Unlock instant, AI-driven research and patent intelligence for your innovation.

P-N-Si synergistic flame-retardant copolyamide 66 and preparation method thereof

A flame retardant copolyamide and polyamide technology, which is applied in the field of P-N-Si synergistic flame retardant copolyamide 66 and its preparation, can solve the problems of complex processing technology, influence of material mechanical properties and high cost, and achieve flame retardant effect Good results

Active Publication Date: 2019-05-03
THE QUARTERMASTER RES INST OF THE GENERAL LOGISTICS DEPT OF THE CPLA
View PDF5 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there are three types of methods for flame retardant modification of polymer materials: first, adding flame retardants for blending, and using twin-screws to disperse and mix nylon 66 and flame retardants strongly during extrusion granulation to achieve flame retardant modification , which is characterized by a wide range of applications and easy operation, but it requires a large amount of addition to achieve a good flame retardant effect, and the mechanical properties of the material will be affected; second, use a reactive flame retardant and add it when nylon 66 is polymerized. Reactive flame retardant monomers are copolymerized, and flame retardants are directly introduced into the nylon molecular chain. A small amount of addition can achieve flame retardancy and the flame retardants will not have migration and dispersion problems, but the suitable type of reactive flame retardants Less, the processing technology is relatively complicated, and the cost is high; third, after flame-retardant post-treatment, nylon 66 fabrics can be combined with flame retardants and fabrics through flame-retardant post-treatment, that is, grafting, rolling baking, spray coating, etc., so as to achieve Flame retardant, this method is simple and easy to operate, but it will cause loss of fabric strength and poor hand feeling

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • P-N-Si synergistic flame-retardant copolyamide 66 and preparation method thereof
  • P-N-Si synergistic flame-retardant copolyamide 66 and preparation method thereof
  • P-N-Si synergistic flame-retardant copolyamide 66 and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Example 1, P-N-Si synergistic copolymerization flame retardant copolymerized polyamide 66

[0049] Add bis(4-carboxyphenyl)phenylmethylphosphine oxide (R in formula I is methylbenzene) and hexamethylenediamine to the reactor at a molar ratio of 1:1.1, and stir at 60°C for 1.5h to make it Mix completely. Then adjust the pressure to 0.2MPa, raise the temperature to 150°C, and pre-polymerize for 30min. After cooling down to room temperature, it was suction filtered and washed with deionized water to obtain a phosphorus-containing flame retardant prepolymer.

[0050]Add 60 parts of deionized water, 100 parts of nylon 66 salt, 1 part of catalyst sodium phosphite, 0.1 part of antioxidant 1010 and 10 parts of phosphorus-containing flame retardant prepolymer into the reactor, and repeat vacuuming and nitrogen filling for 3 to 6 times , remove all the air in the kettle, and keep the pressure in the kettle at 0.2MPa. Heating the reaction kettle and starting stirring at the sam...

Embodiment 2

[0051] Example 2, P-N-Si synergistic copolymerization flame retardant copolymerized polyamide 66

[0052] Add bis(4-carboxyphenyl)phenylpropenylphosphine oxide (R in formula I is propenylbenzene) and propylenediamine to the reactor at a molar ratio of 1:1.2, and stir at 80°C for 0.5h to make It's completely mixed. Then adjust the pressure to 0.3MPa, raise the temperature to 170°C, and prepolymerize for 1 hour. After cooling down to room temperature, it was suction filtered and washed with deionized water to obtain a phosphorus-containing flame retardant prepolymer.

[0053] Add 30 parts of deionized water, 100 parts of nylon 66 salt, 0.1 part of catalyst sodium hypophosphite, 1 part of antioxidant 1010 and 0.1 part of phosphorus-containing flame retardant prepolymer into the reactor, and repeat vacuuming and nitrogen filling for 3 to 6 times , remove all the air in the kettle, and keep the pressure in the kettle at 0.1MPa. Heating the reaction kettle and starting to stir at...

Embodiment 3

[0054] Example 3, P-N-Si synergistic copolymerization flame retardant copolymerized polyamide 66

[0055] Add bis(4-carboxyphenyl)phenylpentylphosphine oxide (R in formula I is n-pentylbenzene) and decanediamine to the reactor at a molar ratio of 1:1.1, and stir at 70°C for 1h. Let it mix completely. Then adjust the pressure to 0.25MPa, raise the temperature to 160°C, and pre-polymerize for 50min. After cooling down to room temperature, it was suction filtered and washed with deionized water to obtain a phosphorus-containing flame retardant prepolymer.

[0056] Add 40 parts of deionized water, 100 parts of nylon 66 salt, 1 part of catalyst potassium phosphate, 0.5 parts of antioxidant 1010 and 5 parts of phosphorus-containing flame-retardant prepolymer into the reactor, and repeat vacuuming and nitrogen filling for 3 to 6 times. Remove all the air in the kettle and keep the pressure in the kettle at 0.2MPa. Heating the reaction kettle and starting stirring at the same time,...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a P-N-Si synergistic flame-retardant copolyamide 66 and a preparation method thereof. The preparation method of the P-N-Si synergistic flame-retardant copolyamide 66 is characterized in that a phosphorus-containing flame retardant prepolymer, a nitrogen-containing flame retardant and a silicon-containing flame retardant are added during the polymerization of polyamide 66 toobtain the P-N-Si synergistic flame-retardant copolyamide 66; and the phosphorus-containing flame retardant prepolymer is obtained by a salt-forming reaction and a prepolymerization reaction of a phosphorus-containing flame retardant and diamine. The BCPPO derivative flame retardant prepolymera melamine cyanurate, the silicon-containing flame retardant and the polyamide 66 salt are reacted and copolymerized through adopting a P-N-Si synergistic flame-retardant system to prepare the P-N-Si synergistic copolymer flame retardant nylon material. The synergistic effect makes the flame retardant have a high flame retardation efficiency, and the flame retardant material obtained by the copolymerization method ensures the molecular weight and mechanical properties of the material.

Description

technical field [0001] The invention relates to a P-N-Si synergistic flame-retardant copolymerized polyamide 66 and a preparation method thereof, belonging to the field of flame-retardant material preparation. Background technique [0002] Nylon is the engineering plastic with the largest amount and the widest application. Nylon 66 is one of the most important nylon varieties. It can face more severe use environment and is often used as fiber material and engineering plastics. The limiting oxygen index of nylon 66 is not high, and the flame retardant effect is not ideal. It is of great significance to improve its flame retardant performance. [0003] At present, there are three types of methods for flame retardant modification of polymer materials: first, adding flame retardants for blending, and using twin-screws to disperse and mix nylon 66 and flame retardants strongly during extrusion granulation to achieve flame retardant modification , which is characterized by a wid...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C08G69/48
Inventor 冯新星张华梁高勇潘凯
Owner THE QUARTERMASTER RES INST OF THE GENERAL LOGISTICS DEPT OF THE CPLA