| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_fab82a381f9d0ff8a604cb09e446c878 |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G2310-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G2230-00 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G18-4283 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C05G3-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/A01G9-02
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G63-06
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/A01G9-14
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G18-42
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B65D1-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08L101-16 |
| filingDate |
1993-10-13-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
1997-05-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_730fa9a3e61e4d4d64d9ee087728610f
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_8ec0d9b7f012fd7fc9e01a39116ff23a
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_bea93a5debaa15a3dd1abdbcc517f280 |
| publicationDate |
1997-05-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
EP-0593271-B1 |
| titleOfInvention |
Method for producing lactic acid based polyurethane |
| abstract |
The present invention relates to the production of lactic acid-based polyurethanes. In the first phase of the production, monomeric lactic acid is polymerized into an oligomer having a molecular weight of about 500 to 10,000. Next, the oligomer thus obtained is copolymerized with an isocyanate which reacts with the free hydroxyl and carboxyl groups of the oligomer to produce a high molecular weight polyurethane. The lactic acid used need not be absolutely pure. Various biodegradable end products can be obtained suitable for use as material for disposable packages, agricultural film or planting pots, or a coating for fertilizer granules. |
| priorityDate |
1992-10-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |