Patent ID: 8105662
Filing Date: 2012-01-31
Classification: C09K

Abstract:
1. A mesogenic, cross-linkable mixture comprising: i) a cross-linkable liquid crystalline host comprising at least one cross-linkable liquid crystalline compound, and ii) at least one chiral or achiral rod shaped additive component, wherein the additive component is a compound of formula (I): wherein: C connected to each other at the opposite positions via the bridging groups Z wherein A wherein at least one of A wherein: P is hydrogen or a polymerizable group which is CH CH Sp has the meaning of formula (III) wherein: Y B R n such that 1≦n m m wherein: one or more —CH k is 0 or 1, with the proviso that in at least one A X is —O—, —CO—, —COO—, —OCO—, —CH═CH—, —C≡C—, or a single bond, t is 1; or wherein at least one of A wherein: P is hydrogen or a polymerizable group which is CH Sp has the meaning of formula (III) wherein: Y B R n m and wherein one or more —CH with the proviso that the carbon-carbon double bond of P is not directly connected to the carbon atom of Y 1 or Y 2 , k is 0 or 1, with the proviso that at in least one of A X is —O—, —CO—, —COO—, —OCO—, —CH═CH—, —C≡C—, or a single bond, t is 1; A in which: P is hydrogen or a polymerizable group which is CH wherein: W is H, CH R″ is a C Sp is a C with the proviso that at least one of A Z a1, a2 and a3 are independently from each other integers from 0 to 3, such that with the proviso that the sequence:  describes the long molecular axis of the rod shaped additive components and wherein the additive component changes from the liquid crystalline state to the isotropic state at a temperature of 20° C. or lower.