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In-situ-polymerized halogen-free flame-retardant nylon 6/attapulgite nano composite material and preparation method thereof

A nanocomposite material and in-situ polymerization technology, which is applied in the field of in-situ polymerization of halogen-free flame retardant nylon 6/attapulgite nanocomposite materials and its preparation, can solve the problem of large amount of flame retardant, poor flame retardant effect, and the Large smoke volume and other problems, to achieve the effect of long flame retardant life, good flame retardant and smoke suppression, and reduce internal stress

Inactive Publication Date: 2015-03-25
JUNMA TIRE CORD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the existing technical difficulties such as large amount of flame retardant, poor flame retardant effect, large amount of smoke and high cost, and provide a synergistic flame retardant of attapulgite and organic flame retardant, with less amount of flame retardant Preparation method of halogen-free flame-retardant nylon 6 / attapulgite nanocomposite material with good flame-retardant effect and long flame-retardant life

Method used

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  • In-situ-polymerized halogen-free flame-retardant nylon 6/attapulgite nano composite material and preparation method thereof
  • In-situ-polymerized halogen-free flame-retardant nylon 6/attapulgite nano composite material and preparation method thereof
  • In-situ-polymerized halogen-free flame-retardant nylon 6/attapulgite nano composite material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1）

[0032] Step 1, preparation of modified attapulgite nanoparticles

[0033] 1 part by weight of deionized water and 5 parts by weight of nano-attapulgite are uniformly dispersed in 100 parts by weight of toluene, 4 parts by weight of aminopropyltrimethoxysilane are added, and ultrasonically dispersed for 1 hour to form a mixture; React at 50°C for 5 hours, then wash, dry and sieve to obtain modified attapulgite. The reaction equation is:

[0034]

[0035] Step 2, preparation of flame retardant salt

[0036] The preparation method of the halogen-free flame retardant is as follows: 10 parts by weight of 2-carboxyethylphenylphosphinic acid and 5 parts by weight of hexamethylenediamine are dissolved in N,N-dimethylformamide, and the water temperature is kept in a constant temperature water bath. React at 55°C for 3-5h, then cool, filter, and wash with absolute ethanol. The reaction equation is:

[0037]

[0038] Step 3, preparation of flame retardant composite material

...

Embodiment 2）

[0042] Step 1, preparation of modified attapulgite nanoparticles

[0043] 1 part by weight of deionized water and 5 parts by weight of nano-attapulgite are uniformly dispersed in 100 parts by weight of toluene, 4 parts by weight of aminopropyltriethoxysilane are added, and ultrasonically dispersed for 1 hour to form a mixture; the mixture is mechanically stirred React at a temperature of 50°C for 5 hours, then wash, dry and sieve to obtain modified attapulgite.

[0044] Step 2, preparation of flame retardant salt

[0045] The preparation method of the halogen-free flame retardant is as follows: 4 parts by weight of bis(p-carboxyphenyl)phenylphosphine oxide and 2 parts by weight of hexamethylenediamine are dissolved in N,N-dimethylformamide, and the constant temperature water bath Keep the water temperature at 55°C and react for 3-5h, then cool, filter, and wash with absolute ethanol.

[0046] Step 3, preparation of flame retardant composite material

[0047] 84 parts by wei...

Embodiment 3）

[0049] Step 1, preparation of modified attapulgite nanoparticles

[0050] 1 part by weight of deionized water and 5 parts by weight of nano-attapulgite are uniformly dispersed in 100 parts by weight of toluene, 4 parts by weight of anilinomethyltriethoxysilane are added, and ultrasonically dispersed for 1 h to form a mixture; the mixture is mechanically stirred React at a temperature of 50° C. for 5 hours, then wash, dry and sieve to obtain modified attapulgite.

[0051] Step 2, preparation of flame retardant salt

[0052] The preparation method of the halogen-free flame retardant is as follows: 15 parts by weight of 2-carboxyethylphenylphosphinic acid and 5 parts by weight of hexamethylenediamine are dissolved in N,N-dimethylformamide, and the water temperature is kept in a constant temperature water bath. React at 55°C for 3-5h, then cool, filter, and wash with absolute ethanol.

[0053] Step 3, preparation of flame retardant composite material

[0054] Add 90 parts by we...

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Abstract

The invention relates to a nylon 6 composite material, particularly an in-situ-polymerized halogen-free flame-retardant nylon 6 / attapulgite nano composite material and a preparation method thereof. The preparation method comprises the following step: carrying out in-situ polymerization on modified attapulgite, halogen-free flame retardant salt and caprolactam until the attapulgite forms a uniform solution in the caprolactam melt, thereby obtaining the halogen-free flame-retardant nylon 6 / attapulgite nano composite material. The attapulgite can be uniformly dispersed in the nylon 6 base. The composite material has the advantages of high oxygen barrier efficiency, low flame retardant consumption, low cost, high flame-retardant efficiency, high mechanical properties and the like, does not generate any toxic or harmful gas after being combusted, does not pollute the environment, and can be used for flame-retardant spinning or as an engineering plastic.

Description

technical field [0001] The invention relates to a nylon 6 composite material, in particular to a halogen-free flame-retardant nylon 6 / attapulgite nanocomposite material by in-situ polymerization and a preparation method thereof. Background technique [0002] Attapulgite is a mineral rich in magnesium and aluminum, and its crystal theoretical chemical formula is (Mg, Al, Fe) 5 Si 8 o 20 (OH) 2 (OH 2 )·4H 2 O. Attapulgite has a chain-layer structure of 2:1, and its crystals are needle-like and fibrous aggregates. The diameter of a single fiber crystal is about 20nm, and the length can reach 1um. The chain-layer structure is different from that of attapulgite. Such a layered silicate, this special structure endows attapulgite with unique physical and chemical properties such as adsorption, colloid, filling and salt resistance. Adding a small amount of attapulgite to the polymer has a good reinforcing effect, and the addition of attapulgite in the literature "attapulgite ...

Claims

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Application Information

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IPC IPC(8): C08G69/42C08K9/06C08K3/34
Inventor 顾晓华吴奎薛芳峰
Owner JUNMA TIRE CORD
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