http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-1386492-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_c7ad58d3c0b071069a8ee0cb8c8ba2e8 |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08J2375-04 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08J9-28 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08J9-28 |
| filingDate | 1972-05-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1975-03-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-1386492-A |
| titleOfInvention | Process for the production of microporous sheeting |
| abstract | 1386492 Microporous sheets BAYER AG 24 May 1972 [25 May 1971] 24466/72 Heading B5B [Also in Division C3] Microporous sheets are produced from a solution of a polyurethane in a water-soluble polar organic solvent by passing a current of superheated steam at a temperature of 101‹ to 190‹ C. over a layer of the polyurethane solution until the amount of organic solvent contained in the layer has fallen to less than 50% by weight and layer has been converted into a solid, mechanically stable microporous sheet. The polyurethane is most preferably of the polyurethane-urea type and is dissolved in dimethylformamide or dimethylacetamide. The solution is suitably applied as a thin layer to a substrate from which the resulting microporous sheet may be stripped. It is possible to carry out the process in a continuous manner, in this case the substrate on which the polyurethane solution is applied comprising a conveyer belt which passes through a steam chamber. The residue of solvent contained in the microporous sheet may be removed by an after-treatment step, which preferably comprises passing the sheet through a drying chamber or exposing the sheet to the atmosphere. Reference has been directed by the Comptroller to Specification 1,325,026. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0052936-A1 |
| priorityDate | 1971-05-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 16.