http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-112341580-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_3d94b80a6095c224f76d91d65c63e4dd |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G2-24 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G2-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G2-22 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G2-22 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G2-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G2-24 |
| filingDate | 2020-11-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_50549d305ad82fb447b0757e84a0ed52 |
| publicationDate | 2021-02-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-112341580-A |
| titleOfInvention | A kind of preparation method of high thermal stability polyacetal composition |
| abstract | The invention discloses a preparation method of a polyacetal composition with high thermal stability. Trioxymethylene is used as a monomer, cyclic acetal is used as a comonomer, and a heteropolyacid catalyst is used to initiate a polymerization reaction. The addition of the polymerization induction system during the turbidity period can avoid the generation of hydroxyl ends due to the chain transfer reaction during the chain growth process, provide a molecular chain extension access point for the subsequent further improvement of the conversion rate, and at the same time improve the crystal quality of the polyacetal resin. particle generation. When the conversion rate of the polymerization monomer reaches a certain stage, adding the molecular chain extension system can further improve the conversion rate of the monomer, so that the conversion rate per pass can reach more than 99%. In the initial supply of raw materials, the pre-polymerization turbidity period, and the conversion rate of polymerized monomers when the conversion rate reaches a specific stage, comonomers are added respectively, so that the insertion of the copolymerized C-C bonds into the C-O main chain structure is more uniform, and the main chain is avoided. The appearance of long C-O structure can effectively improve the thermal stability of polyacetal. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-114044865-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-114044865-B |
| priorityDate | 2020-11-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 83.