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Low-water-absorption and flame-retarding nylon 66 composition and preparation method thereof

A technology of flame retardant nylon and low water absorption, applied in the field of low water absorption flame retardant nylon 66 composition and its preparation, to achieve good flame retardancy, dimensional stability, and high barrier properties

Inactive Publication Date: 2017-11-14
GUANGDONG ALDEX NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These defects of flame-retardant nylon 66 with low water absorption have led to limitations in its application, such as precision electronic parts made of flame-retardant PPO, water pump electrical boxes, etc.

Method used

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  • Low-water-absorption and flame-retarding nylon 66 composition and preparation method thereof
  • Low-water-absorption and flame-retarding nylon 66 composition and preparation method thereof
  • Low-water-absorption and flame-retarding nylon 66 composition and preparation method thereof

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preparation example Construction

[0041] The preparation method of above-mentioned a kind of low water-absorbing flame-retardant nylon 66 composition, comprises the following steps:

[0042]1) weighing each component except the glass fiber in proportion, stirring and mixing to obtain a premix;

[0043] 2) Add the premixed material to the main feeding port of the twin-screw extruder, add glass fiber from the side feeding port, extrude, and granulate to obtain a low water absorption flame-retardant nylon 66 composition.

[0044] Preferably, the twin-screw extruder is a toothed co-rotating parallel twin-screw extruder with an aspect ratio ≥ 32:1; the temperature range of each zone of the twin-screw extruder is 245°C to 305°C; further preferably, the twin-screw extruder The aspect ratio of the screw extruder is (36-40):1.

Embodiment 1

[0047] The following raw materials are used:

[0048]

[0049] Put the components other than the glass fiber into the high-speed mixer according to the weight percentage, and stir for 2-5 minutes at room temperature and 60 rpm to prepare the premix; select the tooth with an aspect ratio of 36:1 Joint-type co-rotating parallel twin-screw extruder, the temperature range of each zone is 245-305°C, the premixed material is fed into the extruder through the main feed port of the twin-screw extruder, and the glass fiber is extruded through the twin-screw extruder at the same time The side feeding port of the extruder is fed into the extruder, and the low water absorption and flame retardant nylon 66 composition is obtained through drawing, water cooling, dehumidification, and pelletizing.

Embodiment 2

[0051] The following raw materials are used:

[0052]

[0053] Put the components other than the glass fiber into the high-speed mixer according to the weight percentage, and stir for 2-5 minutes at room temperature and 60 rpm to prepare the premix; select the tooth with an aspect ratio of 36:1 Joint-type co-rotating parallel twin-screw extruder, the temperature range of each zone is 245-305°C, the premixed material is fed into the extruder through the main feed port of the twin-screw extruder, and the glass fiber is extruded through the twin-screw extruder at the same time The side feeding port of the extruder is fed into the extruder, and the low water absorption and flame retardant nylon 66 composition is obtained through drawing, water cooling, dehumidification, and pelletizing.

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Abstract

The invention discloses a low-water-absorption and flame-retarding nylon 66 composition and a preparation method thereof. The low-water-absorption and flame-retarding nylon 66 composition is prepared from the following components in percentage by mass: nylon 66, polyketone, a low-water-absorption agent, a flame retardant, a flame retarding synergist, an antioxidant and a glass fiber. Meanwhile, the invention also discloses the preparation method of the low-water-absorption and flame-retarding nylon 66 composition. The low-water-absorption and flame-retarding nylon 66 composition prepared by the preparation method provided by the invention has an extremely low water absorption rate which is not more than 0.1 percent, has a high barrier property to water vapor, and keeps the characteristics of dimensional stableness, favorable flame retardancy, high rigidity and high toughness for a long time. The low-water-absorption and flame-retarding nylon 66 composition belongs to a flame-regarding nylon 66 composition which keeps a dry state for a long time; the field of the application of flame-retarding nylon 66 can be extended through the excellent comprehensive performance of the low-water-absorption and flame-retarding nylon 66 composition.

Description

technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to a low water-absorbing flame-retardant nylon 66 composition and a preparation method thereof. Background technique [0002] Nylon 66 is one of the earliest synthetically developed and relatively cheap varieties of polyamide resins. It has the characteristics of light weight, high mechanical strength and easy molding and processing. It also has excellent comprehensive properties such as wear resistance, oil resistance, self-lubrication and corrosion resistance. , has been well applied in many industries. Water molecules are easier to pass through nylon 66 molecules and form hydrogen bonds with nylon 66 molecules, resulting in reduced mechanical strength and dimensional stability. It is a very important research topic to make nylon 66 into a low water absorption flame retardant material by adding reinforcing materials, flame retardants, functional additives, alloying an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/06C08L73/00C08L23/08C08L83/10C08K13/04C08K7/14C08K5/03C08K3/22C08K3/38C08K5/134C08K5/526
CPCC08L77/06C08K2003/387C08K2201/003C08L2201/02C08L2201/14C08L2205/035C08L73/00C08L23/0869C08L83/10C08K13/04C08K7/14C08K5/03C08K3/2279C08K3/38C08K5/1345C08K5/526
Inventor 易庆锋朱保成王灿耀于海鸥桑杰
Owner GUANGDONG ALDEX NEW MATERIAL CO LTD
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