Common alumina trihydrate uses and its advantages as a flame retardant

Alumina trihydrate is a commonly used raw material in the fields of chemical, pharmaceutical, industrial, and electronic industries, and its uses are countless. This article lists the common alumina trihydrate uses and its advantages as a flame retardant.

Common alumina trihydrate uses

-Used in the production of alumina products.

-Used in the production of inorganic salts such as aluminum fluoride, cryolite, and aluminum sulfate.

-Used in the manufacture of waterproof fabrics, inks, glassware, paper fillers, roller skating agents, and other supplies.

-The colloidal solution of alumina trihydrate has a large adsorption capacity and can adsorb or combine with colorants to fix the colorants on cotton yarn fibers. It is used as a mordant in the dye industry.

-The colloid of alumina trihydrate can bind turbidity in water and precipitate it, so it is used as a water purifier.

-Alumina trihydrate uses as a long-standing (non-specific) antacid that can resist acid, adsorb, stop bleeding locally, and protect ulcer surfaces. It acts slowly and lasts for a long time, but the effect is weak. It is often used as a drug to neutralize gastric acid.

Alumina trihydrate uses as a flame retardant

Its flame retardant mechanism can be roughly summarized as follows:

(1) Endothermic effect. Dehydration absorbs heat at 200-350℃, inhibiting the temperature rise of the polymer;

(2) Dilution effect. Al(OH)3 filling reduces the concentration of combustible polymers. The water vapor released by Al(OH)3 dehydration dilutes the concentration of combustible gases and oxygen, which can prevent combustion;

(3) Covering effect. After Al(OH)3 is dehydrated, an Al2O3 protective film is generated on the surface of the combustible material, isolating oxygen and preventing further combustion;

(4) Carbonization effect. Alumina trihydrate produces strong dehydrating substances under combustion conditions, which carbonizes the plastic and is not easy to produce combustible volatiles, thereby preventing the spread of flames.

Advantages of alumina trihydrate flame retardant

Although bromine flame retardants in organic flame retardants have the advantages of high flame retardant efficiency, low addition amount, and wide application range, in order to comply with the development trend of high flame retardancy, low smoke, and harmlessness in the flame retardant market, the development and utilization of inorganic flame retardants have gradually received more support.

Ultrafine alumina trihydrate has stable physical and chemical properties at room temperature, does not produce secondary pollution when burned, has high whiteness, and has excellent color index. Moreover, nano alumina trihydrate can not only improve the limited oxygen index of flame retardant polymers and increase flame retardant properties, but also help to improve the surface finish and mechanical and electrical properties of polymer products, and enhance their anti-leakage, arc resistance, and wear resistance. In addition, the composite use of alumina trihydrate and other flame retardants is very ideal, and it is an inorganic flame retardant with broad prospects.