http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CA-1179809-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_1374dd16777534b65ad4422333245af8 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D69-125 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D71-60 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D71-60 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D71-28 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D71-52 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D71-38 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D69-12 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D71-66 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D71-48 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D71-82 |
| filingDate | 1980-12-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 1984-12-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_2205edfc410ccf7e6c3230b152bb5bb3 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_5815519a107dd498e33a7196fa7e48c9 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_373b4b8257db6b79e5fffefcfe38bca1 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_6794ee7fc661a39408d3113b97132f85 |
| publicationDate | 1984-12-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CA-1179809-A |
| titleOfInvention | Process for preparation of improved semipermeable composite membranes |
| abstract | ABSTRACT In a process for producing a semipermeable composite membrane which comprises forming on a microporous substrate a thin layer of a polymeric material comprising a polyamino polymer containing at least 1 milliequivalent, per gram of the polymer in the dry state, of active amino groups selected from primary amino groups and secondary amino groups, and thereafter interfacially cross-linking a surface portion of said thin layer with a crosslinking agent having at least two functional groups (a) capable of easily reacting with either the primary or secondary amino groups or both in said polymer; the improvement wherein (1) said polymeric material contains dispersed therein a polyfunctional compound having at least two functional groups (b) substantially incapable of reacting with the primary or secondary amino groups in said polymer at a temperature at which the interfacial crosslinking is carried out, but capable of reacting easily with either the primary or secondary amino groups or both in said polymer at a temperature at least 30°C higher than said crosslinking temperature, and (2) the interfacially crosslinked thin layer is heated to a temperature at which said polyfunctional compound reacts with the primary or secondary amino groups or both in said polymer. |
| priorityDate | 1979-12-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 114.