http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-768137-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_9c34addab240abeaaed890b79b22aafe |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08J2361-24 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08J9-28 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08J9-28 |
| filingDate | 1954-03-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_4a318f83a1ef42ff8af019cdc151b8bc |
| publicationDate | 1957-02-13-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-768137-A |
| titleOfInvention | Process for the fabrication of highly porous urea-aldehyde resin filter materials |
| abstract | A liquid urea-aldehyde condensate is treated with an aqueous solution of urea and with a curing catalyst and dried to a highly porous gas-permeable mass substantially free of residual catalyst. The product may be ground to a powder and may be used as a smoke filter. The examples use urea-formaldehyde condensate and dilute sulphuric acid as the catalyst. Gelatinization and curing preferably takes place at room temperature, the temperature then being raised if desired to dehydrate the product. In Example 2, fine soot is mixed with the original condensate with the aid of a sulphonated alcohol as wetting agent. It is stated that activated carbon, charcoal, metal powder and oxides are also suitable as fillers. In Example 3 the material is gelatinized in moulds to form porous slabs suitable as filter pads. Specifications 193,420 and 261,409, [both in Class 2 (iii)], is referred to. |
| priorityDate | 1954-03-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 20.