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Application of Aluminum Hydroxide in Polymer Materials
Application of Aluminum Hydroxide in Polymer Materials
How to detect the authenticity of aluminum hydroxide
How to detect the authenticity of aluminum hydroxide
Properties of Aluminum Hydroxide Flame Retardant and Its Application in Plastics
Aluminum hydroxide flame retardant is an important material widely used in plastic products. This article will focus on the performance of ultrafine aluminum hydroxide and its application in plastics. Ultrafine aluminum hydroxide is a kind of nanoscale material with excellent flame retardant properties. Its small particle size and large specific surface area can effectively improve the flame retardant properties of plastic products. At the same time, ultrafine aluminum hydroxide also has excellent thermal and chemical stability, and will not have a significant impact on other properties of plastic materials. Adding an appropriate amount of ultrafine aluminum hydroxide to plastic products can significantly improve its flame retardant performance and meet various flame retardant standards.
Introduction of aluminum hydroxide related knowledge
Aluminum hydroxide is an alkaline substance, mainly in the form of white powder. It can be dissolved in water to become aluminum hydroxide solution. This solution has a certain alkalinity. Its application range is very wide. It can be used in industry. Used as a flame retardant.
Aluminum hydroxide flame retardant selection should pay attention to quality indicators
Aluminum hydroxide flame retardant, with non-toxic, good stability, high temperature does not produce toxic gases, but also can reduce the amount of smoke plastic combustion, etc., and the dehydration heat absorption temperature is low. Add 60% aluminum hydroxide flame retardant polyolefin can be used as building materials and automotive, ship interior decoration materials.
The aluminum hydroxide used for flame retardants in the domestic and foreign markets is mainly one or three water and aluminum oxide (ATH), which is commonly expressed by the a-A120.3 H20. It is a crystalline or amorphous white powder. The crystal structure is composed of closely packed meridian ions in the form of AB double layers, while aluminum ions are in the above-mentioned packed 9s base ions, and all the octahedral voids formed are empty. This closely packed meridian ions form a layered structure, and the adjacent two layers are connected by hydrogen bonds formed by meridian ions.
Aluminum hydroxide thermal
Basic knowledge about aluminum hydroxide
Aluminum hydroxide can be used as a desiccant or flame retardant, etc. What is its flame retardant principle? What are the conditions for storage?
The flame retardant principle of aluminum hydroxide is that the products of endothermic decomposition into aluminum oxide and water are completely non-toxic and non-corrosive substances. The endothermic reaction absorbs a large amount of heat during the combustion process of the polymer, thereby protecting the polymer from rapid decomposition and delaying the formation of flammable by-products. The generated water vapor replaces oxygen, plays a similar role as inert gas, and also delays the combustion of the polymer; at the same time, a protective layer composed of alumina and carbonized products can be formed on the surface of the polymer to further inhibit combustion and reduce smoke density by adsorbing soot particles.
Aluminum hydroxide flame retardant should be stored in a cool, dry and ventilated place to prevent moisture on the grou
Aluminum hydroxide is one of the four commonly used cable flame retardants
1. antimony flame retardant
Advantages: Antimony trioxide can not be used as a flame retardant alone, but can be used in combination with appropriate halogen compounds to exert particularly effective flame retardant properties. Antimony flame retardant synergistic mechanism shortcomings: heavy metals, toxic, and arsenic homologs, crude products generally contain arsenic and other heavy metals, arsenic trioxide is arsenic. Can not be used as green filler and green flame retardant.
2. aluminum hydroxide flame retardant (ATH)
Advantages: low price, good flame retardancy.
Disadvantages: poor heat resistance, 200 ℃ that is to start dehydration, 330 ℃ to 350 ℃ that is completely dehydrated, and the curing of the resin in the aluminum hydroxide dehydration temperature range, resulting in the finished product of synthetic resin foaming, uneven surface, dielectric properties decreased, low yield. When applied to high temperature, silica gel fogging, product whitening and blistering, dielect
Morphology and Application of Aluminum Hydroxide Powder
Through the seed separation process to control the growth of the original grains of aluminum hydroxide products, ultrafine aluminum hydroxide micropowder with complete grains, narrow particle size distribution and high whiteness can be obtained.
Aluminum hydroxide powder has the characteristics of round and smooth micro-morphology, high surface activity, reasonable particle size distribution, low price and beauty. It has the characteristics of low oil absorption rate, low viscosity, high dispersion, high fluidity, high addition amount and high flame retardancy in the use of ingredients. It can significantly reduce the amount of resin, improve the flame retardant and insulation properties of the final product, and significantly reduce the comprehensive production cost of the final product, products are widely used in SMC/DMC molding compounds, epoxy/silicone rubber packaging, grille, profiles and other industries.
Aluminum hydroxide powder can be used as filling and coating for high-g
Aluminum Hydroxide in Fire Retardant Coatings for Wire and Cable
With the rapid development of social economy, science and technology, and the continuous improvement of people's material and cultural level, high-rise buildings, underground projects, large space buildings, power communication departments, large enterprises continue to appear, and their internal wires and cables are widely used. In order to prevent the occurrence and development of cable fires and reduce the economic losses caused by them, fire retardant coatings are used as flame retardant protection for cables, it is of great significance to prevent the initial fire and slow down the spread of the fire, ensure the safety of the country and people's lives and property, and promote the cause of fire control.
As a special coating, cable fire retardant coating is composed of two parts: base material and flame retardant additive (aluminum hydroxide). In addition to the decorative effect of ordinary coating and the physical protection of cable substrate, it also needs to have the special
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