Patent ID: 7491752
Filing Date: 2009-02-17
Classification: C08F,C09K,G02F,Y10S,Y10T

Abstract:
1. Photoreactive dendrimers comprising a core portion, branching units and terminal groups, wherein at least one terminal group and/or branching unit is a photoreactive group, wherein the photoreactive groups are represented by the general formulae Ia and Ib: wherein the broken line indicates the point of linkage to the outermost generation of the dendrimer and A represents pyrimidine-2,5-diyl, pyridine-2,5-diyl, 2,5-thiophenylene, 2,5-furanylene, 1,4- or 2,6-naphthylene; or phenylene, which is unsubstituted or mono- or poly-substituted by fluorine, chlorine 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 C represents a group selected from —O—, —CO—, —CO—O—, —O—CO—, —NR B represents hydrogen, or a group which is able to react or interact with a second material like polymers, oligomers, monomers, photoactive polymers, photoactive oligomers and/or photoactive monomers or surfaces; S D represents a group selected from —O—, —CO—, —CO—O—, —O—CO—, —NR Q represents oxygen or —NR X, Y each independently of the other represents hydrogen, fluorine, chlorine, cyano, alkyl optionally substituted by fluorine having 1 to 12 carbon atoms in which optionally one or more non-adjacent alkyl —CH