Organic phosphorus flame-retardant copolymer nylon and preparation method thereof

A technology of copolymerizing nylon and organophosphorus, which is applied in the fields of organophosphorus flame retardant copolymer nylon and its preparation, flame retardant copolymer nylon and its preparation, and achieves the effect of controllable viscosity

Inactive Publication Date: 2021-06-01
CHENGDU TALY TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the relative viscosity of the prepared polyamide material is only 0.78-0.82, and there is still a lot of room for improvement in the mechanical properties and other properties of the material samples

Method used

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  • Organic phosphorus flame-retardant copolymer nylon and preparation method thereof
  • Organic phosphorus flame-retardant copolymer nylon and preparation method thereof
  • Organic phosphorus flame-retardant copolymer nylon and preparation method thereof

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preparation example Construction

[0059] The preparation method of flame-retardant nylon of the present invention comprises the following steps:

[0060] (A) reacting organophosphorus flame retardant monomers or derivatives thereof with diamine monomers to make excess amino groups to prepare salts;

[0061] (B) allowing the reaction product of step (A) to react with a lactam to generate flame-retardant nylon.

[0062] In step (A), preferably, the flame retardant reacts with the diamine monomer in a molar ratio of 1:0.1-20, preferably 1:0.5-10, more preferably 1:1-2.

[0063] In step (A), the reaction can be carried out in a solvent such as water or an organic solvent such as an alcohol solvent. Preferably, a slight excess of diamine monomers is used so that the prepared salt solution has a pH of 7-9. The reaction temperature rose from room temperature to 40-70°C within 5-20 minutes.

[0064] Preferably, the diamine monomers described in step (A) are hexamethylenediamine, decanediamine, nonanediamine, undecan...

Embodiment 1

[0080] Stir and react the flame retardant monomer and hexamethylenediamine in a small amount of water at a molar ratio of 1:1.3 at 50°C for 0.5h, adjust the pH of the solution to 7.5, and dry to form a salt. Caprolactam monomer, above-mentioned salt (accounting for 6% of total monomer mass), each accounting for 1‰ of catalyst sodium hypophosphite, antioxidant p-phenylenediamine, molecular weight regulator benzoic acid, accounting for 3% of Ionized water was added to the reactor, vacuumed, filled with nitrogen three times, and finally the pressure inside the reactor was kept at 0.25MPa. Heat the reactor and keep stirring at a high speed. When the temperature of the reactor reaches 225° C. and the pressure is 1.75 MPa, keep the temperature and pressure constant for 2 hours. Then the temperature was raised to 260°C, and the pressure was released to normal pressure within 1.5 hours. Vacuumize to -0.05MPa. After the stirring speed drops to a certain value and stabilizes, fill nitr...

Embodiment 2

[0083] Stir and react the flame retardant monomer and hexamethylenediamine in a small amount of water at a molar ratio of 1:1.1 at 50°C for 40 minutes, adjust the pH of the solution to 7.3, and dry to form a salt. The decanolactam monomer, the above-mentioned salt (accounting for 7% of the total mass of the monomer), the catalyst toluenesulfonic acid each accounting for 1‰, and the antioxidant 2,6-di-tert-butyl-4-methylphenol , adipic acid as a molecular weight regulator, and 5% deionized water were added to the reactor, vacuumed, filled with nitrogen three times, and finally the pressure in the reactor was kept at 0.2 MPa. Heat the reactor and keep stirring at a high speed. When the temperature of the reactor reaches 220° C. and the pressure is 1.9 MPa, keep the temperature and pressure constant for 2 hours. Then the temperature was raised to 270°C, and the pressure was released to normal pressure within 2 hours. Vacuumize to -0.08MPa. After the stirring speed drops to a cer...

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Abstract

The invention discloses organic phosphorus flame-retardant copolymer nylon and a preparation method thereof. The preparation method comprises the following steps: (1) reacting an organic phosphorus flame-retardant monomer with a diamine monomer to form a salt; and (2) adding a lactam monomer, the salt in the step (1) or a solution thereof, an antioxidant, a catalyst and a molecular weight regulator into a reaction kettle, and polymerizing by regulating the reaction temperature and pressure in an inert atmosphere to obtain the required organic phosphorus flame-retardant copolymer nylon. The organic phosphorus flame-retardant copolymer nylon prepared by the invention needs less reaction flame retardant, is controllable in viscosity in the preparation process and excellent in flame retardance, and can be applied to various fields such as textiles, insulating materials, tire cords and films.

Description

[0001] This case is a divisional application with the application number: 201610932391.X and the title of the invention: an organophosphorus-based flame-retardant copolymerized nylon and its preparation method. technical field [0002] The invention relates to an organophosphorus-based flame-retardant copolymerized nylon and a preparation method thereof, belonging to the field of polymer flame-retardant materials, in particular to a flame-retardant copolymerized nylon used in textiles, packaging materials, automobile parts, motor parts, engineering plastics, etc. and its preparation method. Background technique [0003] Nylon is widely used in construction, chemical industry, transportation and military fields due to its excellent properties such as high strength, heat resistance, wear resistance and solvent resistance. However, hydrogen bonds can be formed between its amide bonds and water molecules, which has greater water absorption, resulting in poor dimensional stabilit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G69/42
CPCC08G69/42
Inventor 马永梅陶云峰吕文涛方辉张京楠陈群跃张程夕易丹青郑鲲
Owner CHENGDU TALY TECH CO LTD
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