| abstract |
A composite reverse osmosis membrane comprising a thin membrane and a microporous supporting membrane supporting it, wherein said thin membrane mainly comprises a crosslinked polyamide comprising;n (a) an amine component containing at least one member selected from the group consisting of substantially monomeric amine compounds each having at least two primary and/or secondary amino groups, and (b) an acid halide component containing at least one member selected from the group consisting of substantially monomeric cyclic acid halide compounds each having at least two acid halide groups and comprising at least two rings. |