| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_c1755eede76ea7e719a3e0d2843cd793 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C03C27-12
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F16-34
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F8-28 |
| filingDate |
1991-06-26^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f370710195df8cbddc66161112a9427b
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_b94bd2157e805e9ba47dcde45f3bb171 |
| publicationDate |
1993-01-08^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
JP-H051108-A |
| titleOfInvention |
Method for producing polyvinyl acetal resin |
| abstract |
(57) [Summary] [Purpose] To obtain a polyvinyl acetal resin which prevents aggregation of resin particles and adhesion of scale to the inner wall of the apparatus and has a reduced dissolution viscosity. [Constitution] Loop reactor consisting of glass lining tube A polyvinyl alcohol aqueous solution having an average degree of polymerization of 1700 and a degree of saponification of 99.0 mol%, a mixed solution of acetaldehyde and butyraldehyde are circulated in 10 and partially reacted at 60 ° C. in the presence of a hydrochloric acid catalyst. The Reynolds number of the mixed solution circulating in the reactor 10 is 7236. The degree of acetoacetalization of the reaction product is 12.9. Mol%, butyralization degree is 29.6 mol%. The reaction product is successively placed in a conventional kettle-shaped reactor 2 and reacted at 65 ° C. for 4 hours with stirring and aged to obtain a granular polyvinyl butyral resin having a particle size of 5 to 10 μm. The acetoacetalization degree of the resin is 39.5 mol%, butyralization degree is 31.0 mol%, and 5% solvent (equivalent mixed solvent of ethanol and toluene) The solution has a viscosity of 60 centipoise and a low viscosity. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7385005-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2008050517-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2018181389-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-2016069440-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-1795343-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-9081313-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-11504951-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-2006160562-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-WO2008050517-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-6487131-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-5940301-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-03066690-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/KR-20130124319-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2012043455-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-2019094257-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-2008285513-A |
| priorityDate |
1991-06-26^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |