Patent ID: 11878275
Assignee: FRESENIUS MEDICAL CARE DEUTSCHLAND GMBH
Field: Chemical engineering (Chemistry)
Classification: CPC B  C | IPC B  C

Claim 0:
1. A method for potting hollow fiber membranes comprising the steps:
(i) providing a plurality of hollow fiber membranes,
(ii) reacting an isocyanate component containing at least one diisocyanate compound with inorganic particles containing hydroxy groups to form a compound comprising an isocyanate group-containing adduct,
wherein
the isocyanate groups of the isocyanate component are present in stoichiometric excess relative to the hydroxy groups of the hydroxy group-containing inorganic particles, and
wherein
at least a portion of the hydroxy groups of the hydroxy group-containing inorganic particles reacts with at least a portion of the isocyanate groups of the isocyanate component into urethane bonds,
(iii) mixing the obtained compound containing the isocyanate group-containing adduct with a polyol component containing at least one diol compound into a potting compound,
(iv) potting the hollow fiber membranes with the potting compound in at least one potting zone, and
(v) hardening the potting compound in the potting zone into a polyurethane resin.