Classification of Polycarbonate Flame Retardants

Polycarbonate itself has a certain flame retardancy, but it is difficult to meet the needs of downstream industries with high requirements for flame retardancy, so flame-retardant modification must be carried out. PC flame retardant is an auxiliary product specially used in the field of polycarbonate flame retardant modification.

Common PC flame retardants mainly include bromine-based flame retardants, phosphorus-based flame retardants, silicon-based flame retardants, boron-based flame retardants, and sulfonate flame retardants. Among them, phosphorus-based flame retardants are toxic and prone to yellowing, silicon-based flame retardants are expensive, boron-based flame retardants have weak flame-retardant effects, and their application ratios are small; brominated flame retardants have higher flame-retardant efficiency , the price is low, and the proportion of application in the market is relatively high in the early stage, but a large amount of toxic gas will be generated during the combustion process, which will pose a threat to human life, health and safety as well as the environment. At this stage, the proportion of application is declining.

Sulfonate flame retardants have high flame retardant efficiency, low dosage, low impact on product transparency, and excellent environmental protection. They can be compounded with other flame retardants to form high-performance flame retardants. As the market continues to increase the performance and environmental protection requirements for PC flame retardants, the proportion of global sulfonate flame retardant applications continues to increase. Sulfonate flame retardant product types mainly include EF-42, KSS, PPFBS, STB, HES, etc.

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