metallocene

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metallocene

(mɪˈtæləʊˌsiːn)
n
(Elements & Compounds) chem any one of a class of organometallic sandwich compounds of the general formula M(C5H5)2, where M is a metal atom. See ferrocene
[C20: from metallo- + -cene, as in ferrocene]
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References in periodicals archive ?
The article describes a revival in the use of metallocenes and expanded marketing of super-strong polyethylene plastics.
Although metallocenes were rarely used for this application in 2000, their usage has been increasing ever since at rates of over 60% per annum.
After the introduction of metallocene catalysts in the mid-1980s, it was suggested that metallocenes would revolutionize the polyolefin industry, but in reality, after almost 20 years of opportunity, only about 5% of the world's polyolefin production is made using metallocene catalysts (ref.
With enough extruders and layers, you can make a cost-effective, high-performance film with metallocenes.
39], while the bimodal samples were synthesized according to Ewen and Welbon [40] or Michiels and Munoz-Escalona [41] methods, using a mixture of either two different metallocenes or co-catalyst compounds to generate catalytic systems with two different active centers.
The discovery of new catalytic systems based on metallocenes began a new era in polyolefins technology.
SABIC Europe has announced plans to include metallocenes within its portofolio by 2009.
Using metallocenes, suppliers are working on acoustically absorbent foam materials, ultrahigh-flow homopolymers, and bimodal grades.
The breakthrough in producing low melting point polymers while exhibiting a low melt flow rate is said to be a positive step in developing new products where metallocenes bring unprecedented, attributes and product improvement, according to the company.
The purchase includes customer agreements and intellectual property for the manufacture of metallocenes and boron co-catalysts.
Ewen discovered the principles of new chemical catalysts that would become known as metallocenes at Exxon Chemical Co.
This brand-new form of the polymer was made possible by the advent of metallocenes.