| abstract |
A compound of formula (I): wherein MG<1 >and MG<3 >each independently represent an optionally-substituted aliphatic group with 1 to 80 C-atoms, in which one or more C-atoms may be replaced by a heteroatom, in such a way that oxygen atoms are not linked to one another; or an optionally-substituted aromatic or non-aromatic carbocyclic or heterocyclic ring system, with 1 to 80 C-atoms; and MG<2 >represents a group comprising at least two and up to four optionally-substituted aromatic or non-aromatic carbocyclic or heterocyclic ring systems, with 1 to 80 C-atoms, wherein, when MG<2 >represents a group comprising four optionally-substituted ring systems, at least three of the ring systems are aligned in between B<1 >and B<2>. The groups MG<1>, MG<2 >and MG<3 >in these new "staircase molecules" may be selected so that each one has one or more of the properties which are required in an LCP material prepared by polymerizing the compound. |