| 摘要 |
The present invention relates to dihydroxydiphenylcycloalkanes of the formula (I) <IMAGE> in which R<1> and R<2>, independently of one another, are hydrogen, halogen, C1-C8-alkyl, C5-C6-cycloalkyl, C6-C10-aryl or C7-C12- aralkyl, m is an integer from 4 to 7, R<3> and R<4>, individually selectable for each X, are, independently of one another, hydrogen or C1-C6-alkyl, and X is carbon, with the proviso that R<3> and R<4> on at least one atom X are simultaneously alkyl, to a process for their preparation, and to the use of the diphenols of the formula (I) for the preparation of high-molecular-weight polycarbonates.
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| 申请人 |
BAYER AG, 5090 LEVERKUSEN, DE |
发明人 |
FREITAG, DIETER, DIPL.-CHEM. DR., 4150 KREFELD, DE;WESTEPPE, UWE, DIPL.-CHEM. DR., 4120 METTMANN, DE;WULFF, CLAUS, DIPL.-CHEM. DR., 4150 KREFELD, DE;FRITSCH, KARL-HERBERT, DIPL.-CHEM. DR., 5060 BERGISCH GLADBACH, DE;CASSER, CARL, DIPL.-CHEM. DR., 5300 BONN, DE;WEYMANS GUENTHER DR;SCHRADER LUTZ DR;WALDENRATH WERNER DR |
