Charring-boosting low-smoke zero-halogen nanometer flame-retardant composite material of ethylene-vinyl acetate copolymer and preparation method thereof

A vinyl acetate and nano-flame retardant technology, which is applied in the field of flame-retardant materials, can solve problems such as poor compatibility, poor char formation quality, and uneven dispersion of nano-components, so as to improve flame-retardant efficiency and cost-effectiveness The effect of charcoal quality and smoke suppression effect

Inactive Publication Date: 2017-03-15
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems that existing environmentally friendly flame-retardant ethylene-vinyl acetate composite materials have poor charring quality, poor compatibility, and uneven dispersion of nano-components, one of the purposes of the present invention is to provide a method that can promote coagulation phase-forming charcoal and low-smoke and halogen-free nano-flame-retardant composite materials, the low-smoke and halogen-free nano-composite material has a good char-forming effect, and the second purpose of the present invention is to provide a kind of ethylene-acetic acid that promotes condensed phase char-forming behavior Preparation method of nano flame retardant composite material of vinyl ester

Method used

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  • Charring-boosting low-smoke zero-halogen nanometer flame-retardant composite material of ethylene-vinyl acetate copolymer and preparation method thereof
  • Charring-boosting low-smoke zero-halogen nanometer flame-retardant composite material of ethylene-vinyl acetate copolymer and preparation method thereof
  • Charring-boosting low-smoke zero-halogen nanometer flame-retardant composite material of ethylene-vinyl acetate copolymer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] An ethylene-vinyl acetate composite material, based on the total mass of the composite material as 100%, each component and mass percentage are as follows:

[0032]

[0033]

[0034] The concrete steps of ethylene-vinyl acetate composite material preparation method are as follows:

[0035] (1) Bake ethylene-vinyl acetate, compatibilizer, hydromagnesite, montmorillonite, antioxidant, silicone powder and coupling agent in the oven for 4 hours, and then add them to the high mixer together. Stir at high speed for 15 minutes;

[0036] (2) Send the mixed raw materials into a high-shear twin-screw extruder feeder, the temperature of the twin-screw extruder is 190°C to 200°C, the feeding frequency is 10rpm, and the main engine frequency is 20rpm; then, After air cooling, it is then granulated by a granulator;

[0037] (3) The pellets were dried at 60°C for 3 hours, and then injection-molded in an injection molding machine. The temperature range of each section during mo...

Embodiment 2

[0040] An ethylene-vinyl acetate composite material, based on the total mass of the composite material as 100%, each component and mass percentage are as follows:

[0041]

[0042] The concrete steps of ethylene-vinyl acetate composite material preparation method are as follows:

[0043] (1) Bake ethylene-vinyl acetate, compatibilizer, hydromagnesite, montmorillonite, antioxidant, silicone powder and coupling agent in the oven for 4 hours, and then add them to the high mixer together. Stir at high speed for 15 minutes;

[0044] (2) Send the mixed raw materials into a high-shear twin-screw extruder feeder, the temperature of the twin-screw extruder is 190°C to 200°C, the feeding frequency is 10rpm, and the main engine frequency is 20rpm; then, After air cooling, it is then granulated by a granulator;

[0045] (3) Dry the pellets at 60°C for 3 hours, and then inject them into an injection molding machine. The temperature of each section of the injection molding machine shou...

Embodiment 3

[0048] An ethylene-vinyl acetate composite material, based on the total mass of the composite material as 100%, each component and mass percentage are as follows:

[0049]

[0050] The concrete steps of ethylene-vinyl acetate composite material preparation method are as follows:

[0051] (1) Bake ethylene-vinyl acetate, compatibilizer, hydromagnesite, aluminum hydroxide, synergist, montmorillonite and processing aids in an oven for 4 hours, and then ethylene-vinyl acetate, Montmorillonite and antioxidant were mixed in a high mixer for 15 minutes;

[0052] (2) Send the mixed raw materials into a high-shear twin-screw extruder feeder, the temperature of the twin-screw extruder is 130°C to 140°C, the feeding frequency is 10rpm, and the main engine frequency is 20rpm; then, After air cooling, then granulate through a granulator; then mix the extruded and granulated pellets with compatibilizer, hydromagnesite, aluminum hydroxide, silicone powder, and coupling agent in a high-sp...

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Abstract

The invention relates to a charring-boosting low-smoke zero-halogen nanometer flame-retardant composite material of an ethylene-vinyl acetate copolymer and a preparation method thereof, and specifically relates to a nanometer flame-retardant composite material of the ethylene-vinyl acetate copolymer based on a nanometer composite flame retardant and the preparation method thereof, belonging to the technical field of flame-retardant materials. The method comprises the following steps: melting and extruding the materials, including the ethylene-vinyl acetate copolymer, hydromagnesite, a compatilizer, a synergist, nanometer auxiliaries, processing agents, and the like, step by step in a high-shear twin-screw extruder in different charging sequences, and then pelletizing and performing injection molding, thereby acquiring the ethylene-vinyl acetate nanometer flame-retardant composite material. The ethylene-vinyl acetate composite material provided by the invention has the advantages that the flue gas release volume is relatively low, the condensation phase charring can be boosted, the charring process is improved, the charring quality is promoted, the flame retardant property is effectively improved, and the popularization and application values are better.

Description

technical field [0001] The invention relates to a low-smoke halogen-free nano-flame-retardant composite material of ethylene-vinyl acetate copolymer that promotes carbonization and a preparation method thereof, in particular to an ethylene-vinyl acetate copolymer based on a nano-composite flame retardant The nano flame-retardant composite material and its preparation method belong to the technical field of flame-retardant materials. Background technique [0002] Ethylene-vinyl acetate has been widely used in many fields due to its excellent performance. Due to its good processing properties, mechanical properties and weather resistance, it is widely used as hot melt adhesives, packaging and wires and cables. However, due to ethylene-vinyl acetate The flammable nature of esters limits their applications. At present, ethylene-vinyl acetate not only has flame retardant requirements, but also has higher and higher requirements for its safety and environmental protection. There...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08C08L23/06C08K13/02C08K3/26C08K3/22C08K3/34
CPCC08L23/0853C08K2201/011C08L2201/02C08L2201/22C08L2205/02C08L2205/025C08L2205/03C08L2205/035C08L23/06C08L23/0815C08L83/04C08K13/02C08K2003/267C08K2003/2224C08K3/346C08K3/34C08K2003/2227C08K3/36C08K2003/2241
Inventor 李定华程博杨荣杰
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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