Patent ID: 6228977
Filing Date: 2001-05-08
Classification: G02F

Abstract:
A nonlinear optically active copolymer, comprising a polyadduct of(a) at least one organic cyanate having at least two cyanate groups, and(b) a nonlinear optically active compound with the following structure: ##STR13##in whichn is 2 to 6,R.sup.6, R.sup.7, and R.sup.8 are independently of one another an H atom, a straight-chain or branched-chain C.sub.1 - to C.sub.20 -alkyl residue which is interrupted by 0 to 5 ether oxygen groups, or a phenyl, naphthyl, thienyl, thiazolyl or pyridyl residue,D is O, S or NR.sup.9, whereby R.sup.9 is a hydrogen atom, a straight-chain or branched-chain C.sub.1 - to C.sub.20 -alkyl residue which is interrupted by 0 to 5 ether oxygen groups, a benzyl residue or a phenyl or naphthyl residue,L is O, COO or OCO,E is OH, NH.sub.2, OCN or a residue with the structure ##STR14##wherein G is O, OCO (O at CH.sub.2) or NR.sup.10, wherebyR.sup.10 is an H atom or a straight-chain C.sub.1 - to C.sub.6 -alkyl residue,Z is an electron-acceptor substituted methylene or imino group,X is S, O, NR.sup.11 or a ring double bond or ##STR15##wherein R.sup.11 is a hydrogen atom, a straight-chain or branched-chain C.sub.1 - to C.sub.20 -alkyl residue or a phenyl or naphthyl residue and T is CH or N or Z and T together form a structure of type .dbd.N--SO.sub.2 --C , .dbd.N--CS--C or .dbd.N--CO--C, andQ is a CH-- or CR.sup.12 -group or N, whereby R.sup.12 is a straight-chain or branched-chain C.sub.1 - to C.sub.20 -alkyl residue or a phenyl or naphthyl residue.