| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_79751aeaa9923745648e5ae7d9c35782 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G73-1085
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G73-16
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G59-4276
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G59-4238 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G73-16
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D405-14
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G59-42
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G59-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G73-10 |
| filingDate |
1979-07-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
1981-08-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_bb8ea4f5271176b1634041c9711126e4
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_58d68c6e823fdef0bd549199820ae706
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_ee7991c05425dca5168f248195ef1e78 |
| publicationDate |
1981-08-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-4286097-A |
| titleOfInvention |
Carboxylic acid dianhydrides based on trimellitic anhydride |
| abstract |
Novel carboxylic acid dianhydrides are obtained by esterifying or trans-esterifying hydantoindiols, or diesters thereof, of the formula <IMAGE> in which m and n are each a number from 1 to 4 and R1 and R2 are each an alkyl having 1 to 5 C atoms, or R1 and R2 together are the pentamethylene radical, R3 is a hydrogen atom or methyl and R4 is a hydrogen atom, acetyl or propionyl, with trimellitic anhydride. The novel dianhydrides are valuable curing agents for epoxide resins and are suitable for the preparation of polymers which are derived from carboxylic acid dianhydrides. |
| priorityDate |
1978-07-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |