Polymerizable composition and optically anisotropic body using same

A polymerizable composition comprising:

• a) a polymerizable compound having one or more polymerizable groups and satisfying formula (I):
• Re(450 nm)/Re(550 nm)<1.0 (I)
• wherein Re(450 nm) is an in-plane retardation at a wavelength of 450 nm when the polymerizable compound having one or more polymerizable groups is aligned on a substrate such that the direction of long axes of molecules of the polymerizable compound is substantially horizontal to the substrate, and Re(550 nm) is an in-plane retardation at a wavelength of 550 nm when the polymerizable compound having one or more polymerizable groups is aligned on the substrate such that the direction of the long axes of the molecules of the polymerizable compound is substantially horizontal to the substrate;
• b) at least one photopolymerization initiator represented by formula (b-1):
• wherein R1s each independently represent a group selected from formula (R1-1) to (R1-4) and formula (R1-6) below:
• R2 represents a group selected from a single bond, —O—, —C(CH3)2, —C(OCH3)2, and —C(CH2CH3)—N(CH3)2;
• and R3 represents a group selected from formula (R3-1) to formula (R3-8) below:
• and
• c) a phenol-based polymerization inhibitor selected from the group consisting of a hydroquinone, methoxyphenol, methylhydroquinone, tert-butylhydroquinone, or tert-butylcatechol,
• wherein the polymerizable compound having one or more polymerizable groups and satisfying formula (I) comprises at least one selected from liquid crystalline compounds represented by general formula (1) and at least one selected from liquid crystalline compound represented by general formula (2):
• wherein P11 to P22 each represent any of general formulas (P-1) to (P-3):
• S11 to S22 each represent an alkylene group which has 1 to 20 carbon atoms and in which one —CH2— group or two or more nonadjacent —CH2— groups may be each independently replaced by —O—, —COO—, —OCO—, —OCO—O—, —CO—NH—, —NH—CO—, —CH═CH—, —C≡C—, or formula (S-1) below:
• when a plurality of S11s to S22s are present, they may be the same or different;
• X11 to X22 each represent —O—, —S—, —OCH2—, —CH2O—, —CO—, —COO—, —OCO—, —CO—S—, —S—CO—, —O—CO—O—, —CO—NH—, —NH—CO—, —SCH2—, —CH2S—, —CF2O—, —OCF2—, —CF2S—, —SCF2—, —CH═CH—COO—, —CH═CH—OCO—, —COO—CH═CH—, —OCO—CH═CH—, —COO—CH2CH2—, —OCO—CH2CH2—, —CH2CH2—COO—, —CH2CH2—OCO—, —COO—CH2—, —OCO—CH2—, —CH2—COO—, —CH2—OCO—, —CH═CH—, —N═N—, —CH═N—N═CH—, —CF═CF—, —C≡C—, or a single bond provided that each P—(S—X)— bond contains no —O—O—;
• when a plurality of X11s to X22s are present, they may be the same or different;
• MG11 to MG21 each independently represent formula (a):
• wherein A11 and A12 each independently represent a 1,4-phenylene group, a 1,4-cyclohexylene group, a pyridine-2,5-diyl group, a pyrimidine-2,5-diyl group, a naphthalene-2,6-diyl group, a naphthalene-1,4-diyl group, a tetrahydronaphthalene-2,6-diyl group, a decahydronaphthalene-2,6-diyl group, or a 1,3-dioxane-2,5-diyl group, each of which may be unsubstituted or substituted by at least one L1;
• when a plurality of A11s and/or A12s are present, they may be the same or different;
• Z11 and Z12 each independently represent —O—, —S—, —OCH2—, —CH2O—, —CH2CH2—, —CO—, —COO—, —OCO—, —CO—S—, —S—CO—, —O—CO—O—, —CO—NH—, —NH—CO—, —SCH2—, —CH2S—, —CF2O—, —OCF2—, —CF2S—, —SCF2—, —CH═CH—COO—, —CH═CH—OCO—, —COO—CH═CH—, —OCO—CH═CH—, —COO—CH2CH2—, —OCO—CH2CH2—, —CH2CH2—COO—, —CH2CH2—OCO—, —COO—CH2—, —OCO—CH2—, —CH2—COO—, —CH2—OCO—, —CH═CH—, —N═N—, —CH═N—, —N═CH—, —CH═N—N═CH—, —CF═CF—, —C≡C—, or a single bond;
• when a plurality of Z11s and/or Z12s are present, they may be the same or different;
• M represents a group selected from formula (M-1) to formula (M-2) below:
• the groups represented by formula (M-1) to formula (M-2) may be unsubstituted or substituted by at least one L1;
• G is formula (G-1) below:
• wherein R3 represents a hydrogen atom or an alkyl group having 1 to 20 carbon atoms, the alkyl group being linear or branched, wherein the branched alkyl has 3 to 20 carbon atoms, any hydrogen atom in the alkyl group being optionally replaced by a fluorine atom, one —CH2— group or more nonadjacent —CH2— groups in the alkyl group being each independently optionally replaced by —O—, —S—, —CO—, —COO—, —OCO—, —CO—S—, —S—CO—, —O—CO—O—, —CO—NH—, —NH—CO—, or —C≡C—;
• W81 represents formula (W-a-5):
• wherein s represents an integer from 0 to 4;
• W82 represents a hydrogen atom or an alkyl group having 1 to 20 carbon atoms, the alkyl group being linear or branched, wherein the branched alkyl has 3 to 20 carbon atoms, any hydrogen atom in the alkyl group being optionally replaced by a fluorine atom, one —CH2— group or more nonadjacent —CH2— groups in the alkyl group being each independently optionally replaced by —O—, —S—, —CO—, —COO—, —OCO—, —CO—S—, —S—CO—, —O—CO—O—, —CO—NH—, —NH—CO—, or —C≡C—;
• the meaning of W82 may be the same as the meaning of W81;
• L1 represents a fluorine atom, a chlorine atom, a bromine atom, an iodine atom, a pentafluorosulfuranyl group, a nitro group, an isocyano group, an amino group, a hydroxyl group, a mercapto group, a methylamino group, a dimethylamino group, a diethylamino group, a diisopropylamino group, a trimethylsilyl group, a dimethylsilyl group, a thioisocyano group, or an alkyl group having 1 to 20 carbon atoms, the alkyl group being linear or branched, wherein the branched alkyl has 3 to 20 carbon atoms, any hydrogen atom in the alkyl group being optionally replaced by a fluorine atom, one —CH2— group or more nonadjacent —CH2— groups in the alkyl group being each independently optionally replaced by a group selected from —O—, —S—, —CO—, —COO—, —OCO—, —CO—S—, —S—CO—, —O—CO—O—, —CO—NH—, —NH—CO—, —CH═CH—COO—, —CH═CH—OCO—, —COO—CH═CH—, —OCO—CH═CH—, —CH═CH—, —CF═CF—, and —C≡C—;
• when a plurality of L1s are present in the compound, they may be the same or different;
• j11 represents an integer from 1 to 5;
• and j12 represents an integer of 1 to 5 while j11+j12 is an integer from 2 to 5;
• R11 each represent a hydrogen atom, a fluorine atom, a chlorine atom, a bromine atom, an iodine atom, a pentafluorosulfuranyl group, a cyano group, a nitro group, an isocyano group, a thioisocyano group, or an alkyl group having 1 to 20 carbon atoms, the alkyl group being linear or branched, wherein the branched alkyl has 3 to 20 carbon atoms, any hydrogen atom in the alkyl group being optionally replaced by a fluorine atom, one —CH2— group or more nonadjacent —CH2— groups in the alkyl group being each independently optionally replaced by —O—, —S—, —CO—, —COO—, —OCO—, —CO—S—, —S—CO—, —O—CO—O—, —CO—NH—, —NH—CO—, or —C≡C—;
• m11 represents an integer of 0 to 8;
• and m2 and m3 each independently represent an integer from 0 to 5.