http://rdf.ncbi.nlm.nih.gov/pubchem/patent/ES-275173-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_14ae73f8eb38a01ed84cbac29e17ad09 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B22C1-2233 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G8-24 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B22C1-22 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G8-24 |
| filingDate | 1962-03-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1962-05-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | ES-275173-A1 |
| titleOfInvention | PROCEDURE FOR THE MANUFACTURE OF CAST MOLDS AND CORES |
| abstract | Foundry moulds and cores are produced by intimately mixing a major proportion of granular refractory material and a minor proportion of a mixture of a condensate of an aldehyde and a dihydric phenol and formaldehyde or furfuraldehyde, charging the mixture into a heated mould or core box and allowing the binder to harden therein. The dihydric phenol may be mixed with one or more monohydric phenols. The formaldehyde may be supplied as paraformaldehyde or heramethyline tetramine. The mould or core box may be initially heated to a temperature between 140 DEG and 350 DEG C. Suitable refractory material is silica sand, zircon sand or quartz. The phenol aldehyde condensate is prepared with deficiency of aldehyde. Suitable dihydric phenols are resorcinol 1,3-dihydroxy-5-methyl benzene p.p1-dihydroxy diphenyl methane and p.p1-dihydroxy diphenyl propane. Suitable monohydric phenols are phenol mcresol 1,3,5-xylenol. Suitable aldehydes are formaldehyde, acetaldehyde, furfuraldehyde. In the example phenol and formalin were heated in presence of HCl. The cooled mixture was adjusted to pH 9 with caustic soda, more formalin added and the mixture again heated. Rescorinol was added and the mixture again heated. Industrial spirit was added to the cooled product, and then paraformaldehyde and Redhill T sand. Test cores were prepared by blowing the sand/resin mixture into a heated core box and leaving the resin to cure therein. |
| priorityDate | 1961-03-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 38.