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Preparation of Composite Antimony Trioxide and Its Application in High Flame Retardancy EVA Foaming Materials

A technology of antimony trioxide and antimony pentoxide, applied in antimony oxide/antimony hydroxide/antimony oxyacids, inorganic chemistry, antimony compounds, etc., can solve problems such as suffocation, non-compliance with ROHS instructions, and large usage , to achieve the effect of broadening the application range, excellent flame retardant performance, and enhancing flame retardant performance

Active Publication Date: 2018-07-31
SANSD JIANGSU ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] EVA is made of ethylene-vinyl acetate copolymer (also known as ethylene-vinyl acetate copolymer) by copolymerization of ethylene (E) and vinyl acetate (VA). EVA foaming materials are the same as other foaming materials. In the construction and packaging industry, the requirements for its flame retardant performance are very important. The current practice is to properly add flame retardants to the formula to achieve the effect. The commonly used flame retardants magnesium hydroxide and aluminum hydroxide are suitable for EVA foam products. It has a certain effect, but it is used in a large amount, and the flame retardant effect is not ideal for products with high flame retardant requirements. In addition, there is also a Japanese flame retardant product, but it does not meet the ROHS directive
[0004] Antimony trioxide is a good additive flame retardant, generally used as a flame retardant in synergy with other halogenated flame retardants to produce better results, but it contains halogen, which will burn when burned It releases a large amount of smoke and toxic and corrosive harmful gases, and 80% of the fatal accidents in the fire are caused by suffocation of smoke and harmful gases. Therefore, a halogen-free resistor suitable for EVA foam materials Combustion agent worth researching

Method used

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  • Preparation of Composite Antimony Trioxide and Its Application in High Flame Retardancy EVA Foaming Materials
  • Preparation of Composite Antimony Trioxide and Its Application in High Flame Retardancy EVA Foaming Materials

Examples

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Effect test

Embodiment 1

[0020] The preparation of composite antimony trioxide comprises the following steps:

[0021] (1) Put antimony pentoxide and sodium hydroxide solution into the supercritical reactor, feed reducing agent carbon monoxide, open the ultrasonic device, control the temperature to be 300 ° C, the pressure is 10MPa, open the carbon dioxide cylinder after the reaction 20min, carbon dioxide gas After being cooled by a cooler into a liquid, it is pressurized by a high-pressure pump and then enters the reactor, and the reaction is continued for 20min;

[0022] (2) opening the pressure relief port and reducing the pressure in the supercritical reactor to normal pressure to obtain powder;

[0023] (3) calcining the collected powder at a temperature of 800° C. to obtain the primary product of antimony trioxide;

[0024] (4) The primary product of antimony trioxide and aluminum hydroxide are prepared into composite antimony trioxide by ultrasonic precipitation in a mass ratio of 5:1.

Embodiment 2

[0026] The preparation of composite antimony trioxide comprises the following steps:

[0027] (1) antimony pentoxide and potassium hydroxide solution are put into supercritical reactor, feed reducing agent carbon monoxide, open ultrasonic device, control temperature is 350 ℃, pressure is 15MPa, open carbon dioxide steel cylinder after reaction 30min, carbon dioxide gas After being cooled into a liquid by a cooler, it is pressurized by a high-pressure pump and then enters the reaction kettle, and the reaction is continued for 40min;

[0028] (2) opening the pressure relief port and reducing the pressure in the supercritical reactor to normal pressure to obtain powder;

[0029] (3) calcining the collected powder at a temperature of 900 ° C to obtain the primary product of antimony trioxide;

[0030] (4) The primary product of antimony trioxide and aluminum hydroxide are prepared into composite antimony trioxide by ultrasonic precipitation in a mass ratio of 5:1.

Embodiment 3

[0032] The preparation of composite antimony trioxide comprises the following steps:

[0033] (1) Put antimony pentoxide and sodium hydroxide solution into the supercritical reactor, feed reducing agent carbon monoxide, open the ultrasonic device, control the temperature to be 330 ° C, the pressure is 13MPa, open the carbon dioxide cylinder after the reaction 25min, carbon dioxide gas After being cooled by a cooler into a liquid, it is pressurized by a high-pressure pump and then enters the reactor, and the reaction is continued for 30min;

[0034] (2) opening the pressure relief port and reducing the pressure in the supercritical reactor to normal pressure to obtain powder;

[0035] (3) calcining the collected powder at a temperature of 850° C. to obtain a primary product of antimony trioxide;

[0036] (4) The primary product of antimony trioxide and aluminum hydroxide are prepared into composite antimony trioxide by ultrasonic precipitation in a mass ratio of 5:1.

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Abstract

The invention discloses compound antimonous oxide preparation and application thereof in high-fire-resistance EVA foaming material. Antimony oxide and carbon monoxide are utilized to be prepared into an antimonous oxide crude product under alkaline condition through assistance of carbon dioxide supercritical reaction, and the antimonous oxide crude product is mixed with aluminum hydroxide to be prepared into the compound antimonous oxide through an ultrasonic precipitation method. Fire resistance of the antimonous oxide is effectively enhanced under the premises of avoiding halogen flame retardant and reducing use of aluminum hydroxide flame retardant; the prepared foaming material not only has varieties of excellent performance of an ordinary foaming material, but also has excellent fire resistance when the antimonous oxide is applied to preparation of the EVA foaming material; an application range of the foaming material in varieties of inflammable building package materials is widened.

Description

technical field [0001] The invention relates to the field of foaming material additives, in particular to the preparation of a composite antimony trioxide and its application in high flame-retardant EVA foaming materials. Background technique [0002] Foamed material refers to a foamed material that gasifies bubbles inside the material to make it into a porous material. It has the advantages of light weight, high specific strength, excellent insulation performance, significant buffering capacity and strong adsorption capacity, and has been widely used. In the automotive industry, construction industry, packaging industry, agriculture, water treatment and air filtration and other fields; such as the manufacture of foamed plastics, foamed rubber, foamed resin, etc. [0003] EVA is made of ethylene-vinyl acetate copolymer (also known as ethylene-vinyl acetate copolymer), which is obtained by copolymerizing ethylene (E) and vinyl acetate (VA). In the construction and packaging ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K3/22C08L23/08C08L23/06C08K13/02C01G30/00
CPCC01G30/005C08K3/22C08K3/2279C08K2003/2227C08L23/0853C08L2201/02C08L2201/22C08L2203/14C08L23/06C08K13/02
Inventor 陈渠鍫丁华雄
Owner SANSD JIANGSU ENVIRONMENTAL PROTECTION TECH
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