Development and Status Quo of Boron Flame Retardants

The development and current status of boron flame retardants Lin Miao Zheng Limin School of Chemistry and Chemical Engineering, Donghua University 200051 The flame retardant finishing flame retardant boron fabric.

The flame-retardant finishing of textiles began as early as 300 years ago, and the curtains of fire-retardant finishing institutes were prevented from catching fire at the end of this month. The French chemicalists had discovered that the ammonium salts of sulphate acid or phosphoric acid could be used as Hemp and fabrics have flame-retardant properties, but their work can be regarded as a pioneer in flame-retardant finishing. In 1735, Yingtan's 1 ton was patented. He used an aqueous solution of borax Mingxi iron sulfate as a textile resistance. Burn finishing agent, this flame-retardant method can reduce the fire performance and combustion of the fabric. Therefore, inorganic boric acid and borate are the two oldest flame retardants. They are mainly used in cellulose fiber, such as cotton. And the flame retardance of paper due to the washing fastness, their application on the fabric has been limited. However, it has been reported that the combination of inorganic boron flame retardant and resin to form a flame-retardant finishing system will increase its durability! Although many new types of permanent flame retardants are currently used in the flame retardant finishing of cotton fabrics2, their applications are relatively limited due to their complex system composition and their low price and safety. Many factors, such as the manufacturer's commercial profits, have led to the permanent finishing of cotton fabrics that are more difficult to apply than non-permanent ones! Inorganic boride as a non-permanent finishing agent is very convenient to handle, that is, the fabric can be used after impregnation and drying. All important indexes of flame retardancy, including smoldering flame and carbonization length, can reach a certain level, and the economy is non-toxic. Therefore, the fabrics with little or no washing or no washing can be treated. Therefore, comprehensive latest information finds that borax boric acid boric acid Inorganic boron flame retardants such as salt have so far occupied a place in the huge flame retardant market. At present, organic synthetic materials have been widely used in transportation and construction materials, electrical appliances, household appliances, interior furniture, and people’s clothing. In various fields, it can replace steel wood wool yarns, deterring human muscles in economic construction and people's lives, so inorganic boride as a flame retardant is no longer limited to the finishing of cotton fabrics, it has been widely used 6 Unsaturated Polyester Nylon Thin Moon Good 1 teaspoon flammable 1316! 0 As produced dehydrated zinc borate, 87, high thermal stability, can be used in 290, processing engineering plastics inflated wire and cable and aircraft 30, especially suitable for expansion Coatings The company also developed ultra-fine zinc borate for fibers to improve material processing and component dispersibility. Another major producer of borides is the Americans' elbow people. , 18,1 field, the company launched in recent years, higher-temperature stage zinc borate to wither; 233, can be used for a variety of engineering plastics; another kind of a fine particle size zinc borate, 467, average particle size of 1.52.0! The company's development of anhydrous zinc borate will be applied to thermal engineering materials. 1 Organic boron compounds called flame retardants are gradually attracting attention. 9 In fact, attention to organic boron compounds is not as early as in recent years. In 1942, Midea 1 applied for a patent. He called the reaction product of boric acid and ethanolamine as a flame-retardant finishing agent for textiles, and subsequently reported that the flame-retardant properties of almost 50 organic boron compounds were correctly valued, although some of them were organic boron. Compounds have good flame retardancy, but the wash fastness is very poor, they can not even withstand water washing under sub-mild conditions, and those with boron cut-off bond, with benzene ring boron nitrogen bond, borazine Classes, halogenated arylboronic acid-based organoboron compounds are considered to have better hydrolytic stability and have excellent development prospects. Fireproof flame retardants developed by Nishizaka Textile Dyeing Co., Ltd. are special composites containing boron. Made 12. Infiltrate into cellulosic or chemical fiber grey fabric, can significantly raise the ignition point of the fiber, and significantly delay the spread of the flame. The main cause of death in fire accidents is the formation of gas from the combustion products, but the series is a new type of fire prevention yang. The fuel, which can be attached to the fibers through processing, inhibits the generation of fiber burning. This project is funded by the Shanghai Education Commission Youth Fund for the development and current status of boron-based muscle fuels. The changes in color tone, the public 4 commercialization of this research results. Red formal agency test. It is well known that they have a fire-retardant flame-retardant effect that has not been known in the past. Most of the excellent phosphorus-containing flame retardants require the use of a compound containing nitrogen or halogen, that is, a synergist, in order to improve the flame retardant effect. 13 Organoboron compounds as flame retardants There is also such a synergistic effect. After 1983, the Soviet Union synthesized the following flame-retardant polyglycolactams. After 8 treatment, the flame-retardant properties measured by the limiting oxygen index method were significantly changed, and the proportion of molecular structure 0 was changed. However, the addition of flame-retardants to flame retardant rejection indicates that the synergistic effect of the halogen-nitrogen-boron elements in the molecule has a significant effect on the flame retardancy. Currently, only relatively mature organic boron flame retardants are available, ie, lanthanum bromate. It is not only used as a high-efficiency flame retardant in +saturated polyester polyurethane and phenolic epoxy resin, but also burns the cotton fabric into the same fabric. In addition, the flame retardant also has a good smoke-removing effect. Better performance liquid additive flame retardant.

Some of these inorganic boride compounds have been widely recognized. 7-boron compounds have been used as flame retardants, but their use has been extremely limited. Right from the current situation, organoboron compounds are unstable in hydrolysis and the price ask. To a certain extent, it limits its use, but compared with organic phosphorus and organic phosphorus flame retardants, the former's toxicity is far less than Xiao Ding's latter, because the boron-based flame retardant has a few good smoke-suppression domestic to organic boron. There are few reports about flame retardants, and they are almost blank. In recent years, research on the flame retardance of organic boron has not been systematically conducted, and there are no systematic and fabric-based technologies that are extremely valuable for use. New type of organic boron flame retardant, pioneering a new research, field, not only has a theoretical significance, but also has the current European Yu Xiang, Chen Yu. Modern Chemical Industry, 1996, 518.

Zhang Jibang, Yuan Dexin. Flame retardant fabric finishing, Beijing Textile Industry Publishing tt, 1987.

Cai Yongyuan. Chemical New Materials, 1985, 1337.

Welcome to the publication of 2001 Silk in 1956, head of the National Textile and Industry Bureau. Held by China Textile Information Center, China Silk Association. The National Chinese Core Journals 2000 edition, National Science and Technology Department of Science and Technology Papers and Statistics Source Journal, was awarded the Zhejiang Provincial Outstanding Scientific and Technological Journal Award in 2000. It has a reform management seminar to discuss the application of variety and color standard testing and harvesting fields, etc. It has been used for more than ten years. It has a strong practicality, a large amount of information, and a high technical content. It is popular with people in the silk textile and related industries. , Big 16 format, 56 pages, published on the 20th of every month. Subscribers who need to subscribe can send funds directly from the post office or bank to the publication department. The annual fee is 96 yuan and 12 items including postage. All subscriptions to silk are for more than 3 years and are free of charge. 1 free copy of silk economic information for 165 years, welcome to get oxygen reservation address No. 741, Moganshan Road, Hangzhou, Zhejiang Contact Ma Jinghu Silk Name Press Bank ICBC Hangzhou Hushu Branch