With the needs of China's economic development along with engineering plastics, the application of modified plastics has become popular. As an important variety of plastic rubber additives, flame retardants are increasingly used. Demand is increasing.
Flame retardants are classified into halogen type, phosphorus type, halogen-phosphorus type, nitrogen type, silicon type, aluminum-magnesium type, etc. according to chemical structure, and are classified into inorganic flame retardant, organic flame retardant and polymer block according to chemical structure. The fuel is divided into an additive flame retardant and a reactive flame retardant according to the relationship between the flame retardant and the flame retardant material.
Halogenated flame retardants are one of the most widely used flame retardants in current production. The flame retardant mechanism is mainly caused by the decomposition of the flame retardant when the flame retardant material is burned to release hydrogen halide, and the hydrogen halide captures and transmits the combustion chain or free radicals, and generates less active halogen radicals to slow down or stop the combustion, halogenation. Hydrogen and halogen radicals generated during combustion have non-volatility and low mobility, and it is easy to dilute oxygen on the surface of combustion, which is also beneficial to prevent combustion. There are nearly 100 kinds of commonly used varieties in the market. Including decabromodiphenyl ether, tetrabromobisphenol A, octabromoether, decabromodiphenylethane, tetrabromoether, brominated polystyrene, hexabromocyclododecane and chlorinated paraffins, clones, CPE, etc. .
Halogen flame retardants are mainly used in thermoplastics and thermosetting resins. The use of flame retardants in thermoplastics is brominated decabromodiphenyl ether, decabromodiphenylethane, octabromodiphenyl ether, brominated polyphenylene. Ethylene and other main products, halogen flame retardants have high flame retardant efficiency, moderate price, little 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 retardant of plastic products in the fields of electronics, automobiles, construction, packaging, spinning, etc., due to the demanding mechanical properties of materials, halogen flame retardants are almost unique. Halogenated decabromodiphenyl ether, decabromodiphenylethane, tetrabromobisphenol A, etc. also have extraordinary performance in flame retardant thermosetting resins, but there is a tendency to be replaced by inexpensive inorganic flame retardants and phosphorus systems.
Phosphorus-based flame retardants mainly include red phosphorus, phosphates, phosphorus oxides and bromine arene phosphates. Among them, red phosphorus is the most widely used. Including thermosetting and thermoplastics and fabrics, adhesives, etc. Its flame retardancy is mainly reflected in the flame-retardant mechanism of condensed phase. The red phosphorus is elemental phosphorus, and the flame retardant efficiency is relatively high. Normal red phosphorus is easy to spontaneously ignite even in the air, and must be coated before it can be used. The performance of flame retardant products is not high. Phosphorus compounds are mostly liquid, and the process is complicated and often contains certain toxicity, and the application is limited to some extent.
The most widely used varieties of inorganic flame retardants are magnesium hydroxide and aluminum hydroxide. White, non-toxic powder. Dehydration after heating acts as a flame retardant, and can be used as a flame retardant when the purity is high. After special processing, the particle diameter can reach the micron level. It is widely used in rubber flame retardant. Generally, the V0 grade flame retardant standard addition amount is 40%-70%, and the excessive addition amount objectively fills the material. Application in thermoplastics may result in significant signs of brittleness and a significant decrease in performance. Generally need to be used together with other flame retardants.
Nitrogen-based flame retardants mainly include tripolyamine and its salts, dicyandiamide, strontium salts and the like. The commercial varieties are mainly triamine and its salts. Including MC, MA, etc., by decomposing endothermic heat and generating incombustible gas to dilute combustibles, it plays a prominent role in engineering plastics. When the amount of addition is low, the effect is not very obvious, and the compatibility with resin is not as good as that of bromine. There are not many domestic commercial varieties.
Silicon-based flame retardants are mostly cross-linked flame retardant mechanisms, subject to price and technology constraints, and currently there are not many commercial varieties.
Other inorganic flame retardants such as antimony trioxide, zinc borate, ferrocene and the like have almost no flame retardancy, and their flame retardancy is generally used in combination with a halogen-based flame retardant to act as a synergist. It is often possible to greatly increase the flame retardant efficiency of other flame retardants.
An extended variety of flame retardants - flame retardant masterbatch. Flame-retardant masterbatch is also known as flame retardant masterbatch, flame retardant masterbatch, fireproof masterbatch, etc. Generally, it is a tablet-sized granule, and often has a plurality of flame retardant components compounded to be mixed, plasticized, extruded, and granulated by a twin-screw or three-screw extruder. It was originally designed to solve the problem that the flame retardant powder is easy to produce dust pollution and uneven dispersion during use. After years of development, flame retardant masterbatch has formed a variety of plastic rubber additives and formed an industry. Its function has been strengthened more and more, not only solves the problem of dust pollution and uneven dispersion, but also its flame retardant efficiency, compatibility with resin, adaptability to the process has been further improved, and even other can be given as needed. Function and cost advantages are gradually reflected, saving the cost of equipment, research and development, production, procurement and extra waste for flame retardant products manufacturers. The use of flame-retardant products companies to concentrate on doing advantageous industries is conducive to the modularization and large-scale production of enterprises.
In 2006, Boida launched a superior product for the market - high-efficiency flame retardant masterbatch. Adapted to polyolefin and styrene plastic flame retardant respectively. Since its launch, it has been enthusiastically recognized by the market. Its environmental protection, high efficiency of flame retardant, excellent mechanical properties of flame retardant products, excellent weatherability, suitability for the process, and economical cost of use have been highly praised by most customers. It has been applied in flame-retardant wire harness corrugated pipe, polypropylene spinning, plastic hollow board, electrical injection molded parts, plastic film, and automotive interior parts. Companies adhering to the rigorous, responsible, realistic and efficient corporate style, in good faith, mutual benefit, truth-seeking, development attitude and exchanges and cooperation with colleagues from all walks of life.
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