INSITE technology catalyst

As a result of the catalyst and process conditions used in their manufacture, the particular copolymers of current major interest are atactic, and contain typically up to about 50 mol% ( 80 wt%) styrene. These materials have been described as pseudo-random , since successive head-to-tail styrene chain insertions have been shown to be absent, even at high levels of styrene incorporation [1,2]. The term ethylene-styrene interpolymer (ESI) is used here to describe the specific ethylene-styrene copolymers produced via INSITE Technology. For convenience, all subsequent comonomer contents are expressed in weight percentages, unless otherwise stated. For example, the code ES70 refers to an interpolymer having 70 wt.% comonomer styrene incorporation. 

In the USA Exxon Chemical and Dow Plastics were the leaders in the metallocene technology. While Exxon explored both mono- and bis-cyclopentadienyl metallocenes, Dow focused on constrained geometry catalysts based on Ti-monocyclopentadienyl metallocenes. Exxon first produced metallocene-based polymers with its Exxpol catalysts in 1991. Dow uses its INSITE technology to make ethylene-octene copolymers, introduced in 1993. Copolymers with up to 20 wt% octene are sold as AFFINITY plastomers, competing with specialty polymers in packaging, medical devices, and other applications. Dow, producing its own catalyst, considers that it leads to the uniform introduction of comonomers and long-chain branches that improve processability of otherwise linear polymers. 

Insite technology is used for homogeneous single-site catalysts which produce virtually identical molecular structure such as branching, comonomer distribution, and narrow molecular weight distribution (MWD). Solution polymerization yields Affinity polymers with uniform, consistent structures, resulting in controllable, predictable performance properties. ... 

EPM [poly(ethylene-co-propylene)] and EPDM [poly(ethylene-co-propylene-co-5-ethylidene-2-norbomene)P can be metallocene catalyst polymerized. Metallocene catalyst technologies include (1) Insite, a constrained geometry group of catalysts used to produce AfiGnity polyolefin plastomers (POP), Elite PE, Nordel EPDM, and Engage polyolefin elastomers (POP) and (2) Exxpol ionic metallocene catalyst compositions used to produce Exact plastomer octene copolymers.2 Insite technology produces EPDM-based Nordel IP with property consistency and predictability (see Sec. 3.2.2). 

Ethylene/styrene copolymers are presently available commercially from Dow Chemical Company using Dow s constrained geometry catalyst (INSITE) technology. These novel, random, semicrystalline copolymers contain 20-80 wt% styrene. The copolymer melting points decreased from about 90°C to 45°C with increasing styrene content from 20 to 45 wt%, respectively [56,57]. 

A HDPE resin in the 0.9555 density and fractional melt flow range with bimodal MWD was prepared with a 50/50 blend of high and low molecular weight resins from the slurry process using the INSITE technology. When compared with a bimodal blend of the same density and melt flow rate made with a conventional ZN catalyst, ESCR of the new resin was found to be several times higher and Charpy impact strength at —20°C improved by 60%. 

ELITE resins are produced via INSITE Technology, a constrained geometry catalyst and process technology developed by The Dow Chemical Company that provides extraordinary control over polymer arehiteeture. 

A. Single Reactor Gas Phase Innovene Process BP (BP Chemicals) with INSITE (Dow Catalysts) Technology... 

Innovene A proprietary process for polymerizing lower olefins in the gas-phase, incorporating condensed phase technology. Various types of catalysts may be used, but the Insite family of catalysts is now preferred. Developed by BP in the 1990s and first used commercially in 1998. 

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. 

Insite Dow Chemical s trade name for its ethylene family of plastics, which are produced using their metallocene catalyst polymerization technology. in situ In the natural or original position. 

Asahi Chemieal Industry Co., Ltd. and the Dow Chemieal Company have sueeeeded in producing commercial HOPE resin products never before realized with conventional catalyst technology. The combination of Dow s INSITE constrained geometry catalyst with Asahi s slurry process has made possible the production of HOPE resins with significantly improved mechanical strength and enviromnental stress crack resistance (ESCR), compared with HOPE produced from Ziegler Natta (ZN) catalysts and conventional metallocene catalysts. 

Metallocene catalysts now form the basis of polymerization technologies used by many companies to make polyolefins, including SPHERIPOL (PP, BaseU), BORSTAR (PE and PP, Borealis), INNOVENE (PE, BP), MPACT (PE, ChevronPhilhps), INSITE (PE, Dow), and EXXPOL (PE, PP, ExxonMobil). 

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