阅读说明：本技术 一种汽车充电线用阻燃绝缘高导热tpe材料及其制备方法 (Flame-retardant, insulating and high-thermal-conductivity TPE material for automobile charging wire and preparation method thereof ) 是由 翁伟 于 2020-12-15 设计创作，主要内容包括：本发明公开了一种汽车充电线用阻燃绝缘高导热TPE材料及其制备方法,所述阻燃绝缘高导热TPE材料包括：SEBS树脂50-80份,PE树脂5-40份,PP树脂1-40份,POE树脂1-30份,PPO树脂1-20份,白油10-30份,抗氧剂0.5-1份,润滑剂2-10份,阻燃剂50-100份,复配导热填料10-60份；其中,复配导热填料是由5-20份的片状填料与5-40份颗粒状填料复配得到的；片状填料为六方氮化硼,颗粒状填料选自α-氧化铝、氮化铝、氧化镁、氧化锌、碳酸钙、二氧化硅、氢氧化铝中的一种或多种；氮化铝经过防水解处理,其他填料经过硅烷偶联剂处理。本发明的汽车充电线用阻燃绝缘高导热TPE材料,比常规的线缆材料具有更高的导热系数,具有良好的耐热和散热性能,用于制备汽车充电线时能够延长线缆的使用寿命。(The invention discloses a flame-retardant, insulating and high-thermal-conductivity TPE material for an automobile charging wire and a preparation method thereof, wherein the flame-retardant, insulating and high-thermal-conductivity TPE material comprises the following components in parts by weight: 50-80 parts of SEBS resin, 5-40 parts of PE resin, 1-40 parts of PP resin, 1-30 parts of POE resin, 1-20 parts of PPO resin, 10-30 parts of white oil, 0.5-1 part of antioxidant, 2-10 parts of lubricant, 50-100 parts of flame retardant and 10-60 parts of compound heat-conducting filler; wherein, the compound heat conduction filler is obtained by compounding 5-20 parts of flaky filler and 5-40 parts of granular filler; the flaky filler is hexagonal boron nitride, and the granular filler is selected from one or more of alpha-alumina, aluminum nitride, magnesium oxide, zinc oxide, calcium carbonate, silicon dioxide and aluminum hydroxide; the aluminum nitride is subjected to hydrolysis prevention treatment, and other fillers are treated by a silane coupling agent. Compared with the conventional cable material, the flame-retardant, insulating and high-thermal-conductivity TPE material for the automobile charging wire has a higher thermal conductivity coefficient, has good heat resistance and heat dissipation performance, and can prolong the service life of the cable when used for preparing the automobile charging wire.)

1. The utility model provides a car charging wire is with fire-retardant insulating high heat conduction TPE material which characterized in that includes following component by weight:

wherein, the compound heat conduction filler is obtained by compounding 5-20 parts of flaky filler and 5-40 parts of granular filler; the flaky filler is hexagonal boron nitride, and the granular filler is selected from one or more of alpha-alumina, aluminum nitride, magnesium oxide, zinc oxide, calcium carbonate, silicon dioxide and aluminum hydroxide; the aluminum nitride is subjected to hydrolysis prevention treatment, and other fillers are treated by a silane coupling agent.

2. The flame-retardant, insulating and high thermal conductive TPE material for the charging wire of the automobile as claimed in claim 1, wherein the particulate filler is selected from two of alpha-alumina, aluminum nitride, magnesium oxide, zinc oxide, calcium carbonate, silicon dioxide and aluminum hydroxide, wherein one of the particulate fillers has a particle size of 40-50 μm, and the other particulate filler has a particle size of 5-15 μm.

3. The flame-retardant, insulating and high-thermal-conductivity TPE material for the charging wire of the automobile as claimed in claim 1, wherein the SEBS resin is linear SEBS, and the PE resin is one of HDPE and LDPE.

4. The flame-retardant, insulating and high thermal conductive TPE material for the charging wire of the automobile as claimed in claim 1, wherein the PP resin is random copolymerized PP.

5. The flame-retardant, insulating and high-thermal-conductivity TPE material for the charging wire of the automobile as claimed in claim 1, wherein the POE resin is ethylene-butylene copolymer POE.

6. The flame-retardant, insulating and high-thermal-conductivity TPE material for the charging wire of the automobile as claimed in claim 1, wherein the PPO resin is low molecular weight PPO resin powder, and the molecular weight is below 2500.

7. The TPE material as claimed in claim 1, wherein the antioxidant is one or two of tris [2, 4-di-tert-butylphenyl ] phosphite, pentaerythrityl tetrakis [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ], N-octadecyl beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate and N, N' -bis- (3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionyl) hexanediamine.

8. The flame-retardant, insulating and high-thermal-conductivity TPE material for the charging wire of the automobile as claimed in claim 1, wherein the lubricant is one or two of stearate lubricant and silicone powder.

9. The flame-retardant, insulating and high thermal conductive TPE material for the charging wire of the automobile as claimed in claim 1, wherein the flame retardant is one or more of diethyl aluminum hypophosphite, resorcinol bis (diphenyl phosphate), oligomeric aryl phosphate, melamine cyanurate salt, and diphenyl isooctyl phosphate.

10. The preparation method of the flame-retardant, insulating and high thermal conductive TPE material for the charging wire of the automobile according to any one of claims 1 to 9, characterized by comprising the following steps:

mixing SEBS resin and white oil in a mixer, and adding the white oil for multiple times; cooling to normal temperature after mixing, adding the rest materials together, and mixing uniformly; and (3) after discharging, adding the mixture into a double-screw extruder to extrude and granulate, thus obtaining the flame-retardant, insulating and high-heat-conductivity TPE material for the automobile charging wire.

Technical Field

The invention relates to the technical field of cable materials, in particular to a flame-retardant, insulating and high-thermal-conductivity TPE material for an automobile charging wire and a preparation method thereof.

Background

In recent years, with the continuous development of new energy electric automobiles, the endurance mileage is longer and longer, but the time required for charging is much longer than the time required for refueling, which brings trouble to frequent vehicle use and long-distance vehicle owners, the low charging efficiency restricts the large-scale popularization of electric automobiles, and mileage anxiety still exists. Quick charging is realized in a transmission environment of high voltage and large current, and the high voltage and large current inevitably bring about the heating problem of a charging gun head, a cable and the like. And conventional cable macromolecular material coefficient of heat conductivity is all very low, if use current charging wire material, has the cable to generate heat big, the slow problem of heat dissipation, and this has accelerated ageing, the fracture of cable, has reduced the cable and even whole life who fills electric pile to there is the potential safety hazard such as electric leakage, spontaneous combustion. To solve the problem of heat generation, the cable material is required to have the functions of rapid heat conduction and heat dissipation.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a flame-retardant, insulating and high-thermal-conductivity TPE material for an automobile charging wire, which has higher heat resistance and heat conductivity coefficient than conventional cable materials, has good heat dissipation performance, and can prolong the service life of a cable when used for preparing the automobile charging wire.

In order to solve the technical problems, the invention provides the following technical scheme:

the invention provides a flame-retardant, insulating and high-thermal-conductivity TPE material for an automobile charging wire, which comprises the following components in parts by weight:

wherein, the compound heat conduction filler is obtained by compounding 5-20 parts of flaky filler and 5-40 parts of granular filler; the flaky filler is hexagonal boron nitride, and the granular filler is selected from one or more of alpha-alumina, aluminum nitride, magnesium oxide, zinc oxide, calcium carbonate, silicon dioxide and aluminum hydroxide; the aluminum nitride is subjected to hydrolysis prevention treatment, and other fillers are treated by a silane coupling agent.

According to the invention, the compound heat-conducting filler is obtained by compounding one flaky filler and at least one granular filler, and the granular filler is filled between the flaky fillers, so that a heat-conducting network is connected, and the heat-conducting performance is favorably improved.

Further, the particulate filler is selected from two of alpha-alumina, aluminum nitride, magnesium oxide, zinc oxide, calcium carbonate, silica, and aluminum hydroxide, wherein one of the particulate fillers has a particle size of 40 to 50 μm, and the other particulate filler has a particle size of 5 to 15 μm. The granular fillers with two different particle sizes are compounded, so that the small granular fillers are filled between the large granular fillers, and the particles are contacted more tightly, thereby increasing the stacking density and being beneficial to further improving the heat-conducting property.

In addition, the white oil is added into the formula, so that the flexibility of the cable material is ensured; by adding POE resin, the toughness of the TPE material is increased, and the tear resistance of the material is ensured; through adding PPO resin, the heat resistance of the material is improved, and the PPO resin and the flame retardant can play a role in flame retardance in a synergistic manner, so that the dosage of the flame retardant is reduced.

Furthermore, the SEBS resin is linear SEBS, and the PE resin is one of HDPE and LDPE.

Further, the PP resin is random copolymerization PP.

Further, the POE resin is ethylene-butylene copolymerization POE.

Furthermore, the PPO resin is low molecular weight PPO resin powder, the molecular weight of the PPO resin is below 2500, which is less than one tenth of that of the conventional PPO resin. And the low-molecular-weight PPO resin powder is adopted, so that the flame retardance and the heat resistance of the TPE material are improved.

Further, the white oil is one of plasticizer industrial white oils.

Further, the antioxidant is one or two of tris [2, 4-di-tert-butylphenyl ] phosphite (antioxidant 168), pentaerythrityl tetrakis [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ] (antioxidant 1010), N-octadecyl beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate (antioxidant 1076), and N, N' -bis- (3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionyl) hexanediamine (antioxidant 1098).

Further, the lubricant is one or two of stearate and silicone powder.

Further, the flame retardant is one or more of aluminum diethylphosphinate, resorcinol bis (diphenyl phosphate), oligomeric aryl phosphate, melamine cyanurate salt and diphenyl isooctyl phosphate.

The invention also provides a preparation method of the flame-retardant, insulating and high-thermal-conductivity TPE material, which specifically comprises the following steps: firstly, mixing SEBS resin and white oil in a mixer, slowly adding the white oil for multiple times, cooling to normal temperature after completion, adding the rest materials together, uniformly mixing, discharging, adding into a double-screw extruder, and extruding and granulating to obtain the flame-retardant, insulating and high-heat-conductivity TPE material.

Compared with the prior art, the invention has the beneficial effects that:

according to the flame-retardant, insulating and high-thermal-conductivity TPE material for the automobile charging wire, due to the introduction of the components such as the compound heat-conducting filler, the PP resin, the low-molecular-weight PPO resin and the like, the heat-resistant temperature of the material is improved, the flame-retardant effect is also improved, and the stable V0 grade is achieved; under the same dosage, the heat conductivity coefficient of the compounded heat-conducting filler is higher than that of a single filler, reaches 0.7-0.9W/(m.K), is far higher than that of a conventional cable material by 0.2-0.3W/(m.K), has a good heat-radiating effect, and reduces the cost; meanwhile, the flame retardant and tear resistant performance of the TPE material also meets the requirements of cable materials.

Detailed Description

The present invention is further described below in conjunction with specific examples to enable those skilled in the art to better understand the present invention and to practice it, but the examples are not intended to limit the present invention.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In the following examples and comparative examples, the experimental methods used were conventional unless otherwise specified, and the materials, reagents and the like used were commercially available without otherwise specified.

Example 1

The embodiment provides a flame-retardant, insulating and high-thermal-conductivity TPE material for an automobile charging wire, and the preparation method comprises the following steps:

according to the proportion shown in the table 1, the SEBS resin and the white oil are mixed for 30min at 60 ℃ in a high-speed mixer, the white oil is slowly added for multiple times, and then the mixture is cooled to normal temperature. And then adding the rest materials together, uniformly mixing, discharging, adding into a double-screw extruder, and extruding and granulating at 180 ℃ to obtain the flame-retardant, insulating and high-heat-conductivity TPE material.

Table 1 proportioning of flame-retardant, insulating and high thermal conductivity TPE material of example 1

Example 2

The embodiment provides a flame-retardant, insulating and high-thermal-conductivity TPE material for an automobile charging wire, and the preparation method comprises the following steps:

according to the proportion shown in the table 2, the SEBS resin and the white oil are mixed for 30min at 60 ℃ in a high-speed mixer, the white oil is slowly added for multiple times, and then the mixture is cooled to normal temperature. And then adding the rest materials together, uniformly mixing, discharging, adding into a double-screw extruder, and extruding and granulating at 180 ℃ to obtain the flame-retardant, insulating and high-heat-conductivity TPE material.

Table 2 proportioning of flame-retardant, insulating and high thermal conductivity TPE material of example 2

Comparative example 1

The comparative example provides a TPE material for automobile charging wires, and the preparation method comprises the following steps:

according to the proportion shown in the table 3, the SEBS resin and the white oil are mixed for 30min at 60 ℃ in a high-speed mixer, the white oil is slowly added for multiple times, and then the mixture is cooled to normal temperature. And then adding the rest materials together, uniformly mixing, discharging, adding into a double-screw extruder, and extruding and granulating at 180 ℃ to obtain the TPE material.

TABLE 3 formulation of TPE material for comparative example 1

Performance detection

The TPE materials of examples 1-2 and comparative example 1 were tested and the results are shown in the following table.

Test items	Detection standard	Example 1	Example 2	Comparative example 1
					Hardness Shore A	ASTM D2240	86	92	83
Tensile strength MPa	ASTM D412	11	8	9
					Elongation at break%	ASTM D412	430	360	380
Tear Strength kN/m	ASTM D624	45	36	37
					Thermal conductivity W/(m.K)	ISO 22007-2	0.7	0.9	0.4
Flame retardant properties	UL94	V0	V0	V0

The results in the table show that the flame-retardant, insulating and high-thermal-conductivity TPE material greatly improves the thermal conductivity of the material by adding specific compounded different types of thermal-conductive fillers under the condition of little influence on the mechanical properties, has a thermal conductivity coefficient of 0.7-0.9W/(m.K), is higher than a comparative example, is far higher than that of a conventional cable material by 0.2-0.3W/(m.K), and has a good heat dissipation effect; and secondly, the flame retardant and tearing performance of the material also meets the requirements of the cable material.

The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. The equivalent substitution or change made by the technical personnel in the technical field on the basis of the invention is all within the protection scope of the invention. The protection scope of the invention is subject to the claims.