UDEL®, RADEL® A & RADEL® R as membrane Resin

 a) In general

• More than 20 years of successful use in the membrane industry.
• Vast accumulated research knowledge in the use of polysulfone in open and patent literature.
• Low levels of insolubles, extractables and insoluble gels.
• FDA and other agency approvals (like EC Directives, NSF 61,…).
• Research and Development team at your service to answer your needs and specific requirements.

b) Chemical Resistance

• Stable to wide pH levels (from 2 to 13) and therefore can withstand many types of membrane cleaning methods.
• Very good blood compatibility.
• Good resistance to oxidizing agents such as aqueous chlorine, and bleach.
• Fairly good chemical resistance allowing feeds containing various contaminants.
• Soluble in water-soluble industrial solvents that are suitable for membrane manufacturing.
• Good hydrolytic stability allowing long term use of the membranes.
• Good oxidative stability allowing long term use of the membranes.

c) Mechanical properties

• Fairly good compaction resistance allowing use under high pressures.

d) Thermal properties

• High enough glass transition temperature to allow use in high temperature, and use of different sterilization techniques such as steam, ethylene oxide, gamma radiation and e-beam...

e) Membrane manufacturing

• Easy membrane manufacturing.
• Allows reproducible formation of good quality membranes with sufficient flux and fiber strength.
• Forms membranes with different pore sizes, with proper choice of pore formers, viscosity and gelation conditions.
• Provides stable polysulfone solution viscosities even in the presence of air.
• Highest molecular weight grade, Polysulfone UDEL® P-3500 NT, is ideal in terms of solution viscosity and fiber strength; Formation of lower dimer solution is now possible with new UDEL® P-3500 NT LCD.