Extremely-low-ion-precipitation high-insulation EPDM cooling water pipe and production and preparation process thereof

Abstract

The invention relates to a production and preparation process of an extremely-low-ion-precipitation high-insulation EPDM cooling water pipe. The production and preparation process specifically comprises the following process steps: (1) firstly putting ethylene-propylene-diene monomer 4045M and ethylene-propylene-diene monomer SK552-1 into an internal mixer for mixing; (2) adding zinc oxide, stearic acid, polyethylene glycol, an anti-aging agent MB, a silane coupling agent KH550, paraffin oil, carbon black N339, titanium dioxide, white carbon black and light calcium carbonate into an internal mixer, and blending with the rubber material in the step (1); (3) lifting a top bolt on the internal mixer, and cleaning a charging tray; (4) pressing a top peg on the internal mixer for mixing, and discharging rubber when the mixing temperature reaches 130 DEG C; (5) cooling the rubber material mixed in the step (4) to below 80 DEG C, adding a vulcanizing agent DCP and a bridging agent TAIC-70, mixing for 180 seconds again, and discharging strips and cooling; and (6) preparing the rubber compound obtained in the step (5) into a required tube blank through an extruder, and carrying out high-temperature shaping on the tube blank through a vulcanizing tank to obtain the product. The product is excellent in performance, extremely low in ion precipitation rate level and good in insulativity.

Description

Technical Field

[0001] The invention belongs to the technical field of cooling water pipes, and in particular relates to an extremely low ion precipitation high-insulation EPDM cooling water pipe and a production process thereof. Background Art

[0002] EPDM (ethylene propylene diene monomer rubber) cooling water pipes are widely used in the industrial and automotive fields, especially in cooling systems. Generally, the inner layer of EPDM cooling water pipes is made of black aging-resistant EPDM rubber, which has good chemical resistance and heat resistance. The reinforcement layer is made of high-strength synthetic fiber to provide strength and pressure resistance of the water pipe, while the outer layer is made of smooth EPDM rubber, and the surface may be needle-punched to enhance wear resistance and aging resistance.

[0003] EPDM cooling water pipes are suitable for injection mold cooling systems and other occasions that require circulating cooling water due to their unique properties. Due to their aging resistance and high temperature resistance, EPDM cooling water pipes are very suitable for automobile engine cooling systems, especially in commercial vehicle power systems with large heat dissipation.

[0004] With the development of technology, the performance of EPDM cooling water pipes has been comprehensively improved to meet higher heat dissipation requirements and more stringent operating conditions. Improved technical solutions include improving the ability of rubber materials to resist permanent compression deformation, improving low-temperature performance, improving high-temperature resistance, appropriately increasing the thickness of the hose wall, and ensuring that the difference in thickness between the inner and outer rubber layers is not too large. In addition, with the rapid development of the new energy vehicle field, it is also necessary to improve and enhance the ion precipitation rate and insulation performance of EPDM cooling water pipes during use. Summary of the invention

[0005] The purpose of the present invention is to provide an extremely low ion precipitation high insulation EPDM cooling water pipe and its production and preparation process, so as to better improve the formula of the EPDM cooling water pipe, thereby achieving low ion precipitation rate and high insulation, and provide related production and preparation processes.

[0006] In order to achieve the above object, the technical solution of the present invention is as follows.

[0007] The utility model discloses an extremely low ion precipitation high insulation EPDM cooling water pipe, which is made of the following components: EPDM 4045M, EPDM SK552-1, polyethylene glycol 4000, zinc oxide, stearic acid, antioxidant MB, carbon black N339, titanium dioxide, white carbon black 233, light calcium, paraffin oil, silane coupling agent KH550, bridging agent TAIC-70 and vulcanizing agent DCP.

[0008] Furthermore, the mass parts of the above ingredients are respectively: EPDM 4045M: 50 parts, EPDM SK552-1: 50 parts, polyethylene glycol 4000: 2 parts, zinc oxide: 5 parts, stearic acid: 1 part, antioxidant MB: 2 parts, carbon black N339: 35 parts, titanium dioxide: 20 parts, white carbon black 233: 45 parts, light calcium: 15 parts, paraffin oil: 56 parts, silane coupling agent KH550: 1.5 parts, bridging agent TAIC-70: 3 parts, and vulcanizing agent DCP: 3 parts.

[0009] Furthermore, the mass parts of the above ingredients are respectively: EPDM 4045M: 50 parts, EPDM SK552-1: 50 parts, polyethylene glycol 4000: 2 parts, zinc oxide: 5 parts, stearic acid: 1 part, antioxidant MB: 2 parts, carbon black N339: 28 parts, titanium dioxide: 20 parts, white carbon black 233: 50 parts, light calcium: 18 parts, paraffin oil: 52 parts, silane coupling agent KH550: 2.5 parts, bridging agent TAIC-70: 3.5 parts, and vulcanizing agent DCP: 3 parts.

[0010] Furthermore, the mass parts of the above ingredients are: EPDM 4045M: 50 parts, EPDM SK552-1: 50 parts, polyethylene glycol 4000: 2 parts, zinc oxide: 5 parts, stearic acid: 1 part, antioxidant MB: 2 parts, carbon black N339: 26 parts, titanium dioxide: 20 parts, white carbon black 233: 42 parts, light calcium: 20 parts, paraffin oil: 48 parts, silane coupling agent KH550: 2.5 parts, bridging agent TAIC-70: 3.5 parts, and vulcanizing agent DCP: 3.2 parts.

[0011] A production process for an extremely low ion precipitation high insulation EPDM cooling water pipe, specifically comprising the following process steps: (1) Put EPDM 4045M and EPDM SK552-1 into an internal mixer and mix for 30 seconds; (2) Add zinc oxide, stearic acid, polyethylene glycol, antioxidant MB, silane coupling agent KH550, paraffin oil, carbon black N339, titanium dioxide, white carbon black, and light calcium into an internal mixer and blend with the rubber material of step (1) for 180 seconds; (3) Lift the top bolt of the internal mixer and clean the material tray for 30 seconds; (4) Press the top bolt on the internal mixer to mix, and discharge the rubber when the mixing temperature reaches 130℃; (5) Cool the rubber compound mixed in step (4) to below 80°C, add the vulcanizing agent DCP and the bridging agent TAIC-70, mix again for 180 seconds, cool the slab, and place it for 24 hours before use; (6) The rubber compound obtained in step (5) is extruded to obtain the required tube blank, and the tube blank is then subjected to high-temperature shaping in a vulcanizer to obtain an extremely low ion precipitation high-insulation EPDM cooling water pipe.

[0012] The beneficial effect of the invention is that after many tests, the product performance obtained by the invention is excellent, the ion precipitation rate is extremely low, and the insulation is good, which is suitable for use in various occasions, especially in the field of new energy vehicles. DETAILED DESCRIPTION

[0013] The specific implementation modes of the present invention are described below in conjunction with embodiments to facilitate a better understanding of the present invention. Example 1

[0014] The extremely low ion precipitation high insulation EPDM cooling water pipe in this embodiment is made of the following mass components: 50 parts of EPDM 4045M, 50 parts of EPDM SK552-1, 2 parts of polyethylene glycol 4000, 5 parts of zinc oxide, 1 part of stearic acid, 2 parts of antioxidant MB, 35 parts of carbon black N339, 20 parts of titanium dioxide, 45 parts of white carbon black 233, 15 parts of light calcium, 56 parts of paraffin oil, 1.5 parts of silane coupling agent KH550, 3 parts of bridging agent TAIC-70, and 3 parts of vulcanizing agent DCP.

[0015] The production process of the extremely low ion precipitation high insulation EPDM cooling water pipe in this embodiment specifically includes the following process steps: (1) Place the above mass components of EPDM 4045M and EPDM SK552-1 into an internal mixer and mix for 30 seconds; (2) Add the above-mentioned components of zinc oxide, stearic acid, polyethylene glycol, antioxidant MB, silane coupling agent KH550, paraffin oil, carbon black N339, titanium dioxide, white carbon black, and light calcium into an internal mixer and blend with the rubber material of step (1) for 180 seconds; (3) Lift the top bolt of the internal mixer and clean the material tray for 30 seconds; (4) Press the top bolt on the internal mixer to mix, and discharge the rubber when the mixing temperature reaches 130℃; (5) Cooling the rubber compound mixed in step (4) to below 80°C, adding the above-mentioned vulcanizing agent DCP and bridging agent TAIC-70, mixing again for 180 seconds, cooling the rubber compound out of the slab, and leaving it for 24 hours before use; (6) The rubber compound obtained in step (5) is extruded to obtain the required tube blank, and the tube blank is then subjected to high-temperature shaping in a vulcanizer to obtain an extremely low ion precipitation high-insulation EPDM cooling water pipe. Example 2

[0016] The extremely low ion precipitation high insulation EPDM cooling water pipe in this embodiment is made of the following components: 50 parts of EPDM 4045M, 50 parts of EPDM SK552-1, 2 parts of polyethylene glycol 4000, 5 parts of zinc oxide, 1 part of stearic acid, 2 parts of antioxidant MB, 28 parts of carbon black N339, 20 parts of titanium dioxide, 50 parts of white carbon black 233, 18 parts of light calcium, 52 parts of paraffin oil, 2.5 parts of silane coupling agent KH550, 3.5 parts of bridging agent TAIC-70, and 3 parts of vulcanizing agent DCP.

[0017] The production process of the extremely low ion precipitation high insulation EPDM cooling water pipe in this embodiment specifically includes the following process steps: (1) Put EPDM 4045M and EPDM SK552-1 into an internal mixer and mix for 30 seconds; (2) Add zinc oxide, stearic acid, polyethylene glycol, antioxidant MB, silane coupling agent KH550, paraffin oil, carbon black N339, titanium dioxide, white carbon black, and light calcium into an internal mixer and blend with the rubber material of step (1) for 180 seconds; (3) Lift the top bolt of the internal mixer and clean the material tray for 30 seconds; (4) Press the top bolt on the internal mixer to mix, and discharge the rubber when the mixing temperature reaches 130℃; (5) Cool the rubber compound mixed in step (4) to below 80°C, add the vulcanizing agent DCP and the bridging agent TAIC-70, mix again for 180 seconds, cool the slab, and place it for 24 hours before use; (6) The rubber compound obtained in step (5) is extruded to obtain the required tube blank, and the tube blank is then subjected to high-temperature shaping in a vulcanizer to obtain an extremely low ion precipitation high-insulation EPDM cooling water pipe. Example 3

[0018] The extremely low ion precipitation high insulation EPDM cooling water pipe in this embodiment is made of the following components: 50 parts of EPDM 4045M, 50 parts of EPDM SK552-1, 2 parts of polyethylene glycol 4000, 5 parts of zinc oxide, 1 part of stearic acid, 2 parts of antioxidant MB, 26 parts of carbon black N339, 20 parts of titanium dioxide, 42 parts of white carbon black 233, 20 parts of light calcium, 48 parts of paraffin oil, 2.5 parts of silane coupling agent KH550, 3.5 parts of bridging agent TAIC-70, and 3.2 parts of vulcanizing agent DCP.

[0019] The production process of the extremely low ion precipitation high insulation EPDM cooling water pipe in this embodiment specifically includes the following process steps: (1) Put EPDM 4045M and EPDM SK552-1 into an internal mixer and mix for 30 seconds; (2) Add zinc oxide, stearic acid, polyethylene glycol, antioxidant MB, silane coupling agent KH550, paraffin oil, carbon black N339, titanium dioxide, white carbon black, and light calcium into an internal mixer and blend with the rubber material of step (1) for 180 seconds; (3) Lift the top bolt of the internal mixer and clean the material tray for 30 seconds; (4) Press the top bolt on the internal mixer to mix, and discharge the rubber when the mixing temperature reaches 130℃; (5) Cool the rubber compound mixed in step (4) to below 80°C, add the vulcanizing agent DCP and the bridging agent TAIC-70, mix again for 180 seconds, cool the slab, and place it for 24 hours before use; (6) The rubber compound obtained in step (5) is extruded to obtain the required tube blank, and the tube blank is then subjected to high-temperature shaping in a vulcanizer to obtain an extremely low ion precipitation high-insulation EPDM cooling water pipe.

[0020] The performance tests were conducted on the products obtained in Example 1, Example 2 and Example 3, and the test results are as follows: (1) The tested tensile strength is 10 MPa, the elongation at break is 280%, and the hardness is 69.

[0021] (2) After soaking in deionized water at 125℃ for 188h, the amount of ions released is: Ca ion 0.6~1.0ppm, SO4 2- Ions: 0~3ppm, Al ions: -0.06~0.01ppm, Fe ions: -0.011~-0.007ppm, Cl ions: 3.5~4.0ppm, the ion precipitation rate is extremely low.

[0022] The above is a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. An extremely low ion precipitation high insulation EPDM cooling water pipe, characterized by: The following components are used for batching: EPDM 4045M, EPDM SK552-1, polyethylene glycol 4000, zinc oxide, stearic acid, antioxidant MB, carbon black N339, titanium dioxide, white carbon black 233, light calcium, paraffin oil, silane coupling agent KH550, bridging agent TAIC-70, and vulcanizing agent DCP.

2. The extremely low ion precipitation high insulation EPDM cooling water pipe according to claim 1 is characterized by: The ingredients are respectively in parts by weight: 50 parts of EPDM 4045M, 50 parts of EPDM SK552-1, 2 parts of polyethylene glycol 4000, 5 parts of zinc oxide, 1 part of stearic acid, 2 parts of antioxidant MB, 35 parts of carbon black N339, 20 parts of titanium dioxide, 45 parts of white carbon black 233, 15 parts of light calcium, 56 parts of paraffin oil, 1.5 parts of silane coupling agent KH550, 3 parts of bridging agent TAIC-70 and 3 parts of vulcanizing agent DCP.

3. The extremely low ion precipitation high insulation EPDM cooling water pipe according to claim 1 is characterized by: The ingredients are respectively in parts by weight: 50 parts of EPDM 4045M, 50 parts of EPDM SK552-1, 2 parts of polyethylene glycol 4000, 5 parts of zinc oxide, 1 part of stearic acid, 2 parts of antioxidant MB, 28 parts of carbon black N339, 20 parts of titanium dioxide, 50 parts of white carbon black 233, 18 parts of light calcium, 52 parts of paraffin oil, 2.5 parts of silane coupling agent KH550, 3.5 parts of bridging agent TAIC-70 and 3 parts of vulcanizing agent DCP.

4. The extremely low ion precipitation high insulation EPDM cooling water pipe according to claim 1 is characterized by: The ingredients are respectively in parts by weight: 50 parts of EPDM 4045M, 50 parts of EPDM SK552-1, 2 parts of polyethylene glycol 4000, 5 parts of zinc oxide, 1 part of stearic acid, 2 parts of antioxidant MB, 26 parts of carbon black N339, 20 parts of titanium dioxide, 42 parts of white carbon black 233, 20 parts of light calcium, 48 parts of paraffin oil, 2.5 parts of silane coupling agent KH550, 3.5 parts of bridging agent TAIC-70, and 3.2 parts of vulcanizing agent DCP.

5. A production process for an extremely low ion precipitation high insulation EPDM cooling water pipe, specifically comprising the following process steps: (1) Put EPDM 4045M and EPDM SK552-1 into an internal mixer and mix for 30 seconds; (2) Add zinc oxide, stearic acid, polyethylene glycol, antioxidant MB, silane coupling agent KH550, paraffin oil, carbon black N339, titanium dioxide, white carbon black, and light calcium into an internal mixer and blend with the rubber material of step (1) for 180 seconds; (3) Lift the top bolt of the internal mixer and clean the material tray for 30 seconds; (4) Press the top bolt on the internal mixer to mix, and discharge the rubber when the mixing temperature reaches 130℃; (5) Cool the rubber compound mixed in step (4) to below 80°C, add the vulcanizing agent DCP and the bridging agent TAIC-70, mix again for 180 seconds, cool the slab, and place it for 24 hours before use; (6) The rubber compound obtained in step (5) is extruded to obtain the required tube blank, and the tube blank is then subjected to high-temperature shaping in a vulcanizer to obtain an extremely low ion precipitation high-insulation EPDM cooling water pipe.