Preparation method for expansion type melamine hypophosphite fire retardant

Abstract

The invention relates to a preparation method for an expansion type melamine hypophosphite fire retardant. The preparation method comprises the following steps: adopting a water phase synthesis method, adding melamine and hypophosphorous acid with the molar ratio of 1:0.5 to 3 into water, stirring the mixture for reaction for 2 hours at 0 to 100 DEG C at a stirring speed of 300r / min, then carrying out the suction filtration and washing of the reaction product, and drying the reaction product for 3 hours at 150 DEG C to obtain the melamine hypophosphite fire retardant. The preparation method has simplicity, quickness, high efficiency, no halogen, environmental friendliness, low cost and high economic benefits. In addition, the prepared fire retardant has high phosphorus content, is a solid at room temperature, and has high thermal stability and high compatibility with high polymers. The fire retardant not only can be used for a polyolefin halogen-free fire retardation system, but also can be used for the halogen-free fire retardation of engineering plastics such as polyester, polyamide, and the like.

Description

technical field

[0001] The invention belongs to the field of preparation of intumescent flame retardants, in particular to a preparation method of intumescent melamine hypophosphite flame retardants. Background technique

[0002] Since the 1980s, flame retardants have become the largest additives used in synthetic materials next to plasticizers. With the development of the economy, people's awareness of environmental protection and safety has greatly improved, and they are more concerned about the ecological environment and the value of life. Traditional halogenated flame retardants are widely used in the production of flame retardant materials due to their high flame retardant efficiency. However, due to the combustion of halogen-based flame-retardant products, a large amount of smoke and toxic corrosive gases are produced, which hinders rescue and evacuation of personnel, resulting in secondary disasters. Therefore, the application of halogen flame retardant products is ...

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