초록 ▼

Microporous membranes can be prepared which comprise a polymer which is a hydrophobic polymer in bulk form and which has an equilibrium water absorption from about 2% to about 4%, but is hydrophilic when precipitated as a membrane. The membranes are further characterized by high water flow rates at

Microporous membranes can be prepared which comprise a polymer which is a hydrophobic polymer in bulk form and which has an equilibrium water absorption from about 2% to about 4%, but is hydrophilic when precipitated as a membrane. The membranes are further characterized by high water flow rates at any given bubble point.

대표청구항 ▼

A process for filtering matter from a solution comprising flowing said solution through a microporous, inherently water wettable membrane comprising a polymer and a polymer additive, which polymer in bulk form is hydrophobic and has a water absorption equilibrium ranging from about 2% to about 4%, t

A process for filtering matter from a solution comprising flowing said solution through a microporous, inherently water wettable membrane comprising a polymer and a polymer additive, which polymer in bulk form is hydrophobic and has a water absorption equilibrium ranging from about 2% to about 4%, the polymer additive in the membrane being in an amount effective to make the membrane when formed and dried inherently water wettable, with a pore size range such that the membrane does not retain or reject dissolved proteins or salts from aqueous feed solutions.