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Research and development overview flame retardants


With dense urban architecture, lighter high-rise housing construction and building structures, synthetic polymer materials are widely used in various fields, closely related to people's lives, a direct impact on people's work and life. But in combustible, flammable, it is easy to cause material fires are mostly organic polymers, there is great potential fire hazard. Because the polymer material is ignited fires cause more frequent cases of fire retardant polymer materials have attracted people's attention. How to improve the flame retardancy of synthetic materials, to reduce the risk of fuel burn and release toxic gases when burned, reduce the loss of life and property of the people, has become a staff study. The researchers found that by adding flame retardant or the introduction of a group in the polymer material, can effectively improve the anti-flammable materials to prevent material and inhibit the spread of the flame is ignited by a chemical reaction. On this basis, the researchers around the world to conduct in-depth discussion flame retardant technology research, and developed a series of excellent flame retardant properties of the material. This is one of a flame retardant for fire-retardant synthetic materials, have a good flame-retardant effect. Now were discussed on flame development situation.

Type flame retardant

Fire science and technology in order to meet the needs of social production and life safety, prevent fires and protect people's lives and property and developed a science. Flame retardant technology is applied in real life, it is a combustible flammable materials used to improve the combustion performance of special chemical additives, are widely used in various types of decoration materials fire retardant processing. After the flame retardant material after processing, when subjected to external fire source attack, can effectively prevent, or terminate the flame propagation delay, so as to achieve the flame retardant effect. Depending on the criteria for the classification can be divided into the following categories retardants:

Retardant elements contained by 2.1 points:

Elements contained by fire can be divided into halogen flame retardants, phosphorus flame retardant, flame retardants nitrogen and phosphorus - halogen flame retardants, phosphorus - nitrogen flame retardants and other categories. Halogen flame retardants in the pyrolysis process, the decomposition of the combustion capture transfer radical X? And HX, HX can dilute combustible gas produced when fuel cracking, cut off contact with combustible gas and air. Phosphorus flame retardants produced phosphoric anhydride or phosphate in the combustion process, to promote fuel dehydrated carbonized, preventing or reducing the combustible gas produced. Phosphoric anhydride formed in the pyrolysis Shihai similar glassy melt covering combustible surface, prompting its oxidation to carbon dioxide, play a flame retardant. In the nitrogen-based flame retardant, a nitrogen compound and a fuel effect of promoting cross-linking into carbon, reduce the decomposition temperature of the combustible material, non-combustible gas produced, dilute the combustible gas effect. Phosphorus - halogen flame retardants, phosphorus - nitrogen phosphorus flame retardant mainly through - halogen, phosphorus - nitrogen achieve synergy effects retardant purpose, with phosphorus - halogen, phosphorus - nitrogen double effect, flame-retardant effect is better .

2.2 according to the different sub-components:

Inorganic flame retardants can be divided into different components, organic flame retardants and organic and inorganic flame retardants mixed three. Inorganic flame retardants is currently the most used a flame retardant, its main component is inorganic, application products mainly include aluminum hydroxide, magnesium hydroxide, monoammonium phosphate, diammonium phosphate, ammonium chloride, boric acid, etc. . The main group of organic flame retardant is divided into organic, the main products are halogen, phosphate esters, halogenated phosphate. There are some organic flame retardant durable fabric used in textile finishing, such as the six-bromine water dispersion, Deca - antimony trioxide flame retardant system, with flame retardant good wash resistant. The organic, inorganic hybrid inorganic-based flame retardant of the flame retardant is improved products, mainly non-water-soluble organic phosphate aqueous emulsion, partial replacement of the inorganic salt-based flame retardant. In the three categories of flame retardants, inorganic flame retardants with non-toxic, harmless, smoke-free, halogen-free, are widely used in various fields, the total demand accounted for more than half of the total demand for flame retardants, demand growth rate of growth.

2.3 points-per-use method:

By the use of different methods can be put into a flame retardant additive and reactive. Flame retardant mainly by adding flame retardants play a role in fuel flame retardants. Reactive flame retardant is introduced through a chemical reaction retardant groups in the polymer material, thereby enhancing the anti-flammable material, the material is ignited and play to prevent the spread of flame suppression purposes. In retardant type, flame retardant dominant use of relatively wide range, accounting for 85% of flame retardants, a reactive flame retardant is only 15%.

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