| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_046e16bd6918ef3cd62184605b15a413 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G63-64
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G64-18 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08L101-16
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G63-64
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G63-85
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G64-18 |
| filingDate |
1995-10-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
1997-05-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_0acba764a2d4ca3d8dea08eeae5eb1dc
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_ebf3cf071017dbf193f592ff1655954c
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_5ef409cd5348c31eea66f48d8a18309a
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d049bf1fca4e86dc6373175ab1e00484
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d0b5db3fe92b4ef6a33ae6bc40774aca |
| publicationDate |
1997-05-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-5631344-A |
| titleOfInvention |
Block copolymer of polyesters and polycarbonates and process for preparation thereof |
| abstract |
The block copolymer of polyesters and polycarbonates comprises at least one of each of the constituting units of (I) and (II) having the general formulae: ##STR1## where the sign * indicates an asymmetric carbon atom; R 1 , R 2 , R 3 and R 4 are either a hydrogen atom or a methyl group; m and n are respective a natural numbers ranging from 300 to 5000: The block copolymer is obtained by successive ring-opening and copolymerization of optically active β-butyrolactones and cyclic carbonates in the presence of a catalyst. n The block polymer obtained has high molecular weight and high melting temperature, and can thus be used as a high strength material for practical use and which has bio-degradable and hydrolyzable nature. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6545112-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-108503803-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6121343-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/RU-2527471-C1 |
| priorityDate |
1994-10-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |