http://rdf.ncbi.nlm.nih.gov/pubchem/patent/TW-I239965-B
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_e363f2a3ef55146fe7824fb144d95c47 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F218-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F210-02 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F218-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F2-01 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F4-40 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F218-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F210-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F2-30 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F2-22 |
| filingDate | 2002-12-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2005-09-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_1f8d1097d3465132f5544934545f9626 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_50b2e812297d0c7fe00d6b13e04f86bb |
| publicationDate | 2005-09-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | TW-I239965-B |
| titleOfInvention | Process for preparing protective-colloid-stabilized polymers by continuous emulsion polymerization |
| abstract | Process for preparing polyvinyl-alcohol-stabilized polymers based on vinyl ester and ethylene and, where appropriate, on other comonomers, in the form of their aqueous polymer dispersions or water-redispersible polymer powders, by means of free-radical-initiated continuous emulsion polymerization. Without using seed latex, and, where appropriate, drying the resultant polymer dispersion, where (a) the emulsion polymerization is carried out in at least two pressurized reactors arranged in series at a temperature of from 40 to 100 DEG C and at a pressure of from 5 to 100 bar, to a residual monomer content of less than 3% by weight, and then the polymerization is continued in at least one unpressurized reactor at a temperature of from 20 to 60 DEG C and at a pressure of < 1.0 bar, and (b) the polymerization is initiated using a redox system made from oxidizing component and reducing component, where at least part of the reducing component is introduced within the first pressurized reactor, which comprises (c) metering-in of the polyvinyl alcohol content in the first pressure reactor in such a way that its proportion is always <= 6% by weight, based on the monomers continuously introduced to the first pressure reactor, (d) not metering-in 10 to 60% by weight of the vinyl ester content until the second pressure reactor has been reached, (e) maintaining a ratio by weight of the oxidation component of the redox initiator combination to monomer of from 0.03 to 0.07 in the first reactor, and (f) not exceeding a residence time of 2.5 hours in the first pressure reactor. |
| priorityDate | 2001-12-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 100.