In response to the popular saying that “halogen-free is environmental protectionâ€, flame retardant industry experts have clearly put forward the idea that halogen-free is not synonymous with environmental friendliness at the 2012 annual meeting of the China Flame Retardant Society held in Xiamen. The general consensus of the industry. Zhou Zhengyi, the secretary general of the China Flame Retardant Society, proposed that all types of flame retardants should be treated scientifically. The development of new technologies and new products containing halogenated and non-halogen flame retardants must be balanced. It cannot simply be thought that halogen-free is environmental protection. Wang Yuzhong, a professor at Sichuan University and Hu Yuan, a professor at China University of Science and Technology, expressed the same view. These experts believe that judging whether or not the flame retardant is environmentally friendly is not necessarily linked to the presence of halogens. There are many kinds of flame retardants. If they are classified according to chemical elements, they can be divided into halogen-containing flame retardants and halogen-free flame retardants. Halogen-based flame retardants include bromine-containing or chlorine-containing flame retardants, of which organic bromine flame retardants are the main; halogen-free flame retardants include phosphorus, phosphorus-nitrogen, inorganic metal hydroxides (aluminum hydroxide Magnesium hydroxide, boron, silicon, molybdenum, etc. Different flame retardants have their own characteristics and play their respective advantages in different application fields. Some halogen-containing flame retardants play an irreplaceable role in specific fields. A large number of scientific experiments and research results show that most halogen-based flame retardants have no negative impact on the ecological environment and human health, and these flame retardants have long-term commitment to fire-retardant and fire safety; at the same time, some halogen-free flame retardants also It is not like some people emphasized that halogen-free is environmental protection. An obvious example is that in the relevant European regulations, certain halogen-free flame retardants themselves carry dangerous chemical labels, such as H400 and H410 are toxic in the aquatic environment. Dr. Han Songqing from Chemtura told reporters that from a technical point of view, halogen-free can not be used as a synonym for environmentally friendly flame retardants. It is the chemical structure rather than the element that determines the toxicological properties of the chemical. The true environmentally friendly flame retardant should be non-toxic or extremely toxic, difficult to enter biological tissues, or cause bioaccumulation and release to the environment. Fuel. In particular, when considering environmental protection, it should be regarded as a measure of the entire life cycle from the acquisition, production, use, and recycling of raw materials. Studies have shown that halogen-containing brominated flame retardants have an advantage in reducing carbon emissions over the entire life cycle. In addition, when we are concerned about whether a flame retardant is environmentally friendly, we cannot ignore its basic requirements as a flame retardant, that is, whether it can meet the requirements of fire prevention standards and regulations, and can meet other relevant regulations such as chemical regulatory regulations. Requirements, and whether it can meet the basic physical and mechanical properties of the product. Han Songqing emphasized that flame retardants are evaluated in individuals rather than families (such as bromine, phosphorus, or halogen-free). At present, the evaluation data and results of flame retardants available in the world provide sufficient selection basis for users. In particular, the commonly used brominated flame retardants have undergone various evaluations in the past and accumulated large amounts of data, which can be optimized for downstream users. Products provide scientific basis. Users can comprehensively consider factors such as efficacy, economy, and environmental benefits to make the best choice for their respective products. Many manufacturers and users of flame retardants also agree that halogen-free flame retardants are not equivalent to green environmental protection. Representatives of some large electronic product manufacturers in the world also stated that halogen-free flame retardants do have some deficiencies in certain application fields, as well as physical and mechanical properties and processing performance of products. In particular, at present, new electronic and electrical products are emerging in the world, the replacement and replacement speed is accelerated, the production volume and consumption continue to increase, and the usage of flame retardants is driven up. Consumers' requirements for product fire protection are also increasing. At the same time, the flame-retardant and safety standards in the world have become increasingly stringent, and the flame retardant performance of electronic and electrical products has attracted attention. High-efficiency, safe, and cost-effective flame retardants are increasingly sought after by the market. Therefore, they believe that both halogenated flame retardants and halogen-free flame retardants, environmental protection, low toxicity, high efficiency, and versatility should be the common development direction of flame retardants. Psa Nitrogen Generator,Nitrogen Generator,Liquid Nitrogen Generator Gas compressor Co., Ltd. , http://www.airpuris.com