| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_17e6c778a71c468773a533a0b4dcd1e8 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F8-14 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F2-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F16-12
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F216-14
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F4-28
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F20-02
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F8-14
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F4-32
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F222-06 |
| filingDate |
1993-02-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a01258b7e59a3c3b0ed2b0cd47c54518
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_7be9caafbe873f265584563d2d5e4d1c
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_5f5b9f0fa71bf88b62582463de2f0ee6 |
| publicationDate |
1993-09-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
WO-9319126-A1 |
| titleOfInvention |
Production of an ethanol solution of ethyl or butyl half-ester of a copolymer |
| abstract |
A process for the production of an ethanol solution of an ethyl or butyl alkyl half-ester copolymer of maleic anhydride and an alkyl vinyl ether which comprises: (a) copolymerizing the monomers in acetone as solvent by simultaneously feeding molten maleic anhydride, a molar excess of methyl vinyl ether, and a solution of a free radical initiator in acetone, into a reactor precharged with acetone, at about 68-85 C, preferably 70-80 C; (b) esterifying the acetone solution of said copolymer with ethanol or butanol; and (c) solvent exchanging ethanol for acetone by continuously injecting vapors of ethanol at about 85-95C into said copolymer solution while simultaneously distilling out acetone therefrom at atmospheric pressure. |
| priorityDate |
1992-03-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |