The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 18, 1993
Filed:
Aug. 31, 1989
Dirk Andrejewski, Munich, DE;
Magdi Gohary, Munich, DE;
Hans-Joachim Luckas, Munich, DE;
Rainer Winkler, Munich, DE;
Franz-Heinrich Kreuzer, Martinsried, DE;
Consortium fur elektrochemische Industrie GmbH, Munich, DE;
Abstract
The present invention relates to liquid-crystalline compounds and to a process for preparing liquid-crystalline polyorganosiloxanes having methacryloxy and/or acryloxy groups by the reaction of organosiloxanes having hydrogen atoms bonded directly to silicon atoms and/or organosilanes which can be condensed to form organosiloxanes having hydrogen atoms bonded directly to silicon atoms, with alkenes and/or alkynes having mesogenic groups, which comprises reacting in a first step the organosiloxanes with an alkene and/or alkyne having at least one non-enolic hydroxyl group protected by a protective group, and in a second step the protective group is removed and the hydroxyl group which is now free is esterified with (meth)acrylic acid, esters, anhydrides and/or halides thereof and thereafter optionally condensing the organosilanes to organosiloxanes.