Light-polarizing films or sheets containing stilbene dyestuffs

Claim 2

Light-polarizing films or sheets containing dyestuffs which, in the form of the free acid, conform to the formula in which X signifies --CN, --CF 3 , halogen, R 1 CONH--, --COOH, --CONH 2 , --CONHR 1 , --CONR 1 R 2 , --COOR 1 , --OH, --OR:, --O--CO--R 1 , --N═N--Y 1 , or a substituted or unsubstituted heterocyclic radical, R 1 , R 2 signify alkyl, cycloalkyl, aryl or aralkyl, which may be interrupted by O and/or S, and Y, Y 1 signify a substituted or unsubstituted aryl or heterocyclic radical.

Claim 3

Light-polarizing films or sheets containing dyestuffs of claim 1 in which Y, R 1 are (A--N═N).sub.p L in which A is a substituted or unsubstituted phenylene or naphthalene radical, L is a substituted or unsubstituted phenyl or naphthyl radical and p is 1, 2, or 3.

Claim 4

Light-polarizing films or sheets containing dyestuffs of claim 1 where Y, Y 1 are ##STR51## in which R 3 signifies H, --OH, --OR 1 , --NH 2 , --NHR 1 , --NR 1 R 2 , --NH--COR 1 , --O--COR 1 , --N═N═R 11 , a heterocyclic radical, R 4 , R 5 , R 7 , R 8 , R 9 , R 10 signify H, halogen, --OH, --OR 1 , --NH 1 R 2 , --NHR 1 , --NR 1 R 2 , --R 1 , --SO 3 H, --NH--CO--R 1 , O--CO--R 1 , --SO 2 --NH 2 , --SO 2 --NHR 1 , --SO 2 --NR 1 R 2 , R 6 signifies H, --N═N═R 11 , a heterocyclic radical and R 11 signifies a substituted or unsubstituted aryl radical, preferably a substituted or unsubstituted phenyl or naphthyl radical or a substituted or unsubstituted heterocyclic radical containing a maximum of 8 azobridges.

Claim 5

Light-polarizing films or sheets containing dyestuffs of claim 1 in which Y, Y 1 and R 11 are radicals from the benzene series of the formula ##STR52## or radicals from the naphthalene series of the formulae ##STR53## in which R 12 ----OH, --NH 2 ##STR54## R 13 is H, if R 14 =--N═N--R 11 or H, and is --N═N--R 11 , if R 14 =--OH, --NH 2 , R 14 is --OH, --NH 2 , --N═N--R 11 , ##STR55## R 15 , R 16 are H, --OH, --OR 1 , --O--COR 1 , --NH 2 , --NH--R 1 , --NHR 1 R 2 , --NH--CO--R 1 , --SO 3 H, R 17 is H, --SO 3 H, in particular of the formulae ##STR56## in which R 18 denotes H, OH, NH 2 , --NH--CO--R 1 , --NH--R 1 , --N═N--R 11 , --SO 3 H, ##STR57## in which R 19 denotes H, --N═N--R 11 , R 20 , R 21 denote OH, NH 2 , --O--CO--R 1 , --NH--CO--R 1 , ##STR58## in which R is NH--R 1 , --NH--CO--R 1 , --N═N--R 11 .

Claim 6

Light-polarizing films or sheets according to claim 1 containing dyestuffs of the formula ##STR59## wherein Y 1 has the same structure as Y.

Claim 7

Films and sheets according to claims 1-5 containing dyestuffs of the formula ##STR60##