Polymerisable liquid crystal material and polymerised liquid crystal film

A polymerisable LC material comprising:

• at least one di- or multireactive mesogenic compound selected from the group of compounds of formula I,
• wherein
• A11 denotes
• P11 and P12 each denote, independently from one another, a polymerisable group,
• Sp11 and Sp12 each denote, independently from one another, a spacer group or a single bond,
• X11 and X12 each denote, independently from one another, —O—, —S—, —CO—, —COO—, —OCO—, —O—COO—, —CO—NRxx—, —NRxx—CO—, —NRxx—CO—NRyy—, —OCH2—, —CH2O—, —SCH2—, —CH2S—, —CF2O—, —OCF2—, —CF2S—, —SCF2—, —CF2CH2—, —CH2CF2—, —CF2CF2—, —CH═N—, —N═CH—, —N═N—, —CH═CRxx—, —CYxx═CYyy—, —C≡C—, —CH═CH—COO—, —OCO—CH═CH— or a single bond,
• Rxx and Ryy each, independently of one another, denote H or alkyl having 1 to 12 C atoms, and
• Yxx and Yyy each, independently of one another, denote H, F, Cl or CN, and
• Z11 and Z12 each denote, independently from one another, —COO—, —OOC—, —OCOO—, —OOCO—, or a single bond;
• at least one monoreactive mesogenic compound selected from the group of compounds of formula II,
• wherein
• A21 denotes
• r is in each occurrence independently from another an integer from 1 to 4,
• L denotes F, Cl, CN, NO2, CH3, C2H5, C(CH3)3, CH(CH3)2, CH2CH(CH3)C2H5, OCH3, OC2H5, COCH3, COC2H5, COOCH3, COOC2H5, CF3, OCF3, OCHF2 or OC2F5,
• L21 denotes H, F, Cl, CN, CH3, C2H5, C(CH3)3, CH(CH3)2, CH2CH(CH3)C2H5, OCH3, OC2H5, COCH3, COC2H5, COOCH3, COOC2H5, CF3, OCF3, OCHF2 or OC2F5,
• p denotes 0, 1 or 2,
• P21 denotes a polymerisable group,
• R21 is H, alkyl, alkoxy, thioalkyl, alkylcarbonyl, alkoxycarbonyl, alkylcarbonyloxy or alkoxycarbonyloxy with 1 to 10 C atoms or more, or is Y
• Y is F, Cl, CN, NO2, OCN, SCN, or mono- oligo- or polyfluorinated alkyl or alkoxy with 1 to 4 C atoms,
• Sp21 denotes a spacer group or a single bond,
• X21 denotes each and independently from another —O—, —S—, —CO—, —COO—, —OCO—, —O—COO—, —CO—NRxx—, —NRxx—CO—, —NRxx—CO—NRyy—, —OCH2—, —CH2O—, —SCH2—, —CH2S—, —CF2O—, —OCF2—, —CF2S—, —SCF2—, —CF2CH2—, —CH2CF2—, —CF2CF2—, —CH═N—, —N═CH—, —N═N—, —CH—CRxx—, —CYxx═CYyy—, —C≡C—, —CH═CH—COO—, —OCO—CH═CH— or a single bond,
• Rxx and Ryy each, independently of one another, denote H or alkyl having 1 to 12 C atoms,
• Yxx and Yyy each, independently of one another, denote H, F, Cl or CN,
• Z21 is —C≡C—, —COO—, —OOC—, —OCOO—, —OOCO—, or a single bond;
• at least one carbazole oxime ester photoinitiator;
• and
• one or more compounds of formula ND,
• wherein
• U1,2 are independently of each other selected from
• including their mirror images, wherein the rings U1 and U2 are each bonded to the group —(B)q— via the axial bond, and one or two non-adjacent CH2 groups in these rings are optionally replaced by O and/or S, and the rings U1 and U2 are optionally substituted by one or more groups L,
• Q1,2 are independently of each other CH or SiH,
• Q3 is C or Si,
• B is in each occurrence independently of one another —C≡C—, —CY1═CY2— or an optionally substituted aromatic or heteroaromatic group,
• Y1,2 are independently of each other H, F, Cl, CN or R0,
• q is an integer from 1 to 10,
• A1-4 are independently of each other selected from non-aromatic, aromatic or heteroaromatic carbocyclic or heterocyclic groups, which are optionally substituted by one or more groups R5, and wherein each of -(A1-Z1)m—U1—(Z2-A2)n- and -(A3-Z3)o—U2—(Z4-A4)p- does not contain more aromatic groups than non-aromatic groups,
• Z1-4 are independently of each other —O—, —S—, —CO—, —COO—, —OCO—, —O—COO—, —CO—NR0—, —NR0—CO—, —NR0—CO—NR00—, —OCH2—, —CH2O—, —SCH2—, —CH2S—, —CF2O—, —OCF2—, —CF2S—, —SCF2—, —CH2CH2—, —(CH2)3—, —(CH2)4—, —CF2CH2—, —CH_CF2—, —CF2CF2—, —CH═CH—, —CY1═CY2—, —CH═N—, —N═CH—, —N═N—, —CH═CR0—, —C≡C—, —CH═CH—COO—, —OCO—CH═CH—, CR0R00 or a single bond,
• R0 and R00 are independently of each other H or alkyl with 1 to 12 C-atoms,
• m and n are independently of each other 0, 1, 2, 3 or 4,
• o and p are independently of each other 0, 1, 2, 3 or 4,
• R1-5 are independently of each other identical or different groups selected from H, halogen, —CN, —NC, —NCO, —NCS, —OCN, —SCN, —C(═O)NR0R00, —C(═O)X0, —C(═O)R0, —NH2, —NR0R00, —SH, —SR0, —SO3H, —SO2R0, —OH, —NO2, —CF3, —SF5, P-Sp-, optionally substituted silyl, or carbyl or hydrocarbyl with 1 to 40 C atoms that is optionally substituted and optionally comprises one or more hetero atoms, or denote P or P-Sp-, or are substituted by P or P-Sp-, wherein the compounds comprise at least one group R1-5 denoting or being substituted by P or P-Sp-,
• P is a polymerisable group,
• Sp is a spacer group or a single bond.