The Synthesis And Properties Of Microencapsuled Tris (β-chloroethyl) Phosphate

With the increasingly stringent fire safety standards in recent years has been the global market demand for flame retardant showing a rising trend, researchers of many countries are also continue to carry out the development and application of flame retardance. The current trend is to improve the flame retardant, in the same time, pay more attention to environmental protection and ecological security. The most widely studied and used flame retardants can be divided into two categories, inorganic and organic. However, whether organic or inorganic flame retardants, in the course of the physical and chemical properties of its own and many other issues affecting the long-term retardant effect, while also its widespread use id limited.The technology of flame retardant polymer materials is better to use more of the phosphorus-containing flame retardant and halogen-containing flame retardant with antimony compounds, but also supplemented by a number of drawbacks such as:low molecular weight to easy to migrate from the products; decomposition temperature materials is lower than the combustion temperature of materials that in the materials before combustion flame retardants have been part of the decomposition; easy to decompose under the action of oxygen failure and the light; the poor compatibility between flame-retardant materials or other additives. These deficiencies lead to be efficiency of flame retardant materials decreased. Some flame retardant material processing for any inconvenience caused to be returned to the physical and mechanical properties of flame retardant material adverse effect. To overcome these shortcomings of flame retardants, in recent years, domestic and international dedicated to the development of microencapsulated flame retardant technology, and has commercialized products.Tris(β-chloroethyl) phosphate (TCEP) is an excellent organic phosphorus flame retardant. As the elements of molecular chlorine and phosphorus and ester bonds, making it an excellent flame retardant polymer materials and plasticized agent. However, with phosphorus-containing flame retardants TCEP also common defects such as:easy to migrate from the PU, PE and other materials and reduce the flame retardant efficiency. The project is based on the trend of TCEP for microencapsulation, to change the form of TCEP, while increasing the thermal decomposition temperature of TCEP, it can be more widely used in flame area. The main work of this project is the first synthesis of a new type of environmentally friendly and efficient phosphorus flame retardant TCEP, on the synthesis conditions such as temperature, time and amount of catalyst, the line-depth systematic study, and the synthetic product by IR, NMR and thermal analysis, was characterized by synthetic product proved correct. At the same time the microcapsules of TCEP to change the form of TCEP. TCEP and microcapsules of the preparation conditions (reaction temperature, PH value, reaction time, etc.) conducted in-depth study to determine the optimal microcapsule TCEP reaction conditions. At the same time infrared spectroscopy, thermal analysis by means of microencapsuled TCEP were characterized. TCEP and encapsuled TCEP was added to unsaturated polyester resins, flame-retardant polyester resin was prepared. By examining the fire-retardant materials, mechanical properties, gel time, and thermal properties of the flame retardant unsaturated polyester resin performance.