http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-S6245637-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_732d819fbafc92a2a3708cb4312ea3a6 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08J9-28 |
| filingDate | 1985-08-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_fa6d1313fb2846464cc92bb1e7e2d18b http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_10b9f8d011461a2ea710560444c9201b |
| publicationDate | 1987-02-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | JP-S6245637-A |
| titleOfInvention | Porous polyvinyl alcohol hydrogel microsphere |
| abstract | PURPOSE: The titled microspheres of a high strength, a high modulus and a high water content, obtained by freezing an aqueous PVA solution in the form of water drops dispersed in a specified dispersing medium and crystallizing the polymer at a low temperature. n CONSTITUTION: An aqueous PVA solution kept in the form of water drops is obtained by pouring an aqueous solution containing 5W40wt% PVA of a degree of saponification ≥95mol% and an average degree of polymerization ≥1,000 into a dispersing medium such as a water-immiscible organic solvent (e.g., benzene) or an oil (e.g., silicone oil) with agitation at a speed of 200rpm. This aqueous PVA solution is frozen by cooling to -5°C or below for at least 5hr, and the polymer phase of PVA is isolated to obtain a frozen-phase molecular structure. This structure is left standing at 0W10°C for at least 10hr to crystallize the polymer phase. In this way, high-strength, high-water content, porous PVA gel microspheres of a diameter of 0.1μmW1mm, a pore diameter of 0.01W50μm, a water content of 40W95wt% and a compressive strength ≥10kg/cm 2 are obtained. n COPYRIGHT: (C)1987,JPO&Japio |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5336551-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-H0589409-U http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-2019116565-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5422050-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0256139-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-10398724-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-H02208332-A |
| priorityDate | 1985-08-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 22.