CN110591217A - AEM rubber for automobile turbocharger tubes and preparation method thereof - Google Patents

Abstract

The invention discloses an AEM rubber for an automobile turbocharger tube, which comprises the following components in percentage by weight: 60.0-70.0% of vinyl acrylate rubber, 25.0-35.0% of carbon black, 2.0-4.0% of softening plasticizer, 1.0-2.0% of anti-aging agent, 1.0-2.0% of processing aid and 2.0-4.0% of vulcanizing agent. The invention has the characteristics of high temperature resistance, oil resistance, thermal oxidation aging resistance, ultraviolet irradiation resistance, good low-temperature brittleness, enough use strength and the like in the use environment.

Description

AEM rubber for automobile turbocharger tubes and preparation method thereof

Technical Field

The invention belongs to the field of rubber, and particularly relates to AEM rubber for an automobile turbocharger tube and a preparation method thereof.

Background

The turbocharged engine has the characteristics of sufficient fuel combustion, large power output, low emission and the like, conforms to the development trend of automobiles with energy conservation, emission reduction, safety and environmental protection, and is developed rapidly.

The temperature of compressed gas can be increased after leaving a compression chamber no matter the turbocharged engine adopts a mechanical supercharging system, an exhaust gas turbocharging system or a composite supercharging system, and the temperature of the compressed gas entering a gas outlet rubber pipe of the turbocharger is generally between 190 and 250 ℃; the gas is cooled between the compression chamber and the engine, the temperature of the cooled gas is different due to the difference of the inlet air temperature, the cooling effect of the intercooler and the pipeline arrangement, and the temperature of the gas entering the air outlet rubber pipe of the intercooler is generally 90-180 ℃. The air outlet rubber pipe of the supercharger of the turbocharged engine is generally called a high-temperature section rubber pipe, and the air outlet rubber pipe of the intercooler is called a low-temperature section rubber pipe. Therefore, the rubber hose material applied to the turbocharging system must be capable of bearing high-temperature thermal oxidation aging and ozone aging.

The compressed gas passing through the rubber hose of the turbocharging system is generally mixed with oil gas, so the rubber hose must have good high-temperature oil gas resistance.

Compressed gas passing through a rubber tube of a turbocharging system has certain pressure, and although a reinforcing layer is arranged in the rubber tube, the material of the rubber tube is required to have certain strength so as to improve the overall strength of the rubber tube.

Generally, the turbo-charging rubber pipe is connected with the metal pipe through a clamp to form a pipeline. At high temperature, the rubber has good deformation resistance, otherwise, the compression permanent deformation is too large, so that the clamp can be loosened, the rubber pipe can fall off, and quality accidents are caused.

Although the rubber hose is used in a high-temperature environment after the engine is started, the rubber hose is exposed to cold air after the engine is stopped. If the low temperature resistance of the rubber is poor, the rubber tube will become hard and brittle, which results in tearing, falling off and loss of the vibration damping function.

The rubber layer of the turbocharging rubber pipe is well adhered to the reinforcing layer and the lining layer in severe environments such as cold, hot, oil gas and the like, has certain adhesive strength and ensures that the delaminating phenomenon does not occur.

Disclosure of Invention

Aiming at the problems, the invention provides the AEM rubber for the automobile turbocharger tube, which is resistant to high temperature, oil, ozone, thermal oxidation aging and ultraviolet radiation under the use environment, has good low-temperature brittleness and sufficient use strength, and is suitable for manufacturing the automobile turbocharger tube.

In order to achieve the purpose, the technical scheme of the invention is as follows: the AEM rubber for the automobile turbocharger tube is composed of the following components in percentage by weight:

60.0-70.0% of ethylene acrylate rubber;

20.0 to 35.0 percent of carbon black;

2.0 to 6.0 percent of softening plasticizer;

1.0 to 2.0 percent of anti-aging agent;

1.0-2.0% of processing aid;

2.0 to 4.0 percent of vulcanizing agent.

Preferably, the AEM rubber for the automobile turbocharger pipe is composed of the following components in percentage by weight:

preferably, the ethylene acrylate adhesive is VAMAC GXF.

Preferably, the carbon black is cabot N550.

Preferably, the softening plasticizer is RS-735.

Preferably, the anti-aging agent is an anti-aging agent KY-845.

Preferably, the vulcanizing agent is DIAK NO: 1.

preferably, the ratio of carbon black to ethylene acrylate rubber is at least 1: 1.7. Thus, the processing technology performance can be improved on the basis of ensuring that the rubber meets the performance.

The invention also provides a preparation method of the AEM rubber for the automobile turbocharger tube, which sequentially comprises the following steps:

(1) preparing materials: the proportioning of claim 1, wherein ethylene acrylate rubber, carbon black, softening plasticizer, anti-aging agent and processing aid are respectively weighed and then mixed to form a component A, and a vulcanizing agent is weighed to form a component B;

(2) first mixing: adding the components except the carbon black and the softening plasticizer in the ingredient A into an internal mixer for mixing for 60-90 seconds, then lifting and cleaning a hammer, then adding the carbon black and the softening plasticizer for press hammer mixing for 60-90 seconds, again lifting and cleaning the hammer, then press hammer mixing for 30-60 seconds, discharging, and discharging at the temperature of 110-115 ℃ to a cutting machine to obtain a rubber compound A;

(3) and (3) second mixing: and (3) putting the rubber compound A and the ingredient B prepared in the first mixing into an internal mixer for mixing for 30-40 seconds, then continuously mixing for 10-30 seconds after cleaning, discharging to an open mill at the temperature of not higher than 60 ℃, uniformly mixing on the open mill, and then discharging to obtain the finished product.

In the steps (2) and (3), the mixing is carried out in stages, the mixing time and the mixing temperature are ensured, and the uniform mixing and dispersion of the components, the volatilization of low molecular substances and the processing safety can be ensured.

The invention selects VAMAC GXF rubber as a main material of rubber, ethylene copolymer with 8-40% of methyl acrylate content, and a molecular main chain of the ethylene copolymer is a saturated carbon chain. The main chain structure ensures that the acrylate adhesive has excellent high temperature resistance, oil resistance, ozone resistance, thermal oxidation aging resistance, ultraviolet radiation resistance, better low-temperature brittleness, enough strength and adhesiveness with other materials; carbon black N550 is adopted in the formula, so that the requirements of the performance and the processing technology of the rubber are met; softening plasticizer RS-735 firstly ensures that the heat resistance of the rubber is not reduced, while improving the processability of the rubber, DIAK NO: 1 ensures the heat resistance of the rubber.

The invention has the advantages of high temperature resistance, oil resistance, thermal oxidation aging resistance, ultraviolet irradiation resistance, better low-temperature brittleness and enough strength, and is suitable for automobile turbocharging pipes.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to specific embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

An AEM ethylene acrylate rubber for an automobile turbocharger tube is composed of the following components in percentage by weight:

60.0-70.0% of ethylene acrylate rubber;

20.0 to 35.0 percent of carbon black;

2.0 to 6.0 percent of softening plasticizer;

1.0 to 2.0 percent of anti-aging agent;

1.0-2.0% of processing aid;

2.0 to 4.0 percent of vulcanizing agent.

Examples

The rubbers for automobile turbocharger pipes of examples 1 to 4 were produced in the component ratios shown in Table 1.

The AEM rubber for the automobile turbocharger tube is prepared according to the following steps:

(1) preparing materials: respectively weighing ethylene acrylate rubber, carbon black, a softening plasticizer, an anti-aging agent and a processing aid according to the components and the proportion in the table 1, mixing to form a component A, and weighing a vulcanizing agent to form a component B;

(2) first mixing: adding the components except the carbon black and the softening plasticizer in the ingredient A into an internal mixer for mixing for 60-90 seconds, then lifting and cleaning a hammer, then adding the carbon black and the softening plasticizer for press hammer mixing for 60-90 seconds, again lifting and cleaning the hammer, then press hammer mixing for 30-60 seconds, discharging, and discharging at the temperature of 110-115 ℃ to a cutting machine to obtain a rubber compound A;

(3) and (3) second mixing: and (3) putting the rubber compound A and the ingredient B prepared in the first mixing into an internal mixer for mixing for 30-40 seconds, then continuously mixing for 10-30 seconds after cleaning, discharging to an open mill at the temperature of not higher than 60 ℃, uniformly mixing on the open mill, and then discharging to obtain the finished product.

TABLE 1 weight percentages of the ingredients of examples 1-4

In table 1, the acrylate glue is VAMAC GXF.

The carbon black is cabot N550.

The softening plasticizer is RS 735.

The anti-aging agent is KY845

The vulcanizing agent is DIAK NO: 1.

TABLE 2 mixing time for examples 1 to 4

Table 3 results of testing physical Properties of rubber articles of examples 1 to 4

As can be seen from Table 3, the rubber products of the embodiments 1 to 4 of the invention have the characteristics of high temperature resistance, oil resistance, ozone resistance and lower brittleness temperature, can be used for a long time in a use environment, and are suitable for automobile turbocharger pipes.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (8)

1. The AEM rubber for the automobile turbocharger pipe is characterized by comprising the following components in percentage by weight:

60.0-70.0% of ethylene acrylate rubber;

20.0 to 35.0 percent of carbon black;

2.0 to 4.0 percent of softening plasticizer;

1.0 to 2.0 percent of anti-aging agent;

1.0-2.0% of processing aid;

2.0 to 4.0 percent of vulcanizing agent.

2. The AEM rubber for automotive turbocharger tubes according to claim 1, wherein the ethylene acrylate rubber is VAMAC GXF.

3. The AEM rubber for automotive turbochargers according to claim 1, wherein the carbon black is cabot N550.

4. The AEM rubber for automotive turbochargers according to claim 1, wherein the softening plasticizer is RS-735.

5. The AEM rubber for automobile turbochargers according to claim 1, wherein the antioxidant is antioxidant KY-845.

6. The AEM rubber for automotive turbochargers according to claim 1, wherein the vulcanizing agent is DIAK NO: 1.

7. the AEM rubber for automotive turbocharger tubes according to claim 1, wherein the ratio of carbon black to ethylene acrylate rubber is at least 1: 1.7.

8. The method for preparing the AEM rubber for the automobile turbocharger tube according to claim 1, wherein the preparation method sequentially comprises the following steps:

(1) preparing materials: the proportioning of claim 1, wherein ethylene acrylate rubber, carbon black, softening plasticizer, anti-aging agent and processing aid are respectively weighed and then mixed to form a component A, and a vulcanizing agent is weighed to form a component B;

(2) first mixing: adding the components except the carbon black and the softening plasticizer in the ingredient A into an internal mixer for mixing for 60-90 seconds, then lifting and cleaning a hammer, then adding the carbon black and the softening plasticizer for press hammer mixing for 60-90 seconds, again lifting and cleaning the hammer, then press hammer mixing for 30-60 seconds, discharging, and discharging at the temperature of 110-115 ℃ to a cutting machine to obtain a rubber compound A;

(3) and (3) second mixing: and (3) putting the rubber compound A and the ingredient B prepared in the first mixing into an internal mixer for mixing for 30-40 seconds, then continuously mixing for 10-30 seconds after cleaning, discharging to an open mill at the temperature of not higher than 60 ℃, uniformly mixing on the open mill, and then discharging to obtain the finished product.