The article describes a revival in the use of metallocenes
and expanded marketing of super-strong polyethylene plastics.
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
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  or Michiels and Munoz-Escalona  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.
, 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