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HC coating Network News: Abstract: Reactive halogen-free phosphorus-containing flame retardant epoxy resin for consistent, low toxicity, low smoke, environmental trends, and flame retardants in the field become the mainstream of development. Add a flame retardant epoxy resin compared to the reaction flame retardant epoxy resin flame retardant effect is more durable, more efficient flame. This article focuses on their synthesis, application and development prospects are reviewed. Keywords: flame retardant, phosphorus-containing epoxy resin, limiting oxygen index, and environmental protection Epoxy resin (EP) are a class of widely used with good overall performance of the thermosetting polymer resin, but poor flame retardant properties, limiting oxygen index (LOI) is only 19.8, and its flammability and fire away continuous spontaneous combustion of a number of areas have been unable to meet the increasingly stringent safety and environmental requirements. At present, flame retardant epoxy resin to improve the most common method is to introduce to the halogen flame retardant epoxy resin, the method is simple and obvious effect; but in the process of combustion and high temperatures will produce a lot of smoke and have corrosive hydrogen halides, pollute the environment, affect human health. United States, Britain, Norway, Australia and other countries have enacted or enact laws and regulations mandatory for certain products, combustion toxicity testing, or use the process of release of acid gases concentration mandatory. Therefore, halogen-free, low toxicity, low smoke, environmental protection has become the world development trend of flame retardant products. Phosphorus type flame retardant resin heat or combustion generally produces phosphoric acid, phosphoric acid and water vapor, its toxicity and corrosive fumes were lower than the halogen containing resin, combined with the structure of POC special key or PC key and stability of phosphorus-containing flame retardant plasticizer effect of both good. While organic phosphorus-containing epoxy resin as a new type of flame retardant, resistant to dissolution, difficult to move, easy to spread and excellent melt flow rate, a higher flame retardant efficiency, excellent thermal stability, it can be flame-retardant materials, good mechanical properties, can not afford to frost, transparency is good. Amount of less reactive flame retardant containing phosphorus, flame retardant properties can, to further improve flame-retardant durability, while the thermal properties of materials and their mechanical properties have little effect. To meet increasingly stringent environmental and industry needs. Reactive phosphorus flame retardant epoxy resin modified epoxy resin prepared from the prepolymers and Curing agent Two directions to achieve. This paper described two aspects from the research status and progress and the prospect of their research. 1 Organic phosphorus modified epoxy prepolymer Organic phosphorus modified epoxy prepolymer preparation, mainly through the phosphate groups and the epoxy-based ring opening reaction occurs, the introduction of the reactive phosphorus-containing groups with amines to complete the formation of phosphorus amide crosslinking process; or to introduce the reactive phosphorus has been active groups of resin prepolymer, and Epichlorohydrin Or glycidol reaction, the introduction of the new structure of the epoxy phosphate active groups. The e-commerce company in China offers quality products such as steel slitter machine Manufacturer , steel bar cutting machine, and more. For more , please visit slitting and rewinding machine today!
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