What are the common misunderstandings in the use of tribromonepentanol

Among the halogen-free flame retardants, red phosphorus flame retardant is a better flame retardant, which has the advantages of small addition amount, high flame retardant efficiency, low smoke, low toxicity, and wide application. When red phosphorus is used together with inorganic flame retardants such as aluminum hydroxide and expandable graphite, composite halogen-free flame retardants such as phosphorus/magnesium, phosphorus/aluminum, phosphorus/graphite can be prepared, which can greatly reduce the amount of flame retardants. Improve the processing performance and physical mechanical properties of plastic products. However, ordinary red phosphorus is easy to oxidize and absorb moisture in the air, easily cause dust explosion, difficult to transport, and poor solubility with polymer materials, so its application range is limited. In order to make up for this shortcoming, the microencapsulation process can be used to prepare microencapsulated red phosphorus. Microencapsulated red phosphorus not only overcomes the inherent shortcomings of red phosphorus, but also has the advantages of high efficiency, low smoke, and no toxic gas. Its dispersibility, physical and mechanical properties, thermal stability and flame retardancy have been improved and enhanced.

Misunderstanding 1: The more the amount of flame retardant, the better the flame retardant effect

Limiting oxygen index (LOI) and UL-94 test results show that the flame retardant performance of the material is related to the amount of flame retardant. As the amount of flame retardant increases, the flame retardant effect first increases and then decreases. Adding too much flame retardant has a great influence on the mechanical properties of the material.

Misunderstanding 2: Brominated flame retardants are harmless to humans and the environment

There are more than 70 brominated flame retardants. After strict evaluation, most of them are harmless to human body and environment. However, some brominated flame retardants with certain structures will form dioxins under certain conditions (such as incomplete combustion). Dioxins include 210 compounds, which are very stable and have a high melting point. They are difficult to dissolve in water and can be dissolved in most organic solvents. They are colorless, tasteless, and fat-soluble substances, which are easy to accumulate in the body and cause serious harm to the human body.

Misunderstanding 3: The higher the flame retardant grade, the better

Different applications have different requirements for flame retardancy. Generally speaking, people always hope that the flame retardant grade of the material is higher. But in fact, various flame retardant test methods have their limitations, and the conclusions are relative. For example, UL94V-0 is better than V-2. However, some electrical products require materials to have arc ignition resistance, and V-2 is better than V-0. Because 94v-2 plastic will not form electrical conductivity and coking under the action of electricity, this greatly reduces the possibility of fire, while 94v-0 plastic is just the opposite.

Misunderstanding 4: PP flame retardant is the same as flame retardant masterbatch

Polypropylene flame retardant is a powder suitable for modification and granulation. It needs to be compounded with other synergists for formulation design. PP flame retardant masterbatch refers to the concentrated masterbatch compounded with flame retardant. Using carrier and composite flame retardant, twin-screw granulation. It can be a directly processed product or pellets.