http://rdf.ncbi.nlm.nih.gov/pubchem/patent/DE-4233532-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_19229e7660cdeb755c98d9c46f655217 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G73-1064 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G73-14 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G73-10 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G73-14 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G73-10 |
| filingDate | 1992-10-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_43f8b1457375c62265ab11688d0348a6 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_e21a005f247c368aead7cd87821291ae http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d46fe3bab950565115e5ca131e998538 |
| publicationDate | 1994-04-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | DE-4233532-A1 |
| titleOfInvention | Thermostable polyimides and polyamideimides with modified benzhydrol structural elements and their production |
| abstract | New thermostable polyimides and polyamide-imides are of formula (I): Ar = p-phenylene (Phe), m-phenylene (Phe'), 4-methyl-1,3-phenylene, 2-methyl-1,4-phenylene and/or -Phe-A-Phe-; A = -ch2-, -CMe2-, -O-, -S-, -SO2-, -SO-, -CO-, -COO-, -CO-NH-, -NH-, -N(1-20 C alkyl)-, -N=N- or -SP-he-SO2-Phe-S-; X = -Phe-NH-CO-, -Phe'-NH-CO- or 1,3-dioxo-isoindolin-2,5-diyl; Z = opt. (poly)unsatd. 2-20C acyl or 7-20C aroyl, opt. substd. by halogen and some but not all Z may = H; n = 2-100; m = 0-100; if m = over 1, the (-NH-CO-X-Ar-) gp. is statistically distributed. (I) are prepd. (claimed by: a) reacting 3,3',4,4'-benzhydrol-tetracarboxylic acid dimethyl ester (II) with diamines of the formula H2N-Ar-NH2 and, if m = over 0, also with trimellitic or (iso)phthalic acid (derivs.) in an inert diluent; b) chemical or thermal cyclisation of the poly(amide)amic acid to a poly(amide)-imide of formula (I) with Z = H; and c) reaction with acid chloride or anhydrides of the formula Z-Cl or Z-O-Z in an inert diluent. USE/ADVANTAGE - (I) can be made into fibres or films. (I) are extremely thermostable and are soluble and/or fusible in the cyclised form and hence can be processed easily by conventional methods. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8673540-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8349539-B2 |
| priorityDate | 1992-10-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
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