Celanese to Announce Next Generation GUR® UHMW-PE with Breakthrough Technology at K 2013

Sulzbach, Germany, Florence, Ky., Shanghai, PR China – Celanese Corporation (NYSE: CE), a global technology and specialty materials company, today announced it will introduce a next generation GUR® ultra high molecular weight polyethylene (UHMW-PE) with breakthrough technology at K 2013 — nearly 60 years since the engineered material was first introduced at K 1955.

The announcement of the breakthrough technology, capable of delivering a step change in both material performance and processing efficiencies, is one of several Celanese is scheduled to make at booths A07 and B07 during K 2013 in Düsseldorf, Germany.

“We believe this new Celanese technology can deliver tremendous value to our customers across a broad range of applications,” said Christopher Davie, Celanese strategy and marketing director - GUR, Industrial, Medical and Composites. “For example, this breakthrough technology can help manufacturers of membranes and separators achieve superior material performance and processing advantages.”

Based on in-house testing vs. grades in the existing product line, the next generation of GUR UHMW-PE:

• Enhances performance for the separators used in lithium-ion batteries, which improves membrane puncture strength and provides greater design freedom

• Demonstrates better gelation that is expected to provide fiber and membrane manufacturers clear processing advantages, such as increased throughput

• Exhibits significantly higher abrasion resistance to extend life of machined parts while maintaining impact strength performance

• Improves fiber strength and tensile properties for critical applications, such as life protection equipment or high-strength ropes

“Trial samples will be available during the second half of 2014,” Davie said. “Customers interested in working with us and acquiring trial samples should stop by the Celanese booth during K 2013.”

Celanese will select strategic development customers to receive samples of the next generation GUR UHMW-PE when they become available.

“Consistent with our vision of being the first-choice chemistry solution source for our customers, Celanese is proud to introduce this exciting new technology that we believe will redefine how people think about UHMW-PE while delivering real value to our customers,” said Phil McDivitt, vice president and general manager of the engineered materials business. “We look forward to working closely with our development customers in realizing the full potential of this exciting technology.”

About Celanese

Celanese Corporation is a global technology leader in the production of differentiated chemistry solutions and specialty materials used in most major industries and consumer applications. With sales almost equally divided between North America, Europe and Asia, the company uses the full breadth of its global chemistry, technology and business expertise to create value for customers and the corporation. Celanese partners with customers to solve their most critical needs while making a positive impact on its communities and the world. Based in Dallas, Texas, Celanese employs approximately 7,600 employees worldwide and had 2012 net sales of $6.4 billion. For more information about Celanese Corporation and its product offerings, visit www.celanese.com or our blog at www.celaneseblog.com.

All registered trademarks are owned by Celanese or its affiliates.

Forward-Looking Statements
This release may contain “forward-looking statements,” which include information concerning the company’s plans, objectives, goals, strategies, future revenues or performance, capital expenditures, financing needs and other information that is not historical information. When used in this release, the words “outlook,” “forecast,” “estimates,” “expects,” “anticipates,” “projects,” “plans,” “intends,” “believes,” and variations of such words or similar expressions are intended to identify forward-looking statements. All forward-looking statements are based upon current expectations and beliefs and various assumptions. There can be no assurance that the company will realize these expectations or that these beliefs will prove correct. There are a number of risks and uncertainties that could cause actual results to differ materially from the forward-looking statements contained in this release. Numerous factors, many of which are beyond the company’s control, could cause actual results to differ materially from those expressed as forward-looking statements. These factors include the inability to obtain regulatory approvals of the transaction and satisfy conditions on the proposed terms and schedule and the possibility that the transaction does not close. Other risk factors include those that are discussed in the company’s filings with the Securities and Exchange Commission. Any forward-looking statement speaks only as of the date on which it is made, and the company undertakes no obligation to update any forward-looking statements to reflect events or circumstances after the date on which it is made or to reflect the occurrence of anticipated or unanticipated events or circumstances.