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Organic phosphorus copolymerized flame-retardant polyamide composition and preparation method thereof

A polyamide composition and copolymer flame retardant technology, which are applied in the manufacture of fire-retardant and flame-retardant filaments, single-component polyamide rayon filaments, and rayon manufacturing, etc., to achieve the effects of controllable viscosity and good anti-drip effect.

Pending Publication Date: 2021-11-12
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 copolymerized flame-retardant polyamide composition and preparation method thereof
  • Organic phosphorus copolymerized flame-retardant polyamide composition and preparation method thereof
  • Organic phosphorus copolymerized flame-retardant polyamide composition and preparation method thereof

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preparation example Construction

[0066] The preparation method of the organophosphorus-based flame-retardant copolymerized polyamide of the present invention specifically comprises: (1) preparing the flame-retardant copolymerized polyamide by the following steps:

[0067] (A) reacting an organophosphorus flame retardant monomer with a diamine, preferably making the amino group excessive, to generate a salt solution;

[0068] (B) reacting the reaction product of the step (A) with a diacid and a diamine or a dibasic amide salt in the presence of an inorganic nanomaterial to produce an organophosphorus copolymerized flame-retardant polyamide;

[0069] (B') reacting the reaction product of step (A) with diacid and diamine or dibasic amide salt to produce organophosphorus copolymerized flame-retardant polyamide, and then blending the copolymerized flame-retardant polyamide with inorganic nanomaterials.

[0070] In step (A), preferably, the diamine monomer is slightly excessive, so that the pH of the salt solution ...

Embodiment 1

[0088] Stir and react the flame retardant monomer and hexamethylenediamine in an aqueous solution at a molar ratio of 1:1.2 at 40°C for 0.5 h, adjust the pH of the solution to 7.2, and dry to form a salt. Mix 50% nylon 66 salt (hexamethylene adipamide salt) solution with the above-mentioned salt that accounts for 6.0% of the quality of nylon 66 salt (excluding solvent, the same below), account for its quality 4wt% nano-montmorillonite, each account for The catalyst sodium hypophosphite with a ratio of 1wt‰ and the antioxidant p-phenylenediamine were added to the reactor, vacuumed and filled with nitrogen for 5 times, and finally the internal pressure of the reactor was kept at 0.2MPa. Heat the reactor, keep stirring at a high speed, and when the temperature of the reactor reaches 220°C and the pressure is 1.8 MPa, keep the temperature and pressure constant for 1.5 hours. Then the temperature was raised to 250°C, and the pressure was released to normal pressure within 1 hour. ...

Embodiment 2

[0091] Stir and react the flame retardant monomer and hexamethylenediamine in an aqueous solution at a molar ratio of 1:1.3 at 50°C for 1 hour, and adjust the pH of the solution to 7.8. Adipic acid and hexamethylenediamine are configured according to a molar ratio of 1:1.2, and the above-mentioned salt solution (calculated as salt) accounting for 7% of its weight and nano-talc accounting for 4wt% of its weight, each accounting for 1‰ The catalyst toluenesulfonic acid, the antioxidant 2,6-di-tert-butyl-4-methylphenol, and 35% deionized water were added to the reactor, vacuumed, filled with nitrogen for 3 times, and finally kept the reaction The pressure inside the kettle is 0.3MPa. Heat the reactor, keep stirring at a high speed, and when the temperature of the reactor reaches 215°C and the pressure is 1.7 MPa, keep the temperature and pressure constant for 1.6 hours. Then the temperature was raised to 240°C, and the pressure was released to normal pressure within 1.5 hours. ...

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Abstract

The invention discloses an organic phosphorus copolymerized flame-retardant polyamide composition and a preparation method thereof. The organophosphorus copolymerized flame-retardant polyamide composition comprises organophosphorus copolymerized flame-retardant polyamide as shown in a formula (1) and an inorganic nano material which accounts for 0.1-10wt% of the organophosphorus copolymerized flame-retardant polyamide. According to the prepared organic phosphorus copolymerized flame-retardant polyamide composition, the addition amount of the reactive flame retardant is small, the viscosity is controllable in the preparation process, and the obtained product is excellent in mechanical property, remarkable in anti-dripping effect and excellent in flame retardant property.

Description

[0001] This case is a divisional application of the patent application with application number 201610933535.3 and the title of the invention "An organophosphorus-based copolymerized flame-retardant polyamide composition and its preparation method". technical field [0002] The invention belongs to the technical field of flame retardant polymer synthesis, and relates to a copolymerized flame retardant polyamide composition and a preparation method thereof, in particular to a polymer material composition in which a phosphorus-containing reactive flame retardant is copolymerized and embedded in a polyamide molecular chain and its preparation method. Background technique [0003] Polyamide is widely used in construction, chemical industry, transportation and military fields because of its excellent properties, such as high strength, heat resistance, wear resistance, solvent resistance, etc. However, polyamide itself is not flame retardant and may cause or aggravate fires. There...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/06C08K3/34C08K5/18C08K3/26C08K5/13C08K5/134C08G69/42D01F6/90D01F1/10D01F1/07
CPCD01F1/10D01F6/90C08K3/346C08K5/13C08K5/1345C08K5/18C08K3/26C08G69/42D01F1/07C08L2201/02C08L77/06
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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