The metallocene and single site catalyst (SSC) catalyst technologies have significantly improved PP product performance and further expanded the application of PP. ExxonMobil's Univation (Exxpol/Unipol) technology, Basel's Metocene and Spheripol technology, JPC/MITSUBISHI Chemical's JPC technology, Dow Chemical's Insite/Spheripol technology, Borealis's Borecene technology, Azerbaijan Tofina’s Atofina technology, Mitsui Chemical’s Mitsui Technology, and BP’s BP technology can all use metallocene/SSC catalyst technology to produce high-performance isotactic PP, impact copolymer PP, random PP, and syndiotactic PP. Elastic homopolymer PP. The development of metallocene polypropylene (mPP) has attracted much attention. The current mPP market size is approximately 200,000 tons/year, which is 20% of the mPE market size. The annual growth rate of mPP is 25%-35%. In 2006, the market was approximately 4.24 million tons per year.
Basel and Exxon Mobil Corporation will share their respective mPP patented technologies to speed up cooperative development. Basel will increase its mPP capacity from 30,000 tons/year to 300,000 to 400,000 tons/year in 2004. And use common technology to build industrial scale devices. Japan Polyplastics has developed a soft mPP that is comparable to elastomers. Since 1993, Dow has used its metallocene technology to industrially produce five new product lines. Recently developed propylene-based polymers have improved processing performance and increased rigidity compared to conventional PP.
Attofina Petrochemicals has for the first time brought metallurgical PP (sPP) into industrial production, while its competitors ExxonMobil and Basel can only produce iso-propylene PP. Compared with conventional PP or metallocene isotactic PP, the molecular structure of sPP makes it more transparent, sPP is also much softer than isotactic PP, it can be compared with high ethylene content of random PP interpolymers and other metallocene plastics. competition. In the early 1990s, Atofina produced sPP in medium-sized plants in Lapat, Texas, USA. The company has converted the Lapat 13600-18200 tons/year PP production line to sPP, which will bring its output from 2700-3600 within 5 years. Ton/year increased to 13,600 tons/year. sPP is used to make containers to control shrinkability and easy molding. It can replace PET polyester and PVC for containers that are not easy to be molded. sPP can also be used in injection and injection molding applications instead of PE.
Basel has developed a new series of Ziegler-Natta (ZN) catalysts that are expected to be commercialized in 2003. This patented succinate ZN catalyst has been validated on Basel polypropylene (PP) units in Italy and the Netherlands. This advanced fifth-generation catalyst can greatly improve the homopolymer and multiphase copolymer PP properties by improving the molecular weight distribution. This catalyst can increase the yield by 40%-50% compared to a standard 4th generation ZN catalyst (with phthalate body as internal donor). The 5th generation ZN catalyst, introduced by Basel in 1999, uses succinate as an internal donor, improving the catalyst's ability to control molecular weight distribution, isotacticity, and oligomer content.
Dow Chemical also introduced PP's new catalyst and process control software for its Unipol PP process. Advanced Ziegler-Natta catalysts are used to produce Imp-pax impact copolymerization grade PPs that meet the specific engineering requirements. After the recombination of C-Carbon and Dow Chemical, the company launched the new industrial catalyst Shac330PP for the first time, which is based on the morphological control platform adopted by Shac310 and 320PP catalysts. This new generation of catalysts improves plant operation and greatly reduces the transfer costs of Unipol PP process technology. The use of this catalyst can increase plant capacity by 15%-25% without increasing investment. In addition, an automatic process control software based on Windows NT is designed for Unipol PP process technology, which can be integrated with device automation and company information systems.
Chenille Fabric,White Chenille Fabric,Chenille Fabric Couch,Grey Chenille Fabric
Shaoxing Yiyang Textiles Co.,Ltd , https://www.yiyangfabrics.com