http://rdf.ncbi.nlm.nih.gov/pubchem/patent/TW-200420611-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_c72d118f5664072de841f9c5c34b9d99 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G64-307 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G64-30 |
| filingDate | 2003-11-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_32c627ce9517b1a9e16bca276d86a733 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_efab709a1ec9831f5cf7829dcd8ec4d8 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_b8dd14874a5babd07b04fc2a82fcae92 |
| publicationDate | 2004-10-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | TW-200420611-A |
| titleOfInvention | Method for making stable, homogeneous melt solutions |
| abstract | Stable, homogeneous melt solutions are prepared at temperatures of 200 DEG C or less from solid mixtures comprising at least one diaryl carbonate, at least one high melting dihydroxy aromatic compound (mp > 200 DEG C), a transesterification catalyst, and optionally a lower melting dihydroxy aromatic compound. Thus, a stable, homogeneous melt solution is obtained from a solid mixture comprising 4,4'-biphenol (mp 282-284 DEG C) at a temperature of about 200 DEG C using either diphenyl carbonate or bis(methyl salicyl) carbonate as the diaryl carbonate component. It is shown that formation of the stable, homogeneous melt solutions requires the presence of the transesterification catalyst when substantial amounts of the high melting dihydroxy aromatic compound are present in the initial solid mixture. Solid mixtures comprising a variety of high melting bisphenols; 4,4'-biphenol; 3,3,3,3'-tetramethylspirobiindanbisphenol, and 4,4'-sulfonyldiphenol are converted to stable, homogeneous melt solutions at 200 DEG C, a temperature substantially blow the melting points of the high melting bisphenols in their pure states. |
| priorityDate | 2002-11-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 23.