http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CA-1046698-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_19563fe2f95886f37991424a6bef6761 |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08J2327-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y02P20-582 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y02W30-62 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08J11-08 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B29B17-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B29B17-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B09B3-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F6-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F6-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08J11-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B29B11-00 |
| filingDate | 1975-07-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 1979-01-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_6b385ae500c6125efaa8a746dbd23362 |
| publicationDate | 1979-01-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CA-1046698-A |
| titleOfInvention | Recovery of flexible and rigid materials from scrap polyvinylchloride, its copolymers and congeners |
| abstract | ABSTRACT A process for the recovery of a reuseable polyvinyl-chloride base composition from scrap material consisting of the constituents to be reused and contaminants associated therewith. The process comprises comminuting the scrap material into small pieces; digesting the small pieces of scrap in a polar aprotic solvent for any polyvinylchloride polymer and copolymer in said scrap, for a time sufficient to effect complete dissolution of the polyvinylchloride polymer and copolymer content of said scrap; filtering the resulting mixture and separately recovering a liquid filtrate containing the polymer content, in solution, and a solid residue containing constituents of said scrap material which did not dissolve in said polar aprotic solvent. The polymer is then precipitated from solution in said filtrate by flushing said poly-mer from said solution in said filtrate by addition of a flushing liquid selected from the group consisting of water, saturated hydrocarbons having boiling points at least 50°C less than the boiling point of said polar aprotic solvent and which does not form an azeotrope with said polar aprotic solvent and mixtures consisting of said saturated hydrocarbons and lower aliphatic (Cl - C4) alcohols. The precipitated solid polymer containing material is then recovered separately from the liquid in which it was precipitated. By the foregoing process, a flexible semi-rigid or rigid variation of the orginal composition may be obtained, practically irrespective of the degree of physical contamination of the original plastic composition. |
| priorityDate | 1974-08-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 70.