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Novel anti-precipitation flame retardant PA6 composite material and preparation method thereof

A composite material and anti-precipitation technology, applied in the field of polymer materials, can solve the problems of reducing the mechanical properties of PA6, the migration of flame retardants, and the high cost, and achieve the effects of improving mechanical properties, reducing the amount of precipitation, and low cost.

Inactive Publication Date: 2019-11-05
横店集团得邦工程塑料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, most of the current nitrogen-phosphorus flame retardants are small molecules and have poor compatibility with PA6, which can easily cause the flame retardants to migrate to the surface of the product and accumulate inside the matrix, affecting the appearance and flame retardant performance of the product
[0004] Chinese patent application CN201710266329.6 discloses an environmentally friendly flame-retardant PA6 material. The material uses pentaerythritol phosphate melamine salt, melamine cyanurate and aluminum hypophosphite as flame retardants, which effectively improves the flame-retardant grade of PA6 and reduces The molten droplets in the combustion process of PA6 can be suppressed, but it cannot inhibit the precipitation of flame retardants, and the impact strength of the material is low
[0005] Chinese patent application CN201710957259.9 inserts an organic medium between zirconium phosphate layers, and then ball mills to obtain α-zirconium phosphate sheets, and then adds α-zirconium phosphate sheets during the synthesis of melamine cyanuric acid (MCA) to obtain α-zirconium phosphate Modified MCA improves the compatibility with PA6, but its flame retardant preparation method is complex, high energy consumption, high cost, and difficult to industrial production
[0006] Literature (Polymer Materials Science and Engineering 2004 (03): 220-223) introduces a modifier WEX with flame retardant function into the molecular structure of MCA, which reduces the melting point of MCA, realizes the uniform dispersion of MCA in PA6, and improves The flame retardant properties of PA6 are improved, but this system cannot inhibit the precipitation of flame retardants, and the addition of flame retardants reduces the mechanical properties of PA6

Method used

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  • Novel anti-precipitation flame retardant PA6 composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Stir 98wt% of PA6 particles, 1wt% of melamine and 1wt% of phytic acid in a high-speed mixer for 10 minutes at a stirring speed of 2500r / min;

[0034] (2) Put the mixture of PA6 particles and flame retardant in step (1) in a vacuum drying oven at 80°C for 24 hours;

[0035] (3) The PA6 particles and flame retardant dried in step (2) are extruded in a twin-screw extruder and pelletized. The twin-screw parameters are as follows: the temperature in the first zone is 210±10℃, and the temperature in the second zone is 230± 10℃, three zone temperature is 245±10℃, four zone temperature is 245±10℃, five zone temperature is 230±10℃, head temperature is 220±10℃, twin screw speed is 80r / min, feeder The speed is 6r / min, and the speed of the pelletizer is 300r / min;

[0036] (4) The particles obtained from the granulation in step (3) are injection molded into PA6 splines by a single screw injection molding machine. The temperature of each section of the injection molding machine is 210±...

Embodiment 2

[0038] (1) Stir 96wt% PA6 particles, 1wt% MPP and 3wt% aminotrimethylene phosphoric acid in a high-speed mixer for 10 minutes at a stirring speed of 2500r / min;

[0039] (2) Put the mixture of PA6 particles and flame retardant in step (1) in a vacuum drying oven at 80°C for 24 hours;

[0040] (3) Extrude the PA6 particle and flame retardant mixture dried in step (2) in a twin-screw extruder and pelletize. The twin-screw parameters are the temperature of the first zone is 210±10℃, and the temperature of the second zone is 230 ±10℃, three zone temperature is 245±10℃, four zone temperature is 245±10℃, five zone temperature is 230±10℃, head temperature is 220±10℃, twin screw speed is 80r / min, feeding The speed of the machine is 6r / min, and the speed of the pelletizer is 300r / min;

[0041] (4) The particles obtained from the granulation in step (3) are injection molded into PA6 splines by a single screw injection molding machine. The temperature of each section of the injection molding ma...

Embodiment 3

[0043] (1) Stir 94wt% PA6 particles, 1wt% ammonium acetate and 5wt% ethylenediamine tetramethylene phosphonic acid in a high-speed mixer for 10 minutes at a stirring speed of 2500r / min;

[0044] (2) Put the mixture of PA6 particles and flame retardant in step (1) in a vacuum drying oven at 80°C for 24 hours;

[0045] (3) Extrude the PA6 particle and flame retardant mixture dried in step (2) in a twin-screw extruder and pelletize. The twin-screw parameters are the temperature of the first zone is 210±10℃, and the temperature of the second zone is 230 ±10℃, three zone temperature is 245±10℃, four zone temperature is 245±10℃, five zone temperature is 230±10℃, head temperature is 220±10℃, twin screw speed is 80r / min, feeding The speed of the machine is 6r / min, and the speed of the pelletizer is 300r / min;

[0046] (4) The particles obtained from the granulation in step (3) are injection molded into PA6 splines by a single screw injection molding machine. The temperature of each section o...

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Abstract

The invention relates to the field of high-molecular materials, and discloses a novel anti-precipitation flame retardant PA6 composite material and a preparation method thereof. The novel anti-precipitation flame retardant PA6 composite material of the invention comprises PA6, an amino group-containing flame retardant and a phosphate radical-containing flame retardant, wherein the PA6 accounts for90-96% of the total mass of the composite material. The simultaneous reaction of phosphate groups having a flame retarding effect with amino groups in the PA6 and the flame retardant is utilized to carry out reactive compatibilization, so the compatibility of the flame retardant with the PA6 is improved, the uniform dispersion of the flame retardant in a matrix is promoted, and the emigration ofthe flame retardant is inhibited. The compatibility of the flame retardant with the PA6 matrix is good, so the mechanical properties of the product are improved to a certain extent. The vertical burning level of the PA composite material can reach V-0 level by only adding the flame retardant accounting 10% of the mass of the material, and the composite material can be formed at one time, so the cost is low.

Description

Technical field [0001] The invention relates to the field of polymer materials, in particular to a novel anti-precipitation flame-retardant PA6 composite material and a preparation method thereof. Background technique [0002] As an important engineering plastic, nylon 6 (PA6) has excellent mechanical properties, wear resistance and corrosion resistance, and can be widely used in electronic appliances, automobile casings, aerospace and other fields. However, these fields require materials with excellent flame-retardant properties, and PA6 is a combustible material. The fire spreads quickly and emits a lot of dense smoke during combustion, which is extremely harmful. [0003] Adding flame retardants can effectively improve the flame retardant properties of polymer materials and protect personal and property safety. At present, with the improvement of social environmental protection awareness, halogen-based flame retardants are gradually being eliminated from the market. Nitrogen an...

Claims

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Application Information

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IPC IPC(8): C08L77/02C08K5/3492C08K5/521C08K5/098C08K5/5353
CPCC08K5/098C08K5/34922C08K5/34928C08K5/521C08K5/5353C08L2201/02C08L77/02
Inventor 卢津强马彪周立辉张天浩车仕君
Owner 横店集团得邦工程塑料有限公司
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