Inorganic flame retardants for flame retardant tapes: generally refer to inorganic compounds that are added to the formulation of polymers and have flame retardant or smoke suppression effects. The main components are hydroxide (aluminum hydroxide, magnesium hydroxide), red phosphorus, tin series, borate (zinc borate). Advantages and disadvantages of inorganic flame retardants Advantages: In addition to the effect of flame retardant, inorganic flame retardants also have the effect of suppressing smoke and can inhibit the formation of hydrogen chloride. Due to the non-toxicity and non-corrosiveness of inorganic flame retardants, they are widely used. In today's increasingly stringent environmental protection requirements, inorganic flame retardants show strong competitiveness and development potential. Disadvantages: Inorganic flame retardants generally have relatively low flame retardant performance and large amount of addition.
Flame retardant, tape halogen-free flame retardant: halogen-free flame retardant does not contain halogen, and the flame retardant effect is good. Halogen-free flame retardants are mainly based on phosphorus-based compounds and metal hydroxides. These two types of compounds do not volatilize and produce no corrosive gas during combustion, and are called pollution-free flame retardants. In addition, there are several new types of halogen-free flame retardants such as silicon-based flame retardants and nitrogen-based flame retardants. These new halogen-free flame retardants have become new products in line with the development trend of international standards for flame retardants.
Differences: 1. Inorganic flame retardants do not contain carbon and its carbon compounds. 2. The inorganic flame retardant may contain halogen elements. 3. Halogen-free flame retardants are flame retardants that do not contain halogens. Halogen-free flame retardants are both halogen-free and inorganic. Inorganic flame retardants are aluminum hydroxide, magnesium hydroxide, red phosphorus, and expandable graphite. Halogen flame retardants are Refers to halogen-containing polymers or flame-retardant mixtures combined with halogen-containing flame retardants, mainly including antimony trioxide and decabromodiphenyl ether, which are often referred to as bromine-antimony flame retardants, bromine-antimony flame retardants It has excellent flame retardant properties and has been widely used as a olefin-resistant material. However, when a fire occurs, such materials made with halogen-containing flame retardants will generate a large amount of smoke and toxic corrosive hydrogen halide gas when heated, causing secondary hazards.
In February 2003, the European Union promulgated two directives, WEEE and RoHs. WEEE is a directive on recycling waste electrical and electronic equipment, and rohs is a directive on the restriction and prohibition of the use of certain toxic and hazardous substances and elements in electrical and electronic equipment. In August 2004, these two directives were converted into laws (regulations) of the 15 EU member states. Western Europe has begun to implement new flame retardant classification methods and test standards in wire and cable, building materials, coatings and other industries. China has also begun to submit national standards for the flammability grades of building materials and products. China's flame retardant performance grades and national standards have many of the same characteristics as the new standards in Western Europe, that is, the flame retardant performance is judged by emphasizing the fire development rate, heat release rate, smoke generation, and the corrosiveness and toxicity of combustion products. standard. In order to pass these new standards, the traditional halogen-based flame retardant materials such as antimony trioxide will be powerless.
Inorganic flame retardant (inorganic flameretardnat) is composed of high temperature resistant solution and fine processing of ultrafine inorganic metal oxide. Inorganic flame retardants mainly add inorganic elements with intrinsic flame retardancy to the flame-retardant substrate in the form of simple substances or compounds, fully mix them with high polymers in a physically dispersed state, and pass chemical or Physical changes act as flame retardants. The wood flame retardant elements developed and researched mainly include metal Mg, Al, Ca, non-metal B, Si, N, P, Sb, halogen and transition elements Mo, V, Fe, etc. Inorganic flame retardants mainly include metal hydrates , red phosphorus, boron compounds, antimony compounds, etc. Inorganic flame retardants have the characteristics of good thermal stability, non-volatile, long-lasting effect and low price, and are widely used.
