http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-113024772-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G59-063 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G59-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G59-022 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G59-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G59-02 |
| filingDate | 2019-12-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2022-12-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2022-12-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-113024772-B |
| titleOfInvention | A kind of bisphenol A novolak epoxy resin and preparation method thereof |
| abstract | The invention discloses a bisphenol A novolak epoxy resin and a preparation method thereof. The method comprises the following steps: A) under oxygen-free conditions, bisphenol A novolac resin, epichlorohydrin, a cosolvent, and a reducing agent Heating and reacting with a phase transfer catalyst to obtain an intermediate with a chlorohydrin ether structure; B) the intermediate of the chlorohydrin ether structure obtained in the above step A) reacts under the action of a basic catalyst, wherein the resin in the control product The hydrolyzed chlorine is 2000～10000ppm; C) after the reaction in step B), epichlorohydrin and cosolvent are reclaimed under reduced pressure to obtain crude bisphenol A novolak epoxy resin; D) the crude bisphenol A obtained in step C) is Phenol A novolac epoxy resin is dissolved, desalted with water, refined, and subjected to steps including neutralization, washing with water, filtering, and solvent removal to obtain bisphenol A novolac epoxy resin. The method of the invention can reduce the side reaction between bisphenol A phenolic resin and epichlorohydrin, and reduce the occurrence of emulsification during water washing and liquid separation. |
| priorityDate | 2019-12-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 63.