Membrane and process for the production thereof
AssigneeGambro Dialysatoren GmbH & Co. KG
InventorsCarl-Martin Bell, Reinhold Deppisch, Hermann J. Gohl
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Abstract
Membranes composed of sulphonated polyaryl ether sulphones are disclosed in which the repetitive polymer units have the formula ##STR1## in which the aryl radicals are substituted by SO.sub.3 X where X is hydrogen or an alkali metal and the polymer includes from about 0.3 to 0.6 SO.sub.3 X radicals per unit. Processes for producing these membranes are also disclosed.
Claims45
A membrane of a sulphonated polyaryl ether sulphone polymer comprising repetitive units of the formula:
- ##STR9## wherein the aryl radicals are so substituted by SO.sub.3 X-groups wherein X denotes a hydrogen atom or an alkali metal atom, that there are on average from 0.03 to 0.6 SO.sub.3 X-radicals per unit of the above formula, said SO.sub.3 X-groups of said polymer being reacted with a polymeric amine.
The membrane of claim wherein said polymeric amine is a linear polyethylene imine with a molecular weight of from 600 to 50,000 daltons.
The membrane of claim wherein said polymeric amine is selected from the group consisting of branched polyethylene imine and a primaryaminoterminal polyethylene oxide/propylene oxide, said polymeric amine having a molecular weight of from 600 to 50,000 daltons.
A process for the production of a membrane comprising the steps of:
- sulphonating a polyphenyl sulphone in a solution which includes a solvent;
- reacting said sulphonated polyphenyl sulphone with a polymeric amine in said solution;
- and precipitating a membrane from said solution.
A process for the production of a membrane comprising the steps of:
- sulphonating a polyphenyl sulphone in a solution which includes a solvent;
- precipitating a membrane from said solution;
- and reacting said membrane with a polymeric amine.
A process for the production of a membrane comprising the steps of:
- sulphonating a polyphenyl sulphone comprised of repetitive units having the following formula ##STR11## in a solution which includes a solvent, such that said resulting sulphonated polyphenyl sulphone includes 0.03 to 0.6 SO.sub.3 H-radicals per unit;
- reacting said sulphonated polyphenyl sulphone with a polymeric amine in said solution;
- and participating a membrane from said solution.
A process for the production of a membrane comprising the steps of:
- sulphonating a polyphenyl sulphone comprised of repetitive units having the following formula ##STR12## in a solution which includes a solvent such that said resulting sulphonated polyphenyl sulphone includes 0.03 to 0.6 SO.sub.3 H-radicals per unit;
- participating a membrane from said solution;
- and reacting said membrane with a polymeric amine.
Dependencies are inferred from the claim text.