申请人:HIMONT ITALIA S.r.l.
公开号:EP0321107A1
公开(公告)日:1989-06-21
A thermotropic liquid-crystalline aromatic polyester comprises:
a) units derived from one or more essentially monosubstituted phenols of the formula:
in which X is a halogen atom; an alkyl group; an aralkyl group containing at least 7 carbon atoms; a cycloalkyl, mono-aryl, di-aryl or condensed aryl group or a keto group -COR or an ether group -OR (in which R is an alkyl or aryl group which may be substituted with inert substituents);
b) units derived from one or more dicarboxylic acids of the formula:
HOOC - R₁ - COOH (2)
in which R₁ is a cycloalkyl, monoaryl, diaryl or condensed aryl group which may be substituted with inert substituent groups;
c) optionally, units derived from one or more hydroxyacids of the formula:
HO-Ar₁-(CH=CH)n-COOH (3)
in which Ar₁ is a monoaryl, diaryl or condensed aryl group which may be substituted with inert substituents; and n is 0 or 1; and
d) optionally, units derived from one or more diphenols of the formula:
HO - Ar₂ - OH (4)
in which Ar₂ is a monoaryl or condensed aryl group which may be substituted with at least one group X (as defined above), or an unsubstituted diaryl group.
一种热致性液晶芳香族聚酯包括
a) 由一个或多个基本上为单取代的苯酚衍生的单元,其式如下
其中 X 是卤素原子;烷基;至少含有 7 个碳原子的芳烷基;环烷基、单芳基、二芳基或缩合芳基或酮基 -COR 或醚基 -OR(其中 R 是可被惰性取代基取代的烷基或芳基);
b) 由一个或多个式中的二羧酸衍生的单元:
hooc - r₁ - cooh (2)
其中 R₁ 是环烷基、单芳基、双芳基或缩合芳基,可被惰性取代基取代;
c) 可选地,由一个或多个式中的羟基酸衍生的单元:
HO-Ar₁-(CH=CH)n-COOH (3)
其中 Ar₁ 是可被惰性取代基取代的单芳基、双芳基或缩合芳基;n 是 0 或 1;以及
d) 可选地,由一个或多个式中的二酚衍生的单元:
HO - Ar₂ - OH (4)
其中 Ar₂ 是可被至少一个基团 X(如上定义)取代的单芳基或缩合芳基,或未取代的二芳基。