Chinese name: polycarbonate
Polycarbonate tube
Alias: polycarbonate 2,2-bis (4-hydroxyphenyl) propane polycarbonate [2] acid ester Polycarbonate (flame retardant) Polycarbonate (coloring)
English name: Polycarbonate
Common abbreviation: PC
Chemical name: 2, 2'-bis(4-hydroxyphenyl)propane polycarbonate
CAS No.: 25037-45-0
Composition
Polycarbonate is a strong thermoplastic resin that derives its name from its internal CO3 group. It can be synthesized from bisphenol A and carbon oxychloride (COCl2). The more commonly used method is the melt transesterification method (bisphenol A and diphenyl carbonate are synthesized by transesterification and polycondensation reactions).
Applications
The three major applications of PC engineering plastics are glass assembly industry, automotive industry and electronics, electrical industry, followed by industrial machinery parts, CD-ROMs, packaging, computers and other office equipment, medical and health care, film, leisure and protective equipment, etc. PC can be used as windows and doors, PC laminates are widely used in banks, embassies, detention centers, and public*** places, for aircraft hatch covers, lighting equipment, industrial safety stalls and bulletproof glass. PC boards can be used for various signs, such as gasoline pump dials, automobile instrument panels, cargo and open-air commercial signs, point sliding indicators, PC resin used in automobile camera systems, dashboard systems and interior decorative systems, used as headlamp covers, front and rear automobile gear boards with reinforcing ribbing, reflective mirror frames, door frames, operating rod sheathing, flow blocking boards, PC is used as a junction box, sockets, plugs and bushings, spacers, TV conversion devices, telephone line brackets under the communication cable, PC is applied as a junction box, receptacles, plugs and casing, spacers, television conversion PC is used as junction boxes, sockets, plugs and bushings, gaskets, TV converters, connectors for communication cables under telephone line brackets, electric switch boxes, telephone switchboards, switchboard components, relay housings, PC can be used as low load parts for household appliance motors, vacuum cleaners, shampooers, coffee makers, toasters, handles for power tools, various gears, worm gears, bushings, guide gauges, shelves in refrigerators, etc. PC is an ideal material for optical disc storage media. PC bottles (containers) are lightweight, good impact resistance, resistant to certain high temperatures and corrosive solution washing, as recyclable bottles (containers). pc and pc alloy can be used to make computer racks, shells and auxiliary machines, printer parts. Modified PC is resistant to high-energy radiation sterilization, boiling and baking disinfection, can be used for blood specimen collection instruments, blood oxygenator, surgical instruments, kidney dialyzer, etc. PC can be made into helmets and helmets, protective masks, sunglasses and sports eye protection. PC film is widely used in printing charts, pharmaceutical packaging, membrane commutator [5].
Polycarbonate application development is to high composite, high functionality, specialization, serialization direction, has launched a CD-ROM, automotive, office equipment, box, packaging, medicine, lighting, film and many other products of their respective special grade grades.
Building materials industry
Polycarbonate sheet with good light transmission, impact resistance, ultraviolet radiation and its products, dimensional stability and good molding and processing performance, so that it than the traditional use of inorganic glass in the construction industry has obvious technical performance advantages. China has built more than 20 polycarbonate building materials hollow plate production line, the annual need for polycarbonate about 70,000t, to reach 140,000t in 2005.
Automotive Manufacturing Industry
Polycarbonate has a good impact resistance, resistance to thermal distortion performance, and good weather resistance, high hardness, and therefore suitable for the production of cars and light trucks in a variety of parts and components of the main focus of its lighting system, The main focus is on lighting systems, instrument panels, heating panels, defrosters and bumpers made of polycarbonate alloys. According to the data of developed countries, polycarbonate in the electrical and electronic, automobile manufacturing industry in the use of 40% to 50%, China in the field of the use of the proportion of only 10% or so, electrical and electronic and automobile manufacturing industry is China's rapid development of the pillar industries, the future of these areas of polycarbonate demand will be huge. It is expected that in 2005 the total number of cars in China reached more than 300 million, the demand reached 30,000t, thus the application of polycarbonate in this field is extremely potential for expansion.
Medical equipment
Since the polycarbonate products can be subjected to steam, detergent, heating and large doses of radiation disinfection, and does not occur yellowing and physical properties of the decline, and therefore is widely used in artificial kidney hemodialysis equipment and other need for transparent, intuitive conditions and the need for repeated disinfection of medical equipment. Such as the production of high-pressure syringes, surgical masks, disposable dental appliances, blood separators and so on.
Aerospace
With the rapid development of aviation and aerospace technology, the requirements for various components in aircraft and spacecraft are constantly improving, making the application of PC in this field is also increasing. According to statistics, only a Boeing-type aircraft with polycarbonate parts up to 2,500, a single machine consumes about 2 tons of polycarbonate. And in the spacecraft is used in hundreds of different configurations and by the glass fiber reinforced polycarbonate parts and astronauts protective equipment.
Packaging field
In the packaging field of new growth is the re-sterilizable and reusable water bottle of various models. Because polycarbonate products have the advantages of light weight, impact resistance and good transparency, with hot water and corrosive solution washing treatment does not deform and remain transparent, some areas of PC bottles have completely replaced glass bottles. It is predicted that as people attach importance to the quality of drinking water continues to improve, polycarbonate in this regard, the rate of growth in the amount of growth will remain at more than 10%, is expected to reach 60,000t in 2005.
Electronic appliances
Because of the polycarbonate in the wide range of temperature and humidity has a good and constant electrical insulation, is an excellent insulating material. At the same time, its good flame-retardant and dimensional stability, so that it has formed a wide range of applications in the electrical and electronic industry. Polycarbonate resin is mainly used in the production of a variety of food processing machinery, power tool shells, bodies, brackets, refrigerator freezer drawers and vacuum cleaner parts. And for the parts of the higher precision requirements of computers, video recorders and color television sets in the important parts, polycarbonate materials have also shown a high value of use.
Optical lens
Polycarbonate with its unique high transmittance, high refractive index, high impact resistance, dimensional stability and easy to process molding and other characteristics, in the field occupies an extremely important position. Optical grade polycarbonate with the production of optical lenses can not only be used for cameras, microscopes, telescopes and optical test instruments, etc., but also can be used for film projector lens, copier lens, infrared autofocus projector lens, laser beam printer lens, as well as a variety of prisms, multi-faceted mirrors, and other office equipment and home appliances, its application market is extremely broad. Polycarbonate in the optical lens is another important application area is as children's glasses, sunglasses and safety glasses and adult glasses lens material. The average annual growth rate of polycarbonate consumption in the world eyeglass industry has been maintained at more than 20%, showing great market vitality.
CD-ROM
With the rise of the information industry, optical grade polycarbonate CD-ROM as a new generation of audio-visual information storage media, is a very fast and rapid development. Polycarbonate with its excellent performance characteristics and thus become the world's optical disk manufacturing industry's main raw materials. The amount of polycarbonate consumed by the world optical disk manufacturing industry has exceeded 20% of the overall consumption of polycarbonate, and its average annual growth rate of more than 10%. China's optical disc production is growing rapidly, according to the State Administration of Press and Publication figures released in 2002, the country **** 748 optical disc production lines, the annual consumption of optical-grade polycarbonate about 80,000 tons, and all imports. Thus, the application of polycarbonate in the field of optical disk manufacturing prospects are extremely broad.