Storage Condition | Room Temprature |
Use | Used as epoxy resin curing agent at room temperature. Used as epoxy resin curing agent and toughening agent, and used as cable sealing material. Mainly used in glue, paint, sealing gasket, etc. |
Raw Materials | epsilon-Caprolactam epsilon-Caprolactam |
Reference Show more | 1. Li Menghua, Chang Wen, Lu Wenjie, etc. Chemical constituents of adipose grass and its protective effects on hypoxia/reoxygenation injury in rat cardiomyocytes [J]. Northwest Pharmaceutical Journal, 2020, v.35(03):23-28. 2. Yinmin, Yanqi, Zhao friendship, et al. Optimization of purification technology of Chrysin from poplar bark by orthogonal test [J]. Chinese wild plant resources, 2019, 038(003):23-26. 3. Unknown. Isolation of active fraction inhibiting 5 α-reductase from Camellia oleifera extract by polyamide chromatography [J]. Food Science, 2014, 13(v.35;No.482):34-39. |
EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
What is a polyamide? | polyamide (PA), commonly known as Nylon, is one of the most commonly used engineering plastics, it is a general term for polymers containing amide groups in the main chain repeating units of macromolecules. Nylon is the first synthetic fiber developed in the world. Nylon is the first resin developed for fiber by DuPont company in the United States. It was industrialized in 1939. In the 1945 years after the end of the European war, two of the most expensive things were the cigar and the nylon. Nylon can be drawn into silk-like fibers, widely used as a substitute for silk. Today, although other fibers in the field of clothing design have dissected the market originally dominated by nylon, the use of nylon strings, nylon as reinforcement in rubber (automobile tires) and other polymers is still of great significance. Polyamide is mainly used for synthetic fiber, its most prominent advantage is that the wear resistance is higher than all other fibers, 10 times higher than cotton wear resistance, 20 times higher than wool, the wear resistance of the blended fabric can be greatly improved by adding some polyamide fibers to the blended fabric. Because polyamide has non-toxic, light weight, excellent mechanical strength, wear resistance and good corrosion resistance, it is widely used to replace copper and other metals in machinery, chemical industry, instrumentation, automobile and other industries to manufacture bearings, gears, pump blades and other parts. |
definitions | polyamides are a general term for linear thermoplastic resins containing a plurality of repeating amide groups (-CONH-) in the main chain. Polyamides are mainly produced by polycondensation of dibasic acids with diamines or amino acids, commonly known as Nylon. It includes aliphatic polyamides, aromatic polyamides and aliphatic-aromatic polyamides. Polyamide fiber, our country is called nylon. |
features | compared with common plastics, polyamide has the advantages of wear resistance, light weight, toughness, drug resistance, heat resistance, self-lubricating, easy to form, easy to dye and non-toxic. The disadvantage is that the water absorption is strong, which directly affects the stability of the product size. as a large amount of engineering plastics, nylon is widely used in machinery, automobiles, electrical appliances, textile equipment, chemical equipment, aviation, metallurgy and other fields. It has become an indispensable structural material in various industries, and its main characteristics are as follows: 1. Excellent mechanical properties. Nylon has high mechanical strength and good toughness. 2. Good self-wetting and friction resistance. Nylon has a good self-wetting, friction coefficient is small, thus, as the transmission components of its long service life. 3. Excellent heat resistance. Such as high crystalline nylon Nylon 46 heat distortion temperature is very high, can be used at 150 deg C for a long period of time. After glass fiber reinforced PA66, the heat distortion temperature is above 250 ℃. 4. Excellent electrical insulation properties. Nylon volume resistance is very high, high breakdown voltage, is an excellent electrical, electrical insulation materials. 5. Excellent weatherability. 6. Water absorption. Nylon water absorption, saturated water can reach more than 3%. To a certain extent, it affects the dimensional stability of the parts. |
raw material for production | the raw material for production of polyamide is mainly refined from petroleum products. Due to the different monomers, the production method is divided into three categories: a single system of lactam or amino acid, in a certain catalyst and a certain temperature conditions, after hydrolysis, ring opening, addition, polycondensation of a series of reactions, such as nylon 6; By the synthesis of two kinds of monomer dibasic acid and diamine, often using polycondensation, decompression in addition to water, such as nylon 66; By aromatic diamine, the aromatic diformyl chloride is obtained by solution polymerization at low temperature, for example, poly (m-phenylene isophthalamide). The polyamide has good fluidity due to its low melt viscosity. Mainly used in injection and extrusion molding. Sintering and casting can also be used as needed. |
origin of development | polyamide plastics are developed on the basis of polyphthalamine fibers, it is the first thermoplastic to be able to withstand the load, and it is also the largest, most varieties and most widely used variety of the five general engineering plastics. PA is a kind of general engineering plastics with a long history and a wide range of uses. In 2000, the world Engineering Plastics Market was allocated to PA 35%, PC 32%, POM 11%, PBT 10%, PPO 3%, PET 2%, UHMWPE 2%, high performance engineering plastics (PPS, LCP, PEEK, PEI, PESU, PVDF, other fluorine-containing plastics, etc.) 2%. Due to the rapid growth of PC market demand, its market share has exceeded PA. |
Application | used as curing agent and toughening agent for epoxy resin, and used as cable sealing material mainly used in adhesives, coatings, sealing gasket and so on used as epoxy resin room temperature curing agent. Used as curing agent and toughening agent of epoxy resin, and used as cable sealing material. Mainly used for glue, paint, sealing gasket, etc. Biochemical Study |