Patent ID: 8436132

Claim:
A diamine compound represented by the general formula I: wherein A 1 and A 2 each independently represent a group represented by general formula II: wherein C 1 to C 3 each independently represent an aromatic or an alicyclic group, which is unsubstituted or mono- or poly-substituted by a cyano group or by halogen atoms, or by a cyclic, straight-chain or branched alkyl residue which is unsubstituted, mono- or poly-substituted by fluorine, chlorine, having 1 to 18 carbon atoms, wherein one or more non-adjacent —CH 2 — groups may independently be replaced by a group B; D represents a hydrogen atom, a halogen atom, a cyano group, or a straight-chain or branched alkyl residue which is unsubstituted, mono-substituted by cyano or fluorine, chlorine, or poly-substituted by fluorine, chlorine, having 1 to 24 carbon atoms, wherein one or more non-adjacent —CH 2 — groups may independently be replaced by a group B, or represents an organic group having a steroid skeleton; S 1 represents a single bond or straight-chain or branched alkylene group which is unsubstituted, mono or poly-substituted by fluorine, chlorine and cyano, having 1 to 24 carbon atoms, wherein at least in A 1 or A 2 : one —CH 2 — group is replaced by —CH═CH—, and wherein one or more —CH 2 — groups is independently be replaced by —CO—, —CO—O—, —O—CO—, —NR 1 —, —NR 1 —CO—, —CO—NR 1 —, —NR 1 —CO—O—, —O—CO—NR 1 —, —NR 1 —CO—NR 1 —, —CH═CH—, —C≡C—, —O—CO—O— and —Si(CH 3 ) 2 —O—Si(CH 3 ) 2 — and wherein R 1 represents a hydrogen atom or lower alkyl; Z 1 , Z 2 each independently of the other represent a single bond or a spacer unit which is a straight-chain or branched alkylene group which is unsubstituted, mono or poly-substituted by a cyano group or by halogen atoms, having 1 to 8 carbon atoms, wherein one or more non-adjacent —CH 2 — groups may independently be replaced by a group B; n1 to n3 are each independently 0 or 1; and B represents a group selected from —O—, —CO—, —CO—O—, —O—CO—, —NR 1 —, —NR 1 —CO—, —CO—NR 1 —, —NR 1 —CO—O—, —O—CO—NR 1 —, —NR 1 —CO—NR 1 —, —CH═CH—, —C≡C—, —O—CO—O— and —Si(CH 3 ) 2 —O—Si(CH 3 ) 2 — and wherein R 1 represents a hydrogen atom or lower alkyl, with the proviso that if n1=n2=n3=0 then D is a straight-chain or branched alkyl residue which is unsubstituted, mono-substituted by cyano or fluorine, chlorine, or poly-substituted by fluorine, chlorine, having 5 to 24 carbon atoms, wherein one or more non-adjacent —CH 2 — groups may independently be replaced by a group B, or represents a organic group having a steroid skeleton.