Solvay’s sulfone polymers have been used to make membranes for over 25 years. They are soluble in conventional processing solvents and used to make hollow fiber, flat sheet and tubular membranes. Low cyclic dimer grades improve the stability of dope solutions, reduce filter clogging, and minimize manufacturing defects.
These high-temperature thermoplastics impart high fiber strength, toughness, rigidity and hydrolytic stability. This, combined with their excellent chemical resistance, enables membranes to tolerate a variety of feed streams and cleaning methods.
Excellent chemical resistance combined with hydrolytic stability, high strength and the ability to operate over a broad pH range makes these polymers the right choice for membranes used in demanding end-use environments.
Key Features
- Excellent mechanical properties
- Outstanding hydrolytic stability
- Stable at pH levels from 2 to 13
- Excellent biocompatibility
- Easy to form MF and UF membranes
- Low level of insolubles and extractibles
- Sterilizable by steam, ethylene oxide and gamma radiation
- Global agency approvals
Membrane Grades |
| Pellets | Powders | Typical Mol. Wt. [Mw (x103)] |
Udel® PSU
polysulfone | P-1700 LCD | | 67–72 |
P-3500 LCD | | 75–81 |
Veradel® PESU
polyether-sulfone | | 3000MP | 64–68 |
| 3000P | 62–64 |
| 3100P | 52–55 |
| 3200P | 45–47 |
Radel® PPSU
polyphenylsulfone | R-5000 | | 52–55 |
R-5500 | | 55–59 |