申请人:Clariant International Ltd.
公开号:US06436489B1
公开(公告)日:2002-08-20
Benzothiazoles of the formula (I) are used as components of liquid-crystal mixtures
where the symbols and indices preferably have the following meanings:
X1 and X2, independently of one another, are —CH—, —CF—, the —(R1)—C— group or the —(R1—A1—M1)C— group
Y1 and Y2, independently of one another, are hydrogen or fluorine, but are not simultaneously fluorine
with the provisos that:
x1) X2 is the —(R1)C— group or the —(R1—A1—M1)C— group, and X1 is —CF—, Y1 is F and Y2 is H, or
x2) X1 is the —(R1)C— group or the —(R1—A1—M1)C— group, and X2 is —CF—, Y2 is F and Y1 is H, or
x3) X2 is the —(R1)C— group or the —(R1—A1—M1)C— group, and X1 is —CH—, Y1 is H and Y2 is F, or
x4) X1 is the —(R1)C— group or the —(R1—A1—M1)C— group, and X2 is —CH—, Y2 is H and Y1 is F
R1 and R2, independently of one another, are a straight-chain or branched alkyl radical (with or without asymmetrical carbon atoms) having 1 to 20 carbon atoms, where
a) one non-terminal —CH2— group may be replaced by —O—, and/or
b) one or more H atoms may be replaced by F, and/or
A1 and A2, independently of one another, are phenylene-1,4-diyl,
M1 is undirected and is —OC(═O)—, —OC(═O)O—, —OCH2—, —(CH2)n—, —OC(═O)CH2CH2—, —OCH2CH2CH2—, —C≡C— or a single bond
n is from 1 to 6.
式(I)的苯并噻唑可用作液晶混合物的组分,其中符号和指数最好具有以下含义:X1和X2,独立地,是—CH—,—CF—,—(R1)—C—基团或—(R1—A1—M1)C—基团;Y1和Y2,独立地,是氢或氟,但不同时是氟,具有以下限制条件:x1)X2为—(R1)C—基团或—(R1—A1—M1)C—基团,X1为—CF—,Y1为F,Y2为H;或x2)X1为—(R1)C—基团或—(R1—A1—M1)C—基团,X2为—CF—,Y2为F,Y1为H;或x3)X2为—(R1)C—基团或—(R1—A1—M1)C—基团,X1为—CH—,Y1为H,Y2为F;或x4)X1为—(R1)C—基团或—(R1—A1—M1)C—基团,X2为—CH—,Y2为H,Y1为F;其中,R1和R2独立地是具有1到20个碳原子的直链或支链烷基(带或不带不对称碳原子),其中a)一个非端的—CH2—基团可以被—O—替换,或b)一个或多个H原子可以被F替换;A1和A2独立地是苯撑-1,4-二基苯基;M1是未定向的,是—OC(═O)—,—OC(═O)O—,—OCH2—,—(CH2)n—,—OC(═O)CH2CH2—,—OCH2CH2CH2—,—C≡C—或单键;n为1到6。