http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-108285528-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_35dde1439c6876868949e42cc7424208 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G63-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G63-78 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G63-87 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G63-823 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G63-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G63-87 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G63-85 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G63-78 |
| filingDate | 2018-03-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_bb99de5f938af6faac9e4dd90b535c30 |
| publicationDate | 2018-07-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-108285528-A |
| titleOfInvention | A kind of preparation method of ultrahigh molecular weight medical polylactic acid |
| abstract | The invention discloses a preparation method of ultra-high molecular weight medical polylactic acid. Step 1: Put a certain proportion of lactide monomer, catalyst and initiator into a polymerization reaction container; Step 2: Raise the temperature to make the The mixture undergoes a polymerization reaction to obtain a polymer; step 3: dissolve the obtained polymer with dichloromethane or chloroform, and add a poor solvent to precipitate a crude polylactic acid product; step 4: vacuum-dry the precipitated polylactic acid crude product to obtain The ultra-high molecular weight medical polylactic acid; the catalyst is at least one of stannous octoate, stannous acetate and stannous chloride; the initiator is at least one of dodecanol, 1,4-butanediol and cyclohexane A sort of. The invention does not need segmented reaction, which is beneficial to improve production efficiency and reduce production cost; high-purity lactide is used as raw material to increase the vacuum degree of the reaction system, which is beneficial to the synthesis of ultra-high molecular weight polylactic acid. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-114752048-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-113788938-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-114213638-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-109762144-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-109762144-B http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-113512180-A |
| priorityDate | 2018-03-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 48.