http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0064073-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_33bd92c1d39266f530642843d6c54618 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08K5-14 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B22C1-224 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08K5-14 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B22C1-22 |
| filingDate | 1981-10-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_7d2a7e5c4b5b337c36b76668341d2f9f |
| publicationDate | 1982-11-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | EP-0064073-A1 |
| titleOfInvention | Process for curing foundry cores and molds |
| abstract | Process for polymerizing a mixture of sand and furan resin used in foundry practice to form cores and molds through the use of sulfur dioxide gas without the formation of sulfuric acid. Polymerization takes place when the furan resin, i.e. a resin containing a predominant amount of a furan moiety, is mixed with a smaller amount of diisopropylbenzene monohydroperoxide (DIPBMHP) or diisopropylbenzene dihydroperoxide (DIPBDHP) , or a mixture of these components. Besides the fact that they react with sulfur dioxide in the gaseous state without forming sulfuric acid, these specific alkaryl hydroperoxides, whose monohydroperoxides have at least one cycloalyl substituent, have the specific characteristic of polymerizing the resin of so that the halves of (DIPBMHP) or (DIPBDHP) are bonded together in the polymerized resin. The result is a polymerized core or mold with a novel composition and superior physical properties to prior art cores and molds made with furan resins, in which reaction with sulfur dioxide produces sulfuric acid. . The cores and molds obtained by the process exhibit performance characteristics equal to or better than those of cores and molds made with heat-polymerized phenol-formaldehyde novolac resins initiated by examineethylene tetramine, during a use under comparable die-casting conditions. |
| priorityDate | 1980-10-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 141.