Flame retardant masterbatch, also known as flame retardant masterbatch or fire-resistant masterbatch. It is a type of product that is produced to meet the fire protection requirements of plastic and rubber products.

1. Easy to use: Flame retardant masterbatch (masterbatch) is mostly in the form of sheet-like or strip-shaped tablet sized particles, which are exactly the same size as general plastic particles, improving their compatibility, making them easier to disperse and add, hygienic, and reducing volatilization waste.

2. Good compatibility with resin: In general, flame-retardant masterbatch (masterbatch) undergoes special treatment to improve its compatibility with plastic resin, making it less likely to cause delamination, frosting, patterns, and other problems even when added in large amounts to the resin.

3. Reducing costs and increasing product added value: The addition of flame-retardant masterbatch (masterbatch) often makes general plastics meet or approach the application requirements of engineering plastics, increasing product added value and reducing raw material costs.

Due to its advantages in flame retardant efficiency, environmental protection, improved production efficiency, convenience, and many other aspects, flame retardant masterbatch (masterbatch) has become an effective substitute for traditional flame retardants and has been widely used in various aspects of plastic granulation, extrusion, injection molding, etc.

At present, the flame retardant masterbatch that can be promoted and applied mainly includes halogen based (Br, Cl), phosphorus based (red phosphorus, phosphorus compounds, etc.), nitrogen based (usually referred to as expansion type flame retardant masterbatch), and inorganic flame retardant masterbatch (aluminum hydroxide, magnesium hydroxide, etc.).

Phosphorus based flame retardant masterbatch is also a widely used product, with flame retardant efficiency even higher than halogen based in some resins. However, it has many disadvantages such as poor color coordination, poor compatibility, low oxygen index, and low applicability to processing technology, and is often only adopted by special industries. Due to its low flame retardant efficiency and many discomforts such as easy foaming, the application range of expandable flame retardant masterbatch is even narrower. Inorganic flame retardant masterbatch, such as magnesium hydroxide.

Halogen based flame retardant masterbatch (masterbatch) is currently the most highly regarded flame retardant masterbatch in most resins. The reason is that its organic nature makes it have a better affinity with plastics, resulting in less mechanical performance degradation and high flame retardant efficiency of the finished product. The amount added to the resin is relatively small, and the cost-effectiveness is high. The disadvantage is that some of them have biological toxicity and are prohibited in some international standards. And due to poor environmental performance, especially in Europe, there is a trend of being eliminated.

Phosphorus based flame retardants are mostly liquid and are mainly used for plastics such as PU and PVC. The main disadvantages of small molecule phosphorus based flame retardants are high volatility and low heat resistance. Currently, efforts are being made to develop compounds and oligomers with high molecular weight. Firemacster836 is a halogenated phosphate ester containing phosphorus, bromine, and chlorine, with low viscosity, making it particularly suitable for use in casting products and PU soft foam plastics.

Its flame retardant products have good environmental friendliness, do not emit toxic gases, have low smoke emissions, and have a high oxygen index for flame retardant plastics. However, due to the high amount of additives required to meet the ideal flame retardant standards and the natural incompatibility between inorganic and organic substances, although the modified products are still difficult to meet the needs of most industries, their promotion is limited to some extent. I believe that with the advancement of its technology, relying on its environmental advantages, it can gradually be recognized by the market.

The multifunctionality of flame retardant and plasticizing, flame retardant and cross-linking is another major aspect of the development of phosphorus based flame retardants. Flame retardant plasticizers, especially those with low-temperature plasticizing effects, are mainly used in PVC products, such as domestically produced diisopropylbenzene phosphate. Flame retardant crosslinking agents are reactive phosphorus containing polyols that can be used not only as reactive flame retardants for PU, but also in combination with bromine based flame retardants in epoxy resins, greatly reducing the amount of bromine flame retardants used.