Patent · US Expired

Polymer compositions exhibiting liquid-crystalline phases

US4713196A · kind A · utility

29Cited by

5References

16Claims

0Family size

Assignee

Merck Patent GmbH · DE

Inventors

Klaus Praefcke · Berlin, DE
Bernd Kohne · Berlin, DE
Eike Poetsch · Mühltal, DE
Claus P. Herz · Heidelberg, DE

Key dates

Filing date	Aug 16, 1985
Grant date	Dec 15, 1987
Priority date	—
Expiry date	Aug 16, 2005

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC09K19/3833
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

Abstract

Polymer compositions exhibiting liquid-crystalline phases contain chemically bonded mesogenic groups of the formula Ia and/or Ib: ##STR1## in which Q.sup.1 is H, alkyl or alkoxy having 1-5 C atoms, F, Cl, Br or CN, PA0 X.sup.1 to X.sup.5 each, independently of one another, are H or an alkyl group having up to 15 C atoms, in which it is also possible for one or two non-adjacent CH.sub.2 groups to be replaced by a group from the group comprising --O--, --S--, --O--CO--O--, O--CO--NH--, --CO--, --CO--O--, --CO--S--, --S--CO--, --SO-- and --SO.sub.2 --. Process for the preparation of polymer compositions of this type comprises the polymerization or grafting of suitable monomers. Polymer compositions of this type are used as substrates in electronics for the fiber and foil techniques.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.