http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-112679415-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y02P20-584 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D211-44 |
| filingDate | 2020-12-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2022-10-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2022-10-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-112679415-B |
| titleOfInvention | A kind of liquid ultraviolet absorber containing hindered amine and preparation method thereof |
| abstract | The invention provides a liquid ultraviolet absorber containing hindered amine and a preparation method; the steps of the invention include: step 1, adding UV-3, tetramethylpiperidinol alkylate and solvent into the reactor; step 2, The temperature was raised to 120°C, a catalyst was added, the reaction was maintained, and the ethanol produced by the reaction was separated, and the reaction time was 10h; in step 3, the temperature was lowered to 80°C, a solvent and water were added to the reactor, stirred for 1 hour, and the liquid separation was carried out. Concentrate under negative pressure until no outflow occurs, and discharge the material to obtain a colorless transparent liquid. The invention overcomes the disadvantage that the solid ultraviolet absorber and the light stabilizer in the prior art can only be added to the polymer by dissolving the cosolvent at high temperature and stirring evenly; the product prepared by the invention has good light stability, thermal stability and high efficiency The high light absorption reduces the amount of addition and greatly reduces the production cost. The method of the invention is simple, high in repetition rate and safe. |
| priorityDate | 2020-12-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 37.