Search

CN-122011760-A - Flame-retardant reinforced nylon material and preparation method thereof

CN122011760ACN 122011760 ACN122011760 ACN 122011760ACN-122011760-A

Abstract

The invention belongs to the technical field of high polymer materials, and discloses a flame-retardant reinforced nylon material and a preparation method thereof. The flame-retardant reinforced nylon material comprises synergistic modified PA66, an organic micromolecule function regulator, a flame retardant, a reinforcing filler, an antioxidant and a lubricant, wherein the synergistic modified PA66 is obtained by carrying out synergistic modification on phytic acid, diethylenetriamine pentaacetic acid and octa (3-aminopropyl) silsesquioxane under the action of an amino group at the chain end of the PA66 molecule through ion association, chelating coordination and a silicon-oxygen cage structure limit domain, and the organic micromolecule function regulator is 2, 6-diaminoanthraquinone. According to the invention, the synergistic modified PA66 structure is constructed and the organic micromolecules with condensed ring aromatic structures are introduced, so that the material can form a stable and compact carbon layer structure in the combustion process, thereby effectively improving the flame retardant property of the material and simultaneously improving the mechanical property and structural stability of the material. The preparation method is simple and is suitable for industrial production.

Inventors

  • FAN GUANGDE
  • FAN YABIN
  • ZHAO XIAOLIANG
  • LIU XUANXUAN

Assignees

  • 平顶山市科隆新材料有限公司

Dates

Publication Date
20260512
Application Date
20260320

Claims (10)

  1. 1. The flame-retardant reinforced nylon material is characterized by comprising, by weight, 1-8 parts of a synergistic modified PA 6660-85 parts of an organic small molecule function regulator, 8-20 parts of a flame retardant, 5-25 parts of a reinforcing filler, 0.1-1 part of an antioxidant and 0.2-2 parts of a lubricant, wherein the synergistic modified PA66 is PA66 obtained by carrying out ion association, chelation coordination and silicone cage structure limited domain synergistic modification on phytic acid, diethylenetriamine pentaacetic acid and octa (3-aminopropyl) silsesquioxane under the action of an amino group at the end of a PA66 molecular chain.
  2. 2. The flame-retardant reinforced nylon material according to claim 1, wherein the synergistic modified PA66 comprises, by weight, PA 6670-95 parts, phytic acid 0.5-4 parts, diethylenetriamine pentaacetic acid 0.2-3 parts, and octa (3-aminopropyl) silsesquioxane 0.5-5 parts.
  3. 3. The flame retardant reinforced nylon material according to claim 1 or 2, wherein the preparation method of the synergistically modified PA66 comprises the steps of: (1) Mixing PA66 with phytic acid for reaction to obtain pre-modified PA66; (2) Adding diethylenetriamine pentaacetic acid into the pre-modified PA66 for reaction to obtain secondary modified PA66; (3) And adding octa (3-aminopropyl) silsesquioxane into the secondary modified PA66 for reaction, and then cooling and drying to obtain the synergistic modified PA66.
  4. 4. The flame-retardant reinforced nylon material according to claim 3, wherein the reaction condition in the step (1) is that the reaction is carried out for 20-40 min at a rotation speed of 300-500 rpm under a temperature of 60-80 ℃.
  5. 5. The flame-retardant reinforced nylon material according to claim 3, wherein the reaction condition in the step (2) is that the reaction is carried out for 30-60 min at a rotation speed of 300-500 rpm under the condition of 80-100 ℃.
  6. 6. The flame-retardant reinforced nylon material according to claim 3, wherein the reaction condition of the step (3) is that the reaction is carried out for 40-90 min at a rotation speed of 300-500 rpm under a condition of 100-120 ℃, and then the reaction is dried for 2-4 h under a condition of 80-100 ℃.
  7. 7. The flame-retardant reinforced nylon material of claim 1, wherein the flame retardant is formed by mixing (1-3) ammonium polyphosphate and diethyl aluminum phosphinate according to the mass ratio of (2-6), the reinforcing filler is formed by mixing (2-8) glass fiber and talcum powder according to the mass ratio of (1-4), the antioxidant is formed by mixing (1-3) antioxidant 1010 and antioxidant 168 according to the mass ratio of (1-2), and the lubricant is formed by mixing (1-4) ethylene bis stearamide and zinc stearate according to the mass ratio of (1-2).
  8. 8. The preparation method of the flame-retardant reinforced nylon material is characterized by comprising the following steps of: s1, mixing an organic micromolecular function regulator, a flame retardant, a reinforcing filler, an antioxidant and a lubricant according to a proportion to obtain an auxiliary agent mixture; S2, mixing the synergistically modified PA66 and the auxiliary agent mixture for melt blending to obtain a blended melt; and S3, extruding, cooling and granulating the blending melt to obtain the flame-retardant reinforced nylon material.
  9. 9. The preparation method of the flame-retardant reinforced nylon material according to claim 8, wherein the reaction condition of the step S1 is that stirring and mixing are carried out for 10-30 min at a rotating speed of 300-600 rpm under a normal temperature condition, and the reaction condition of the step S2 is that a double screw extruder is adopted for melt blending under a temperature of 220-260 ℃ and a screw rotating speed of 150-300 rpm.
  10. 10. The method for preparing the flame-retardant reinforced nylon material according to claim 8, wherein the reaction condition of the step S3 is that the extrudate is granulated after being cooled by water and dried for 2-4 hours at 80-100 ℃.

Description

Flame-retardant reinforced nylon material and preparation method thereof Technical Field The invention belongs to the technical field of high polymer materials, and particularly relates to a flame-retardant reinforced nylon material and a preparation method thereof. Background Nylon materials are an important engineering plastic, wherein PA66 has high crystallinity, excellent mechanical strength, wear resistance, heat resistance and good dimensional stability, and is widely applied to the fields of automobile parts, electronic and electric structural parts, mechanical equipment parts, industrial engineering materials and the like. PA66 is commonly used in the electronics and electrical and automotive industries, among other things, to manufacture connectors, harness jackets, switch components, and structural supports. However, PA66 contains a large amount of amide bonds in its molecular structure, and is easily thermally cracked and generates combustible gas under the action of high temperature or flame, so that the material has a certain combustibility, and a molten drop phenomenon is easily generated during combustion, thereby increasing the risk of fire. Therefore, in many application scenarios with high requirements on flame retardant properties, flame retardant modification of PA66 materials is necessary. Currently, common flame retardant nylon materials are generally realized by adding phosphorus, nitrogen or inorganic flame retardants, such as ammonium polyphosphate, phosphinate flame retardants and the like, to the PA 66. Although the flame retardant can improve the flame retardant property of the material to a certain extent, the continuous structure of the PA66 matrix is often damaged by simply adding the flame retardant, so that the mechanical property, toughness and processing property of the material are affected. In addition, the interface compatibility between the flame retardant and the nylon matrix is poor, and the problems of uneven dispersion or insufficient interface combination easily occur in the processing and using processes, thereby affecting the comprehensive performance of the material. In order to improve the problems, some researches are carried out to enhance the interfacial bonding capability by adding a coupling agent or carrying out surface treatment on a filler, but most of the prior art only stays at the level of physical dispersion or simple surface modification, and it is difficult to construct a stable synergistic structure at the level of a molecular structure, and a good balance between flame retardant efficiency and mechanical properties is still difficult to realize. Therefore, a flame-retardant reinforced nylon material which can carry out synergistic modification on a PA66 matrix structure and form a stable structure on a molecular level, thereby improving flame retardant property, mechanical property and interface compatibility simultaneously is developed, and has important research value and application prospect. Disclosure of Invention The invention aims to solve the problems of limited flame retardant efficiency, poor interface compatibility between a flame retardant and nylon Long Jiti and easy reduction of mechanical properties of materials in the prior art when a nylon material is modified by a single flame retardant. According to the invention, through carrying out synergistic structural modification on PA66, introducing phytic acid, diethylenetriamine pentaacetic acid and octa (3-aminopropyl) silsesquioxane under the action of amino at the chain end of the PA66 molecule, carrying out synergistic modification on PA66 through ion association, chelating coordination and silicon-oxygen cage structure limiting action, constructing synergistic modified PA66 with a stable structure, simultaneously introducing an organic micromolecular function regulator 2, 6-diaminoanthraquinone into a system, and combining with the combined action of a flame retardant, a reinforcing filler, an antioxidant and a lubricant, thereby obtaining the flame retardant reinforced nylon material. According to the invention, through carrying out ion association, chelating coordination and synergistic modification of the silicon-oxygen cage structure limit domain on the PA66, the flame retardant property of the material is obviously improved while the good mechanical property is maintained. The aim of the invention can be achieved by the following technical scheme: The flame-retardant reinforced nylon material comprises, by weight, 1-8 parts of a synergistic modified PA 6660-85 parts of an organic small molecule function regulator, 8-20 parts of a flame retardant, 5-25 parts of a reinforcing filler, 0.1-1 part of an antioxidant and 0.2-2 parts of a lubricant, wherein the synergistic modified PA66 is PA66 obtained by carrying out ion association, chelating coordination and silicon-oxygen cage structure limited domain synergistic modification on phytic acid, diethylenetriamine pentaacetic aci