Blue phase liquid crystal composition

A liquid crystal composition comprising:

• a liquid crystal material capable of forming a blue phase,
• a first polymerizable monomer for crosslinking, and
• a second polymerizable monomer,
• wherein at least one of said first and said second polymerizable monomers has a liquid crystal side chain, with the proviso that when the first polymerizable monomer is 2-methyl-1,4-phenylene bis{4-[3-(acryloyloxy) propyloxy]benzoate}, said first polymerizable monomer for crosslinking is present in said composition at a concentration of 2.8 mol % to 10 mol %,
• wherein said second polymerizable monomer is selected from the group consisting of a mixture of acrylic acid 4-(4-pentyl-phenylethynyl)-phenyl ester and acrylic acid 4(4propyl-cyclohexylethynyl)-phenyl ester, 3,5-difluoro-benzoic acid 4-(5-acryloyloxy-pentyloxy)-phenyl ester, 2-methyl-acrylic acid 5-(4′-cyano-biphenyl-4-yloxy)-pentyl ester,
• wherein X is attached at any position of the aromatic system and is one of the following:
• —H, —Cl, —F, —Br, —I, —OH, —CF3, —OCF3, —CN, —NO2, —SF3, —OSF3, —COOR, —OR, —SCN, —NCS,
• wherein Z is (CH2)n where n is 0 to 22,
• wherein W is —C≡C—, ′—RC═CR′—, O, S, NR, —COO, —OCO—, R′ being CmH2m where m is 0 to 22, R being H or CnH2n+1, where n is 0 to 22,
• wherein Y is one of the following:
• phenyl, biphenyl, triphenyl, or cyclohexyl, each of which is optionally and independently substituted by one or more of the following substituents at any position:
• —H, —Cl, —F, —Br, —I, —OH, —OCH3—CF3, —OCF3, —CN, —NO2, —SF3, —OSF3, —COOR wherein R is —(CH2)nCH3 where n is 0 to 22,
• wherein V is —(CH2)nCH3 where n is 0 to 22, and
• wherein R is H or CnH2n+1 where n is 0 to 22.