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Flame-retardant nylon 66 copolymer material and preparation method therefor

A flame-retardant nylon and copolymer technology, applied in the field of flame-retardant nylon synthesis, can solve the problems of limiting the use range of high polymers, the decrease of polymer molecular weight, and the impact on the polymerization process, so as to achieve little impact on mechanical properties, easy spinning, Flame retardant effect Long-lasting effect

Inactive Publication Date: 2015-12-16
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the flame retardant modification of copolymerization can achieve better flame retardant effect, the introduction of flame retardant will inevitably affect the polymerization process of polymer materials, which will reduce the molecular weight of the polymer, thereby affecting its mechanical properties.
In addition, reactive flame retardants are usually randomly distributed in the polymer matrix. For random copolymers, as the concentration of non-crystalline comonomers (flame retardants) increases, the melting point decreases monotonically, that is, with As the content of flame retardant increases, the melting point of the polymer matrix gradually decreases, thus limiting the scope of use of polymers

Method used

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  • Flame-retardant nylon 66 copolymer material and preparation method therefor
  • Flame-retardant nylon 66 copolymer material and preparation method therefor
  • Flame-retardant nylon 66 copolymer material and preparation method therefor

Examples

Experimental program
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Effect test

Embodiment 1

[0035] A preparation method of a flame-retardant nylon 66 copolymer material, specifically comprising the following steps:

[0036] (1) Mix the flame retardant DDP, hexamethylenediamine and water, mix evenly at 50°C for 2 hours under the protection of nitrogen, then stir and react at 90°C for 2 hours, then raise the temperature to 150°C for further polymerization, and finally decompress and vacuumize, and react Finish generating flame retardant prepolymer, it is viscous liquid, number average molecular weight Mn is 1.8×103 , the molar ratio of flame retardant DDP, hexamethylenediamine and water is 1:1.1:2, and the two ends of the obtained flame retardant prepolymer are active end groups of a carboxyl group and an amine group respectively;

[0037] The structure of the flame retardant is:

[0038]

[0039] (2) 90 parts by mass of 66 salt and 1 part by mass of adipic acid are made into a 60% aqueous solution, mixed evenly and added to the autoclave, and first fed with N 2 Ex...

Embodiment 2

[0046] A preparation method of a flame-retardant nylon 66 copolymer material, specifically comprising the following steps:

[0047] (1) Mix the flame retardant CEPPA, hexamethylenediamine and water, mix evenly at 80°C for 3 hours under the protection of nitrogen, then stir and react at 130°C for 3 hours, then raise the temperature to 180°C for further polymerization, and finally decompress and vacuumize, react Finish generating flame retardant prepolymer, it is semi-solid, number average molecular weight Mn is 2.5 * 10 3 , the molar ratio of flame retardant CEPPA, hexamethylenediamine and water is 1:1.2:2.5, and the two ends of the obtained flame retardant prepolymer are respectively a carboxyl group and an amine active end group;

[0048] The structure of the flame retardant is:

[0049]

[0050] (2) 96.8 parts by mass of 66 salt and 0.2 parts by mass of adipic acid are made into an 80% aqueous solution, mixed evenly and added to the autoclave, and first passed into N 2 ...

Embodiment 3

[0057] A preparation method of a flame-retardant nylon 66 copolymer material, specifically comprising the following steps:

[0058] (1) Mix the flame retardant BCPPO, hexamethylenediamine and water, mix evenly at 60°C for 2.5 hours under the protection of nitrogen, then stir and react at 95°C for 2 hours, then raise the temperature to 160°C for further polymerization, and finally vacuumize under reduced pressure, At the end of the reaction, a flame retardant prepolymer is generated, which is a viscous liquid with a number average molecular weight Mn of 2.8×10 3 , the molar ratio of flame retardant BCPPO, hexamethylenediamine and water is 1:1.2:2.1, and the two ends of the obtained flame retardant prepolymer are respectively a carboxyl group and an amine active end group;

[0059] The structure of the flame retardant is:

[0060]

[0061] (2) 91.8 parts by mass of 66 salts and 0.2 parts by mass of adipic acid are made into a 66% aqueous solution, mixed evenly and added to t...

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Abstract

The invention relates to a flame-retardant nylon 66 copolymer material and a preparation method therefor and particularly relates to a block flame-retardant nylon 66 copolymer material obtained through polymerization reaction of a phosphoric reactive flame retardant and a preparation method therefor. The method is characterized by comprising the steps of firstly enabling the flame retardant to react with diamine or dibasic alcohol so as to obtain a flame retardant prepolymer, and then, enabling the flame retardant prepolymer to react with a prepolymer of nylon 66, thereby obtaining the flame-retardant nylon 66 copolymer material. The flame-retardant nylon 66 copolymer material prepared by the method has the advantages of low flame retardant addition level, excellent mechanical properties, good flame retardant durability and the like, the vertical firing test can reach UL94V-0, and the limiting oxygen index is over 32%. The flame-retardant nylon 66 copolymer material not only can be subjected to injection molding directly or form films, but also can be prepared into flame-retardant fibers through melt spinning so as to be applied to the fields of clothing, fabrics and the like.

Description

technical field [0001] The invention belongs to the technical field of flame-retardant nylon synthesis, and relates to a flame-retardant nylon 66 copolymer material and a preparation method thereof, in particular to a phosphorus-containing reactive flame retardant prepolymer block flame-retardant nylon 66 copolymer material and its preparation method. Background technique [0002] Nylon 66 is one of the most widely used varieties in engineering plastics. It has excellent wear resistance, self-lubrication and chemical corrosion resistance. However, the limiting oxygen index of nylon 66 is only 21-23%, and its flame retardancy is poor. Seriously limit its application in various industries, so improving the flame retardancy of nylon 66 has important practical significance. [0003] At present, there are three main flame retardant modification methods for nylon 66: first, the fabric finishing method, which has poor flame retardant durability and will affect the feel of the fabr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G69/42
Inventor 肖茹李圆圆刘可陶磊贾凌云王华平
Owner DONGHUA UNIV
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