Basf Aktiengesellschaft

Herbert Bender

Peter Neumann

Hubert Trauth

Alexander Aumueller

Gerd Blinne

Reinhard Kemper

Reinhard Helwig

Horst Colberg

Friedhelm Teich

Dihydroquinacridones, quinacridones and quinacridonequinones are prepared by cyclizing 2,5-dianilino-3,6-dihydroterephthalic acid derivatives or 2,5-dianilinoterephthalic acid derivatives in the liquid or solid state or in solution, in each case in finely divided form, or in the gas phase, in the presence or absence of an oxidizing agent.

Preparation of dihydroquinacridones, quinacridones and

The novel phenol derivatives of the general formula (I) ##STR1## where R is hydrogen, straight-chain or branched C.sub.1 -C.sub.8 -alkyl or cycloalkyl, A is a bridge member and B is a radical of the formula ##STR2## where R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5 and T.sup.1 independently of one another are each hydrogen, C.sub.1 -C.sub.8 -alkyl, halogen, CN, COOT.sup.2 or CONHT.sup.2, with the proviso that one or more of the radicals R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5 and T.sup.1 are halogen, CN, COOT.sup.2 and CONHT.sup.2 and T.sup.2 is C.sub.1 -C.sub.8 -alkyl, are useful for stabilizing organic material, in particular polyolefins, to degradation by oxidation.

3-tert-butyl-4-hydroxyphenylpropionic acid amino-alkylamide derivatives

Branched, high molecular weight, thermoplastic polyarylene ethers which contain nitrile groups and are composed of repeating units of the formula I

Branched, high molecular weight, thermoplastic polyarylene ethers

Growing community of inventors

Boehl-Iggelheim, Germany

Herbert Bender