Tracking-resistant flame-retardant polyphenyl ether composition as well as preparation method and application thereof

Abstract

The invention relates to a tracking-resistant and flame-retardant polyphenyl ether composition as well as a preparation method and application thereof. The tracking-resistant and flame-retardant polyphenyl ether composition is prepared from the following raw materials: polyphenyl ether, polystyrene resin, a flame retardant, a flexibilizer and a filler, the filler is a mixture of aluminum hydroxide and silicon dioxide. According to the tracking-resistant flame-retardant polyphenyl ether composition disclosed by the invention, the filler is specifically selected and then is compounded with the flame retardant, so that the obtained flame-retardant polyphenyl ether material has excellent flame retardance and high tracking resistance on the basis of ensuring relatively good notch impact strength.

Description

Technical Field

[0001] The invention relates to the technical field of flame-retardant engineering plastics, and in particular to a tracking-resistant flame-retardant polyphenylene ether composition and a preparation method and application thereof. Background Art

[0002] At present, the electronic and electrical industry is developing rapidly, and the demand for flame-retardant engineering plastics with high electrical insulation performance is increasing in automotive appliances, household appliances, and automotive appliances. Polyphenylene Oxide (PPO) can be flame-retardant without using harmful halogen compounds or antimony compounds, and has very low dielectric loss tangent and dielectric constant, so it is widely used in various electrical and electronic parts. However, with the development of science and technology, electronic and electrical products are becoming more and more multifunctional and high-performance, and the market requirements for tracking resistance and other properties are becoming more and more stringent. Polyphenylene ether is not enough to meet the needs of practical applications in terms of tracking resistance.

[0003] Patent CN116535839A discloses a resin composition and its products, the resin composition includes a polyphenylene ether resin with a specific structure and an additive, the additive may include a maleimide resin, a cross-linking agent containing unsaturated carbon-carbon double bonds, a polyolefin, a flame retardant, a filler, a hardening accelerator or a combination thereof. The product made by the resin composition can be improved in one or more aspects such as relative tracking index, breakdown voltage, dielectric loss and copper foil tension, but its technical effect in terms of tracking resistance is still not good. Patent CN114231015A discloses a PPE alloy material with high flame retardancy for arc resistance and a preparation method thereof, the raw materials of the PPE alloy material with high flame retardancy for arc resistance are polyphenylene ether, polystyrene, a toughening agent, a composite antioxidant, a lubricant, a phosphorus flame retardant, a nitrogen flame retardant, titanium dioxide, an insulating agent, a compatibilizer, barium sulfate, polytetrafluoroethylene and a UV absorber. Although the arc-resistant and highly flame-retardant PPE alloy material has long aging resistance, tracking resistance, arc resistance and high flame-retardant properties, its raw material composition is complex.

[0004] In summary, in order to expand the application of polyphenylene ether materials in the electronic and electrical fields, it is of great significance to provide a polyphenylene ether resin that has both excellent flame retardant properties and high resistance to leakage tracking. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a tracking resistant flame retardant polyphenylene ether composition and a preparation method and application thereof. The tracking resistant flame retardant polyphenylene ether composition is compounded with a flame retardant and a filler so that the obtained flame retardant polyphenylene ether material has excellent flame retardant properties and high tracking resistance while ensuring good notch impact strength.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] In a first aspect, the present invention provides a tracking resistant flame retardant polyphenylene ether composition, wherein the raw materials for preparing the tracking resistant flame retardant polyphenylene ether composition include polyphenylene ether, polystyrene resin, flame retardant, toughening agent and filler;

[0008] The filler is a mixture of aluminum hydroxide and silicon dioxide.

[0009] In the present invention, by compounding a specific flame retardant and a filler, the flame retardant polyphenylene ether material obtained has excellent flame retardant properties and high resistance to leakage current tracking performance while ensuring good notched impact strength. Further, the specific filler of the present invention is a mixture of aluminum hydroxide and silicon dioxide. Through the specific combination of aluminum hydroxide and silicon dioxide, a synergistic effect can be exerted, so that the thermal conductivity of the filler is better, and the high temperature energy generated by the discharge is quickly driven away, thereby effectively inhibiting the decomposition of the insulating material and the generation of carbon marks, thereby significantly improving the resistance to leakage current tracking of the polyphenylene ether material.

[0010] Preferably, the raw materials for preparing the tracking resistant flame retardant polyphenylene ether composition include the following components in parts by weight:

[0011]

[0012]

[0013] The raw materials for preparing the tracking resistant flame retardant polyphenylene ether composition of the present invention include 50-65 parts by weight of polyphenylene ether, for example, 52 parts by weight, 54 parts by weight, 56 parts by weight, 58 parts by weight, 60 parts by weight, 62 parts by weight or 64 parts by weight.

[0014] The polystyrene resin is 10-15 parts by weight, for example, 11 parts by weight, 11.5 parts by weight, 12 parts by weight, 12.5 parts by weight, 13 parts by weight, 13.5 parts by weight, 14 parts by weight or 14.5 parts by weight.

[0015] The flame retardant may be 5-10 parts by weight, for example, 5.5 parts by weight, 6 parts by weight, 6.5 parts by weight, 7 parts by weight, 7.5 parts by weight, 8 parts by weight, 8.5 parts by weight, 9 parts by weight or 9.5 parts by weight.

[0016] The toughening agent is 8-12 parts by weight, for example, 8.5 parts by weight, 9 parts by weight, 9.5 parts by weight, 10 parts by weight, 10.5 parts by weight, 11 parts by weight, 11.5 parts by weight or 12 parts by weight.

[0017] The filler may be 10-20 parts by weight, for example, 11 parts by weight, 12 parts by weight, 13 parts by weight, 14 parts by weight, 15 parts by weight, 16 parts by weight, 17 parts by weight, 18 parts by weight or 19 parts by weight.

[0018] Preferably, the polyphenylene ether comprises 2,6-dimethyl-1,4-phenyl ether units and / or 2,3,6-trimethyl-1,4-phenyl ether units.

[0019] Preferably, the weight average molecular weight of the polystyrene resin is 30,000 to 100,000 atomic mass units, and the polystyrene resin may be atactic, isotactic or syntactic.

[0020] Preferably, the flame retardant includes a phosphate flame retardant.

[0021] Preferably, the phosphate flame retardant includes an aromatic condensed phosphate flame retardant and / or a metal phosphate.

[0022] Preferably, the aromatic condensed phosphate flame retardant includes any one of bisphenol A bis(diphenyl phosphate) (BDP), resorcinol bis(diphenyl phosphate) or triphenyl phosphate, or a combination of at least two thereof.

[0023] In the present invention, the aromatic condensed phosphate flame retardant has good thermal stability and flame retardant properties, and can be melt-blended with polyphenylene ether to prepare a polyphenylene ether material with stable and excellent flame retardant properties. Compounding it with a specific filler can play a synergistic role, thereby further improving the flame retardancy and anti-tracking properties of the obtained polyphenylene ether material.

[0024] Preferably, the metal phosphate includes any one of calcium phosphate, sodium phosphate, potassium phosphate, aluminum phosphate, magnesium phosphate or zinc phosphate, or a combination of at least two thereof.

[0025] Preferably, the toughening agent includes any one of SEBS, SBS or SEEPS, or a combination of at least two of them.

[0026] Preferably, the mass ratio of the filler to the flame retardant is 1:(0.4-1), for example, it can be 1:0.4, 1:0.5, 1:0.6, 1:0.7, 1:0.8, 1:0.9 or 1:1, etc.

[0027] Preferably, the mass of the filler is 15-26% of the mass of the polyphenylene ether, for example, it can be 16%, 17%, 18%, 19%, 20%, 21%, 22%, 23%, 24% or 25%.

[0028] In the present invention, the amount of filler added is specifically selected. When its mass exceeds 26% of the mass of polyphenylene ether, the notched impact strength of the obtained polyphenylene ether material will be significantly reduced, thereby affecting the use range of the material; when its content is lower than 15% of the mass of polyphenylene ether, due to the low content of the specific filler, the improvement effect on the anti-tracking performance of the obtained polyphenylene ether material is not good, and the flame retardant performance of the obtained polyphenylene ether material is also poor.

[0029] Preferably, the content of aluminum hydroxide is 3-10 parts by weight, for example, it can be 3.5 parts by weight, 4 parts by weight, 4.5 parts by weight, 5 parts by weight, 5.5 parts by weight, 6 parts by weight, 7 parts by weight, 8 parts by weight, 9 parts by weight or 9.5 parts by weight, etc.

[0030] Preferably, the content of silicon dioxide is 3-10 parts by weight, for example, it can be 3.5 parts by weight, 4 parts by weight, 4.5 parts by weight, 5 parts by weight, 5.5 parts by weight, 6 parts by weight, 7 parts by weight, 8 parts by weight, 9 parts by weight or 9.5 parts by weight, etc.

[0031] Preferably, the mass ratio of the aluminum hydroxide to the silicon dioxide is (0.53-1.86):1, for example, it can be 0.6:1, 0.7:1, 0.8:1, 0.9:1, 1:1, 1.1:1, 1.2:1, 1.3:1, 1.4:1, 1.5:1, 1.6:1 or 1.7:1, etc.

[0032] In the present invention, the filler is a mixture of aluminum hydroxide and silicon dioxide. When the mass ratio of the two is (0.53-1.86):1, the tracking resistance of the obtained polyphenylene ether material can be well improved. When the mass ratio of the two is 1:1, the thermal conductivity synergy of the filler can be best exerted, and the high-temperature energy generated by discharge can be quickly driven away, thereby effectively inhibiting the decomposition of the insulating material and the generation of carbon marks, thereby significantly improving the tracking resistance of the polyphenylene ether material, so that it can better meet the actual production needs.

[0033] In a second aspect, the present invention provides a method for preparing the tracking resistant flame retardant polyphenylene ether composition as described in the first aspect, the preparation method comprising:

[0034] The polyphenylene ether, polystyrene resin and filler are mixed, a flame retardant is added, and melt co-extrusion is performed to obtain the tracking resistant flame retardant polyphenylene ether composition.

[0035] Preferably, the mixing time is 10-20 min, for example, it can be 11 min, 12 min, 13 min, 14 min, 15 min, 16 min, 17 min, 18 min or 19 min, etc.

[0036] Preferably, the flame retardant is added by side feeding, and in the present invention, a liquid adding pump is used to add the flame retardant.

[0037] Preferably, the melt coextrusion is performed by a twin-screw extruder.

[0038] Preferably, the rotation speed of the twin-screw extruder is 450-550 r / min, for example, it can be 460 r / min, 470 r / min, 480 r / min, 490 r / min, 500 r / min, 510 r / min, 520 r / min, 530 r / min or 540 r / min, etc.

[0039] Preferably, the temperature of the twin-screw extruder includes:

[0040] The temperature of zone 1 is 195-205°C (for example, 196°C, 197°C, 198°C, 199°C, 200°C, 201°C, 202°C, 203°C or 204°C), the temperature of zone 2 is 245-255°C (for example, 246°C, 247°C, 248°C, 249°C, 250°C, 251°C, 252°C, 253°C or 254°C), and the temperature of zone 3 is 275-285°C (for example, 276°C, 277°C, 278°C , 279°C, 280°C, 281°C, 282°C, 283°C or 284°C, etc.), the temperature of zone four is 270-280°C (for example, it can be 271°C, 272°C, 273°C, 274°C, 275°C, 276°C, 277°C, 278°C or 279°C, etc.), the temperature of zone five is 270-280°C (for example, it can be 271°C, 272°C, 273°C, 274°C, 275°C, 276°C, 277°C, 278°C or 279°C, etc.), The temperature of zone 6 is 270-280°C (for example, it can be 271°C, 272°C, 273°C, 274°C, 275°C, 276°C, 277°C, 278°C or 279°C, etc.), the temperature of zone 7 is 265-275°C (for example, it can be 266°C, 267°C, 268°C, 269°C, 270°C, 271°C, 272°C, 273°C or 274°C, etc.), and the temperature of zone 8 is 265-275°C (for example, it can be 266°C, 267°C, 268°C, 269°C, 270°C, 271°C, 272°C, 273°C or 274°C, etc.). , 269℃, 270℃, 271℃, 272℃, 273℃ or 274℃, etc.), the temperature of zone nine is 265-275℃ (for example, it can be 266℃, 267℃, 268℃, 269℃, 270℃, 271℃, 272℃, 273℃ or 274℃, etc.), the temperature of zone ten is 265-275℃ (for example, it can be 266℃, 267℃, 268℃, 269℃, 270℃, 271℃, 272℃, 273℃ or 274℃, etc.).

[0041] In a third aspect, the present invention provides a tracking resistant flame retardant polyphenylene ether material, wherein the tracking resistant flame retardant polyphenylene ether material comprises the tracking resistant flame retardant polyphenylene ether composition described in the first aspect.

[0042] In a fourth aspect, the present invention provides a use of the tracking resistant flame retardant polyphenylene ether material as described in the third aspect in electronic and electrical products.

[0043] Compared with the prior art, the present invention has at least the following beneficial effects:

[0044] (1) The flame-retardant polyphenylene ether composition resistant to tracking provided by the present invention is compounded with a specific flame retardant and a filler, so that the flame-retardant polyphenylene ether material obtained can have excellent flame retardancy and high resistance to tracking while ensuring good notched impact strength.

[0045] (2) The filler in the anti-tracking flame-retardant polyphenylene ether composition provided by the present invention is a mixture of aluminum hydroxide and silicon dioxide. The specific combination of aluminum hydroxide and silicon dioxide can play a synergistic role, so that the thermal conductivity of the filler is better, and the high-temperature energy generated by discharge is quickly driven away, thereby effectively inhibiting the decomposition of the insulating material and the generation of carbon marks, thereby significantly improving the anti-tracking performance of the polyphenylene ether material. DETAILED DESCRIPTION

[0046] For the convenience of understanding the present invention, the present invention lists the following embodiments. It should be understood by those skilled in the art that the embodiments are only to help understand the present invention and should not be regarded as specific limitations of the present invention.

[0047] Some of the raw material information involved in the following examples and comparative examples are as follows:

[0048] Polyphenylene ether (PPO): purchased from Nantong Xingchen Company, brand name LXN040;

[0049] Polystyrene resin (PS): purchased from Chi Mei Company, Taiwan, China, with the brand name PS PG-383M;

[0050] Aromatic condensed phosphate flame retardant FR: purchased from Japan Daihachi Chemical Industry Co., Ltd., brand CR-741;

[0051] Toughening agent SEBS: purchased from Kraton Corporation, brand name Kraton G1651.

[0052] The reagents or raw materials not specially specified in the examples and comparative examples of the present invention are all commercially available.

[0053] Example 1

[0054] This embodiment provides a tracking resistant flame retardant polyphenylene ether composition, the raw materials for preparing the composition include the following components in parts by weight:

[0055]

[0056] The preparation method of the anti-tracking flame-retardant polyphenylene ether composition is as follows:

[0057] According to the above weight proportions, polyphenylene ether, polystyrene resin, toughening agent, aluminum hydroxide and silicon dioxide are added to a high-speed mixer and mixed for 15 minutes. The mixed raw materials are added to a twin-screw extruder for melt co-extrusion. The extruder temperature is: 200°C for zone 1, 250°C for zone 2, 280°C for zone 3, 275°C for zone 4, 275°C for zone 5, 275°C for zone 6, 270°C for zone 7, 270°C for zone 8, 270°C for zone 9, 270°C for zone 10, the extruder screw speed is 500r / min, and the residence time is 3min. The flame retardant is added by a liquid adding pump. After screw extrusion, the mixture is cooled, blown dry and pelletized to obtain the stable performance of the anti-tracking flame-retardant polyphenylene ether composition.

[0058] Example 2

[0059] This embodiment provides a tracking resistant flame retardant polyphenylene ether composition, the raw materials for preparing the composition include the following components in parts by weight:

[0060]

[0061] The preparation method of the anti-tracking flame-retardant polyphenylene ether composition is as follows:

[0062] According to the above weight proportions, polyphenylene ether, polystyrene resin, toughening agent, aluminum hydroxide and silicon dioxide are added to a high-speed mixer and mixed for 10 minutes. The mixed raw materials are added to a twin-screw extruder for melt co-extrusion. The extruder temperature is: the temperature of zone 1 is 195°C, the temperature of zone 2 is 245°C, the temperature of zone 3 is 275°C, the temperature of zone 4 is 270°C, the temperature of zone 5 is 270°C, the temperature of zone 6 is 270°C, the temperature of zone 7 is 265°C, the temperature of zone 8 is 265°C, the temperature of zone 9 is 265°C, the temperature of zone 10 is 265°C, the screw speed of the extruder is 450r / min, and the residence time is 3min. The flame retardant is added by a liquid adding pump. After screw extrusion, the mixture is cooled, blown dry and pelletized to obtain the stable performance of the anti-tracking flame-retardant polyphenylene ether composition.

[0063] Example 3

[0064] This embodiment provides a tracking resistant flame retardant polyphenylene ether composition, the raw materials for preparing the composition include the following components in parts by weight:

[0065]

[0066] The preparation method of the anti-tracking flame-retardant polyphenylene ether composition is as follows:

[0067] According to the above weight proportions, polyphenylene ether, polystyrene resin, toughening agent, aluminum hydroxide and silicon dioxide are added to a high-speed mixer and mixed for 20 minutes. The mixed raw materials are added to a twin-screw extruder for melt co-extrusion. The extruder temperature is: the temperature of zone 1 is 205°C, the temperature of zone 2 is 255°C, the temperature of zone 3 is 285°C, the temperature of zone 4 is 280°C, the temperature of zone 5 is 280°C, the temperature of zone 6 is 280°C, the temperature of zone 7 is 275°C, the temperature of zone 8 is 275°C, the temperature of zone 9 is 275°C, the temperature of zone 10 is 275°C, the screw speed of the extruder is 550r / min, and the residence time is 3min. The flame retardant is added by a liquid adding pump. After screw extrusion, the mixture is cooled, blown dry and pelletized to obtain the stable performance of the anti-tracking flame-retardant polyphenylene ether composition.

[0068] Example 4

[0069] This embodiment provides a tracking resistant flame retardant polyphenylene ether composition, which differs from Example 1 in that aluminum hydroxide is adjusted from 5 parts by weight to 7.5 parts by weight, and silicon dioxide is adjusted from 5 parts by weight to 7.5 parts by weight, and other components, contents and preparation methods are the same as those in Example 1.

[0070] Example 5

[0071] This embodiment provides a tracking resistant flame retardant polyphenylene ether composition, which differs from Example 1 in that the aluminum hydroxide is adjusted from 5 parts by weight to 10 parts by weight, and the silicon dioxide is adjusted from 5 parts by weight to 10 parts by weight, and the other components, contents and preparation methods are the same as those in Example 1.

[0072] Example 6

[0073] This embodiment provides a tracking resistant flame retardant polyphenylene ether composition, which differs from Example 1 in that aluminum hydroxide is adjusted from 5 parts by weight to 7 parts by weight, and silicon dioxide is adjusted from 5 parts by weight to 3 parts by weight, and other components, contents and preparation methods are the same as those in Example 1.

[0074] Example 7

[0075] This embodiment provides a tracking resistant flame retardant polyphenylene ether composition, which differs from Example 1 in that aluminum hydroxide is adjusted from 5 parts by weight to 3 parts by weight, and silicon dioxide is adjusted from 5 parts by weight to 7 parts by weight, and other components, contents and preparation methods are the same as those in Example 1.

[0076] Example 8

[0077] This embodiment provides a tracking resistant flame retardant polyphenylene ether composition, which differs from Example 1 in that aluminum hydroxide is adjusted from 5 parts by weight to 6.5 parts by weight, and silicon dioxide is adjusted from 5 parts by weight to 3.5 parts by weight, and other components, contents and preparation methods are the same as those in Example 1.

[0078] Example 9

[0079] This embodiment provides a tracking resistant flame retardant polyphenylene ether composition, which differs from Example 1 in that aluminum hydroxide is adjusted from 5 parts by weight to 3.5 parts by weight, and silicon dioxide is adjusted from 5 parts by weight to 6.5 parts by weight, and other components, contents and preparation methods are the same as those in Example 1.

[0080] Example 10

[0081] This embodiment provides a tracking resistant flame retardant polyphenylene ether composition, which differs from Example 1 in that the aluminum hydroxide is adjusted from 5 parts by weight to 8.45 parts by weight, and the silicon dioxide is adjusted from 5 parts by weight to 8.45 parts by weight, and the other components, contents and preparation methods are the same as those in Example 1.

[0082] Embodiment 11

[0083] This embodiment provides a tracking resistant flame retardant polyphenylene ether composition, which differs from Example 1 in that aluminum hydroxide is adjusted from 5 parts by weight to 4 parts by weight, and silicon dioxide is adjusted from 5 parts by weight to 4 parts by weight, and other components, contents and preparation methods are the same as those in Example 1.

[0084] Example 12

[0085] This embodiment provides a tracking-resistant flame-retardant polyphenylene ether composition, which differs from Example 1 only in that the aromatic condensed phosphate flame retardant FR is replaced by tri(isodecyl)phosphite; the other components, contents and preparation methods are the same as those in Example 1.

[0086] Comparative Example 1

[0087] This comparative example provides a polyphenylene ether composition, which differs from Example 1 in that aluminum hydroxide is not added, the amount of silicon dioxide is adjusted from 5 parts by weight to 10 parts by weight, and the other components, contents and preparation methods are the same as those in Example 1.

[0088] Comparative Example 2

[0089] This comparative example provides a polyphenylene ether composition, which differs from Example 1 in that silicon dioxide is not added, the aluminum hydroxide is adjusted from 5 parts by weight to 10 parts by weight, and the other components, contents and preparation methods are the same as those in Example 1.

[0090] Comparative Example 3

[0091] This comparative example provides a polyphenylene ether composition, which differs from Example 1 only in that aluminum hydroxide is replaced by an equal weight portion of magnesium hydroxide, and other components, contents and preparation methods are the same as those in Example 1.

[0092] Comparative Example 4

[0093] This comparative example provides a polyphenylene ether composition, which differs from Example 1 in that no aromatic condensed phosphate flame retardant is added, and the reduced components are proportionally distributed to aluminum hydroxide and silicon dioxide, and other components, contents and preparation methods are the same as those in Example 1.

[0094] Comparative Example 5

[0095] This comparative example provides a polyphenylene ether composition, which differs from Example 1 in that aluminum hydroxide and silicon dioxide are not added, the aromatic condensed phosphate flame retardant is adjusted from 8 parts by weight to 18 parts by weight, and other components, contents and preparation methods are the same as those in Example 1.

[0096] Application Example 1

[0097] The tracking resistant flame retardant polyphenylene ether composition (Example 1), auxiliary agent (antioxidant 1010), carbon black and composite dye (titanium dioxide) were added to a high-speed mixer in a mass ratio of 97:1.8:0.8:0.4 and mixed evenly for 15 minutes. The mixed materials were added to a twin-screw extruder for melt co-extrusion. The extruder temperature, extruder screw speed and residence time were set the same as the relevant parameter settings of the melt co-extrusion process in Example 1. After screw extrusion, cooling, drying and pelletizing were performed. The extruder temperature and masterbatch parameters were the same, and finally a tracking resistant flame retardant polyphenylene ether material with stable performance was obtained.

[0098] Application Example 2

[0099] The tracking resistant flame retardant polyphenylene ether composition (Example 2), auxiliary agent (light stabilizer JF-90), carbon black and composite dye (titanium dioxide) were added to a high-speed mixer in a mass ratio of 97.6:1.5:0.6:0.3 and mixed evenly for 10 minutes. The mixed materials were added to a twin-screw extruder for melt co-extrusion. The extruder temperature, extruder screw speed and residence time were set the same as the relevant parameter settings of the melt co-extrusion process in Example 2. After screw extrusion, cooling, drying and pelletizing were performed. The extruder temperature and masterbatch parameters were the same, and finally a tracking resistant flame retardant polyphenylene ether material with stable performance was obtained.

[0100] Application Example 3

[0101] The tracking resistant flame retardant polyphenylene ether composition (Example 3), auxiliary agent (heat stabilizer zinc oxide), carbon black and composite dye (titanium dioxide) were added to a high-speed mixer in a mass ratio of 97:2:0.5:0.5 and mixed evenly for 10 minutes. The mixed materials were added to a twin-screw extruder for melt co-extrusion. The extruder temperature, extruder screw speed and residence time were set the same as the relevant parameter settings of the melt co-extrusion process in Example 2. After screw extrusion, cooling, drying and pelletizing were performed. The extruder temperature and masterbatch parameters were the same, and finally a tracking resistant flame retardant polyphenylene ether material with stable performance was obtained.

[0102] Application Example 4-12

[0103] The tracking resistant flame retardant polyphenylene ether composition (Example 1) in Application Example 1 was replaced by the tracking resistant flame retardant polyphenylene ether compositions (Examples 4-12), respectively. Other components, contents and preparation methods were the same as those in Application Example 1.

[0104] Comparative Application Examples 1-5

[0105] The tracking resistant flame retardant polyphenylene ether composition (Example 1) in Application Example 1 was replaced by polyphenylene ether compositions (Comparative Examples 1-5) respectively, and other components, contents and preparation methods were the same as those in Application Example 1.

[0106] The polyphenylene ether compositions obtained in Application Examples 1-12 and Comparative Application Examples 1-5 were subjected to performance tests, and the test methods / standards are as follows:

[0107] (1) Tensile strength test: ISO 527-2;

[0108] (2) Notched impact strength test: ISO 179;

[0109] (3) Flame retardancy test: UL94;

[0110] (4) Tracking test: ASTM D3638.

[0111] The test results are shown in Table 1.

[0112] Table 1

[0113]

[0114]

[0115] The test results show that:

[0116] (1) It can be seen from Application Examples 1 to 11 that the flame retardant polyphenylene ether material obtained by compounding a specific flame retardant and a filler has excellent flame retardant resistance and high tracking resistance on the basis of ensuring good notched impact strength. The flame retardant polyphenylene ether material has a tensile strength of 51-72 MPa and a notched impact strength of 11.4-21 KJ / m 2 , flame retardancy can reach V-0, and tracking resistance is 425-600V.

[0117] (2) It can be seen from Application Examples 1, 4, 5, 10 and 11 that the present invention further limits the mass of the filler to 15-26% of the mass of the polyphenylene ether, so that the obtained polyphenylene ether material can have good notched impact strength and resistance to leakage current tracking while ensuring flame retardancy. When the mass of the filler exceeds 26% of the mass of the polyphenylene ether, its notched impact strength will decrease significantly, thereby affecting the application range of the material; but when the mass of the filler is less than 15% of the mass of the polyphenylene ether, its resistance to leakage current tracking is significantly reduced.

[0118] (3) It can be seen from Application Examples 1 and 6-9 that when the filler content is constant, a better technical effect is achieved when the mass ratio of aluminum hydroxide to silicon dioxide is (0.53-1.86):1. Furthermore, when the mass ratio of the two is 1:1, the thermal conductivity synergistic effect of the filler is best exerted, which quickly drives away the high-temperature energy generated by discharge, effectively inhibits the decomposition of the insulating material and the generation of carbon marks, thereby significantly improving the anti-leakage tracking performance of the polyphenylene ether material, which can reach 600V.

[0119] (4) By comparing Application Example 1 with Comparative Application Examples 1 and 2, it can be seen that the compounding of aluminum hydroxide and silicon dioxide in the filler of the present invention can exert a synergistic effect, so that the obtained polyphenylene ether material has good anti-tracking performance while ensuring good impact resistance and flame retardancy. However, single aluminum hydroxide or silicon dioxide destroys the specific synergistic effect of the two, which not only significantly reduces the impact resistance and flame retardancy of the polyphenylene ether material, but also fails to improve the anti-tracking performance of the polyphenylene ether material.

[0120] (5) It can be seen from the comparison between Application Example 1 and Comparative Application Example 3 that the selection of fillers not specified in the present invention cannot bring into play the synergistic effect between the specific fillers of the present invention, thereby failing to significantly improve the tracking resistance of the polyphenylene ether material, and further failing to solve the technical problem that the polyphenylene ether resin cannot balance good flame retardancy and tracking resistance, and failing to meet the current market demand for polyphenylene ether materials.

[0121] (6) By comparing Application Example 1 with Comparative Application Examples 4 and 5, it can be seen that Comparative Example 4 does not add a specific aromatic condensed phosphate flame retardant, and its resistance to leakage current tracking performance is significantly reduced. Comparative Example 5 does not add specific fillers (aluminum hydroxide and silica), and its flame retardancy and resistance to leakage current tracking performance are significantly reduced. This shows that the present invention can play a synergistic role through the compounding of specific fillers and flame retardants, so that the obtained polyphenylene ether material has good flame retardancy and resistance to leakage current tracking performance.

[0122] In summary, the present invention, through the compounding of specific flame retardants and fillers, enables the obtained flame retardant polyphenylene ether material to have excellent flame retardant resistance and high tracking resistance on the basis of ensuring good notched impact strength.

[0123] The applicant declares that the above is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention shall fall within the protection scope and disclosure scope of the present invention.

Claims

1. A flame-retardant polyphenylene ether composition resistant to tracking, characterized in that: The raw materials for preparing the anti-tracking flame-retardant polyphenylene ether composition include polyphenylene ether, polystyrene resin, flame retardant, toughening agent and filler; The filler is a mixture of aluminum hydroxide and silicon dioxide.

2. The tracking resistant flame retardant polyphenylene ether composition according to claim 1, characterized in that: The raw materials for preparing the anti-tracking flame-retardant polyphenylene ether composition include the following components in parts by weight:

3. The anti-tracking flame-retardant polyphenylene ether composition according to claim 1 or 2, characterized in that: The polyphenylene ether includes 2,6-dimethyl-1,4-phenyl ether units and / or 2,3,6-trimethyl-1,4-phenyl ether units.

4. The anti-tracking flame-retardant polyphenylene ether composition according to any one of claims 1 to 3, characterized in that: The weight average molecular weight of the polystyrene resin is 30,000 to 100,000 atomic mass units.

5. The anti-tracking flame-retardant polyphenylene ether composition according to any one of claims 1 to 4, characterized in that: The flame retardant includes a phosphate flame retardant; Preferably, the phosphate flame retardant includes an aromatic condensed phosphate flame retardant and / or a metal phosphate; Preferably, the aromatic condensed phosphate flame retardant includes any one of bisphenol A bis(diphenyl phosphate), resorcinol bis(diphenyl phosphate) or triphenyl phosphate, or a combination of at least two thereof.

6. The anti-tracking flame-retardant polyphenylene ether composition according to any one of claims 1 to 5, characterized in that: The toughening agent includes any one of SEBS, SBS or SEEPS or a combination of at least two thereof.

7. The anti-tracking flame-retardant polyphenylene ether composition according to any one of claims 1 to 6, characterized in that: The mass ratio of the filler to the flame retardant is 1:(0.4-1); Preferably, the mass of the filler is 15-26% of the mass of the polyphenylene ether; Preferably, the content of the aluminum hydroxide is 3-10 parts by weight; Preferably, the content of silicon dioxide is 3-10 parts by weight; Preferably, the mass ratio of aluminum hydroxide to silicon dioxide is (0.53-1.86):

1.

8. A method for preparing the tracking resistant flame retardant polyphenylene ether composition according to any one of claims 1 to 7, characterized in that: The preparation method comprises: The polyphenylene ether, polystyrene resin, toughening agent and filler are mixed, a flame retardant is added, and melt co-extrusion is performed to obtain the tracking resistant flame retardant polyphenylene ether composition; Preferably, the mixing time is 10-20 min; Preferably, the flame retardant is added by side feeding; Preferably, the melt coextrusion is carried out by a twin-screw extruder; Preferably, the speed of the twin-screw extruder is 450-550r / min; Preferably, the temperature of the twin-screw extruder includes: The temperature of zone one is 195-205℃, the temperature of zone two is 245-255℃, the temperature of zone three is 275-285℃, the temperature of zone four is 270-280℃, the temperature of zone five is 270-280℃, the temperature of zone six is ​​270-280℃, the temperature of zone seven is 265-275℃, the temperature of zone eight is 265-275℃, the temperature of zone nine is 265-275℃, and the temperature of zone ten is 265-275℃.

9. A tracking resistant flame retardant polyphenylene ether material, characterized in that: The tracking resistant flame retardant polyphenylene ether material comprises the tracking resistant flame retardant polyphenylene ether composition according to any one of claims 1 to 7.

10. Use of the tracking resistant flame retardant polyphenylene ether material as claimed in claim 9 in electronic and electrical products.

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