Development status of the hottest olefin thermopla

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Development status of olefin thermoplastic elastomers

polyolefin thermoplastic elastomers are composed of rubber and polyolefins. TPO has become the main rubber and plastic material in the field of automobiles and household appliances, of which the consumption in automobiles accounts for more than 75% of the total output. With the successful development of fully dynamic vulcanization TPO (TPV) by American Advanced Elastomer Systems (AES), its performance has been greatly improved, including compression deformation resistance, heat aging resistance Lu Hao introduced that the oil resistance has been significantly improved and has become the mainstream product in the TPO market at present. At present, TPE prepared by dynamic full vulcanization technology in the form of blending in the world covers 11 kinds of rubber and 9 kinds of resin, and nearly 100 kinds of rubber and plastic elastomers are prepared. At present, the largest amount of TPO products is ethylene propylene diene monomer (EPDM)/polypropylene (PP)

China developed TPO relatively late. With the rapid development of China's automobile industry and the development trend of car plasticization and lightweight, the domestic demand for TPO has increased rapidly. Some domestic TPO special materials have begun to replace imported automobile special materials, but TPV production is less and is still in its infancy

at present, dozens of scientific research and production units in China have researched, developed and produced epdm/pp, which has been applied in Xiali, Audi, Jetta, Alto, Santana and other cars. It can be used in the production of more than 60 kinds of auto parts, mainly bumpers, instrument panels, steering wheels, interior trim parts, fan covers, wheel covers, luggage and so on. In 2003, the consumption of epdm/pp for bumpers and instrument panels alone was 17100 tons, It is estimated that the demand for epdm/pp in China's automotive industry will reach about 25000 tons in 2006. In addition, the demand for epdm/pp in wire and cable, household appliances and other fields also shows a good trend

at present, the advantages of TPV bellows as an automobile sealing strip have been recognized by people in the domestic industry. Due to its good wear resistance and low friction coefficient, high molecular weight TPV can be used as the extrusion material of the sealing strip of the automobile glass guide, and can also be used as the corner material of the automobile rubber sealing strip. The water foaming sponge TPV has been successfully developed abroad, becoming a new trend to replace the sponge rubber in the manufacture of automobile sealing strips in the future; Besides, the coloring process of TPV is simple, and it is often used as the material for the outer decorative layer of automobile sealing strip. At present, several domestic sealing strip enterprises have introduced color TPV and color rubber coextrusion coating rubber sealing strip production lines. In addition, rubber sealing strips are also used in container, construction and other fields. At present, the domestic TPV production volume is small, the variety is small, the quality is poor, and the demand mainly depends on imports. In 2003, the consumption of TPO and TPV of sealing strips was about 15000 tons. Due to the high price of TPV, Therefore, domestic use is limited to some extent, of which TPV is about 2500t. Assuming that the production of sealing strips in China reaches the same level as that of foreign applied materials, the minimum demand for TPE is about 22000 tons, of which TPV should reach 6000t

the application of TPO in automobiles involves nearly 100 kinds of parts. TPO has been basically used to replace rubber products in foreign auto parts. At present, the amount of TPE on each foreign car is about 10kg, and the proportion of high-performance TPV will increase year by year on the road of comprehensive recycling

due to the importance and good prospects of the application of TPO in automobiles, electronics and electrical engineering, TPO has become the fastest-growing type of TPE, so the development and production of new processes and new products are in the ascendant. It is worth noting that AES developed a new series of TPV B100, which is the first one that can directly connect ABS, PC, abs/pc blends, polymethylmethacrylate (PMMA) Polyethylene terephthalate (so remember to be careful when choosing PET) and other plastics although the electric heating plastic granulator has been widely promoted in the country, TPV can form a solid connection key without adhesives; Basell company uses special catalysts to prepare soft polymer "reactor TPO" in the polymerization stage (thermoplastic polyolefin is directly prepared in the reactor), which greatly reduces the product cost; Exxon Mobil developed a new reactor to produce Tpos (flexible polyolefins) combined with metallocene technology, which has the balance of hardness and impact resistance; DuPont, Dow Chemical, etc. launched new grades of EPDM, including 4820 and 4920 products with high ethylene content and high crystallinity; DuPont, Dow Chemical and other companies have cooperated to develop new technologies for TPO composites and alloys, based on metallocene polyolefin elastomers, and promote a new generation of compounding technology around the world. The thermoplastic elastomers using this technology can withstand higher temperatures, and have higher melt strength, good processability and better end product performance; Ningxia Institute of chemical design and research has successfully developed a new ternary blend TPO, which is prepared by introducing a third component with saturated structure on the basis of epdm/pp and using dynamic vulcanization reaction technology. It not only has the characteristics of the original epdm/pp, but also has good processing fluidity, UV linear resistance, etc. it is convenient for application and processing in the fields of automotive, electronic and electrical

in the future, China's key is to accelerate the industrialization of dynamic vulcanization TPO and reactor synthesis TPO, and develop a series of TPO and TPV products that replace foreign products in the automotive industry

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