With the needs of China's economic development along with engineering plastics, the application of modified plastics is popular. As an important variety of plastic rubber additives, flame retardants are also increasingly used. Demand continues to increase.
Flame retardants are divided into elemental types: halogenated, phosphorus, halogen-phosphorous, nitrogen, silicon, aluminum-magnesium, etc. According to the chemical structure is divided into inorganic flame retardants, organic flame retardants, polymer resistance Fuels, etc., are classified into additive flame retardants and reactive flame retardants according to the relationship between flame retardants and flame retardant materials.
Halogen-based flame retardants are one of the most widely used flame retardants currently produced. The flame-retarding mechanism is mainly caused by the flame retardant decomposing and releasing the hydrogen halide when the material added with the flame retardant is burned, the hydrogen halide capturing and transferring the combustion chain or the free radicals, generating the halogen halide with lower activity to slow or stop the combustion, and halogenating Hydrogen and the halogen radicals generated during combustion have non-volatile and low migration properties, which easily dilute the oxygen on the burning surface and thus also help to prevent combustion. There are currently nearly 100 kinds of commonly used varieties in the market. Includes decabromodiphenyl ether, tetrabromobisphenol A, octabromo ether, decabromodiphenyl ethane, tetrabromo ether, brominated polystyrene, hexabromocyclododecane and chlorinated paraffin, cloned, CPE, etc. .
Halogen flame retardants are mainly used in thermoplastics and thermosetting resins. The flame retardants used in thermoplastics are bromine decabromodiphenyl ether, decabromodiphenyl ethane, octabromodiphenyl ether, brominated polystyrene. Ethylene, etc. mainly halogen flame retardant with high flame-retardant efficiency, moderate price, small impact on the performance of flame-retardant products, good compatibility with plastics, easy to use and many other advantages. Therefore, it is favored by the market. In the flame-retarding of plastic products in electronic appliances, automobiles, construction, packaging, spinning and other industries, due to the strict requirements on the mechanical properties of materials, halogen-based flame retardants are almost unique. Halogenated decabromodiphenyl ether, decabromodiphenyl ethane, tetrabromobisphenol A, and the like also have remarkable performances in flame-retardant thermosetting resins, but they have been replaced by inexpensive inorganic flame retardants and phosphorus.
Phosphorus-containing flame retardants include red phosphorus, phosphate esters, phosphorus oxides, and bromoarene phosphate esters. Among them, red phosphorus is the most widely used. Including thermosetting and thermoplastic plastics and fabrics, adhesives and so on. The flame retardancy is mainly reflected in the condensed phase flame-retardant mechanism, red phosphorus is an elemental phosphorus, and the flame retardant efficiency is relatively high. Ordinary red phosphorus is easily ignited even in the air and must be coated before it can be used. In addition, its color is difficult to coordinate. , Flame retardant products performance is not high. Phosphorus compounds are mostly liquid, the use of complex processes and often contain some toxicity, the application is limited to a certain extent.
The most widely used inorganic flame retardants are magnesium hydroxide and aluminum hydroxide. White, non-toxic powder. Dehydration after heating plays a role in flame retardant, and it can be used as a flame retardant when the purity is high. After special processing, the particle diameter can reach micron level. It is widely used in rubber fire retardant, generally reaching the V0 level flame retardant standard addition amount of 40%-70%, and the excessively high addition amount plays a filling role to the material objectively. Applications in thermoplastics may cause the product to show signs of brittleness and significantly degrade performance. It is generally required to use together with other flame retardants.
Nitrogen-based flame retardants include trihydramine and its salts, dicyandiamide, and guanidine salts. The commercial varieties are mainly trimeramine and its salts. Including MC, MA, and so on, through the decomposition of endothermic and inflammable gas generated dilute combustibles to play a role in the performance of relatively prominent in engineering plastics, the effect is often not very obvious when the amount is low, the compatibility with the resin is not as good as bromine, Domestic commercial varieties are few.
Silicon-based flame retardants are mostly cross-linked flame-retardant mechanisms, subject to price and technology constraints, there are not many commercial varieties.
Other inorganic flame retardants such as antimony trioxide, zinc borate, ferrocene, etc. have almost no flame retardancy in themselves, and their flame retardancy is generally reflected in compatibility with halogen-based flame retardants and plays a role as synergistic agents. It can often greatly improve the flame retardant efficiency of other flame retardants.
Flame retardant extension - flame retardant masterbatch. Flame retardant masterbatch also known as flame-retardant masterbatch, flame retardant masterbatch, fire masterbatch and so on. Generally, it is a tablet-sized granule, which is often compounded with a variety of flame retardant ingredients, and then mixed, plasticized, extruded, and pelletized by a twin-screw or triple-screw extruder. It was originally designed to solve the problem that the flame retardant powder would easily generate dust pollution and uneven dispersion during use. After the development of flame-retardant masterbatch over the ages, a variety of plastic rubber additives have formed and formed an industry. Its functions have been increasingly strengthened, not only solving the problem of dust pollution, uneven dispersion, but also its flame-retardant efficiency, compatibility with the resin, and adaptability to the process have been further improved, and can even be given to other The function and cost advantages are gradually reflected, which saves the cost of equipment, R&D, production, procurement, and additional waste for flame-retardant product manufacturers. There are companies that use flame retardant products to concentrate on doing advantageous industries and are conducive to modularization and large-scale production.
Boiyada Company launched a superior product for the market in 2006 - high-performance flame-retardant masterbatch. Adapt to polyolefin and styrenic plastic flame retardant respectively. Since its launch, it has received enthusiastic approval from the market. Its environmental protection, high flame-retardant efficiency, excellent mechanical performance of flame-retardant products, excellent weather resistance, suitability for the process, and economical use cost have been highly praised by most customers. In flame-retardant wire harness bellows, polypropylene spinning, plastic hollow board, electrical injection molded parts, plastic film, automotive interior parts have been applied. Companies adhering to the rigorous, responsible, realistic and efficient corporate style, in good faith, mutual benefit, truth-seeking, the attitude of development and all walks of life colleagues exchanges and cooperation.
Suzhou D.Y. Apparels Accessory Co., Ltd. , https://www.dyapparels.com