Composition and criterion of flame retardants

At present, there are mainly organic and inorganic, halogen and non halogen.

The components of the flame retardant:

Organic flame retardant with bromine, nitrogen and phosphorus and its compounds represented some flame retardants,

Inorganic is mainly three oxidation of antimony, magnesium hydroxide, aluminum hydroxide, silicon and other flame retardant system.

1. Bromine system:

Brominated flame retardants occupy an absolute advantage in organic flame retardants. Although there are many "disagreements" on environmental issues, it is difficult for them to replace other flame retardants.

Two, red phosphorus:

In the non halogen flame retardant, red phosphorus is a good flame retardant, has added advantages of small quantity, high flame retardant efficiency, low smoke, low toxicity and wide use etc..

The use of red phosphorus and aluminum hydroxide, expanded graphite and other inorganic flame retardants, made of composite phosphate / magnesium, phosphorus, phosphorus / aluminum / graphite and other non halogen flame retardant, can greatly reduce the use of flame retardant dosage, so as to improve the plastic products processing properties and physical mechanical properties.

But ordinary red phosphorus are easily oxidized in air, moisture absorption, easy to cause the dust explosion, transportation difficulties, and polymer poor phase defects, the application scope is limited.

To find a balance between fire protection and environmental protection is an important node for the development of flame retardant products in the future. The importance of flame retardants in modern society can not be ignored, but with the introduction of a series of environmental policies in Europe, the development and application of the flame retardants have been limited to varying degrees. How from the fire threat at the same time in the protection of persons and property, but also can make the potential hazard of flame retardant on the human body and the environment are reduced to a minimum, is the common focus of domestic flame retardant production enterprises, research institutions and downstream of electronic and electrical, building materials, transportation and furniture industry. :

Six bromo ring twelve alkane is mainly used for polystyrene insulation board on the back coating of textile materials in construction engineering. At present, the human health and environment part of the EU risk assessment is still in progress. The European Union funded endocrine disorder chemical study found that six brominated twelve alkane and four brominated bisphenol A did not cause concern. The conclusion of the comprehensive risk assessment of the effects of flame retardants on endocrinology also showed that the general health and toxicity parameters (behavior, survival, growth speed, and the quality of related liver and gonad) of six bromo cyclic twelve alkane and four bromo bisphenol A were not affected.

At present, four kinds of flame retardant (TCEP, TCPP, TDCP and V-6) are being used for the EU risk assessment and are mainly used in polyurethane foam. The European Union's risk assessment for TCEP has been completed, and it needs to be announced. The risk assessment of human health and environment for TCPP, TDCP and V-6 is still in progress. At the same time, more tests and data collection are also being carried out. Some of the risk assessments are expected to be completed in 2006, while other assessments will be completed in 2007. Sb2O3 is used as an synergist for halogenated flame retardants or elastomers. At present, the human health and environment part of the EU risk assessment is still in progress. A new discussion on the human health part was carried out in June this year, and the environmental part is expected to be completed by the end of the year.

Any kind of chemical substances will be on the human body and the environment to There are both advantages and disadvantages., while avoiding disadvantages, the key is how to manage and use correctly, for the application of flame retardants is such. We should be based on the conclusion of risk assessment, and in a scientific manner, let the flame retardants play their due role in ensuring the safety of human life and property. The Ministry of public security will come into force next year - fire retardant standards for fire retardant products in public places. The standard of fire performance and labeling for flame-retardant products and components in public places, which is formulated by the Ministry of public security, will be formally implemented at the beginning of next year, which requires higher requirements for the flame-retardant properties of plastic products. The standard is formulated by the Ministry of public security in order to effectively control casualties and property losses caused by fire in public places. It is managed by the National Fire Protection Standardization Technology Committee sub committee of fire protection materials. This standard defines public places with flame retardant products and components, the definition and classification of combustion, performance requirements and marking, the provisions of the building products, public places the use of paving materials, wire and cable, socket, switch, lamps, household appliances and other plastic products and the use of shell seat, sofa, mattress in the insulation layer combustion performance and foam, put forward corresponding requirements of flame retardant grade standard.