0.8 parts, the zinc oxide is 5-6 parts, and the magnesium oxide is 1-1.2 parts. 5. The composite rubber soundproofing material according to claim 1, wherein the anti-aging agent is 0.3-0.5 parts of N-cyclohexyl-N'-phenyl-p-phenylenediamine, 9,9-dimethyl acridine One or more of 0.3-0.5 parts of pyridine and 1-1.5 parts of 2-mercaptobenzimidazole. Preferably, in the antioxidant, the N-cyclohexyl-N'-phenyl-p-phenylenediamine is 0.3-0.5 part, and the 9,9-dimethylacridine is 0.3-0.5 part, so The 2-mercaptobenzimidazole is 1-1.5 parts. 6 . The composite rubber soundproofing material according to claim 1 , wherein the vulcanizing agent comprises sulfur; and/or the dispersing agent comprises dioctyl ester. 7 . 7 . The composite rubber sound-insulating material according to claim 1 , wherein the nitrile rubber has a grade of N41; and/or the neoprene rubber has a grade of 230. 8 . 8. The composite rubber sound-insulating material according to claim 1, wherein the particle size of the mica powder is 1250±300; and/or the grade of the hollow glass microbeads is qp550; and/or, the The particle size of montmorillonite is 2500±500. 9. the preparation method of the composite rubber sound insulation material of claim 1, is characterized in that, comprises the steps: In the step of preparing the masterbatch, the nitrile rubber, the neoprene rubber, the antioxidant, the reinforcing filler, the dispersant, the The mica powder, the hollow glass microbeads and the montmorillonite are mixed on an internal mixer for 4-5 minutes to form a masterbatch, and the refined masterbatch is cooled to room temperature; In the thin-pass processing step, the vulcanizing agent, the active agent and the accelerator are added on an open mill, and the thin-pass method is used for 5-10 times; and In the vulcanization treatment step, the thin-pass masterbatch is unrolled from the open mill and parked for 10-30 hours, and then subjected to vulcanization treatment to obtain a rubber composite material. 10 . The method for preparing a composite rubber sound-insulating material according to claim 10 , wherein when the vulcanization treatment is performed in the vulcanization treatment step, the vulcanization temperature range is 150-180° C., the vulcanization time is 10-20min, and the vulcanization pressure is 13 ℃. 11 . -18MPa.

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