At present, the industry is focusing on the development of new low-toxicity, low-smoke, non-polluting flame retardants and fire-retardant materials.


1. Intumescent fire retardant material agent

In the 1980s, Professor G. Camino of Italy carried out a series of research work to establish and improve the use of phosphorus,

The theory of nitrogen-themed intumescent flame retardant systems and flame retardant mechanisms.

Intumescent flame retardant is a new type of composite flame retardant that has attracted wide attention in the industry in recent years. It has a unique flame retardant mechanism and halogen-free,

Low smoke and low toxicity. The flame retardant system is mainly through the synergistic effect of the "three sources" of acid source, carbon source and gas source,

When burning, a dense porous carbon foam layer is formed on the surface of the material, which can prevent the further degradation of the inner polymer and the release of combustibles to the surface.

It can also prevent the transfer of heat source to the polymer and isolate the oxygen source, thereby preventing the spread and spread of the flame.


2. Silicon fire retardant material agent

Silicon-based flame retardants improve the flame retardant properties of materials and also impart other properties. such as silicon-based aerogels,

It has both flame retardant properties and good thermal insulation properties, and has good application prospects in building thermal insulation materials.

Another example is that POSS flame retardants have good application prospects in high-end defense materials. Figure 12 shows two typical chemical structures of polyhedral silsesquioxane (POSS).

Polyhedral silsesquioxane (POSS) is a unique class of silicone flame retardants, which can exhibit excellent flame retardant, mechanical and thermal properties at very low dosage.


3. New nano fire retardant material agent

The use of nanotechnology to develop nano-scale flame retardants, such as nano-layered double hydroxide, has the advantages of high purity, ultra-fine particle size, and good flame retardant performance.

High-end nano flame retardant materials can be used in the aerospace field, such as the space suits worn by the Shenzhou astronauts, which are fireproof and radiation resistant.

High strength, high temperature resistance, good comfort, and excellent comprehensive performance.


4. High molecular polymer fire retardant material agent

The molecular weight of polymer flame retardants is large, and the macromolecules are not easy to bioaccumulate, which is beneficial to health and environmental protection.

Moreover, polymer flame retardants are used in conventional synthetic polymer materials, and will not migrate and precipitate, and will not be hydrolyzed and degraded.

Excellent aging resistance and water resistance, it is a hot spot in the development of flame retardant industry. In Figure 16, although the butadiene styrene brominated copolymer contains halogen,

However, it is an environmentally friendly high molecular polymer flame retardant, which has attracted widespread attention.


5. Essential fire retardant materials

Different from the flame retardant properties imparted to the material by externally adding flame retardants, the intrinsic flame retardant material itself has excellent flame retardant properties.

The most popular intrinsic flame retardant fibers currently researched include:

At present, many special intrinsically halogen-free flame retardant polymer materials are foreign DuPont, Teijin, Toray, Bayer, Wu Yu, Evonik,

Companies such as BASF occupy a dominant position, the domestic industry lacks the right to speak, and many key materials are even strictly sealed from China abroad.

China's flame retardant industry, which has a history of flame retardant for 5,000 years, still has a long way to go for its future development.


Polyparaphenylene benzobisoxazole (PBO), polybenzimidazole (PBI), melamine fiber (Basofil), polyphenylene sulfide (PPS),

Polyetheretherketone (PEEK), polyamide-imide (Kermal), phenolic fiber (Kynol), meta-aramid fiber, aramid fiber, polyphenylene sulfide,

Acrylic polyvinyl chloride, intrinsic flame retardant nylon, polyaromatic oxadiazole (POD), high-strength flame retardant vinylon, polyimide (P84), pre-oxygenated silk, carbon fiber,

Flame retardant seaweed fiber, basalt fiber, silicon carbide fiber, etc.

At present, the industry has paid more attention to halogen-free intrinsic flame retardant polymers containing all aromatic heterocycles, silicon, boron, phosphorus and nitrogen, and metals.

The flame retardant and environmental protection properties of halogen-free intrinsic flame retardant polymer materials have reached a new height.

For example: Hangzhou Xiangjun Textile Flame Retardant Technology Co., Ltd. uses phosphorus-containing copolyester to achieve permanent flame retardancy of textiles. Compared with the use of blending, padding,

Flame-retardant textiles with pre-treatment and post-finishing such as coating, its products are environmentally friendly, halogen-free, durable and flame-retardant, and are widely used.