http://rdf.ncbi.nlm.nih.gov/pubchem/patent/DD-246306-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_a0ed73939602610d8853f9990158fc88 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F8-28 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F16-38 |
| filingDate | 1986-01-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_5042cb8848ee0fc7e80118ed514d0e1f http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_94f4d90c4a5c41e378b45639fd19fbea |
| publicationDate | 1987-06-03-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | DD-246306-A1 |
| titleOfInvention | PROCESS FOR THE PREPARATION OF POLYVINYLBUTYRAL |
| abstract | The invention relates to a process for the preparation of polyvinyl butyrals having a high degree of acetalization, which are obtained by reacting polyvinyl alcohol with butyraldehyde in the aqueous phase. The object of the invention is to produce polyvinyl butyrals having a high and uniform degree of acetalization, which are characterized by a good solubility in alkanols at room temperatures, do not form gel particles in the solution and contain no insoluble constituents as a sediment. The object is achieved in that the acetalization of the aqueous polyvinyl alcohol solution in the presence of an organic solvent mixture consisting of an alcohol and a carboxylic acid ester in the ratio of alkanol to carboxylic acid ester of 1: 2 to 1:10 with a total content of 0.1 to 8, 0 volume percent, based on the aqueous solution, takes place, wherein the boiling point of the solvent mixture is below the glass transition point of the polyvinyl alcohol used. |
| priorityDate | 1986-01-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 23.