LOWER CYCLIC DIMER REDUCES SCALING AND PROMOTES LONGER RUN TIMES

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LOWER CYCLIC DIMER REDUCES SCALING AND PROMOTES LONGER RUN TIMES
18 June 2002 - Solvay Advanced Polymers Llc

Solvay Advanced Polymers, L.L.C., will introduce UDEL P-3500 LCD, a low cyclic dimer polysulfone, at the International Conference on Membranes being held in Toulouse, France. In conjunction with the product introduction, the company will present a technical paper discussing research that supports the product's performance.

UDEL P-3500 LCD is designed specifically for membranes and offers a number of economic advantages for manufacturers of membranes. According to Judy Melville, Solvay Advanced Polymers’ global industry manager for membranes, this marks a significant improvement over UDEL P-3500, a material that has been used successfully in the industry for over 20 years.

“This new material is an important addition to our portfolio of sulfone polymers,” said Melville, “and is the first in a series of resins we plan to introduce over the next several years that have been developed specifically with the needs of membrane manufacturers and their end users in mind.” Membranes are semi-permeable barriers that allow certain substances such as water to pass through, while other substances like bacteria and viruses are selectively separated and not allowed to pass through. Typical applications include water purification (both potable and waste), medical filtration, and gas separation, as well as a variety of industrial filtration applications such as food and beverage processing.

The advantages of UDEL P-3500 LCD are attributed to the lower level of cyclic dimer present in the polymer. Thus, the name LCD. Cyclic dimer, normally produced during the manufacturing of polysulfone, can lead to ‘scaling’ within the vessels and pipes used in the membrane manufacturing process. This build-up can cause disruptions in operations since equipment may need to be shut down and cleaned. UDEL P-3500 LCD can improve the stability and shelf life of the dope solution used during solution processing, which may translate to greater efficiencies in the overall fabrication process.

In addition, UDEL P-3500 LCD may offer a number of technical advantages such as higher fiber strength for fewer fiber breaks and more consistent filtration, plus fewer surface defects. Both factors can help improve membrane performance and production yield.

UDEL P-3500 LCD has NSF approval for use in potable water applications and FDA approval for repeated contact with food products. This material is now available in commercial quantities and is manufactured at the company’s plant in Marietta, Ohio, which will be expanded in 2002 as previously announced.

http://www.solvayadvancedpolymers.com

About: Solvay Advanced Polymers Llc
Solvay Advanced Polymers Llc is a subsidiary of Solvay America Inc, the US holding company of Solvay SA. The company produces high-performance polymers that are used in a wide range of demanding applications in the automotive, aerospace, industrial, foodservice, medical, and electronics industries worldwide.

Solvay SA is an international pharmaceuticals and chemicals group with headquarters in Brussels, Belgium, employing about 30 000 people in 50 countries. In 2003, its consolidated sales amounted to EUR 7.6 billion, generated by activities in its three major business sectors: chemicals, plastics and pharmaceuticals. Solvay SA is listed in the Euronext 100 index of top European companies.

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