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[Chemical Knowledge]：Production process and preparation method of halogen-free flame retardant.

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Halogen-free flame retardant is an environmentally friendly flame retardant, which can prevent fire while not emitting harmful substances. At present, with the improvement of environmental awareness, halogen-free flame retardants have become a new trend in the development of the market. This article will introduce the production process and preparation method of halogen-free flame retardants.

1. halogen-free flame retardant production process

1, procurement of raw materials: procurement of raw materials should be in line with environmental requirements, for example, aluminum hydroxide, polyester resin, epoxy resin, phosphate and so on.

2. Preparation: The raw materials are added to the reactor according to a certain proportion, and the complex reaction operation is carried out. After a series of steps such as stirring, heating, cooling, drying, etc., the halogen-free flame retardant product is finally obtained.

3. Testing: The finished halogen-free flame retardant products need to be tested and tested to ensure that the products meet the relevant national or industry standards and ensure the stability and consistency of product quality.

2. halogen-free flame retardant preparation method

1, aluminum hydroxide: aluminum hydroxide is an important material for the preparation of halogen-free flame retardants. It can be obtained by reacting aluminum powder with water.

2. Phosphate: Phosphate is also an important raw material for the preparation of halogen-free flame retardants. The most commonly used are red phosphorus and ammonium dihydrogen phosphate. They can be obtained by the reaction of deoxygenated glutaric acid and sulfuric acid, or by the reaction of nitric acid and ammonium hydroxide.

3, polyester resin and epoxy resin: Polyester resin and epoxy resin are also the main raw materials for the preparation of halogen-free flame retardants. They can be obtained by chemical synthesis, the specific method is the corresponding monomer in the role of catalyst polymerization reaction.

4. Preparation process: the above raw materials are mixed according to a certain proportion, stirred evenly, and then heated for reaction to convert them into fine granular finished products. Finally, the prepared halogen-free flame retardant was obtained through the process of screen sorting, cooling and waterproofing.

In general, the production process and preparation method of halogen-free flame retardants are more complicated, and certain chemistry and process technology are required. At the same time, environmental protection and safety also require special attention to ensure product quality and safety. In the future, with the deepening of the concept of environmental protection, the development prospects of halogen-free flame retardants will be broader.