Carbon fiber-reinforced halogen-free flame-retardant PA66 composite and preparation method thereof

A technology of PA66 and composite materials, which is applied in the field of carbon fiber-reinforced phosphorus-based flame-retardant PA66 composite materials and its preparation, can solve the problems of unsuitable reinforced materials, decreased heat resistance temperature and surface properties, and large performance damage. Excellent comprehensive performance, high tensile strength and high mechanical strength

Inactive Publication Date: 2017-07-04
HEILONGJIANG XINDA ENTERPRISE GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In terms of antistatic modification, adding a low molecular weight antistatic agent is the most common antistatic measure. This modified material mainly uses the moisture absorbed by the antistatic agent on the surface of the material to reduce the surface resistivity, so it has poor durability and is not washable. It is highly dependent on environmental humidity. Some foreign scholars compound a certain amount of metal salt sol in polymers containing ether bonds. The metal ions cooperate with the ether bonds of polyether blocks to form an ion-conductive network inside and improve the conductivity. rate, to enhance the conductivity of the polymer, these two methods have different degrees of decline in the heat-resistant temperature and surface properties of the material, and are not suitable for reinforced materials
However, polymers modified by carbon black and metal fillers can obtain relatively good permanent antistatic properties, but they are often added in large amounts, resulting in large performance damage and difficult processing.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] This embodiment relates to a method for preparing a carbon fiber reinforced phosphorus-based flame-retardant PA66 composite material, comprising the following steps:

[0039] Step 1, prepare materials according to the components and contents in Table 1:

[0040] in:

[0041] PA66 is Jiangsu Shenma EPR2700;

[0042] The phosphorus-based flame retardant is a nitrogen-phosphorus-based composite flame retardant compounded by diethyl hypophosphite and melamine cyanurate at a ratio of 5:1, wherein the phosphorus content is ≥ 30%, the nitrogen content is ≥ 5%, and the phosphorus content is ≥ 5%. The ratio of nitrogen content is 4:1;

[0043] Carbon fiber is polyacrylonitrile-based carbon fiber, and its tensile strength is >500kg / mm 3 , tensile modulus > 250G.Pa;

[0044] The graft type toughening modifier is ethylene-methyl acrylate-glycidyl methacrylate random terpolymer, preferably AX8900 from Akema Company;

[0045] The antioxidant is antioxidant 245;

[0046] The lub...

Embodiment 2

[0049] PA66 is Jiangsu Shenma EPR2700;

[0050] This embodiment relates to a method for preparing a carbon fiber reinforced phosphorus-based flame-retardant PA66 composite material, comprising the following steps:

[0051] Step 1, prepare materials according to the components and contents in Table 1:

[0052] in:

[0053] The phosphorus-based flame retardant is a nitrogen-phosphorus-based composite flame retardant compounded by ethyl hypophosphite and melamine pyrophosphate at a ratio of 6:1, wherein the phosphorus content is ≥30%, the nitrogen content is ≥5%, and the phosphorus-nitrogen content The ratio is 4:1;

[0054] Carbon fiber is polyacrylonitrile-based carbon fiber, and its tensile strength is >500kg / mm 3 , tensile modulus > 250G.Pa;

[0055] The graft type toughening modifier is ethylene-methyl acrylate-glycidyl methacrylate random terpolymer, preferably AX8900 from Akema Company;

[0056] The antioxidant is antioxidant 245;

[0057] The lubricating and dispers...

Embodiment 3

[0060] PA66 is Jiangsu Shenma EPR2700;

[0061] This embodiment relates to a method for preparing a carbon fiber reinforced phosphorus-based flame-retardant PA66 composite material, comprising the following steps:

[0062] Step 1, prepare materials according to the components and contents in Table 1:

[0063] in:

[0064] The phosphorus-based flame retardant is a nitrogen-phosphorus-based composite flame retardant compounded by ethyl butyl hypophosphite and ammonium phosphate at a ratio of 6:1, in which the phosphorus content is ≥30%, the nitrogen content is ≥5%, and the phosphorus and nitrogen content The ratio is 4:1;

[0065] Carbon fiber is polyacrylonitrile-based carbon fiber, and its tensile strength is >500kg / mm 3 , tensile modulus > 250G.Pa;

[0066] The graft type toughening modifier is ethylene-methyl acrylate-glycidyl methacrylate random terpolymer, preferably AX8900 from Akema Company;

[0067] The antioxidant is antioxidant 245;

[0068] The lubricating and di...

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Abstract

The invention relates to a carbon fiber-reinforced halogen-free flame-retardant PA66 composite and a preparation method thereof. The composite comprises, by weight, 52.1 to 68.1% of PA66, 15 to 20% of a halogen-free fire retardant, 10 to 30% of carbon fibers, 2 to 4% of a grafting type toughening modifier, 0.4% of an anti-oxidant and 0.5% of a lubrication dispersing agent. The invention also relates to a preparation method for the carbon fiber-reinforced halogen-free flame-retardant PA66 composite. The PA66 composite provided by the invention is developed to meet special requirements of electric appliance products on antistatic performance and flame resistance of electromagnetic-shielding materials. Compared with the prior art, the PA66 composite provided by the invention has the advantages of high mechanical strength, surface resistance of 10<-2> to 10<6> omega, electromagnetic shielding performance, no halogen, environmental protection, flame-retardation performance reaching the level UL-94V0, good appearance and excellent comprehensive properties, and is especially applicable to thin-wall products with high requirements on precision.

Description

technical field [0001] The invention relates to a nylon composite material, in particular to a carbon fiber-reinforced phosphorus-based flame-retardant PA66 composite material and a preparation method thereof. Background technique [0002] PA66 has good mechanical strength and good fluidity, and is especially suitable for applications on thin-walled parts. For the flame-retardant modification of fiber-reinforced PA66, the traditional bromine-antimony system has high flame-retardant efficiency and good performance retention rate, but it is easy to cause secondary pollution and is gradually eliminated. The concept of modern human beings' environmental protection is getting stronger and stronger, and phosphorus-based flame retardants are the general trend. Although the red phosphorus flame retardant has good efficiency, it may cause the risk of corrosion damage to the parts due to the precipitation of the flame retardant. The foreign phosphorus flame retardant has good compreh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/02C08L23/08C08L83/04C08K13/06C08K9/00C08K7/06C08K5/5313C08K5/3492C08K5/134C08K3/32
CPCC08L77/02C08K2201/014C08L2201/02C08L2201/04C08L2203/20C08L2205/03
Inventor 马海清刘刚林航
Owner HEILONGJIANG XINDA ENTERPRISE GRP
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