Cas no:89-32-7 PMDA Pyromellitica dianhydride
Breves
Pyromellitica dianhydride (PMDA), producta pura crystallis albis orslightly flavis.Aeri humido exposita cito absorbmoistura ex aere et hydrolyzata in acido pyromellitico. Solvitur in sulfoxide, dimethylformamide, acetone et aliis solventibus organicis, in aethere, chloroformando benzene insolubili.Maxime usus est ut materia rudis polyimide, et crosslinking agens ad fabricandum epoxy curationis agentis et resinae polyester extinctionis.
Acidum pyromelliticum (PMA), notum etiam ut 1,2,4,5-benzenetetracarboxylicacidum, album ad crystallum pulverulentum luteo, maxime adhibetur in thesynthesi polyimidis, octyli pyromelliatis, etc., est principale rudis materia ad productionem agentis curationis. .
| ITEM | PMDA | PMA |
| Puritas cum% | 99.5% | 99% |
| Residua Acetone PPM | 1500 | / |
| Liquescens punctum | 284~ 288 | / |
| Color | Alba ad flavescens | album |
| Free Acidum cum% | 0.5 | / |
| Magnitudo particula | In elit postulant | In elit postulant |
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