1. A preparation method of an environment-friendly automobile water pipe rubber material is characterized by comprising the following steps: the method comprises the following steps:

s1, selecting materials according to a formula: 100 parts of modified polypropylene rubber, 40-60 parts of reinforcing agent, 6-8 parts of paraffin oil, 4-6 parts of accelerator and 1-1.5 parts of cross-linking agent, wherein the modified polypropylene rubber is prepared by mixing and reacting polypropylene, flame retardant, smoke suppressor, TVOC remover, odor adsorbent and stabilizer;

s2, adding the modified polypropylene rubber, the reinforcing agent, the paraffin oil, the accelerator and the cross-linking agent into an internal mixer, and internally mixing at the temperature of 100-120 ℃, the rotating speed of 35-45 r/min and the time of 4-8 min to obtain a rubber mixture;

s3, placing the rubber mixture obtained in the step S2 into an open mill for extrusion forming, and then placing the formed rubber into vulcanization equipment for treatment to obtain the environment-friendly automobile water pipe rubber material.

2. The preparation method of the environment-friendly automobile water pipe rubber material as claimed in claim 1, wherein the preparation method comprises the following steps: the modified polypropylene rubber in the step S1 is specifically prepared by: adding polypropylene, a flame retardant and a smoke suppressor into a low-speed mixer, mixing for 15-20 minutes, adding a TVOC (total volatile organic compound) remover, an odor adsorbent and a stabilizer, mixing and stirring for 20-40 minutes, heating to 70-80 ℃, vacuumizing and stirring for 2-3 hours to obtain the modified polypropylene rubber.

3. The preparation method of the environment-friendly automobile water pipe rubber material as claimed in claim 1, wherein the preparation method comprises the following steps: the flame retardant is at least one of ammonium polyphosphate, pentaerythritol phosphate, melamine phosphate and melamine cyanurate, and the smoke suppressor is at least one of magnesium hydroxide and aluminum hydroxide.

4. The preparation method of the environment-friendly automobile water pipe rubber material as claimed in claim 1, wherein the preparation method comprises the following steps: the odor adsorbent is a compound formed by mixing zeolite and clay in a mass ratio of 1:2, the TVOC remover is an alcohol substance of C1-C8, and the stabilizer is any one of a hindered phenol antioxidant, a phosphite antioxidant and a hindered amine light stabilizer.

5. The preparation method of the environment-friendly automobile water pipe rubber material as claimed in claim 1, wherein the preparation method comprises the following steps: the reinforcing agent is semi-reinforcing carbon black, the accelerator is any one of TMTM, TMTD or DM, and the cross-linking agent is a peroxide cross-linking agent.

6. The preparation method of the environment-friendly automobile water pipe rubber material as claimed in claim 1, wherein the preparation method comprises the following steps: the conditions of the open mill in the step S3 are: the open milling temperature is 60-80 ℃, and the time is 2-3 min.

7. The preparation method of the environment-friendly automobile water pipe rubber material as claimed in claim 1, wherein the preparation method comprises the following steps: the conditions for the sulfurization in step S3 are: the vulcanization pressure is 205 to 210Kgf/cm 2, the vulcanization temperature is 150 to 160 ℃, and the vulcanization time is 6 to 8 min.

Background

The automobile pipeline is one of important parts of an automobile, is widely applied to an automobile body, a skylight and an engine case, has the functions of water drainage, cooling and oil circulation, can maintain and maintain a small environment in the automobile, and has a protection effect on electric devices and other equipment in the automobile, the skylight water drainage pipe is used as one part of a skylight water drainage system, and the skylight water drainage pipe plays a role in draining accumulated water in a skylight water drainage tank, so that the skylight water drainage function is realized.

However, most of the traditional automobile skylight drain pipes are made of PVC/EPDM materials, the drain pipes made of the materials may generate harmful gases in a high-temperature environment, and do not accord with the environment-friendly concept of automobile emission reduction.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a preparation method of an environment-friendly automobile water pipe rubber material, and solves the problems that most of the traditional automobile skylight water discharge pipes are made of PVC/EPDM materials, and the water discharge pipes made of the materials can generate harmful gases in a high-temperature environment and do not accord with the environment-friendly concept of automobile emission reduction.

The second technical proposal.

The invention specifically adopts the following technical scheme for realizing the purpose:

a preparation method of an environment-friendly automobile water pipe rubber material comprises the following steps:

s1, selecting materials according to a formula: 100 parts of modified polypropylene rubber, 40-60 parts of reinforcing agent, 6-8 parts of paraffin oil, 4-6 parts of accelerator and 1-1.5 parts of cross-linking agent, wherein the modified polypropylene rubber is prepared by mixing and reacting polypropylene, flame retardant, smoke suppressor, TVOC remover, odor adsorbent and stabilizer;

s2, adding the modified polypropylene rubber, the reinforcing agent, the paraffin oil, the accelerator and the cross-linking agent into an internal mixer, and internally mixing at the temperature of 100-120 ℃, the rotating speed of 35-45 r/min and the time of 4-8 min to obtain a rubber mixture;

s3, placing the rubber mixture obtained in the step S2 into an open mill for extrusion forming, and then placing the formed rubber into vulcanization equipment for treatment to obtain the environment-friendly automobile water pipe rubber material.

Further, the modified polypropylene rubber in step S1 is specifically prepared as follows: adding polypropylene, a flame retardant and a smoke suppressor into a low-speed mixer, mixing for 15-20 minutes, adding a TVOC (total volatile organic compound) remover, an odor adsorbent and a stabilizer, mixing and stirring for 20-40 minutes, heating to 70-80 ℃, vacuumizing and stirring for 2-3 hours to obtain the modified polypropylene rubber.

Further, the flame retardant is at least one of ammonium polyphosphate, pentaerythritol phosphate, melamine phosphate and melamine cyanurate, and the smoke suppressor is at least one of magnesium hydroxide and aluminum hydroxide.

Further, the odor adsorbent is a compound formed by mixing zeolite and clay in a mass ratio of 1:2, the TVOC remover is an alcohol substance of C1-C8, and the stabilizer is any one of a hindered phenol antioxidant, a phosphite antioxidant and a hindered amine light stabilizer.

Further, the reinforcing agent is semi-reinforcing carbon black, the accelerator is any one of TMTM, TMTD or DM, and the cross-linking agent is a peroxide cross-linking agent.

Further, the conditions of the open mill in step S3 are: the open milling temperature is 60-80 ℃, and the time is 2-3 min.

Further, the conditions of the sulfurization in step S3 are: the vulcanization pressure is 205 to 210Kgf/cm 2, the vulcanization temperature is 150 to 160 ℃, and the vulcanization time is 6 to 8 min.

(III) advantageous effects

Compared with the prior art, the invention provides a preparation method of an environment-friendly automobile water pipe rubber material, which has the following beneficial effects:

according to the invention, the specific low-odor nitrogen-phosphorus halogen-free flame retardant and metal hydroxide are selected as the smoke suppressor through the modified polypropylene, so that the effects of excellent mechanical property, good flame retardant effect and low smoke density are realized, and then the odor adsorbent and the TVOC remover prepared by mixing zeolite and clay are added, so that TVOC and other small molecular substances generated in the raw materials and the processing process are effectively removed.

Drawings

FIG. 1 is a schematic view of a process for preparing an environment-friendly automobile water pipe rubber material.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious 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.

Example 1

As shown in fig. 1, a method for preparing an environment-friendly automobile water pipe rubber material according to an embodiment of the present invention includes the following steps:

s1, selecting materials according to a formula: 100 parts of modified polypropylene rubber, 40 parts of reinforcing agent, 6 parts of paraffin oil, 4 parts of accelerator and 1 part of cross-linking agent, wherein the modified polypropylene rubber is prepared by mixing and reacting polypropylene, flame retardant, smoke suppressor, TVOC remover, odor adsorbent and stabilizer;

s2, adding the modified polypropylene rubber, the reinforcing agent, the paraffin oil, the accelerator and the cross-linking agent into an internal mixer, and internally mixing at the temperature of 100 ℃, the rotating speed of 35r/min and the time of 4min to obtain a rubber mixture;

s3, placing the rubber mixture obtained in the step S2 into an open mill for extrusion forming, and then placing the formed rubber into vulcanization equipment for treatment to obtain the environment-friendly automobile water pipe rubber material.

In some embodiments, the modified polypropylene rubber in step S1 is specifically prepared as: adding polypropylene, a flame retardant and a smoke suppressor into a low-speed mixer, mixing for 15 minutes, adding a TVOC remover, an odor adsorbent and a stabilizer, mixing and stirring for 20 minutes, heating to 70 ℃, vacuumizing and stirring for 2 hours to obtain the modified polypropylene rubber.

In some embodiments, the flame retardant is a composite of ammonium polyphosphate and melamine cyanurate and the smoke suppressant is magnesium hydroxide.

In some embodiments, the odor adsorbent is a composite of zeolite and clay mixed in a mass ratio of 1:2, the TVOC remover is a C1 alcohol, and the stabilizer is a hindered phenol antioxidant.

In some embodiments, the reinforcing agent is semi-reinforcing carbon black, the accelerator is TMTM, and the crosslinking agent is a peroxide crosslinking agent.

In some embodiments, the mill conditions in step S3 are: the open milling temperature is 60 ℃ and the time is 2 min.

In some embodiments, the sulfurization conditions in step S3 are: the vulcanization pressure was 205Kgf/cm 2, the vulcanization temperature was 150 ℃ and the vulcanization time was 6 min.

Example 2

As shown in fig. 1, a method for preparing an environment-friendly automobile water pipe rubber material according to an embodiment of the present invention includes the following steps:

s1, selecting materials according to a formula: 100 parts of modified polypropylene rubber, 50 parts of reinforcing agent, 7 parts of paraffin oil, 5 parts of accelerator and 1.2 parts of cross-linking agent, wherein the modified polypropylene rubber is prepared by mixing and reacting polypropylene, flame retardant, smoke suppressor, TVOC remover, odor adsorbent and stabilizer;

s2, adding the modified polypropylene rubber, the reinforcing agent, the paraffin oil, the accelerator and the cross-linking agent into an internal mixer, and internally mixing at the temperature of 110 ℃, the rotating speed of 40r/min and the time of 6min to obtain a rubber mixture;

s3, placing the rubber mixture obtained in the step S2 into an open mill for extrusion forming, and then placing the formed rubber into vulcanization equipment for treatment to obtain the environment-friendly automobile water pipe rubber material.

In some embodiments, the modified polypropylene rubber in step S1 is specifically prepared as: adding polypropylene, a flame retardant and a smoke suppressor into a low-speed mixer, mixing for 18 minutes, adding a TVOC remover, an odor adsorbent and a stabilizer, mixing and stirring for 30 minutes, heating to 75 ℃, vacuumizing and stirring for 2.5 hours to obtain the modified polypropylene rubber.

In some embodiments, the flame retardant is a mixture of pentaerythritol phosphate and melamine cyanurate and the smoke suppressant is magnesium hydroxide.

In some embodiments, the odor adsorbent is a composite of zeolite and clay mixed in a mass ratio of 1:2, the TVOC remover is a C8 alcohol, and the stabilizer is a phosphite antioxidant.

In some embodiments, the reinforcing agent is semi-reinforcing carbon black, the accelerator is TMTD, and the crosslinker is a peroxide crosslinker.

In some embodiments, the mill conditions in step S3 are: the open milling temperature is 70 ℃ and the time is 2.5 min.

In some embodiments, the sulfurization conditions in step S3 are: the vulcanization pressure was 208Kgf/cm 2, the vulcanization temperature was 155 ℃ and the vulcanization time was 7 min.

Example 3

As shown in fig. 1, a method for preparing an environment-friendly automobile water pipe rubber material according to an embodiment of the present invention includes the following steps:

s1, selecting materials according to a formula: 100 parts of modified polypropylene rubber, 60 parts of reinforcing agent, 8 parts of paraffin oil, 6 parts of accelerator and 1.5 parts of cross-linking agent, wherein the modified polypropylene rubber is prepared by mixing and reacting polypropylene, flame retardant, smoke suppressor, TVOC remover, odor adsorbent and stabilizer;

s2, adding the modified polypropylene rubber, the reinforcing agent, the paraffin oil, the accelerator and the cross-linking agent into an internal mixer, and internally mixing at the temperature of 120 ℃, the rotating speed of 45r/min and the time of 8min to obtain a rubber mixture;

s3, placing the rubber mixture obtained in the step S2 into an open mill for extrusion forming, and then placing the formed rubber into vulcanization equipment for treatment to obtain the environment-friendly automobile water pipe rubber material.

In some embodiments, the modified polypropylene rubber in step S1 is specifically prepared as: adding polypropylene, a flame retardant and a smoke suppressor into a low-speed mixer, mixing for 20 minutes, adding a TVOC remover, an odor adsorbent and a stabilizer, mixing and stirring for 40 minutes, heating to 80 ℃, vacuumizing and stirring for 3 hours to obtain the modified polypropylene rubber.

In some embodiments, the flame retardant is a combination of melamine phosphate and melamine cyanurate and the smoke suppressant is aluminum hydroxide.

In some embodiments, the odor adsorbent is a composite of zeolite and clay mixed in a mass ratio of 1:2, the TVOC remover is a C8 alcohol, and the stabilizer is a hindered amine light stabilizer.

In some embodiments, the reinforcing agent is semi-reinforcing carbon black, the accelerator is TDM, and the crosslinking agent is a peroxide crosslinking agent.

In some embodiments, the mill conditions in step S3 are: the open milling temperature is 80 ℃ and the time is 3 min.

In some embodiments, the sulfurization conditions in step S3 are: the vulcanization pressure was 210Kgf/cm 2, the vulcanization temperature was 160 ℃ and the vulcanization time was 8 min.

Comparative example

As shown in fig. 1, a method for preparing an environment-friendly automobile water pipe rubber material according to an embodiment of the present invention includes the following steps:

s1, selecting materials according to a formula: 100 parts of PVC rubber, 50 parts of reinforcing agent, 6 parts of paraffin oil, 4 parts of accelerator and 1 part of cross-linking agent;

s2, putting the PVC rubber, the reinforcing agent, the paraffin oil, the accelerator and the cross-linking agent into an internal mixer, and internally mixing at the temperature of 110 ℃, the rotating speed of 40r/min and the time of 6min to obtain a rubber mixture;

s3, placing the rubber mixture obtained in the step S2 into an open mill for extrusion forming, and then placing the formed rubber into vulcanization equipment for treatment to obtain the environment-friendly automobile water pipe rubber material.

In some embodiments, the reinforcing agent is semi-reinforcing carbon black, the accelerator is TMTM, and the crosslinking agent is a peroxide crosslinking agent.

In some embodiments, the mill conditions in step S3 are: the open milling temperature is 80 ℃ and the time is 3 min.

In some embodiments, the sulfurization conditions in step S3 are: the vulcanization pressure was 210Kgf/cm 2, the vulcanization temperature was 160 ℃ and the vulcanization time was 8 min.

The environmental-friendly automobile water pipe rubber material prepared in the embodiments 1 to 3 and the comparative example of the invention is subjected to a performance test:

the performance tests in the above table can be tested by the following criteria: tensile strength was tested according to GB/T1040, elongation at break was tested according to NES D58066.4C, oxygen index was tested according to GB/T5454, smoke density was tested according to GB/T8627, odour was tested according to VDA270, organic compound emissions determination (TVOC) was tested according to VDA 277.

From the above table, it is known that the odor and TVOC of the environmental protection automobile water pipe rubber material prepared in the embodiments 1 to 3 of the present invention can meet the environmental protection requirement, while the odor and TVOC of the environmental protection automobile water pipe rubber material prepared in the comparative example can not meet the environmental protection requirement.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.