Introduction to environmentally friendly flame retardants

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Environmental flame retardant fabric

Environmentally friendly flame retardants can be evaluated from three aspects: 1. Flame retardant production and flame retardant usage processes should minimize or eliminate harm to workers’ health and the ecological environment around the factory; 2. Flame retardants should not cause harm to human safety or cause pollution to the environment in the event of a fire; 3. Add flame retardants Flame retardants are not allowed to cause irreversible damage to the atmosphere, soil, water, and organisms when the polymer material products are discarded, recycled, and flowed into nature. To truly achieve low toxicity, low smoke, and no environmental pollution, it is crucial to prevent the pollution of flame retardant materials from the source.

With With the increasing awareness of environmental protection, safety and health, various countries have focused on the research, development and application of environmentally friendly flame retardants, and have achieved satisfactory results. In recent years, most flame retardant suppliers and users have shown high enthusiasm for flame retardant and halogen-free, and have also invested a lot of effort in the development of related flame retardant materials.

Magnesium series Flame retardants

Magnesium series flame retardants are mainly magnesium hydroxide, basic magnesium sulfate whiskers, etc., which are better than hydroxide Aluminum is a more excellent environmentally friendly flame retardant.

Hydrogen oxidation There are physical and chemical methods for magnesium production and processing. The physical method is to grind brucite, the natural ore of magnesium hydroxide, and the chemical method is to convert magnesium oxide or magnesium salt into magnesium hydroxide through a chemical reaction. The production of magnesium hydroxide flame retardants does not produce a large amount of waste that is harmful to the environment. The thermal decomposition temperature of magnesium hydroxide is 340°C. When it decomposes, it releases bound water and absorbs a large amount of heat, thereby acting as a flame retardant. No other gaseous substances are released except water produced by decomposition. The chemical properties of magnesium oxide generated after decomposition are stable and no secondary pollution is produced. Magnesium oxide and hydrogen are oxidized into alkaline substances that can absorb SO 2 , NO x , and CO 2 , toxic and harmful gases produced by combustion. Reduce the harmful gas atmosphere at the fire scene. After various materials using magnesium hydroxide flame retardants are discarded, magnesium hydroxide can react with natural acids or acidic oxides to form magnesium salts and become magnesium fertilizers. Magnesium ions are an indispensable element for plant photosynthesis. Most of its magnesium salts have low solubility and are not easily lost.

2016 Paper from the China Flame Retardant Academic Annual Conference, Chengdu, Sichuan – 765 – Magnesium hydroxide does not cause harm during the production, use and disposal processes. It is a recognized environmentally friendly flame retardant and has the triple functions of flame retardant, smoke suppression and filling. Excellent flame retardant. It is widely used in rubber, chemicals, building materials, plastics and electronics, unsaturated polyester and paints, coatings and other polymer materials.

Aluminum series Flame retardants

The most valuable of the aluminum flame retardants is aluminum hydroxide, referred to as ATH. It is also an environmentally friendly flame retardant. Like magnesium hydroxide, it will not cause harm to workers or the environment during the entire process of production, use, and disposal. It also has the triple functions of flame retardant, smoke suppression and filling. However, the thermal decomposition temperature of aluminum hydroxide is 100°C lower than that of magnesium hydroxide, so it is not suitable for processing materials with higher molding temperatures. Aluminum hydroxide is undoubtedly an environmentally friendly flame retardant with excellent performance, and its usage accounts for a large sales share among inorganic flame retardants.

Hydrotalcite

Hydrotalcite materials are anionic layered compounds, referred to as LDHs, which are a type of inorganic functional materials with a layered structure. LDHs decompose when heated to about 200°C and lose interlayer moisture. When heated to 250~450°C, more moisture is lost and CO 2 is released. The water and CO 2 released by LDHs at 200~800 ℃ absorb thermal heat, reduce the concentration of combustion gas, and block

O 2, plays a flame retardant role. It is also an environmentally friendly flame retardant and is widely used in plastics, rubber, coatings and other fields.

Silicon system Flame retardants

Silicon flame retardants are divided into two categories: organic silicone flame retardants and inorganic silicone flame retardants. . Silicone flame retardants improve the flame retardant effect by improving the molecular structure of the polymer, increasing the molecular weight, etc., improving the char-forming properties and the processing and physical and mechanical properties of the flame-retardant materials.

The research on inorganic silicon-based flame retardants is mainly to improve its compatibility with the flame-retardant materials and increase the flame retardant efficiency. Inorganic silicon-based additives (such as silica ) are often used as fillers. Inorganic silicon compounds have good flame retardant effects whether used as additives for polymers or blends with polymers, but they are generally used in conjunction with other additives. Generally speaking, silicone flame retardants It is also an environmentally friendly flame retardant.

Others

As halogen flame retardants will eventually be launched on the market, developed countries are constantly developing new ones. For flame retardants, due to the existence of technical barriers, the chemical structure and composition of many products are often kept secret, and the use technology is also reserved. It is difficult to evaluate whether such products are environmentally friendly flame retardants.

Flame-retardant fabric produced in the city They all use environmentally friendly, green and safe flame retardant additives, and have passed international testing and certification, paying more attention to your safety and protection.

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