http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-112745407-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08J2329-14 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B32B2307-558 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B32B2307-102 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B32B27-306 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F8-28 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B32B17-1055 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08J5-18 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F16-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08J5-18 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B32B27-30 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F8-28 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C03C27-12 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B32B17-10 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08L29-14 |
| filingDate | 2020-12-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2022-11-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2022-11-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-112745407-B |
| titleOfInvention | A kind of preparation method and application of polyvinyl acetal resin |
| abstract | The invention discloses a preparation method of polyvinyl acetal resin and its application. The preparation method of polyvinyl acetal comprises the following steps: S10, dissolving polyvinyl alcohol and an acidic catalyst in pure water, and fully stirring to form a mixed solution , cooling the mixed solution to below 20°C; S20, adding polyvinyl acetal raw materials, emulsifiers and aldehydes to the cooled mixed solution, and stirring at 30-70°C for 1.5-5 hours to obtain a mixed solution A; S30, Add sodium hydroxide solution to the mixed solution A to terminate the reaction and obtain a suspension containing solids; S40, remove impurities in the suspension, then separate the suspension from solid and liquid, and wash and dry the obtained solids, namely The polyvinyl acetal resin can be obtained; wherein, the ratio of meso and racemic acetal isomers in the polyvinyl acetal raw material is 3.5-15. By adding high m/r polyvinyl acetal raw materials to the reaction at the low temperature stage, a polyvinyl acetal resin with an acetalization degree of 78% or more and an m/r of 3.5 or more is prepared. |
| 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: 140.