Method of nano halogen-free flame retardant polyamide-6

A technology for flame retardant polyamide and polyamide, which is applied in the field of materials and can solve the problems of low flame retardant efficiency of magnesium hydroxide, very large addition amount, and impact on mechanical properties.

Inactive Publication Date: 2015-01-21
SHANGHAI NAT ENG RES CENT FORNANOTECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The above three flame retardant methods can all achieve the purpose of halogen-free flame retardant polyamide-6. At the micron level, the particle size is too large, and the compatibility with polymer materials is not good enough. The use of its flame-retardant pol

Method used

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  • Method of nano halogen-free flame retardant polyamide-6

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Comparison scheme
Effect test

Embodiment 1

[0014] First, weigh 100 parts by weight of polyamide-6 raw materials, 5 parts by weight of nano MCA halogen-free flame retardant, and 0.1 parts by weight of antioxidants, and mix these materials uniformly. Then preheat the twin-screw extruder to 240°C, add the uniformly mixed raw materials into the twin-screw extruder, control the screw speed to 200r / min, and pellet the product to obtain halogen-free nano flame-retardant polyamide-6 .

Embodiment 2

[0016] First, weigh 100 parts by weight of polyamide-6 raw materials, 7 parts by weight of nano MCA halogen-free flame retardant, and 0.2 parts by weight of antioxidants, and mix these materials uniformly. Then preheat the twin-screw extruder to 230°C, add the uniformly mixed raw materials into the twin-screw extruder, control the screw speed to 130r / min, and pellet the product to obtain halogen-free nano flame-retardant polyamide-6 .

Embodiment 3

[0018] First, weigh 100 parts by weight of polyamide-6 raw materials, 10 parts by weight of nano MCA halogen-free flame retardant, and 0.5 parts by weight of antioxidants, and mix these materials uniformly. Then preheat the twin-screw extruder to 220°C, add the uniformly mixed raw materials into the twin-screw extruder, control the screw speed to 250r / min, and pellet the product to obtain halogen-free nano flame-retardant polyamide-6 .

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Abstract

The invention relates to a preparation method of nano halogen-free flame retardant polyamide-6. The preparation method comprises the steps: firstly weighing polyamide-6, nano MCA halogen-free flame retardant agent and an antioxidant, and mixing uniformly the raw materials; and then preheating a double-screw extruder to the temperature of 185-280 DEG C, adding the uniformly-mixed raw materials into the double-screw extruder, and then carrying out granulation on the product, to obtain the nano halogen-free flame retardant polyamide-6. The prepared nano halogen-free flame retardant PA 6 has the advantages of good flame retardant effect, less adding amount of the flame retardant agent, small combustion smoke formation quantity, and no production of toxic and corrosive gases, and has mechanical properties higher than those of a common halogen-free flame retardant PA6 in markets.

Description

Technical field [0001] The invention belongs to the technical field of materials, and specifically relates to a preparation method of nanometer, halogen-free flame-retardant polyamide-6 (nylon 6). Background technique [0002] Polyamide-6 (PA6) is an important engineering plastic, which has been widely used in the fields of electronic appliances, automobiles and machinery. However, the phenomenon of melting and melting of polyamide-6 during the combustion process is more obvious. Low strength, easy to produce a large number of flaming drops. In the event of a fire, it emits a lot of heat and can easily cause secondary combustion. Therefore, in the use of production and life, PA6 needs to be flame-retardant treatment. [0003] Currently commonly used polyamide-6 flame retardants mainly include metal hydroxides, phosphorus-nitrogen flame retardants and nitrogen flame retardants. Metal hydroxide is an environmentally friendly flame retardant, which is widely used due to its abundan...

Claims

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Application Information

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IPC IPC(8): C08L77/02C08K7/00C08K5/3492
CPCC08K5/34928C08K2201/002C08K2201/004C08K2201/011C08L2201/02C08L2201/22C08L77/02
Inventor 何丹农徐少洪陈超张春明金彩虹
Owner SHANGHAI NAT ENG RES CENT FORNANOTECH
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