| 摘要 |
In a process for producing a prepolymer epoxy resin mixture with oxazolidinone structures, a filler-containing thermally polymerizable reaction resin mixture of polyepoxy resin, consisting of a mixture of bi- and multifunctional epoxy resins, and polyisocyanate resin, with a molar ratio of the epoxy groups to the isocyanate groups of > 1, is fed to a continuously working reactor. With substituted imidazole as reaction accelerator, amounting to 0.5-2.5 % of the polyepoxy resin, the reaction resin mixture is then reacted at temperatures up to 200 DEG C, with reactor temperature at 140-190 DEG C, and following that the extruded material is cooled down to < 50 DEG C with the aid of a cooling device mounted at the extrusion die outlet of the reactor.
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| 申请人 |
SIEMENS AG, 80333 MUENCHEN, DE |
发明人 |
MARKERT, HELMUT, DIPL.-CHEM. DR., 8500 NUERNBERG, DE;KRETZSCHMAR, KLAUS, DIPL.-CHEM. DR., 8520 ERLANGEN, DE;SCHREYER, MICHAEL, DIPL.-CHEM. DR., 8521 WEISENDORF, DE;MENNIG, GUENTHER, PROF. DR., 6100 DARMSTADT, DE;BRAUN, PETER, DIPL.-ING., 6303 HUNGEN, DE;EITEL, OLIVER, DIPL.-ING., 7105 LEINGARTEN, DE |
