Photocrosslinkable materials

Diamine compound of formula (I):

• wherein,
• A represents an unsubstituted or substituted carbocyclic or heterocyclic aromatic group selected from a monocyclic ring of five or six atoms, two adjacent monocyclic rings of five or six atoms, a bicyclic ring system of eight, nine or ten atoms, or a tricyclic ring system of thirteen or fourteen atoms;
• and
• wherein the following compound residue of formula (I), the compound of formula (Ia)
• represents a straight-chain or branched C1-C16fluoroalkyl group, wherein
• F is fluorine, and
• x1 is an integer from 1 to 15,
• B represents a straight-chain or branched C1-C16alkyl group, which is in addition to its fluorine unsubstituted or substituent(s) substituted by di-(C1-C16alkyl)amino, C1-C6alkyloxy, nitro, cyano and/or chlorine;
• and wherein one or more —CH2— group may independently from each other be replaced by a linking group;
• D represents an unsubstituted or substituted, aliphatic, aromatic and/or alicyclic diamine group having from 1 to 40 carbon atoms,
• E represents an aromatic group, an oxygen atom, a sulphur atom, —NH—, —N(C1-C6alkyl)-, —CR2R3,
• wherein R2 and R3 are independently from each other hydrogen or a cyclic, straight-chain or branched, substituted or unsubstituted C1-C24alkyl, wherein one or more —CH2— group(s) may be independently from each other replaced by a linking group, and with the proviso that at least one of R2 and R3 is not hydrogen;
• S1, S2 each independently from each other represents a spacer unit;
• X, Y each independently from each other represents hydrogen, fluorine, chlorine, cyano, unsubstituted or with fluorine substituted C1-C12alkyl, in which one or more —CH2— groups may be replaced by a linking group;
• n, n1 each independently from each other represents 1, 2, 3 or 4,
• with the proviso that if n is 2, 3, or 4, each A, B, x1, D, E, S1, S2, X, Y are identical or different;
• and if n1 is 2, 3 or 4 each B, X1 is identical or different.