INDEX technological catalysts

Dow Chemical has launched a range of foams which are said to exceed industry standards for softness and toughness. This article supplies brief details of the foams which are based on Dow s Insite catalyst technology. Synergy Soft Touch Foams are produced using Dow s Index Interpolymers, a new thermoplastic polymer family based on the copolymerisation of ethylene and styrene. The foams are offered in three grades of softness, and other properties include shock absorption, vibration damping and insulation. 

With new catalysts based on di-ether technology (5th generation catalyst, RK-Catalystand RH-Catalyst), wider melt-index ranged polymers can be produced (compare with those produced with 4th generation catalyst) due to the high hydrogen response of RK/RH-Catalyst. 

The authors of individual chapters are top specialists in their areas. They comprise an international group of scientists and practitioners (Great Britain, Italy, The Netherlands, Poland, Russia, Sweden, Switzerland, and the U S.A.) from universities and companies that are advanced in the technology of structured catalysts. The editors express their gratitude to all of the contributors for sharing their experience. The editors also appreciate the administrative assistance of Mrs. Qwen Klis and the help of Ms. Annelics van Diepen in the preparation of the subject index. 

One other experimental observation demonstrates the difference between old and new technologies. When a composition such as treated fumed silica In polymer B Is heated, haze develops. This haze Is due to the fact that the refractive Index of the polymer changes with temperature quite drastically while that for the solid filler does not. To demonstrate the change In refractive Index with temperature, the refractive Index, of j catalyst free devolatilized polymer A sample gave the following data ... 

Metallocene LLDPEs are relatively difficult to process because of narrow molecular weight distribution (MWD) when compared to conventional Ziegler LLDPEs. Metallocene catalyst based octene-1 LLDPE copolymers made by the Dow Chemical Company are known to process better as a result of their long-chain branched (LCB) structure, referred to as Dow Rheology Index (DRI) numbers.The LCB is also responsible for improved melt strength in mLLDPEs.Exxon has also addressed the processibility issue with advanced performance terpolymers.LCB bimodal mLLDPE resins are commercially available from BP Chemicals.Such mLLDPEs are produced by BP s proprietary gas phase fluid bed technology called Innovene technology. 

LyondellBasell (2009) New single-site catalyst boosts process performance of LyondellBasell s Metocene PP technology. http //lyondellbasell.mediaroom.com/index.php s=43 item=678. Accessed 27 March 2013... 

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