Preparation method of halogen-free low-smoke intrinsic flame-retardant nylon 66 composite material

An intrinsic flame retardant, composite material technology, applied in yarn, fiber processing, textiles and papermaking, etc., can solve the problems of increasing the flame retardant mechanical properties of nylon 66, poor compatibility, large amount of addition, etc., to improve compatibility. The effect of improving flame retardancy and good flame retardancy

Inactive Publication Date: 2019-09-13
NORTHWEST NORMAL UNIVERSITY
View PDF10 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its compatibility with polymers is relatively poor, it is easy to agglomerate, and the addition amount is large, so it needs to be surface modified, so as to increase the flame retardancy of nylon 66 without negatively affecting its mechanical properties.

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
  • Preparation method of halogen-free low-smoke intrinsic flame-retardant nylon 66 composite material
  • Preparation method of halogen-free low-smoke intrinsic flame-retardant nylon 66 composite material
  • Preparation method of halogen-free low-smoke intrinsic flame-retardant nylon 66 composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Preparation of modified flame retardant: Dissolve 2.9 g of magnesium hydroxide in a round-bottomed flask filled with 100 mL of distilled water, ultrasonicate for 30 min; take 10.7 g of 2-carboxyethylphenylphosphinic acid into the flask , magnetic stirring at 100 °C for 5 h, rotary evaporation to remove the solvent, and drying at 80 °C for 24 h to obtain 2-carboxyethylphenylphosphinic acid modified magnesium hydroxide flame retardant;

[0032](2) Synthesis of halogen-free, low-smoke intrinsic flame-retardant nylon 66: Take 500 g of nylon 66 salt, prepare a 60% salt solution with 333 mL of distilled water, add 1.625 g of adipic acid to adjust the pH of the solution to about 7.6; take 8 g of the modified magnesium hydroxide flame retardant synthesized above were dispersed in distilled water, and 4 g of 1,6-hexanediamine was added to adjust the pH of the solution to about 7.6; Fill the reactor with nitrogen and discharge the air in the system. After three gas replacemen...

Embodiment 2

[0035] (1) Preparation of modified flame retardant: Dissolve 3.9 g of aluminum hydroxide in a round-bottomed flask filled with 100 mL of distilled water, sonicate for 30 min, add 8.66 g of p-aminobenzenesulfonic acid into the flask, and magnetically Stir for 5 h to remove the solvent by rotary evaporation, and dry at 80°C for 24 h to obtain a p-aminobenzenesulfonic acid modified aluminum hydroxide flame retardant;

[0036] (2) Synthesis of halogen-free, low-smoke intrinsic flame-retardant nylon 66: the added flame retardant is p-aminobenzenesulfonic acid modified aluminum hydroxide flame retardant, and the others are the same as in Example 1;

[0037] (3) Flame retardant performance of intrinsic flame retardant nylon 66 composite material: LOI=24.9%; THR=98.3 MJ / m 2 , PHRR=860.5kW / m 2 , TSP=8.3 m 2 .

Embodiment 3

[0039] (1) Preparation of modified flame retardant: Organic functionalization of magnesium hydroxide: Dissolve 2.9 g of magnesium hydroxide in a round-bottomed flask filled with 100 mL of distilled water, sonicate for 30 min, and dissolve 8.66 g of p-aminobenzenesulfonic acid Add to the flask, stir magnetically at 90°C for 5h, remove the solvent by rotary evaporation, and dry at 80°C for 24h to obtain a magnesium hydroxide flame retardant modified with p-aminobenzenesulfonic acid.

[0040] (2) Synthesis of halogen-free low-smoke intrinsic flame-retardant nylon 66: the added flame retardant is magnesium hydroxide flame retardant modified by p-aminobenzenesulfonic acid, and the others are the same as in Example 1;

[0041] (3) Flame retardant properties of intrinsically flame retardant nylon 66 composites: LOI=25.3%; THR=97.9 MJ / m 2 , PHRR=843.5kW / m 2 , TSP=8.0 m 2 .

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

PropertyMeasurementUnit
oxygen indexaaaaaaaaaa
Login to view more

Abstract

The invention discloses a preparation method of a halogen-free low-smoke intrinsic flame retardant nylon 66 composite material, which is prepared by using organic acid modified metal hydroxide as a flame retardant according to a conventional preparation process. Through reactive modification of metal hydroxide with organic acid containing flame-retardant elements such as P, N, S, the agglomerationbehavior of the metal hydroxide in a polymer is effectively reduced, and compatibility between the flame retardant and nylon 66 is improved. Meanwhile, by introducing a series of flame-retardant functional groups such as P, N, S, flame retardance of the nylon 66 is greatly enhanced, and the smoke suppression effect is also achieved to some extent. Thereby, the prepared intrinsic nylon 66 composite material has good flame retardant property (oxygen index can reach 25.8) and low-smoke effect.

Description

technical field [0001] The invention relates to a flame-retardant nylon 66 composite material, in particular to a method for preparing a halogen-free, low-smoke intrinsically flame-retardant nylon 66 composite material, and belongs to the technical fields of flame-retardant materials and polymer materials. Background technique [0002] The output of nylon ranks first among engineering plastics and has become an indispensable structural material in all walks of life. Among them, nylon 66 has an output of up to 50% of nylon production. Nylon 66 itself has a certain flame retardancy. According to the American UL94 standard, nylon 66 has passed the vertical combustion test, and its flame retardancy level can reach V-2. After the oxygen index measurement, the value can reach 24, so nylon materials can be used for flame retardancy. For less demanding occasions. [0003] Although the nylon material itself has certain flame retardant properties, the flame retardant properties of n...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/06C08K9/04C08K3/22
CPCC08K9/04C08K3/22C08K2003/2224C08K2003/2227C08K2003/2206C08L2201/02C08L2201/22C08L77/06D02G3/443D10B2331/02D06M11/36D10B2401/04D06M10/02D06M13/288
Inventor 雷自强范慧吕鑫尧杨尧霞曾巍杨志旺
Owner NORTHWEST NORMAL UNIVERSITY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap