Do you know the advantages of red phosphorus flame retardant

There are many kinds of flame retardants, according to their composition can be divided into: organic flame retardants and inorganic flame retardants. Representative flame retardants are halogen, phosphorus and aluminum hydroxide, magnesium hydroxide and so on. Phosphorous flame retardant has the characteristics of self-release from fire, good dispersion, small amount of addition, good solubility and so on.

Red phosphorus flame retardant principle:

Red phosphorus forms phosphoric acid in the resin, which absorbs heat and prevents the oxidation of CO to CO2, hindering the heating process. The addition of additives containing phosphorus forms a thin glassy or liquid protective layer on the condensed phase, thereby reducing oxygen diffusion and heat and mass transfer between the gas phase and the solid phase, and inhibiting the carbon oxidation process.

The advantages of red phosphorus flame retardant are as follows:

1. Red phosphorus and other flame retardants, especially those based on metal hydroxides with strong heat absorption performance, can achieve higher flame retardant performance.

2. As a non-halogen flame retardant, red phosphorus is used in a variety of plastics, rubber and other materials (such as electronic equipment, TV shell, etc.), with low addition, good flame retardant performance, smoke free combustion, low price and other advantages.

3. Phosphorous flame retardants have been widely used for their advantages such as low dosage, no effect on material processing, high efficiency flame retardancy, little harm to the environment, low smoke and low toxicity. The flame retardancy mechanism of phosphorous based flame retardants was introduced. The research progress of four kinds of phosphorous based flame retardants, including red phosphorus, phosphate, phosphate ester and phosphonate ester, and their application in plastics and textiles were summarized. The future development trend of phosphorous based flame retardants was pointed out.

4. Red phosphorus is an inorganic substance, which has a lower cost advantage. Because of its high flame retardant efficiency, low cost and halogen free, red phosphorus has been used in the domestic market in recent years. Can be widely used in a variety of resin, unsaturated resin, hot melt adhesive, rubber, paint and other products flame retardant.

With the development of new technology, researchers have made a breakthrough in color by using capsule coating technology, using different capsules, and adopting multiple coating technology. The whitened red phosphorus on the coated surface has been realized, which basically overcomes the problems of easy moisture absorption and oxidation of red phosphorus, and also breaks through the limitations of color. Also known as whitening red phosphorus flame retardant, will usher in new development opportunities.