A nylon material and its preparation method and application

Abstract

The invention discloses a nylon material and its preparation method and application. The raw materials for preparation include: nylon material, flame retardant synergist, heat stabilizer, poly-olefin graft copolymer; nylon material includes polyphthalamide, polylaurolactam derivative, polyhexamethylene adipamide; the raw materials for preparation of polyphthalamide include phthalic acid and isophthalic acid mixture; flame retardant synergist includes at least one of modified MMP, lanthanum oxide, silicon flame retardant, zinc borate, stannate and MCA; modified MMP is MMP with silicone oil coated on the surface; heat stabilizer includes one of S-EED, Lugman H10, cuprous iodide and potassium iodide; poly-olefin graft copolymer includes at least one of grafted SEBS, grafted POE and grafted PE. The nylon material of the invention solves the problems of the welding material in the existing SMT surface mounting equipment technology that is easy to turn yellow at high temperature, the bonding line strength is low, and the welding time is easy to blister.

Description

Technical Field

[0001] The invention belongs to the technical field of polymer materials, and specifically relates to a nylon material and a preparation method and application thereof. Background Art

[0002] SMT is the surface mount technology, which is called Surface Mount Technology in English. It is a technology that mounts pinless or short-lead surface mount components on the surface of printed circuit boards or other substrates, and connects them by reflow soldering. The existing SMT surface mount technology has problems such as the welding materials cannot withstand the high temperature of 270℃ in a short time, the yellowing resistance of the welding materials is poor after welding, and the materials blister during welding.

[0003] Therefore, it is necessary to provide a nylon material and its preparation method and application, which can solve the problems of the welding material turning yellow easily at high temperature, low bonding line strength and easy blistering during welding time in the existing SMT (surface mount equipment) technology. 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 proposes a nylon material and its preparation method and application, which solves the problems of the welding material in the existing SMT (surface mount equipment) technology that is prone to yellowing at high temperature, low bonding line strength, and easy blistering during welding time.

[0005] The invention also provides a method for preparing the nylon material.

[0006] The invention also provides an application of the nylon material in insulating materials.

[0007] A nylon material according to the first aspect of the present invention, the raw materials for preparation include: nylon material, flame retardant synergist, thermal stabilizer, poly-olefin graft copolymer;

[0008] The nylon material includes polyphthalamide, polylaurolactam derivatives, and polyhexamethylene adipamide;

[0009] The raw materials for preparing the polyphthalamide include a mixture of phthalic acid and isophthalic acid;

[0010] The flame retardant synergist includes at least one of modified MMP, lanthanum oxide, silicon flame retardant, zinc borate, stannate and MCA;

[0011] The modified MMP is an MMP with silicone oil coated on the surface;

[0012] The thermal stabilizers include S-EED and Lugman H10;

[0013] The polyolefin graft copolymer includes at least one of grafted SEBS elastomer, grafted POE and grafted PE.

[0014] A nylon material according to an embodiment of the present invention has at least the following beneficial effects:

[0015] 1. In the present invention, the content of functional groups of water-absorbing resin and hydrophilic resin in nylon material is reduced by compounding raw materials, and the water absorption rate of the material is controlled, thereby avoiding the problem of blistering of the material during welding time.

[0016] 2. In the present invention, by compounding the raw materials, S-EED heat stabilizer is selected as the heat stabilizer in the present invention, which avoids the discoloration of nylon materials due to instantaneous high temperature materials. Lugman H10 can adsorb small molecular substances remaining in nylon 6, and S-EED blocks relatively active groups from the structure. The compounding of the two avoids corrosion of metal contacts. The graft copolymer in the present invention provides polarity between materials and improves the water absorption of materials by blocking.

[0017] 3. The nylon material of the present invention has low preparation cost and is easy to process, thus expanding the scope of use of downstream customers.

[0018] According to some embodiments of the present invention, the polylaurolactam derivative includes at least one of nylon 12 and nylon 612.

[0019] According to some embodiments of the present invention, the polyphthalamide is 30-40 parts, the polylaurolactam derivative is 5-10 parts, the polyhexamethylene adipamide is 5-10 parts, and the flame retardant synergist is 3-10 parts by weight.

[0020] According to some embodiments of the present invention, the raw materials for preparing the nylon material further include functional additives, halogen-free flame retardants and glass fibers.

[0021] According to some embodiments of the present invention, the functional auxiliary agent includes at least one of a core agent, silicone powder and an anti-hydrolysis agent.

[0022] According to some embodiments of the present invention, in parts by weight, the functional additive is 1 to 3 parts, the glass fiber is 30 to 40 parts, and the flame retardant synergist is 3 to 10 parts.

[0023] According to some embodiments of the present invention, the functional additive is 1 to 3 parts by weight, and the halogen-free flame retardant is 10 to 16 parts by weight.

[0024] According to some embodiments of the present invention, the nucleating agent includes CAV102.

[0025] According to some embodiments of the present invention, the glass fiber includes ECS11-4.5-560H.

[0026] According to some embodiments of the present invention, the thermal stabilizer further comprises one of cuprous iodide and potassium iodide.

[0027] According to some embodiments of the present invention, the halogen-free flame retardant includes diethyl hypophosphite.

[0028] According to a second aspect of the present invention, a method for preparing the above-mentioned nylon material comprises mixing the nylon material, the flame retardant synergist, and the poly-olefin graft copolymer and then melt-granulating the mixture.

[0029] According to some embodiments of the present invention, the mixing time is 5 to 8 minutes.

[0030] According to some embodiments of the present invention, the melting temperature is 270-310°C.

[0031] According to some preferred embodiments of the present invention, the preparation method of the above-mentioned nylon material includes first mixing the flame retardant synergist on a high-speed mixer, then adding resin, flame retardant, and functional auxiliary in sequence, mixing evenly at a low speed, and then feeding the discharged material into a twin-screw extruder, adding short-cut glass fibers from the side feed, and obtaining the finished product through melt plasticization in the extruder, extrusion from the die, drawing, cooling, pelletizing, and drying.

[0032] According to some embodiments of the present invention, the processing temperature of the twin-screw extruder is 270-310°C.

[0033] According to some embodiments of the present invention, the screw speed of the twin-screw extruder is 350-400 r / min.

[0034] According to some embodiments of the present invention, the twin-screw extruder is a 50 machine.

[0035] According to a third aspect of the present invention, an embodiment of the nylon material is used in surface mount equipment technology. DETAILED DESCRIPTION

[0036] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below by reference are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0037] The polyphthalamide (high temperature nylon PPA) of the present invention was purchased from Shandong Xianglong Company;

[0038] Polylaurolactam derivatives (one or more of nylon 12 and nylon 612;)

[0039] Polylaurolactam derivatives were purchased from Shandong Xianglong New Materials;

[0040] Polyhexamethylene adipamide (nylon 66) is one or more of Henan Shenma EPR27 or EPR24;

[0041] The heat stabilizer is one or more of Brueggemann H10, cuprous iodide, potassium iodide, and S-EED;

[0042] The polyolefin graft copolymer is one or more of grafted POE, grafted PE and grafted SEBS;

[0043] The polyolefin graft copolymers are all commercially available products;

[0044] The halogen-free flame retardant is an organic diethyl hypophosphite (ADP) known to those skilled in the art;

[0045] The flame retardant synergist is one or more of modified MPP, lanthanum oxide, silicon flame retardant, zinc borate, stannate and melamine cyanurate (MCA);

[0046] Modified MM was purchased from Guangdong Daosheng Technology Co., Ltd.;

[0047] The functional additive is one or more of a nucleating agent (CAV102), silicone powder, and an anti-hydrolysis agent;

[0048] The nucleating agent (CAV102) was purchased from Clariant;

[0049] The anti-hydrolysis agent was purchased from Shanghai Kaiyin Chemical;

[0050] The fiberglass is Jushi ECS11-4.5-560H.

[0051] Example 1

[0052] This embodiment provides a nylon material, and the specific components are as follows:

[0053] By weight:

[0054]

[0055]

[0056] Example 2

[0057] This embodiment provides a method for preparing a nylon material, and the specific method is as follows:

[0058] According to the composition of the nylon material in Example 1, PPA, PA12 and PA66 were poured into a mixer and mixed at a low speed for 10 minutes, and then ADP, modified MMP and polyolefin elastomer were added and mixed in a mixer for 5 minutes. The temperature of each section of the extruder from the feed port to the head was set at 270-310°C. The mixture was melt-plasticized and extruded into granules to obtain a modified PPA product DND4-1.

[0059] The modified MMP in the present invention is a modified MMP obtained by mixing silicone oil and MMP.

[0060] Example 3

[0061] This embodiment provides a nylon material, and the specific components are as follows:

[0062] By weight:

[0063]

[0064] Example 4

[0065] This embodiment provides a method for preparing a nylon material, and the specific method is as follows:

[0066] According to the composition of the nylon material in Example 3, PPA, PA12 and PA66 were poured into a mixer and mixed at a low speed for 10 minutes, and then ADP, coated MPP and polyolefin elastomer were added and mixed in a mixer for 5 minutes. The temperature of each section of the extruder from the feed port to the head was set at 270-310°C. The mixture was melt-plasticized and extruded into granules to obtain a modified PPA product DND4-2.

[0067] Example 5

[0068] This embodiment provides a nylon material. The difference between this embodiment and Example 1 is that the grafted SEBS is replaced by the grafted POE, and the other conditions are the same.

[0069] Example 6

[0070] This embodiment provides a method for preparing a nylon material. The difference between this embodiment and embodiment 2 is that the preparation is carried out according to the components in embodiment 5, and the other conditions are the same.

[0071] Comparative Example 1

[0072] This comparative example provides a nylon material, and the specific components are as follows:

[0073] By weight:

[0074]

[0075] Comparative Example 2

[0076] This comparative example provides a method for preparing a nylon material. The difference between this comparative example and Example 2 is that the preparation is carried out according to the components in Comparative Example 1, and the other conditions are the same.

[0077] Comparative Example 3

[0078] This comparative example provides a nylon material, and the specific components are as follows:

[0079] By weight:

[0080]

[0081]

[0082] Comparative Example 4

[0083] This comparative example provides a method for preparing a nylon material. The difference between this comparative example and Example 2 is that the preparation is carried out according to the components in Comparative Example 3, and the other conditions are the same.

[0084] Comparative Example 5

[0085] This comparative example provides a nylon material, and the specific components are as follows:

[0086] By weight:

[0087]

[0088] Comparative Example 6

[0089] This comparative example provides a method for preparing a nylon material. The difference between this comparative example and Example 2 is that the preparation is carried out according to the components in Comparative Example 5, and the other conditions are the same.

[0090] Test Example 1

[0091] This test example tests the heat deformation temperature, water absorption rate and flame retardancy of the nylon materials in the above embodiments and comparative examples. The test results are shown in Table 2. The specific method is as follows:

[0092] (1) Heat deformation temperature GB / T 1634

[0093] (2) Water absorption GB / T 1034

[0094] (3) Flame retardant grade UL-94

[0095] Table 2 Performance test results of the embodiment

[0096]

[0097]

[0098] It can be seen from Table 2 that the formula systems selected in the present invention have their own advantages. The star-shaped grafted SEBS elastomer is selected. Due to its strong structural activity, it can significantly improve the compatibility between the flame retardant system, the resin and the glass fiber; the formula system uses sodium phosphate stabilizers, which can improve the color stability of the material during the production process and lay the foundation for the subsequent material color matching; although S-EED has a good effect as a traditional light stabilizer, this system is only used as a heat stabilizer to avoid instantaneous high temperature material discoloration; MPP base material is commercially available, and it is physically and chemically coated with silicone oil and chemicals of a certain molecular weight to avoid high temperature decomposition.

[0099] The above description is only a specific embodiment of the present invention, and the scope of protection of the present invention cannot be limited by this. Any non-substantial changes made by using the present invention, changes in certain process technologies derived from the concept and specific embodiments of the present invention, or non-substantial changes such as replacement of related technologies, or direct or indirect application in other related technical fields, all fall within the scope of protection required by the present invention.

Claims

1. A nylon material, characterized in that: The raw materials for preparation are as follows by weight: 30 parts of polyphthalamide, 125 parts of nylon, 5 parts of polyhexamethylene adipamide, 0.2 parts of Lugman H10, 0.3 parts of S-EED, 2 parts of grafted SEBS, 14 parts of diethyl hypophosphite, 5 parts of modified MMP, 0.5 parts of CAV102, and 40 parts of ECS11-2.5-560H; The modified MMP is an MMP with silicone oil coated on the surface.

2. An application of the nylon material as claimed in claim 1 in surface mount equipment technology.

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