Environment-friendly high-flame-retardant cable material and preparation method thereof

Abstract

The invention discloses an environment-friendly high-flame-retardant cable material and a preparation method thereof, and relates to the technical field of cable materials. Comprising the following raw materials in parts by weight: 100 parts of thermoplastic polyester elastomer, 10 to 15 parts of benzene ring-containing hyperbranched polyborosilazane, 8 to 10 parts of 3-trihydroxymethyl methylamino-2-hydroxypropanesulfonic acid, 1 to 3 parts of phosphorus pentoxide, 0.5 to 0.8 part of polyphosphoric acid, 3 to 5 parts of melamine phosphate, 25 to 35 parts of modified filler, 3 to 5 parts of compatibilizer, 0.8 to 1.5 parts of antioxidant and 0.5 to 0.8 part of lubricant. 4-6 parts of a plasticizer and 1-2 parts of a light stabilizer. The cable material is remarkable in flame retardant effect, excellent in mechanical property and environmental protection performance, good in aging resistance and long in service life.

Description

Technical Field

[0001] The present invention relates to the technical field of cable materials, and particularly to an environmentally friendly high flame-retardant cable material and a preparation method thereof. Background Art

[0002] With the continuous growth of the demand for electricity in modern society, as a key carrier for power transmission, the safety and environmental friendliness of cables have attracted increasing attention. Among the numerous performance requirements of cables, the flame-retardant performance is crucial, which can effectively prevent the spread of fires and ensure the safety of personnel's lives and property.

[0003] The existing flame-retardant cables mainly achieve the flame-retardant effect by adding flame retardants to the manufacturing materials. Halogen-containing flame retardants are a relatively common type among many flame retardants. Although such flame retardants have a significant flame-retardant effect, they will release a large amount of toxic and harmful gases such as hydrogen halide during the combustion process. These gases not only seriously pollute the environment but also hinder the evacuation of personnel at the fire scene, increasing the difficulty of rescue and posing a great threat to human health. It is precisely in this situation that halogen-free flame retardants represented by inorganic hydroxides such as aluminum hydroxide and magnesium hydroxide have been widely used. Such flame retardants have better environmental friendliness, but often need to be added in large amounts to achieve the ideal flame-retardant effect, which will cause the mechanical properties and processing properties of the cable material to decline, thereby affecting the actual use performance and service life of the cable. In addition, due to compatibility problems, these flame retardants will exude during the long-term use of the flame-retardant cables, affecting the performance stability and service life of the products. Other types of flame-retardant cables on the market also more or less have technical defects such as insufficient aging resistance, poor mechanical properties, short service life, and the need for further improvement in flame retardancy and environmental friendliness.

[0004] In order to solve the above problems, a Chinese invention patent with the authorization announcement number CN102485792B discloses an environmentally friendly flame-retardant cable material, including the following components and parts by weight: thermoplastic elastomer 40 - 70, PVC resin 10 - 30, nitrogen / phosphorus composite flame retardant 10 - 14, antioxidant 0.5 - 2, plasticizer 2 - 15, heat stabilizer 0.2 - 0.6, reinforcing agent 2 - 3. This invention uses the mixture of TPEE and PVC to prepare the cable material. On the one hand, it improves the low-temperature flexibility of PVC, and increases the tensile strength, elongation at break, hardness, and tear strength. On the other hand, PVC can improve the flame-retardant performance of the composite, and an ideal flame-retardant effect can be achieved without adding too much flame retardant. Moreover, PVC is much cheaper than TPEE, which can reduce costs. The flame retardant uses the compounding of nitrogen-based and phosphorus-based flame retardants, and a reinforcing agent is added to improve the mechanical properties of the composite material, which can be applied to the fields of middle and high-end wire and cable sheaths and optical fiber sheaths. However, the base material PVC still contains halogens, and the environmental friendliness needs to be further improved.

[0005] It can be seen that there is still a need in the art for an environmentally friendly high-flame-retardant cable material with significant flame-retardant effect, excellent mechanical and environmental performance, good aging resistance, and long service life, as well as a preparation method therefor. Summary of the Invention

[0006] The object of the present invention is to provide an environmentally friendly high-flame-retardant cable material with significant flame-retardant effect, excellent mechanical and environmental performance, good aging resistance, and long service life, as well as a preparation method therefor, in order to overcome the deficiencies of the prior art.

[0007] To achieve the above object, the technical solution adopted by the present invention is: an environmentally friendly high-flame-retardant cable material, which is made from the following raw materials in parts by weight: 100 parts of thermoplastic polyester elastomer, 10 - 15 parts of benzene-ring-containing hyperbranched polyborosilazane, 8 - 10 parts of 3-trimethylolmethylamine-2-hydroxypropane sulfonic acid, 1 - 3 parts of phosphorus pentoxide, 0.5 - 0.8 parts of polyphosphoric acid, 3 - 5 parts of melamine phosphate, 25 - 35 parts of modified filler, 3 - 5 parts of compatibilizer, 0.8 - 1.5 parts of antioxidant, 0.5 - 0.8 parts of lubricant, 4 - 6 parts of plasticizer, and 1 - 2 parts of light stabilizer.

[0008] Preferably, the thermoplastic polyester elastomer is 3078.

[0009] Preferably, there are no special requirements for the source of the benzene-ring-containing hyperbranched polyborosilazane. In one embodiment of the present invention, the benzene-ring-containing hyperbranched polyborosilazane is prepared according to the method of Example 1 of the Chinese invention patent with the application publication number CN109251038A.

[0010] Preferably, the preparation method of the modified filler includes the following steps: uniformly mixing aluminum hydroxide flame retardant VK-LA50, nano-titanium dioxide, and nano-boron fibers, dispersing them in an organic solvent, and then adding 4-methyl-5-vinylthiazole, vinyltrimethoxysilane, 1,3,5-triacryloyl hexahydro-1,3,5-triazine, diphenyl(4-vinylphenyl)phosphine oxide, and an initiator thereto. Stir and react at 60 - 70 °C for 3 - 6 h in an inert gas atmosphere. After the reaction, the solvent is removed by rotary evaporation to obtain the modified filler.

[0011] Preferably, the mass ratio of the aluminum hydroxide flame retardant VK-LA50, nano-titanium dioxide, nano-boron fibers, organic solvent, 4-methyl-5-vinylthiazole, vinyltrimethoxysilane, 1,3,5-triacryloyl hexahydro-1,3,5-triazine, diphenyl(4-vinylphenyl)phosphine oxide, and initiator is (3 - 5):1:(0.8 - 1.2):(20 - 30):(0.3 - 0.5):0.5:0.3:(0.3 - 0.5):0.03.

[0012] Preferably, the particle size of the nano-titanium dioxide is 20 - 60 nm; the average diameter of the nano-boron fiber is 10 - 100 nm, and the aspect ratio is (25 - 35):1.

[0013] Preferably, the organic solvent is N,N-dimethylformamide; the initiator is azobisisobutyronitrile; the inert gas is any one of nitrogen, helium, neon, and argon.

[0014] Preferably, the compatibilizer is maleic anhydride grafted polypropylene, and it is MAH-g-PP of the grade EXXELOR PO1020 provided by Exxon in the United States.

[0015] Preferably, the antioxidant is at least one of antioxidant 168, antioxidant 1010, and antioxidant 1076.

[0016] Preferably, the lubricant is at least one of ethylene bisstearamide and butyl stearate.

[0017] Preferably, the light stabilizer is at least one of hindered amine light stabilizer HS-944 and ultraviolet absorber UV-531.

[0018] Another object of the present invention is to provide a method for preparing the environmentally friendly high flame-retardant cable material, comprising the following steps: mixing the raw materials in parts by weight evenly to obtain a mixed material, then adding the mixed material into a twin-screw extruder for co-mixing and extrusion, and then granulating to obtain the environmentally friendly high flame-retardant cable material.

[0019] Preferably, the extrusion temperature of the twin-screw extruder is 190 - 205 °C.

[0020] Preferably, the screw rotation speed of the twin-screw extruder is 60 - 120 r / min.

[0021] Due to the application of the above technical solution, the present invention has the following beneficial effects:

[0022] (1) The method for preparing the environmentally friendly high flame-retardant cable material disclosed by the present invention has a simple process, convenient operation and control, high manufacturing efficiency and finished product qualification rate, low dependence on equipment, is suitable for continuous large-scale production, and has high popularization and application value.

[0023] (2) The environmentally friendly high flame-retardant cable material disclosed by the present invention is made from the following raw materials in parts by weight: 100 parts of thermoplastic polyester elastomer, 10 - 15 parts of benzene ring-containing hyperbranched polyborosilazane, 8 - 10 parts of 3-trimethylolmethylamine-2-hydroxypropanesulfonic acid, 1 - 3 parts of phosphorus pentoxide, 0.5 - 0.8 parts of polyphosphoric acid, 3 - 5 parts of melamine phosphate, 25 - 35 parts of modified filler, 3 - 5 parts of compatibilizer, 0.8 - 1.5 parts of antioxidant, 0.5 - 0.8 parts of lubricant, 4 - 6 parts of plasticizer, and 1 - 2 parts of light stabilizer. Through the mutual cooperation and joint action of the raw materials, the cable material prepared has a remarkable flame-retardant effect, excellent mechanical and environmental protection properties, good aging resistance, and a long service life. The sulfonic acid group on 3-trimethylolmethylamine-2-hydroxypropanesulfonic acid can chemically react with the benzene ring-containing substrate under the catalytic action of phosphorus pentoxide and polyphosphoric acid, introducing polar groups such as hydroxyl groups, effectively improving the compatibility between the raw materials, and further enhancing the mechanical and aging resistance of the cable material, thereby further extending its service life; at the same time, the sulfur element introduced by it can further improve the flame-retardant effect in cooperation with other active elements. The addition of benzene ring-containing hyperbranched polyborosilazane, in cooperation with other raw materials, can effectively improve the flame-retardant effect; at the same time, it can also improve the mechanical and aging resistance.

[0024] (3) The environmentally friendly high flame-retardant cable material disclosed by the present invention, the modified filler is co-modified by 4-methyl-5-vinylthiazole, vinyltrimethoxysilane, 1,3,5-triacryloylhexahydro-1,3,5-triazine, and diphenyl(4-vinylphenyl)phosphine oxide. At the same time, the introduced thiazolyl, trimethoxysilyl, triazinyl, and phenylphosphine oxide groups, under the multiple actions of electronic effect, steric effect, and conjugation effect, make the prepared product have a more remarkable flame-retardant effect, more excellent mechanical and aging resistance, and can improve the compatibility between the filler and the substrate and the dispersion uniformity of the filler through modification. The filler includes aluminum hydroxide flame retardant VK-LA50, nano-titanium dioxide, and nano-boron fiber; through the mutual cooperation of these fillers, the prepared cable material has better mechanical properties and a more remarkable flame-retardant effect.

[0025] (4) The environmentally friendly high flame-retardant cable material disclosed by the present invention does not contain halogens in the selected raw materials, nor does it contain substances that are highly harmful to the environment and human health, and has better environmental protection and is more green and safe to use. Specific embodiments

[0026] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments in the following description are only examples, and those skilled in the art can think of other obvious variations.

[0027] Example 1

[0028] An environmentally friendly high flame retardant cable compound is made from the following raw materials by weight: 100 parts of thermoplastic polyester elastomer, 10 parts of benzene ring-containing hyperbranched polyborosilazane, 8 parts of 3-trimethylolmethylamine-2-hydroxypropanesulfonic acid, 1 part of phosphorus pentoxide, 0.5 part of polyphosphoric acid, 3 parts of melamine phosphate, 25 parts of modified filler, 3 parts of compatibilizer, 0.8 part of antioxidant, 0.5 part of lubricant, 4 parts of plasticizer, and 1 part of light stabilizer.

[0029] The thermoplastic polyester elastomer is 3078; the benzene ring-containing hyperbranched polyborosilazane is prepared by the method of Example 1 of the Chinese invention patent with the application publication number CN109251038A.

[0030] The preparation method of the modified filler includes the following steps: Mix aluminum hydroxide flame retardant VK-LA50, nano-titanium dioxide, and nano-boron fibers evenly, disperse them in an organic solvent, then add 4-methyl-5-vinylthiazole, vinyltrimethoxysilane, 1,3,5-triacryloylhexahydro-1,3,5-triazine, diphenyl(4-vinylphenyl)phosphine oxide, and initiator thereto, and stir and react at 60 °C for 3 h in an inert gas atmosphere. After the reaction, the solvent is removed by rotary evaporation to obtain the modified filler; the mass ratio of aluminum hydroxide flame retardant VK-LA50, nano-titanium dioxide, nano-boron fibers, organic solvent, 4-methyl-5-vinylthiazole, vinyltrimethoxysilane, 1,3,5-triacryloylhexahydro-1,3,5-triazine, diphenyl(4-vinylphenyl)phosphine oxide, and initiator is 3:1:0.8:20:0.3:0.5:0.3:0.3:0.03; the particle size of the nano-titanium dioxide is 20 nm; the average diameter of the nano-boron fibers is 10 nm, and the aspect ratio is 25:1; the organic solvent is N,N-dimethylformamide; the initiator is azobisisobutyronitrile; the inert gas is nitrogen.

[0031] The compatibilizer is maleic anhydride grafted polypropylene, selected from MAH-g-PP with the trade name EXXELOR PO1020 provided by Exxon in the United States; the antioxidant is antioxidant 168; the lubricant is ethylene bis-stearamide; the light stabilizer is hindered amine light stabilizer HS-944.

[0032] A preparation method of the environmentally friendly high flame retardant cable compound includes the following steps: Mix the raw materials evenly by weight to obtain a mixed material, then add the mixed material into a twin-screw extruder for co-extrusion, and then granulate to obtain the environmentally friendly high flame retardant cable compound; the extrusion temperature of the twin-screw extruder is 190 °C; the screw speed of the twin-screw extruder is 60 r / min.

[0033] Example 2

[0034] An environmentally friendly high flame-retardant cable compound is made from the following raw materials in parts by weight: 100 parts of thermoplastic polyester elastomer, 12 parts of benzene ring-containing hyperbranched polyborosilazane, 8.5 parts of 3-trimethylolmethylamine-2-hydroxypropanesulfonic acid, 1.5 parts of phosphorus pentoxide, 0.6 part of polyphosphoric acid, 3.5 parts of melamine phosphate, 27 parts of modified filler, 3.5 parts of compatibilizer, 1 part of antioxidant, 0.6 part of lubricant, 4.5 parts of plasticizer, and 1.2 parts of light stabilizer.

[0035] The thermoplastic polyester elastomer is 3078; the benzene ring-containing hyperbranched polyborosilazane is prepared by the method of Example 1 of the Chinese invention patent with the application publication number CN109251038A.

[0036] The preparation method of the modified filler includes the following steps: Mix aluminum hydroxide flame retardant VK-LA50, nano-titanium dioxide, and nano-boron fibers evenly, disperse them in an organic solvent, then add 4-methyl-5-vinylthiazole, vinyltrimethoxysilane, 1,3,5-triacryloyl hexahydro-1,3,5-triazine, diphenyl(4-vinylphenyl)phosphine oxide, and initiator thereto, and stir and react at 63 °C for 4 h in an inert gas atmosphere. After the reaction is completed, the solvent is removed by rotary evaporation to obtain the modified filler; the mass ratio of aluminum hydroxide flame retardant VK-LA50, nano-titanium dioxide, nano-boron fibers, organic solvent, 4-methyl-5-vinylthiazole, vinyltrimethoxysilane, 1,3,5-triacryloyl hexahydro-1,3,5-triazine, diphenyl(4-vinylphenyl)phosphine oxide, and initiator is 3.5:1:0.9:23:0.35:0.5:0.3:0.35:0.03; the particle size of the nano-titanium dioxide is 30 nm; the average diameter of the nano-boron fibers is 30 nm, and the aspect ratio is 27:1; the organic solvent is N,N-dimethylformamide; the initiator is azobisisobutyronitrile; the inert gas is helium.

[0037] The compatibilizer is maleic anhydride grafted polypropylene, selected from MAH-g-PP with the trade name EXXELOR PO1020 provided by Exxon in the United States; the antioxidant is antioxidant 1010; the lubricant is butyl stearate; the light stabilizer is ultraviolet absorber UV-531.

[0038] A preparation method of the environmentally friendly high flame-retardant cable compound includes the following steps: Mix the raw materials evenly by weight to obtain a mixed material, then add the mixed material into a twin-screw extruder for co-mixing and extrusion, and then granulate to obtain the environmentally friendly high flame-retardant cable compound; the extrusion temperature of the twin-screw extruder is 195 °C; the screw speed of the twin-screw extruder is 80 r / min.

[0039] Example 3

[0040] An environmentally friendly high flame-retardant cable compound is made from the following raw materials in parts by weight: 100 parts of thermoplastic polyester elastomer, 13 parts of benzene ring-containing hyperbranched polyborosilazane, 9 parts of 3-trimethylolmethylamine-2-hydroxypropanesulfonic acid, 2 parts of phosphorus pentoxide, 0.65 part of polyphosphoric acid, 4 parts of melamine phosphate, 30 parts of modified filler, 4 parts of compatibilizer, 1.2 parts of antioxidant, 0.65 part of lubricant, 5 parts of plasticizer, and 1.5 parts of light stabilizer.

[0041] The thermoplastic polyester elastomer is 3078; The benzene ring-containing hyperbranched polyborosilazane is prepared by the method of Example 1 of the Chinese invention patent with the application publication number CN109251038A.

[0042] The preparation method of the modified filler includes the following steps: After uniformly mixing aluminum hydroxide flame retardant VK-LA50, nano-titanium dioxide, and nano-boron fibers, disperse them in an organic solvent, and then add 4-methyl-5-vinylthiazole, vinyltrimethoxysilane, 1,3,5-triacryloyl hexahydro-1,3,5-triazine, diphenyl(4-vinylphenyl)phosphine oxide, and initiator thereto. Stir and react at 65 °C for 4.5 h in an inert gas atmosphere. After the reaction, rotary evaporate to remove the solvent to obtain the modified filler; The mass ratio of aluminum hydroxide flame retardant VK-LA50, nano-titanium dioxide, nano-boron fibers, organic solvent, 4-methyl-5-vinylthiazole, vinyltrimethoxysilane, 1,3,5-triacryloyl hexahydro-1,3,5-triazine, diphenyl(4-vinylphenyl)phosphine oxide, and initiator is 4:1:1:25:0.4:0.5:0.3:0.4:0.03; The particle size of the nano-titanium dioxide is 40 nm; The average diameter of the nano-boron fibers is 50 nm, and the aspect ratio is 30:1; The organic solvent is N,N-dimethylformamide; The initiator is azobisisobutyronitrile; The inert gas is neon.

[0043] The compatibilizer is maleic anhydride grafted polypropylene, selected from MAH-g-PP with the trade name EXXELOR PO1020 provided by Exxon in the United States; The antioxidant is antioxidant 1076; The lubricant is ethylene bisstearamide; The light stabilizer is hindered amine light stabilizer HS-944.

[0044] A preparation method of the environmentally friendly high flame-retardant cable compound includes the following steps: After uniformly mixing the raw materials in parts by weight, a mixed material is obtained, and then the mixed material is added to a twin-screw extruder for co-mixing and extrusion, and then pelletized to obtain the environmentally friendly high flame-retardant cable compound; The extrusion temperature of the twin-screw extruder is 200 °C; The screw speed of the twin-screw extruder is 90 r / min.

[0045] Example 4

[0046] An environmentally friendly high flame retardant cable material is made from the following raw materials by weight: 100 parts of thermoplastic polyester elastomer, 14 parts of benzene ring-containing hyperbranched polyborosilazane, 9.5 parts of 3-trimethylolmethylamine-2-hydroxypropane sulfonic acid, 2.5 parts of phosphorus pentoxide, 0.75 part of polyphosphoric acid, 4.5 parts of melamine phosphate, 33 parts of modified filler, 4.5 parts of compatibilizer, 1.3 parts of antioxidant, 0.75 part of lubricant, 5.5 parts of plasticizer, 1.8 parts of light stabilizer.

[0047] The thermoplastic polyester elastomer is 3078; the benzene ring-containing hyperbranched polyborosilazane is prepared by the method of Example 1 of the Chinese invention patent with the application publication number CN109251038A.

[0048] The preparation method of the modified filler includes the following steps: After uniformly mixing aluminum hydroxide flame retardant VK-LA50, nano-titanium dioxide, and nano-boron fibers, disperse them in an organic solvent, and then add 4-methyl-5-vinylthiazole, vinyltrimethoxysilane, 1,3,5-triacryloyl hexahydro-1,3,5-triazine, diphenyl(4-vinylphenyl)phosphine oxide, and initiator thereto. Stir and react at 68 °C for 5.5 h in an inert gas atmosphere. After the reaction is completed, rotary evaporate to remove the solvent to obtain the modified filler; the mass ratio of the aluminum hydroxide flame retardant VK-LA50, nano-titanium dioxide, nano-boron fibers, organic solvent, 4-methyl-5-vinylthiazole, vinyltrimethoxysilane, 1,3,5-triacryloyl hexahydro-1,3,5-triazine, diphenyl(4-vinylphenyl)phosphine oxide, and initiator is 4.5:1:1.1:28:0.45:0.5:0.3:0.45:0.03; the particle size of the nano-titanium dioxide is 50 nm; the average diameter of the nano-boron fibers is 90 nm, and the aspect ratio is 33:1; the organic solvent is N,N-dimethylformamide; the initiator is azobisisobutyronitrile; the inert gas is argon.

[0049] The compatibilizer is maleic anhydride grafted polypropylene, selected from MAH-g-PP with the trade name EXXELOR PO1020 provided by Exxon in the United States; the antioxidant is a mixture of antioxidant 168, antioxidant 1010, and antioxidant 1076 in a mass ratio of 1:2:3; the lubricant is a mixture of ethylene bisstearamide and butyl stearate in a mass ratio of 3:5; the light stabilizer is a mixture of hindered amine light stabilizer HS-944 and ultraviolet absorber UV-531 in a mass ratio of 1:3.

[0050] A preparation method of the environmentally friendly high flame retardant cable material comprises the following steps: after mixing each raw material evenly by weight, a mixed material is obtained, then the mixed material is added into a twin-screw extruder for co-blending and extrusion, and then pelletized to obtain the environmentally friendly high flame retardant cable material; the extrusion temperature of the twin-screw extruder is 203 °C; the screw speed of the twin-screw extruder is 110 r / min.

[0051] Example 5

[0052] An environmentally friendly high flame retardant cable material is made from the following raw materials by weight: 100 parts of thermoplastic polyester elastomer, 15 parts of benzene ring-containing hyperbranched polyborosilazane, 10 parts of 3-trimethylolmethylamine-2-hydroxypropanesulfonic acid, 3 parts of phosphorus pentoxide, 0.8 part of polyphosphoric acid, 5 parts of melamine phosphate, 35 parts of modified filler, 5 parts of compatibilizer, 1.5 parts of antioxidant, 0.8 part of lubricant, 6 parts of plasticizer, 2 parts of light stabilizer.

[0053] The thermoplastic polyester elastomer is 3078; the benzene ring-containing hyperbranched polyborosilazane is made by the method of Example 1 of the Chinese invention patent with the application publication number CN109251038A.

[0054] The preparation method of the modified filler comprises the following steps: after mixing the aluminum hydroxide flame retardant VK-LA50, nano titanium dioxide, and nano boron fiber evenly, they are dispersed in an organic solvent, then 4-methyl-5-vinylthiazole, vinyltrimethoxysilane, 1,3,5-triacryloyl hexahydro-1,3,5-triazine, diphenyl(4-vinylphenyl)phosphine oxide, and initiator are added thereto, and stirred and reacted at 70 °C for 6 h in an inert gas atmosphere. After the reaction, the solvent is removed by rotary evaporation to obtain the modified filler; the mass ratio of the aluminum hydroxide flame retardant VK-LA50, nano titanium dioxide, nano boron fiber, organic solvent, 4-methyl-5-vinylthiazole, vinyltrimethoxysilane, 1,3,5-triacryloyl hexahydro-1,3,5-triazine, diphenyl(4-vinylphenyl)phosphine oxide, and initiator is 5:1:1.2:30:0.5:0.5:0.3:0.5:0.03; the particle size of the nano titanium dioxide is 60 nm; the average diameter of the nano boron fiber is 100 nm, and the aspect ratio is 35:1; the organic solvent is N,N-dimethylformamide; the initiator is azobisisobutyronitrile; the inert gas is nitrogen.

[0055] The compatibilizer is maleic anhydride grafted polypropylene, selected from MAH-g-PP with the trade name EXXELOR PO1020 provided by Exxon in the United States; the antioxidant is antioxidant 168; the lubricant is ethylene bisstearamide; the light stabilizer is hindered amine light stabilizer HS-944.

[0056] A preparation method of the environmentally friendly high flame-retardant cable material comprises the following steps: after mixing each raw material evenly by weight to obtain a mixed material, adding the mixed material into a twin-screw extruder for co-blending and extrusion, and then granulating to obtain the environmentally friendly high flame-retardant cable material; the extrusion temperature of the twin-screw extruder is 205 °C; the screw rotation speed of the twin-screw extruder is 120 r / min.

[0057] Comparative Example 1

[0058] An environmentally friendly high flame-retardant cable material and its preparation method are basically the same as those in Example 1, except that a thermoplastic polyester elastomer is used to replace the benzene ring-containing hyperbranched polyborosilazane.

[0059] Comparative Example 2

[0060] An environmentally friendly high flame-retardant cable material and its preparation method are basically the same as those in Example 1, except that 3-trimethylolmethylamine-2-hydroxypropane sulfonic acid and 4-methyl-5-vinylthiazole are not added.

[0061] In order to further illustrate the beneficial technical effects of the environmentally friendly high flame-retardant cable materials involved in each embodiment of the present invention, relevant performance tests are carried out on the environmentally friendly high flame-retardant cable materials involved in Examples 1-5 and Comparative Examples 1-2. The test results are shown in Table 1.

[0062] (1) Tensile strength: The tensile strength is tested according to the method of ASTM D412.

[0063] (2) Aging resistance: The test is carried out according to GB / T16422.2-2014 "Plastics - Methods of exposure to laboratory light sources - Part 2: Xenon-arc lamps". The cable material sample pieces are placed in a xenon-arc lamp aging test chamber to simulate the conditions of light, temperature, humidity, etc. in the natural environment. After 1000 h of aging, they are cooled to room temperature, and then the tensile strength is measured again according to the method in (1), and the tensile strength retention rate is statistically calculated. The larger the value, the better the aging resistance.

[0064] (3) Oxygen index test: The test is carried out with reference to GB / T 2406.2-2009.

[0065] Table 1 Test results of the performance of the environmentally friendly high flame-retardant cable material

[0066]

[0067] As can be seen from Table 1, the environmentally friendly high flame-retardant cable materials involved in the embodiments of the present invention have better mechanical and mechanical properties, flame-retardant properties and aging resistance than the products of the comparative examples. The combined use of benzene ring-containing hyperbranched polyborosilazane, 3-trimethylolmethylamine-2-hydroxypropane sulfonic acid and 4-methyl-5-vinylthiazole is beneficial to improving the above properties.

[0068] The above embodiments are only used to illustrate the technical concept and features of the present invention. The purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly, and it cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit and essence of the present invention should be covered within the protection scope of the present invention.

Claims

1. An environmentally friendly and highly flame-retardant cable compound, characterized in that, It is made from the following raw materials by weight: 100 parts of thermoplastic polyester elastomer, 10 - 15 parts of benzene ring-containing hyperbranched polyborosilazane, 8 - 10 parts of 3-trimethylolmethylamine-2-hydroxypropane sulfonic acid, 1 - 3 parts of phosphorus pentoxide, 0.5 - 0.8 parts of polyphosphoric acid, 3 - 5 parts of melamine phosphate, 25 - 35 parts of modified filler, 3 - 5 parts of compatibilizer, 0.8 - 1.5 parts of antioxidant, 0.5 - 0.8 parts of lubricant, 4 - 6 parts of plasticizer, 1 - 2 parts of light stabilizer.

2. The environmentally friendly high flame-retardant cable compound according to claim 1, wherein, The thermoplastic polyester elastomer is 3078.

3. The environmentally friendly high flame retardant cable material according to claim 1, wherein The preparation method of the modified filler includes the following steps: Mix aluminum hydroxide flame retardant VK-LA50, nano-titanium dioxide, and nano-boron fiber evenly, disperse them in an organic solvent, then add 4-methyl-5-vinylthiazole, vinyltrimethoxysilane, 1,3,5-triacryloyl hexahydro-1,3,5-triazine, diphenyl(4-vinylphenyl)phosphine oxide, and initiator thereto. Stir and react at 60 - 70 °C for 3 - 6 h under an inert gas atmosphere. After the reaction is completed, rotary evaporate to remove the solvent to obtain the modified filler.

4. The environmentally friendly high flame retardant cable material according to claim 3, characterized in that, The mass ratio of the aluminum hydroxide flame retardant VK-LA50, nano-titanium dioxide, nano-boron fiber, organic solvent, 4-methyl-5-vinylthiazole, vinyltrimethoxysilane, 1,3,5-triacryloyl hexahydro-1,3,5-triazine, diphenyl(4-vinylphenyl)phosphine oxide, and initiator is (3 - 5):1:(0.8 - 1.2):(20 - 30):(0.3 - 0.5):0.5:0.3:(0.3 - 0.5):0.

03.

5. The environmentally friendly high flame retardant cable material according to claim 3, characterized in that, The particle size of the nano-titanium dioxide is 20 - 60 nm; the average diameter of the nano-boron fiber is 10 - 100 nm, and the aspect ratio is (25 - 35):

1.

6. The environmentally friendly high flame retardant cable compound according to claim 3, wherein The organic solvent is N,N-dimethylformamide; the initiator is azobisisobutyronitrile; the inert gas is any one of nitrogen, helium, neon, and argon.

7. The environmentally friendly high flame-retardant cable compound according to claim 1, characterized in that The compatibilizer is maleic anhydride grafted polypropylene, and it is MAH-g-PP with the trade name EXXELOR PO1020 provided by Exxon in the United States; the antioxidant is at least one of antioxidant 168, antioxidant 1010, and antioxidant 1076.

8. The environmentally friendly high flame retardant cable material according to claim 1, characterized in that, The lubricant is at least one of ethylene bisstearamide and butyl stearate; the light stabilizer is at least one of hindered amine light stabilizer HS-944 and ultraviolet absorber UV-531.

9. A preparation method of the environmentally friendly high flame retardant cable material according to any one of claims 1-8, characterized in that, It includes the following steps: Mix the raw materials evenly by weight to obtain a mixed material, then add the mixed material into a twin-screw extruder for co-blending and extrusion, and then granulate to obtain an environmentally friendly high-flame-retardant cable material.

10. The preparation method of the environmentally friendly high flame retardant cable material according to claim 9, characterized in that, The extrusion temperature of the twin-screw extruder is 190 - 205 °C; the screw speed of the twin-screw extruder is 60 - 120 r / min.

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