http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-781416-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_043c6a4e90e797f67a0e5cb252d30c56 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G59-68 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G59-688 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G59-68 |
| filingDate | 1956-02-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1957-08-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-781416-A |
| titleOfInvention | Process for curing polyepoxides |
| abstract | The curing of polyepoxides with a polycarboxylic acid anhydride is effected in presence of an organo substituted phosphine, arsine stibine, or bismuthine as activator; thereby enabling the polyepoxide to be cured at room temperatures and very quickly at elevated temperatures. Suitable activators are trioctyl phosphine, diphenyl cyclohexyl phosphine, trihexenyl phosphine, trixylyl phosphine, triethyl phosphine, cyclohexyl phosphine and similarly substituted arsines, stibines and bismuthines. About 0.8 to 1.5 equivalents of the anhydride are used per polyepoxide and from 0.1-4 per cent of phosphine by weight of resin. The polyepoxide is liquefied before admixture with the anhydride and phosphine by melting or by solution in acetone, dibutyl phthalate, or liquid monoepoxy compounds, e.g. glycidylallylether or cyano-substituted hydrocarbons, e.g. acetonitrile; mixtures of liquid and solid epoxides may be used. The cure may be effected at 15-20 DEG C. or rapidly at 50-110 DEG C., examples of polyepoxides used are epoxidized triglycerides, epoxyethers of polyhydric phenols or alcohols, glycidyl ethers of novolak resins, glycidyl ethers of polyhydricphenols having two hydroaryl groups separated by an aliphatic chain of at least 6 C atoms, e.g. those derived by condensing phenol with cardanol and like phenols having an unsaturated side chain; polyepoxides reacted with polyhydric alcohols, polyepoxides from diglycidyl phthalates and like polybasic acids; polymers of allyl glycidyl ethers. In examples: 100 parts polyallylglycidyl ether, 100 parts hexahydrophthalic anhydride and 3 parts triphenyl phosphine were poured into a metal cup; after standing 18 hours the mixture set to form a hard casing; on heating to 50 DEG C. the mixture set in 6 hours. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/DE-3151540-A1 |
| priorityDate | 1955-02-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 51.