| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_d6de34ff73e7936b7a4a0587449dc89e
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_7f9af914ed2fb00cd4f1b8b1a28964e4
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_43e3f84cf200886abae714a643e8f83f
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_8d863775220bbc954b3d652a628df41c
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_4804c1ceb4ee14718476b95257d3d577 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F226-10 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F26-10 |
| filingDate |
2005-11-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_582686c3d602dc7886d2ba032e3c8d04
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_7205858809574df1f0934b171f463c02
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_b10a190f131d546a43ff05de5037f75c
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f734143b4d4504438278085d9c14ed0b |
| publicationDate |
2006-05-11-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
WO-2006049257-A1 |
| titleOfInvention |
Vinylpyrrolidone polymer solution, process for producing the same, and method of handling vinylpyrrolidone polymer |
| abstract |
A high-concentration solution of a vinylpyrrolidone polymer having a low K value. It is usable in all applications including medical applications and applications where coloration is problematic. A monomer ingredient comprising N-vinylpyrrolidone as an essential ingredient, hydrogen peroxide, and ammonia are successively added to an aqueous solvent containing a copper catalyst and are polymerized at 55-90°C. The ammonia is used in an amount of 0.1-0.37 wt.% based on the N-vinylpyrrolidone. Thus, a solution of a vinylpyrrolidone polymer having a K value of 60 or smaller is obtained which has a concentration of the polymer of 40-60 wt.%. The solution has an N-vinylpyrrolidone content not higher than 10 ppm of the vinylpyrrolidone polymer, an alkanol concentration of 100 ppm or lower, and an ignition residue amount of 0.1 wt.% or smaller. A 50 wt.% solution of the vinylpyrrolidone polymer has a hue of 280 or less. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-2016188268-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-2011195624-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-2008255146-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-115093498-B
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-115093498-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-2011148906-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2019167668-A1 |
| priorityDate |
2004-11-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |