http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-H02251527-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_95585944cd76ddfb6dc33ed2a0b84403 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G02B1-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G65-40 |
| filingDate | 1989-03-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a0681a69c86c9d1687653dff566aedf4 |
| publicationDate | 1990-10-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | JP-H02251527-A |
| titleOfInvention | Aromatic polymer, optical transparent member utilizing same and production of same |
| abstract | PURPOSE: To obtain the subject polymer having both high refractive index and heat resistance, thus useful as a raw material for optical lens by reaction between each specific pyridine and phenylmethane in the presence of an alkali metal compound. n CONSTITUTION: A reaction is carried out in an organic solvent in the presence of an alkali metal compound between (A) a 2,6-dihalogenopyridine of formula l (X 1 and X 2 are each halogen) and (B) a 4,4'-dihydroxytetraphenylmethane of formula II (R 1 -R 4 are each H, halogen, 1 to 4C alkyl, phenyl or cyclohexyl), thus obtaining the objective polymer made up of recurring unit of formula III ≥0.1dl/g in reduced viscosity in the form of its p-dichlorobenzene solution at a concentration of 0.2 g/dl at 60°C. n COPYRIGHT: (C)1990,JPO&Japio |
| priorityDate | 1989-03-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 23.