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Halogen-free flame-retardant polyamide resin composition and preparation method thereof

A technology for flame-retardant polyamide and resin composition, which is applied in the field of halogen-free flame-retardant polyamide resin composition and its preparation, can solve the problem of low mechanical properties of the polyamide resin composition, large amount of inorganic flame retardant added, and adverse effects. problems such as the life of electrical products, to achieve the effect of reducing the effective melt viscosity, reducing the processing temperature, and improving the yield strength

Active Publication Date: 2018-09-21
GUANGDONG GREAT MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For polyamide barriers using red phosphorus or other inorganic fillers (such as magnesium hydroxide, hydrotalcite, etc.), the use of red phosphorus will produce toxic substances such as phosphine during processing, and the corrosion of electrical products will affect the use. The life of electrical products, and the addition of large amounts of inorganic flame retardants and difficult processing will result in poor mechanical properties of the polyamide resin composition
In the prior art, glass fiber-reinforced polyamide compositions are generally used. Generally, the amount of glass fiber added should reach more than 30%. The glass fiber usually floats on the surface of the product during molding and affects the appearance. In addition, when adding glass fiber reinforced materials, usually The glass fiber will form orientation during combined injection molding, which will cause the polyamide composition to warp, and the dimensional stability is very worrying

Method used

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  • Halogen-free flame-retardant polyamide resin composition and preparation method thereof
  • Halogen-free flame-retardant polyamide resin composition and preparation method thereof
  • Halogen-free flame-retardant polyamide resin composition and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A halogen-free flame-retardant polyamide resin composition prepared from the following raw materials:

[0043]

[0044] Wherein, the hyperbranched polymer is an amino-terminated hyperbranched polyamide.

[0045] The polyamide is a PA6 / PA66 / PA6T ternary copolymerization material, and the PA6 / PA66 / PA6T ternary copolymerization material is prepared by melt copolymerization of caprolactam, hexamethylene adipate and hexamethylene p-benzoamide, wherein The mass ratio of caprolactam, hexamethylene adipate and hexamethylene p-benzoyl is 5:2:1.

[0046] The carbon fiber tube is a modified multi-wall carbon fiber tube, the diameter of the multi-wall carbon fiber tube is 15-40nm, and the length is 0.2-2μm. The specific modification step is: after passivating the multi-wall carbon fiber tube with concentrated sulfuric acid, The taurine is grafted onto the surface of the multi-wall carbon fiber tube under gamma ray irradiation to obtain the modified multi-wall carbon fiber tube....

Embodiment 2

[0063] A halogen-free flame-retardant polyamide resin composition prepared from the following raw materials:

[0064]

[0065]

[0066] Wherein, the hyperbranched polymer is an amino-terminated hyperbranched polyamide.

[0067] The polyamide is a PA6 / PA66 / PA6T ternary copolymerization material, and the PA6 / PA66 / PA6T ternary copolymerization material is prepared by melt copolymerization of caprolactam, hexamethylene adipate and hexamethylene p-benzoamide, wherein The mass ratio of caprolactam, hexamethylene adipate and hexamethylene p-benzoyl is 7:4:1.

[0068] The carbon fiber tube is a modified multi-wall carbon fiber tube, the diameter of the multi-wall carbon fiber tube is 15-40nm, and the length is 0.2-2μm. The specific modification step is: after passivating the multi-wall carbon fiber tube with concentrated sulfuric acid, The taurine is grafted onto the surface of the multi-wall carbon fiber tube under gamma ray irradiation to obtain the modified multi-wall carbon...

Embodiment 3

[0085] A halogen-free flame-retardant polyamide resin composition prepared from the following raw materials:

[0086]

[0087] Wherein, the hyperbranched polymer is an amino-terminated hyperbranched polyamide.

[0088] The polyamide is a PA6 / PA66 / PA6T ternary copolymerization material, and the PA6 / PA66 / PA6T ternary copolymerization material is prepared by melt copolymerization of caprolactam, hexamethylene adipate and hexamethylene p-benzoamide, wherein The mass ratio of caprolactam, hexamethylene adipate and hexamethylene p-benzoyl is 6:3:1.

[0089] The carbon fiber tube is a modified multi-wall carbon fiber tube, the diameter of the multi-wall carbon fiber tube is 15-40nm, and the length is 0.2-2μm. The specific modification step is: after passivating the multi-wall carbon fiber tube with concentrated sulfuric acid, The taurine is grafted onto the surface of the multi-wall carbon fiber tube under gamma ray irradiation to obtain the modified multi-wall carbon fiber tube....

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Abstract

The invention relates to the technical field of polymer materials, in particular to a halogen-free flame-retardant polyamide resin composition and a preparation method thereof. The composition is prepared from polyamide, hyperbranched polymer, carbon fiber tube, antioxygen, surface modifier, thixotropic agent, non-halogen flame-retardant and flame retardant synergist, wherein the hyperbranched polymer is amino-end-group hyperbranched polyamide. The polyamide is adopted as a resin substrate and cooperates with a certain amount of the hyperbranched polymer, the carbon fiber tube, the surface modifier, the non-halogen flame-retardant, the flame retardant synergist and the thixotropic agent, the carbon fiber tube, the non-halogen flame-retardant and the flame retardant synergist are uniformlydispersed in the polyamide, the prepared halogen-free flame-retardant polyamide resin composition has the advantages of being high in strength, good in dimensional stability, good in chemical resistance and excellent in electrical properties, outstanding physical performance can be maintained under severer temperature and humidity conditions, and the composition has high flame retardant performance which reaches UL94V0.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a halogen-free flame-retardant polyamide resin composition and a preparation method thereof. Background technique [0002] Polyamide resin has excellent mechanical strength, heat resistance, chemical resistance, wear resistance and self-lubrication, and low friction coefficient, and its wide application fields include electronic appliances, auto parts, furniture, building materials and fibers, and has been Become one of the most important engineering plastics. [0003] Generally, the flame retardant additives used in the existing polyamide compositions are mostly brominated flame retardants, which are banned by many countries because they are harmful to the environment. The present invention is a halogen-free flame retardant polyamide resin Composition, environmental protection and non-toxic. For polyamide barriers using red phosphorus or other inorganic fillers (such...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/00C08L87/00C08K13/06C08K9/02C08K9/04C08K7/24C08K7/06C08K5/523C08K5/3492C08K3/36
CPCC08L77/00C08L2201/02C08L2201/08C08L87/00C08K13/06C08K9/02C08K9/04C08K7/24C08K7/06C08K5/523C08K5/34928C08K3/36
Inventor 龙志雄黄兆柱
Owner GUANGDONG GREAT MATERIAL CO LTD
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