http://rdf.ncbi.nlm.nih.gov/pubchem/patent/ES-357008-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_866088b697cf9d9a1316e0df21c5f861 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G73-12 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G73-1003 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G18-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G73-12 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G73-10 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G18-34 |
| filingDate | 1968-08-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1970-02-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | ES-357008-A1 |
| titleOfInvention | PROCEDURE FOR OBTAINING HIGH PE-SO MOLECULAR POLYMIDES. |
| abstract | In the production of polyimides imide linkages formed by reaction at 0 to 450 C of (a) a cyclic dicarboxylic anhydride with (b) a carbamic or thiocarbamic acid ester of an aliphatic or araliphatic alcohol. Reactant (b) may have the formula where R 1 is a (z + 1) valent aliphatic or aromatic radical R 2 is an aliphatic or araliphatic radical z is 1 or 2 and X is -[-NH-COO-R 2 ], -OH, -NH 2 or -NCO. The anhydride (a) may contain 1 to 3 cyclic anhydride groups and when there is only 1, at least one other group capable of polycondensation reaction it may be formed in situ. Numerous reactants (a) and (b) are mentioned. Other polyfunctional reactants, e.g. diamines, polyols, polycarboxylic acids or polyisocyanates may also be present. Reaction may be effected in various solvents in the presence of catalysts, fillers, pigments or polyesters giving products suitable for lacquers, films and mouldings. In specific examples the following reactants are used:-(a) trimellitic and pyromellitic anhydrides and bis (trimellitic anhydride) glycol ester (b) bis (methoxycarbonylamino)-diphenyl ether and the carbamic esters from diphenyl, diphenylmethane or propane, tolylene or hexamethylene diisocyanate and glycol, butanol or hexane diol. Adipic acid is also used in Ex. 6. The lacquers are applied to glass or metal plates and stored. |
| priorityDate | 1967-08-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 36.