Flame retardant nylon material

Abstract

The embodiment of the present invention discloses a flame retardant nylon material, which includes a flame retardant composition, a polyamide resin and a toughening agent composition; wherein the toughening agent composition includes grafted SEBS and ungrafted SEBS. The flame retardant nylon material provided by the present application is compounded with a flame retardant composition, a polyamide resin and a toughening agent composition, which can effectively improve the flame retardant properties of the nylon material. The styrene content and block structure of the grafted SEBS and the ungrafted SEBS in the toughening agent composition can improve the mechanical properties and processing properties of the flame retardant nylon material. The grafted and ungrafted SEBS blending system has the function of regulating the fluidity of the material, is suitable for processing samples of different shapes, and does not affect the color of the nylon material itself.

Description

Technical Field

[0001] The invention relates to the technical field of plastic materials, in particular to a flame retardant nylon material. Background Art

[0002] Glass fiber reinforced nylon composites have excellent mechanical properties, but they do not have flame retardant properties. The flame retardant modification of glass fiber reinforced nylon composites is a topic of focus and development in academia and industry today. At present, the most widely used halogen-free flame retardants are red phosphorus and melamine salts. Among them, red phosphorus has high flame retardant efficiency, but it cannot be matched into light colors, and the product color matching is very limited. Melamine salts belong to nitrogen-based flame retardants, mainly including melamine urate and melamine polyphosphate. They have high flame retardant efficiency, but nylon modified with melamine urate produces dripping during combustion and even the drippings continue to burn. The use of melamine phosphate modification will cause a significant decrease in the impact properties of nylon, and melamine phosphate will easily precipitate under high temperature and high humidity conditions.

[0003] Therefore, there is an urgent need in the art to develop a glass fiber reinforced nylon composite material with good flame retardancy and mechanical properties. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a flame retardant nylon material to solve the problem that the mechanical properties of the nylon material are reduced when the melamine phosphate is used to modify the nylon material to improve its flame retardant properties.

[0005] Specifically, the present invention provides a flame retardant nylon material, which includes a flame retardant composition, a polyamide resin and a toughening agent composition; wherein the toughening agent composition includes grafted SEBS and ungrafted SEBS.

[0006] The flame-retardant nylon material provided in the present application is compounded with a flame retardant composition, a polyamide resin and a toughening agent composition, which can effectively improve the flame retardant properties of the nylon material. At the same time, the styrene content\block structure of the grafted SEBS and the ungrafted SEBS in the toughening agent composition can improve the mechanical properties and processing properties of the flame-retardant nylon material. The grafted and ungrafted SEBS blending system has the function of regulating the fluidity of the material, is suitable for processing samples of different shapes, and does not affect the color of the nylon material itself.

[0007] In some embodiments of the flame-retardant nylon material, the weighted average value of the styrene content in the grafted SEBS is 13% to 30%, and the mass proportion of the grafted SEBS in the flame-retardant nylon material is 1% to 10%;

[0008] The weight average value of the styrene content in the ungrafted SEBS is 13-33%, and the mass proportion of the ungrafted SEBS in the flame-retardant nylon material is 2%-12%.

[0009] The grafted SEBS with a mass proportion of 1% to 10% and the ungrafted SEBS with a mass proportion of 2% to 12% are compounded, the weighted average value of the styrene content in the grafted SEBS is 13% to 30%, and the weighted average value of the styrene content in the ungrafted SEBS is 13% to 33%, which can better improve the mechanical properties and processing properties of the flame retardant nylon material and ensure that the toughening agent system has both mechanical strength and toughness.

[0010] In some embodiments of the flame-retardant nylon material, the grafted SEBS includes a first grafted SEBS and a second grafted SEBS; the styrene content in the first grafted SEBS is less than the styrene content in the second grafted SEBS;

[0011] The ungrafted SEBS includes a first ungrafted SEBS and a second ungrafted SEBS, and the styrene content in the first ungrafted SEBS is less than the styrene content in the second ungrafted SEBS.

[0012] The grafted SEBS with low styrene content is compounded with the grafted SEBS with high styrene content, and the ungrafted SEBS with low styrene content is compounded with the ungrafted SEBS with high styrene content, so as to facilitate the preparation of the grafted SEBS and ungrafted SEBS with the required styrene content.

[0013] In some embodiments of the flame-retardant nylon material, the mass ratio of the toughening agent composition to the flame retardant composition and the polyamide resin is (6-22):(10-30):(20-60).

[0014] By compounding the toughening agent composition with the flame retardant composition and the polyamide resin in a suitable ratio, a flame retardant nylon material having both good flame retardancy and mechanical properties can be obtained.

[0015] In some embodiments of the flame retardant nylon material, the flame retardant composition includes at least one of an organic hypophosphite, an inorganic phosphate, and melamine polyphosphate.

[0016] By reducing the amount of melamine polyphosphate by compounding with at least one of an organic hypophosphite and an inorganic phosphate, the flame retardant effect can be ensured to remain unchanged, and the impact of melamine polyphosphate modification on the impact properties of the flame retardant nylon material can be reduced. In some embodiments of the above flame retardant nylon material, the flame retardant composition includes an organic hypophosphite, an inorganic phosphate and a melamine polyphosphate;

[0017] The mass ratio of the organic hypophosphite, the inorganic phosphate and the melamine polyphosphate is (5-20):(2-10):(2-10).

[0018] The compounding of organic hypophosphite and melamine polyphosphate can utilize the gas phase flame retardant mechanism of melamine polyphosphate and the characteristics of inhibiting the generation and activity of free radicals during combustion to achieve synergistic flame retardancy and better flame retardant performance; the phosphate function in inorganic phosphate can react with melamine polyphosphate to form chemical bonds, and can also react with nylon to form chemical bonds, so that it forms a good chemical combination with melamine polyphosphate and polyamide resin, and has little effect on mechanical properties.

[0019] In some embodiments of the flame retardant nylon material, the organic phosphate is selected from alkyl hypophosphites.

[0020] The flame retardant properties of alkyl hypophosphites and melamine polyphosphates are better, and the alkyl group in the alkyl hypophosphites can react with the polyamide resin to form a chemical bond, so that it forms a good chemical bond with the polyamide resin and has little effect on the mechanical properties.

[0021] In some embodiments of the flame-retardant nylon material, the inorganic phosphate is selected from any one of diammonium hydrogen phosphate, monoammonium phosphate, ammonium polyphosphate, calcium phosphate, aluminum phosphite, and zinc phosphate, or a mixture of any two of them.

[0022] In some embodiments of the flame retardant nylon material described above, the flame retardant nylon material further comprises a flame retardant synergist;

[0023] The flame retardant synergist is selected from at least one of sodium metaphosphate, aluminum metaphosphate and zinc borate.

[0024] In some embodiments of the flame-retardant nylon material, the flame-retardant nylon material further comprises chopped glass fibers modified by a coupling agent, and the mass ratio of the chopped glass fibers modified by a coupling agent to the polyamide resin is (10-40):(20-60).

[0025] The nylon is modified by short-cut glass fiber modified by coupling agent, and has excellent mechanical properties.

[0026] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. DETAILED DESCRIPTION

[0027] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art to which the present application belongs. The terms used herein in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. The words "include" or "comprises" and the like used herein mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. The terms "and / or" or "and / or" used herein include any and all combinations of one or more related listed items.

[0029] The flame retardant nylon material provided in the present application is added with a flame retardant composition to improve the flame retardant properties of the nylon material. The flame retardant composition uses melamine polyphosphate compounded with at least one of an organic hypophosphite and an inorganic phosphate, which can effectively improve the flame retardant properties of the nylon material while not affecting the color of the nylon material itself and having little effect on the mechanical properties of the nylon material.

[0030] Some preferred embodiments of the present application are described below. It should be noted that the following description is for the purpose of illustration and is not intended to limit the scope of protection of the present application. The steps involved in the present application can be performed accurately in sequence, or various steps can be processed in reverse order or simultaneously. At the same time, other operations can also be added to these processes, or one or more operations can be removed from these processes.

[0031] The present application discloses a flame retardant nylon material, which comprises a flame retardant composition, a polyamide resin and a toughening agent composition; wherein the toughening agent composition comprises grafted SEBS and ungrafted SEBS.

[0032] It should be noted that polyamide resin, i.e. nylon, is a condensation-type polymer compound with a -CONH structure in the molecule, usually obtained by polycondensation of dibasic acid and diamine, referred to as PA. PA includes PA6, PA66, PAll, PA12, PA46, PA610, PA612, PA1010, etc., as well as many new varieties such as developed semi-aromatic nylon PA6T and special nylon. In some embodiments of the present application, the polyamide resin is selected from any one of PA6, PA66 or a copolymer of PA6 and PA66. PA6, PA66 or a copolymer of PA6 and PA66 can be directly prepared in a model by anion ring-opening polymerization, called cast nylon, which is convenient for manufacturing large plastic parts.

[0033] In some embodiments, the weight average of the styrene content in the grafted SEBS is 13% to 30%, and the mass proportion of the grafted SEBS in the flame-retardant nylon material is 1% to 10%;

[0034] The weighted average value of the styrene content in the ungrafted SEBS is 13-33%, and the mass proportion of the ungrafted SEBS in the flame-retardant nylon material is 2-12%.

[0035] SEBS is the abbreviation of Styrene Ethylene Butylene Styrene, which refers to hydrogenated styrene-butadiene block copolymer. It is a linear triblock copolymer with polystyrene as the terminal segment and ethylene-butene copolymer obtained by hydrogenating polybutadiene as the middle elastic block.

[0036] Regardless of whether SEBS is grafted or ungrafted, the styrene content and block structure are the main factors that determine the mechanical properties and processing properties of SEBS. The appropriate styrene content will ensure that the toughening agent system has both mechanical strength and toughness. The grafted and ungrafted SEBS blend system has the function of regulating the fluidity of the material and is suitable for processing samples of different shapes.

[0037] For example, the weighted average value of the styrene content in the grafted SEBS can be 13%, 15%, 18%, 20%, 21%, 24%, 27%, 30%, or any value within the above numerical range. The mass proportion of the grafted SEBS in the flame retardant nylon material can be 1%, 3%, 5%, 7%, 8%, 9%, 10%, or any value within the above numerical range.

[0038] The weighted average value of the styrene content in the ungrafted SEBS can be 13%, 15%, 17%, 19%, 21%, 25%, 27%, 30%, 33%, or any value within the above numerical range. The mass proportion of the ungrafted SEBS in the flame retardant nylon material can be 2%, 4%, 5%, 7%, 9%, 10%, 11%, 12%, or any value within the above numerical range.

[0039] Further, the grafted SEBS includes a first grafted SEBS and a second grafted SEBS; the styrene content in the first grafted SEBS is less than the styrene content in the second grafted SEBS;

[0040] The ungrafted SEBS includes a first ungrafted SEBS and a second ungrafted SEBS, and the styrene content in the first ungrafted SEBS is less than the styrene content in the second ungrafted SEBS.

[0041] The required styrene content can be easily prepared by compounding grafted SEBS with low styrene content and grafted SEBS with high styrene content, or compounding ungrafted SEBS with low styrene content and ungrafted SEBS with high styrene content.

[0042] Furthermore, the mass ratio of the toughening agent composition to the flame retardant composition and the polyamide resin is (6-22):(10-30):(20-60).

[0043] For example, the mass ratio of the toughening agent composition to the flame retardant composition and the polyamide resin is 6:10:20, 6:15:30, 6:20:35, 6:25:50, 6:10:20, 6:30:60, 15:10:20, 15:30:60, 15:20:47, 22:10:20, 22:30:60, 22:15:30, 22:23:55, or any ratio within the above numerical range.

[0044] In some embodiments, the flame retardant composition includes at least one of an organic hypophosphite, an inorganic phosphate, and melamine polyphosphate.

[0045] By reducing the amount of melamine polyphosphate by compounding with at least one of organic hypophosphite and inorganic phosphate, the flame retardant effect can be ensured to remain unchanged, and the influence of melamine polyphosphate modification on the impact performance of flame retardant nylon materials can be reduced.

[0046] The organic hypophosphite and the inorganic phosphate can be compounded with the melamine polyphosphate alone, or the two can be mixed and compounded with the melamine polyphosphate. When the organic hypophosphite and the inorganic phosphate are mixed and compounded with the melamine polyphosphate, the flame retardant composition includes the organic hypophosphite, the inorganic phosphate and the melamine polyphosphate;

[0047] The mass ratio of the organic hypophosphite, inorganic phosphate and melamine polyphosphate is (5-20):(2-10):(2-10). For example, the mass ratio of the organic hypophosphite, inorganic phosphate and melamine polyphosphate can be 5:2:2, 5:4:3, 5:6:7, 5:9:10, 5:10:10, 10:3:4, 10:7:3, 10:9:4, 15:2:2, 15:3:7, 15:8:3, 20:2:2, 20:5:9, 20:7:4, or any ratio within the above ratio range.

[0048] Specific examples of the inorganic phosphates include sodium phosphate, sodium hydrogen phosphate, sodium dihydrogen phosphate, potassium phosphate, potassium hydrogen phosphate, potassium dihydrogen phosphate, ammonium phosphate, diammonium hydrogen phosphate, ammonium dihydrogen phosphate, ammonium polyphosphate, ammonium hydrogen phosphate, calcium phosphate, calcium dihydrogen phosphate, aluminum phosphite, zinc phosphate, and the like.

[0049] The compounding of organic hypophosphite and melamine polyphosphate can utilize the gas phase flame retardant mechanism of melamine polyphosphate and the characteristics of inhibiting the generation and activity of free radicals during combustion to achieve synergistic flame retardancy and better flame retardant performance; the phosphate function in inorganic phosphate can react with melamine polyphosphate to form chemical bonds, and can also react with nylon to form chemical bonds, so that it forms a good chemical combination with melamine polyphosphate and polyamide resin, and has little effect on mechanical properties.

[0050] In some embodiments, the organic phosphate is selected from alkyl hypophosphites.

[0051] The term "alkyl" may be a substituted or unsubstituted alkyl. In this document, the term "alkyl" used alone or in combination may be linear, branched or cyclic, and the number of carbon atoms may be, for example, C1-C5, C1-C4, C1-C3, C1-C2, etc. As an example, the alkyl group includes, but is not limited to, methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, tert-butyl, etc. Wherein, "substituted" means that at least one hydrogen of a substituent or a compound is replaced by a substituent, for example, deuterium, hydroxyl, amino, thiol, halogen, cyano, nitro, carbonyl, ester, oxo, imido, phosphine oxide, trifluoromethyl, trifluoromethoxy, C1-C3 alkyl, C1-C3 alkoxy, and any combination thereof. "Unsubstituted" means that a hydrogen atom remains as a hydrogen atom and is not replaced by another substituent.

[0052] It should be noted that the above examples are only for illustrative purposes and are not intended to limit the scope of protection of this application. Any modification / adjustment / update made under the teachings of this application is within the scope of protection of this application.

[0053] The flame retardant properties of alkyl hypophosphites and melamine polyphosphates are better, and the alkyl group in the alkyl hypophosphites can react with the polyamide resin to form a chemical bond, so that it forms a good chemical bond with the polyamide resin and has little effect on the mechanical properties.

[0054] In some embodiments of the flame-retardant nylon material, the inorganic phosphate is selected from any one of diammonium hydrogen phosphate, monoammonium phosphate, ammonium polyphosphate, calcium phosphate, aluminum phosphite, and zinc phosphate, or a mixture of any two of them.

[0055] The ungrafted SEBS includes a first ungrafted SEBS and a second ungrafted SEBS, the styrene content in the first ungrafted SEBS is less than the styrene content in the second ungrafted SEBS, and the weighted average value of the styrene content of the two grafted SEBS is 13% to 33%.

[0056] In some embodiments, the flame retardant nylon material further comprises a flame retardant synergist;

[0057] The flame retardant synergist is selected from at least one of sodium metaphosphate, aluminum metaphosphate and zinc borate.

[0058] Preferably, the mass proportion of the flame retardant synergist added in the flame retardant nylon material is 0.3-2%, for example, the mass proportion of the flame retardant synergist added in the flame retardant nylon material can be 0.3%, 0.7%, 1%, 1.2%, 1.5%, 1.7%, 1.9%, 2%, or any point value within the above numerical range. The amount of the flame retardant synergist added is very small and has almost no effect on the mechanical properties of the flame retardant nylon material.

[0059] In some embodiments, the flame retardant nylon material further comprises short glass fibers modified by a coupling agent, and the mass ratio of the short glass fibers modified by a coupling agent to the polyamide resin is (10-40):(20-60). For example, the mass ratio of the short glass fibers modified by a coupling agent to the polyamide resin can be 10:20, 10:25, 10:30, 10:37, 10:43, 10:55, 10:60, 40:20, 40:60, 40:33, 40:47, 40:53, 27:33, 27:56, 31:25, 33:47, or any ratio within the above numerical range.

[0060] Chopped glass fiber, also known as chopped glass fiber strands, is made by melting quartz sand at high temperature, using a special impregnation (softener) to draw the strands, and then chopped online by wet method, or chopped product glass fiber. Coupling agent, also known as surface modifier, is a plastic additive used to improve the interface properties between synthetic resin and inorganic filler or reinforcing material. Chopped glass fiber can be flat glass fiber or glass fiber with a circular cross section. Chopped glass fiber modified by coupling agent is used to modify nylon, and has excellent mechanical properties.

[0061] In some embodiments, the flame retardant nylon material may further include other additives, including but not limited to antioxidants and lubricants. The antioxidant may be used to improve the durability of the flame retardant material and maintain the long-term performance of the flame retardant material. Exemplarily, the antioxidant is selected from any one of antioxidant 1790 and antioxidant 626 or a combination of both.

[0062] For example only, the lubricant is selected from any one or a combination of EBS and stearate. Among them, the stearate can be any one or a combination of calcium stearate, sodium stearate, zinc stearate, and barium stearate. The lubricant can improve the processing performance, surface properties and mechanical properties of the flame retardant nylon material.

[0063] It should be noted that the above examples are only for illustrative purposes and are not intended to limit the scope of protection of this application. Any modification / adjustment / update made under the teachings of this application is within the scope of protection of this application.

[0064] In some embodiments, the flame retardant nylon material may further include other additives, such as a release agent, a heat stabilizer, a plasticizer, a crystal nucleating agent, an antibacterial agent, a heat stabilizer, a tackifier, or additives for achieving other functions.

[0065] In some embodiments, the flame retardant nylon material includes the following components in parts by weight:

[0066]

[0067] In some embodiments, the flame retardant nylon material includes the following components in parts by weight:

[0068]

[0069] The present application is further described in detail below in conjunction with the examples. It should be noted that the following examples are only used to illustrate the present application and are not used to limit the scope of protection claimed in the present application.

[0070] Embodiment 1: In this embodiment, a flame retardant nylon material is provided, including 34.7% by weight of PA6 (BL3280H of Sinopec Baling Petrochemical Branch), 15% by weight of aluminum diethylphosphinate (Dingxin Plastic Raw Materials Co., Ltd., Dongguan, Guangdong), 5.3% by weight of melamine polyphosphate (Jiangsu Runfeng Synthetic Technology Co., Ltd.), 4.4% by weight of phosphate, 30% by weight of short-cut glass fiber modified by coupling agent (Chongqing International Composite Materials Co., Ltd., ECS301HP-3-H), 1% by weight of grafted SEBS with a styrene content of 13% (Globalprene 9924 of Lee Changrong Chemical, Taiwan, China), 2% by weight of grafted SEBS with a styrene content of 30% (Globalprene 9901 of Lee Changrong Chemical, Taiwan, China), and 2% by weight of ungrafted SEBS with a styrene content of 13% (Globalprene 9557D), ungrafted SEBS with a styrene content of 33% (Globalprene 7551, Lee Changrong Chemical, Taiwan, China) with a mass ratio of 4%, flame retardant synergist (aluminum metaphosphate with a mass ratio of 0.6%, Hubei Xingdongcheng Chemical Co., Ltd.), antioxidant (antioxidant 1790 with a mass ratio of 0.5%, Nanjing Milan New Materials Co., Ltd.) and lubricant (zinc stearate with a mass ratio of 0.5%, Changzhou Qidi Chemical Co., Ltd.). The specific mass ratios are shown in Table 1.

[0071] Example 2: The difference between this example and example 1 is that in this example, the polyamide resin is a copolymer of PA6 and PA66 (C40LN from BASF, Germany).

[0072] Example 3: The difference between this example and Example 1 is that in this example, the polyamide resin is PA66 (Pingdingshan Shenma EPR24).

[0073] Example 4: The difference between this example and Example 1 is that in this example, the toughening agent composition includes grafted SEBS with a styrene content of 13% and ungrafted SEBS with a styrene content of 30%, the mass proportion of the grafted SEBS in the flame-retardant nylon material is 3%, and the mass proportion of the ungrafted SEBS in the flame-retardant nylon material is 6%.

[0074] Example 5: The difference between this example and Example 1 is that in this example, the toughening agent composition includes grafted SEBS with a styrene content of 30% and ungrafted SEBS with a styrene content of 33%, the mass proportion of grafted SEBS in the flame retardant nylon material is 3%, and the mass proportion of ungrafted SEBS in the flame retardant nylon material is less than 6%.

[0075] Example 6: The difference between this example and Example 1 is that in this example, the toughening agent composition includes grafted SEBS and ungrafted SEBS in a mass ratio of 1:1, wherein the grafted SEBS includes a first grafted SEBS with a styrene content of 13% and a second grafted SEBS with a styrene content of 30%, the mass proportion of the first grafted SEBS in the flame-retardant nylon material is 2%, and the mass proportion of the second grafted SEBS in the flame-retardant nylon material is 4%; the ungrafted SEBS includes a first ungrafted SEBS with a styrene content of 13% and a second ungrafted SEBS with a styrene content of 33%, the mass proportion of the first ungrafted SEBS in the flame-retardant nylon material is 2%, and the mass proportion of the second ungrafted SEBS in the flame-retardant nylon material is 4%.

[0076] Example 7: The difference between this example and Example 1 is that in this example, the antioxidant is antioxidant 626 (Dongguan Xingyuan Chemical Co., Ltd.).

[0077] Example 8: The difference between this example and Example 1 is that in this example, the antioxidant is antioxidant 626 (Dongguan Xingyuan Chemical Co., Ltd.), and the lubricant is EBS (Guangzhou Jinqixin Chemical New Materials Co., Ltd.).

[0078] Example 9: The difference between this example and Example 1 is that in this example, the addition of antioxidant is cancelled, and the lubricant uses EBS (Guangzhou Jinqixin Chemical New Materials Co., Ltd.) with a mass percentage of 0.5% and zinc stearate (Changzhou Qidi Chemical Co., Ltd.) with a mass percentage of 0.5%.

[0079] Comparative Example 1: Compared with Example 1, the difference of this comparative example is that the mass proportion of PA6 is 59.7%, and the mass proportion of the short-cut glass fiber modified by the coupling agent is 50%.

[0080] Comparative Example 2: Compared with Example 1, the difference of this comparative example is that the mass proportion of PA6 is 14.7%, and the mass proportion of the short-cut glass fiber modified by the coupling agent is 5%.

[0081] Comparative Example 3: Compared with Example 1, the difference of this comparative example is that the mass proportion of PA6 is 42.7%, the mass proportion of grafted SEBS with a styrene content of 13% is 0.17%, the mass proportion of grafted SEBS with a styrene content of 30% is 0.33%, the mass proportion of ungrafted SEBS with a styrene content of 13% is 0.17%, and the mass proportion of ungrafted SEBS with a styrene content of 33% is 0.33%.

[0082] Comparative Example 4: Compared with Example 1, the difference of this comparative example is that the mass proportion of PA6 is 16.7%, the mass proportion of grafted SEBS with a styrene content of 13% is 4%, the mass proportion of grafted SEBS with a styrene content of 30% is 8%, the mass proportion of ungrafted SEBS with a styrene content of 13% is 5%, and the mass proportion of ungrafted SEBS with a styrene content of 33% is 10%.

[0083] Comparative Example 5: Compared with Example 1, the difference of this comparative example is that the mass proportion of PA6 is 55%, the mass proportion of diethyl aluminum hypophosphite is 3%, the mass proportion of melamine polyphosphate is 1%, and the mass proportion of phosphate is 1%.

[0084] Comparative Example 6: Compared with Example 1, the difference of this comparative example is that the mass proportion of PA6 is 10.4%, the mass proportion of diethyl aluminum hypophosphite is 22%, the mass proportion of melamine polyphosphate is 12%, the mass proportion of phosphate is 12%, and the mass proportion of flame retardant synergist is 3%.

[0085] The flame retardant grade of the products made of the flame retardant nylon materials obtained in Examples 1-9 and Comparative Examples 1-6 was tested. The test results are shown in Table 2.

[0086]

[0087]

[0088] The products made of the flame-retardant nylon materials obtained in Examples 1-9 and Comparative Examples 1-6 were tested for tensile strength and elongation at break. The test results are shown in Table 2.

[0089] The products made of the flame-retardant nylon materials obtained in Examples 1-9 and Comparative Examples 1-6 were subjected to a simply supported beam notched impact test. The test results are shown in Table 2.

[0090] Table 2

[0091]

[0092]

[0093] Note: NG means not in compliance with UL criteria.

[0094] It can be seen from Table 1 and Table 2 that the flame-retardant nylon material provided in the embodiment of the present application can achieve the same flame-retardant grade as the comparative example, and can take into account the tensile strength, elongation at break, flexural modulus, and flexural strength at the same time. At the same time, the simply supported beam notched impact results show that the toughness of the material is not significantly reduced.

[0095] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0096] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0097] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A flame retardant nylon material, characterized in that: The flame retardant nylon material comprises a flame retardant composition, a polyamide resin and a toughening agent composition; wherein the toughening agent composition comprises grafted SEBS and ungrafted SEBS.

2. The flame retardant nylon material according to claim 1, characterized in that: The weight average value of the styrene content in the grafted SEBS is 13% to 30%, and the mass proportion of the grafted SEBS in the flame-retardant nylon material is 1% to 10%; The weight average value of the styrene content in the ungrafted SEBS is 13-33%, and the mass proportion of the ungrafted SEBS in the flame-retardant nylon material is 2%-12%.

3. The flame retardant nylon material according to claim 2, characterized in that: The grafted SEBS includes a first grafted SEBS and a second grafted SEBS; the styrene content in the first grafted SEBS is less than the styrene content in the second grafted SEBS; The ungrafted SEBS includes a first ungrafted SEBS and a second ungrafted SEBS, and the styrene content in the first ungrafted SEBS is less than the styrene content in the second ungrafted SEBS.

4. The flame retardant nylon material according to any one of claims 1 to 3, characterized in that: The mass ratio of the toughening agent composition to the flame retardant composition and the polyamide resin is (6-22):(10-30):(20-60).

5. The flame retardant nylon material according to claim 1, characterized in that: The flame retardant composition includes at least one of an organic hypophosphite and an inorganic phosphate and melamine polyphosphate.

6. The flame retardant nylon material according to claim 5, characterized in that: The flame retardant composition comprises organic hypophosphite, inorganic phosphate and melamine polyphosphate; The mass ratio of the organic hypophosphite, the inorganic phosphate and the melamine polyphosphate is (5-20):(2-10):(2-10).

7. The flame retardant nylon material according to claim 5, characterized in that: The organic hypophosphite is selected from alkyl hypophosphites.

8. The flame retardant nylon material according to claim 5, characterized in that: The inorganic phosphate is selected from any one of diammonium hydrogen phosphate, monoammonium phosphate, ammonium polyphosphate, calcium phosphate, aluminum phosphite, and zinc phosphate, or a mixture of any two of them.

9. The flame retardant nylon material according to claim 1, characterized in that: The flame retardant nylon material also includes a flame retardant synergist; The flame retardant synergist is selected from at least one of sodium metaphosphate, aluminum metaphosphate and zinc borate.

10. The flame retardant nylon material according to claim 1, characterized in that: The flame-retardant nylon material further comprises short-cut glass fibers modified by a coupling agent, and the mass ratio of the short-cut glass fibers modified by a coupling agent to the polyamide resin is (10-40):(20-60).

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