1
Willi Kreuder, Peter Neumann, Karl Heinz Etzbach, Hans Josef Sterzel, Helmut Ringsdorf: Polymers which form liquid-crystalline phases. BASF Aktiengesellschaft, Keil & Weinkauf, September 12, 1989: US04865762 (14 worldwide citation)

Polymers contain, as mesogenic groups, groups which produce a discotic phase, and furthermore can contain pleochroic dyes.


2
Helmut Ringsdorf, Willi Kreuder, Peter Neumann, Karl Heinz Etzbach, Hans Josef Sterzel: Polymers which form liquid-crystalline phases. BASF Aktiengesellschaft, Keil & Weinkauf, December 25, 1990: US04980081 (7 worldwide citation)

Polymers contain, as mesogenic groups, groups which produce a discotic phase, and furthermore can control pleochroic dyes.