Liquid-crystalline polymers containing chromophoric side groups

Claim 2

A cholesterically liquid-crystalline organopolysiloxane which contains, in the side groups, both non-chromophoric mesogens, at least some of which are optically active, and chromophoric groups.

Claim 3

The organopolysiloxane of claim 1 which contains azo or azoxy groups as the chromophoric groups.

Claim 4

The organopolysiloxane of claim 2, which is built up from units of the formula R.sub.a R'.sub.b R".sub.c SiO.sub.(4-a-b-c)/2, (I) where R represents monovalent radicals of the formula ##STR4## in which n represents an integer having a value of from 2 to 12, m represents an integer having a value of 0 or 1, and Y represents radicals selected from the group consisting of (i) phenyl radicals which are substituted in the para-position by groups selected from the group consisting of halogen, cyano, C 1 - to C 8 -alkoxy, phenyl, phenoxy and cyclohexyl radicals and (ii) radicals selected from the group consisting of cholesteryl, 4-cyclohexyl-cyclohexyl and pinan-10-yl radicals; R' represents monovalent radicals of the formula --(CH.sub.2).sub.n (O)m--Z (III) in which n and m are the same as above and Z is a radical selected from the formula consisting of ##STR5## R" represents radicals selected from the group consisting of C 1 - to C 8 -alkyl radicals and the phenyl radical, which may optionally be substituted by halogen atoms, and a, b and c each represent integers having a value of from 0 to 3, with the proviso that the sum of a, b and c is a maximum of 3, and on the average, each organopolysiloxane molecule contains at least one unit of formula (I) in which a has a value of at least 1 and one unit in which b has a value of at least 1.

Claim 5

The organopolysiloxane of claim 3, which is built up of units of formulas R.sub.a R".sub.c SiO.sub. (4-a-b-c)/2, (VIII) R'.sub.b R".sub.c SiO.sub. (4-a-b-c)/2, (IX) and optionally R".sub.c SiO.sub.4-c/2 (X) in which R represents monovalent radicals of the formula ##STR6## in which n represents an integer having a value of from 2 to 12, m represents an integer having a value of 0 or 1, and Y represents radicals selected from the group consisting of (i) phenyl radicals which are substituted in the para-position by groups selected from the group consisting of halogen, cyano, C 1 - to C 8 -alkoxy, phenyl, phenoxy and cyclohexyl radicals and (ii) radicals selected from the group consisting of cholesteryl, 4-cyclohexyl-cyclohexyl and pinan-10-yl radicals; R' represents monovalent radicals of the formula --(CH.sub.2).sub.n (O)m--Z (III) in which n and m are the same as above and Z is a radical selected from the formula consisting of ##STR7## R" represents selected from the group consisting of C 1 - to C 8 -alkyl radicals and the phenyl radical, which may optionally be substituted by halogen atoms, and a, b and c each represent integers having a value of from 0 to 3, with the proviso that the sum of a, b and c is a maximum ob 3, and on the average, each organopolysiloxane molecule contains at least one unit of formula (I) in which a has a value of at least 1 and one unit in which b has a value of at least 1.

Claim 6

The organopolysiloxane of claim 3 in which R" is selected from the group consisting of methyl, ethyl and phenyl radicals, and the sum of a+b+c in each case has an average value of from 1.8 to 2.2.

Claim 7

The organopolysiloxane of claim 4, in which R" is selected from the group consisting of methyl, ethyl and phenyl radicals, and the sum of a+b+c in each case has an average value of from 1.8 to 2.2.

Claim 8

The organopolysiloxane of claim 1, which has a weight average molecular weight of at least 1,200.

Claim 9

The organopolysiloxane of claim 2, which has a weight average molecular weight of at least 1,200.

Claim 10

The organopolysiloxane of claim 3, which has a weight average molecular weight of at least 1,200.

Claim 11

The organopolysiloxane of claim 4, which has a weight average molecular weight of at least 1,200.

Claim 12

The organopolysiloxane of claim 5, which has a weight average molecular weight of at least 1,200.

Claim 13

The organopolysiloxane of claim 6, which has a weight average molecular weight of at least 1,200.

Claim 14

A process for preparing the organopolysiloxane of claim 1 in which an organopolysiloxane of the formula R".sub.c H.sub.(a+b) SiO(.sub.(4-a-b-c)/2 (XI) is reacted with a compound of the formula ##STR8## and a compound of the formula H.sub.2 C═CH--(CH.sub.2)(.sub.(n-2) (O).sub.m --Z (XIII) in which R" represents radicals selected from the group consisting of C 1 - to C 8 -alkyl radicals and a phenyl radical, which may optionally be substituted by halogen atoms, Y represents radicals selected from the group consisting of phenyl radicals which are substituted in the para-position by groups selected from halogen, cyano, C 1 - to C 8 -alkoxy, phenyl, phenoxy or cyclohexyl radicals and radicals selected from the group consisting of cholesteryl, 4-cyclohexyl-cyclohexyl and pinan-10-yl radicals; Z is a radical selected from the formulas consisting of ##STR9## a, b and c each represent integers having a value of from 0 to 3, with the proviso that the sum of a+b+c is a maximum of 3, and on the average, a and b have a value of at least 1; n represents an integer having a value of from 2 to 12; m represents an integer having a value of 0 or 1, in the presence of a platinum metal and/or a compound thereof.

Claim 15

An information storage device containing the organopolysiloxane of claim 1.

Claim 16

An information storage device containing the organopolysiloxane of claim 2.

Claim 17

An information storage device containing the organopolysiloxane of claim 3.

Claim 18

An information storage device containing the organopolysiloxane of claim 4.

Claim 19

An information storage device containing the organopolysiloxane of claim 5.

Claim 20

An information storage device containing the organopolysiloxane of claim 6.

Claim 21

An information storage device containing the organopolysiloxane of claim 7.

Claim 22

An information storage device containing the organopolysiloxane of claim 8.

Claim 23

An information storage device containing the organopolysiloxane of claim 9.

Claim 24

An information storage device containing the organopolysiloxane of claim 10.

Claim 25

An information storage device containing the organopolysiloxane of claim 11.

Claim 26

An information storage device containing the organopolysiloxane of claim 12.

Claim 27

An information storage device containing the organopolysiloxane produced by the process of claim 13.