Cas nhamba:89-32-7 PMDA Pyromellitic dianhydride
Sumo pfupi
Pyromellitic dianhydride (PMDA), zvigadzirwa zvakachena zvichena kana zvishoma yellow makristasi.Inoratidzwa kumhepo yakanyorova inokurumidza kunwa hunyoro kubva mumhepo uye hydrolyzed muPyromellitic Acid.Inonyanya kushandiswa seyakagadziriswa polyimide, uye crosslinking agent yekugadzira epoxy kurapa agent uye polyester resin kupera.
Pyromellitic acid(PMA), inozivikanwawo se 1,2,4,5-benzenetetracarboxylicacid, chena kusvika kuyero yehupfu crystal, inonyanya kushandiswa mukugadzirwa kwe polyimide, octyl pyromelliate, zvichingodaro, ndiyo inonyanya kushandiswa pakugadzirwa kweanorapa matting agent. .
| ITEM | PMDA | PMA |
| Purity wt% | 99.5% | 99% |
| Residual Acetone PPM | 1500 | / |
| Melting point | 284~288 | / |
| Color | Muchena kuita yellowish | chena |
| Asidi Yemahara wt% | 0.5 | / |
| Chikamu saizi | Pakuda kwevatengi | Pakuda kwevatengi |
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