Organic phosphorus co-polymerized flame retardant polyamide composition and preparation method thereof

A technology of polyamide composition and flame-retardant polyamide, which is applied in the manufacture of fire-resistant and flame-retardant filaments, single-component polyamide artificial filaments, and rayon manufacture, etc.

Inactive Publication Date: 2017-03-15
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 co-polymerized flame retardant polyamide composition and preparation method thereof
  • Organic phosphorus co-polymerized flame retardant polyamide composition and preparation method thereof
  • Organic phosphorus co-polymerized 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 includes: (1) preparing the flame-retardant copolymerized polyamide by the following steps:

[0067] (A) Reaction of organophosphorus flame retardant monomers with diamines, preferably with an excess of amino groups, to generate a salt solution;

[0068] (B) reacting the reaction product of step (A) with diacid and diamine or dibasic amide salt in the presence of inorganic nanomaterials to produce 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 is 7-9. The react...

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 0.5h, 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 salt obtained above accounting for 6.0% of the mass of nylon 66 salt (excluding the solvent, the same below), accounting for 4wt% of the mass of nano-montmorillonite, each accounting 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 ho...

Embodiment 2

[0091] Stir the flame retardant monomer and hexamethylenediamine in an aqueous solution at 50°C for 1 hour at a molar ratio of 1:1.3, and adjust the pH of the solution to 7.8. Adipic acid and hexamethylenediamine are configured according to the 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, nitrogen filled 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. Vacuumize to -0....

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Abstract

The invention discloses an organic phosphorus co-polymerized flame retardant polyamide composition and a preparation method thereof. The organic phosphorus co-polymerized flame retardant polyamide composition comprises organic phosphorus co-polymerized flame retardant polyamide as shown in the formula (1) and an inorganic nano-material which accounts for 0.1-10 wt% of weight of the organic phosphorus co-polymerized flame retardant polyamide. According to the prepared organic phosphorus co-polymerized flame retardant polyamide composition, dosage of a reactive flame retardant is low, and viscosity is controllable during the preparation process. The product has excellent mechanical properties, remarkable molten drop resistance and outstanding flame resistance.

Description

technical field [0001] 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 [0002] 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. Therefore, how to modify and prepare polyamides with good flame retardant properties has been researched by industry personnel. [0003] There are usually two ways to modify the flame retardant polyamide material: one is to add a reactive flame retardant ...

Claims

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Application Information

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IPC IPC(8): C08L77/06C08K3/34C08K5/18C08K5/13C08K3/22C08K5/372C08K5/134C08G69/26D01F6/90D01F1/10
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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