http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-1679325-B1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_43000a5cfa837b51a2a690856b95ada2 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G8-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G8-22 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G8-08 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G8-22 |
| filingDate | 2004-10-06^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2010-06-16^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d20827ef500030f3413bc50027ed9232 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_63a53ecedcf4bb5c81f7567094cba157 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_488de6c02c75173ad4ffefc42e6241de |
| publicationDate | 2010-06-16^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | EP-1679325-B1 |
| titleOfInvention | Process for producing resorcinol-formalin resin |
| abstract | A process for producing a resorcinol-formalin resin, characterized by adding resorcinol, an inorganic salt, and an organic solvent having a solubility parameter of 7.0 to 12.5 to a water solvent, stirring the mixture to give a two-phase system containing no solid matter remaining undissolved, adding an acid catalyst, dropping formalin into the reaction system to cause a liquid-liquid heterogeneous reaction to proceed, removing the aqueous layer, adding an organic solvent and water to the reaction-product layer, the amount of the water being a half the amount of the organic solvent, stirring the resultant mixture, allowing it to stand, and then removing the aqueous layer to obtain the target resorcinol-formalin resin. This resin contains no salts, gives an aqueous solution having moderate flowability, and is reduced in the content of resorcinol monomer and the content of five-nucleus and larger resorcinol oligomers. In the process, the whole procedure including the one-stage reaction and liquid-liquid distribution is conducted in the same reactor. |
| priorityDate | 2003-10-07^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
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