| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_bb4ee28d43b5e8d4a3c5141fa9bcfeb0 |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10T428-2982 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F114-26 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F14-26
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F14-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08J3-12
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F114-26
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F2-40
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F2-38
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F2-30
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F2-22
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F2-00 |
| filingDate |
1980-05-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_bce60789e68e50a135a7a9ee5488531d
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_12ae5df208f4dd5a9feee4a4b46595d9 |
| publicationDate |
1982-01-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
JP-S57135-A |
| titleOfInvention |
Production of polytetrafluoroethylene fine powder |
| abstract |
PURPOSE:To produce the titled powder having excellent stretchability and mechanical properties, by polymerizing tetrafluoroethylene in an aq. medium under specified conditions. CONSTITUTION:Tetrafluoroethylene is introduced into an aq. medium contg. a water-soluble polymn. initiator and a nontelogenic surfactant in a sufficient amount to stabilize colloidal polytetrafluoroethylene particles. The polymn. reaction is initiated at 55-120 deg.C. When 10-85wt% conversion of tetrafluoroethylene to polymer is achieved, 0.7-20ppm of a short-stop selected from an arom. hydroxy compd. an arom amine compd. and a quinone compd. is added to the aq. medium, said short-stop having a solubility of 2.5X10<-6>mol/l in water at 25 deg.C and having no re-initiating ability after chain transfer or addition to free radicals in the polymn. system. Total polymn. time is prolonged 13% or more as compared to the case where said short-stop is not added, and the polymn. is completed to obtain the titled powder which has an average particle size of 0.1-0.5mum and in which core part constituting 50wt% of whole particles has a specific gravity of 2.210 and the specific gravity of final produced particle is smaller than that of core part. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-WO2020158940-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-5617243-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2020158940-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-4686861-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2009069320-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2020017472-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6747108-B1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-S5351745-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2022168877-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2020067182-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2018131573-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-0002935-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-S5845359-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-WO2009069320-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-3919527-A4
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2013157647-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2015060364-A1 |
| priorityDate |
1980-05-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |