申请人:Montedison S.p.A.
公开号:EP0323710A1
公开(公告)日:1989-07-12
Thermotropic liquid crystalline aromatic polyesters comprise:
(a) units derived from one or more dicarboxylic aromatic acids of the formula:
HOOC-Ar₁-O-Ar₂-COOH (1)
in which:
Ar₁ is a divalent aromatic radical consisting of one ring, or of a plurality of condensed, partially codensed or non condensed rings, containing from 6 to 18 carbon atoms, and which may be substituted
Ar₂ is a divalent aromatic radical consisting of a plurality of condensed, partially condensed or non-condensed rings, containing from 12 to 18
(b) units derived from one or more aromatic diols of the formula:
HO-Ar₃-OH (2)
in which
Ar₃ is a divalent aromatic radical consisting of one ring, or of a plurality of condensed, partially condensed or non-condensed rings, containing from 6 to 18 carbon atoms, and which may be substituted
and if desired, units derived from one or more other aromatic diacids and/or hydroxy acids of the formulae:
(c) HOOC-Ar₃-COOH (3)
(in which Ar₃ is as defined above), and
(d) HO-Ar₃-(CH=CH)n-COOH (4)
(in which Ar₃ is as defined above and n is 0 or 1).
热致液晶芳香族聚酯包括:
(a) 由一个或多个公式为:HOOC-Ar₁-O-Ar₂-COOH(1)的二元芳香族酸衍生的单元,其中:
Ar₁是一个二价的芳香基团,包含一个环或多个凝聚的、部分凝聚的或非凝聚的环,含有6到18个碳原子,并且可以被取代;
Ar₂是一个二价的芳香基团,包含多个凝聚的、部分凝聚的或非凝聚的环,含有12到18个碳原子。
(b) 由一个或多个公式为:HO-Ar₃-OH(2)的芳香族二元醇衍生的单元,其中
Ar₃是一个二价的芳香基团,包含一个环或多个凝聚的、部分凝聚的或非凝聚的环,含有6到18个碳原子,并且可以被取代。
如果需要,还可以包括由一个或多个其他芳香族二元酸和/或羟基酸的公式衍生的单元:
(c) HOOC-Ar₃-COOH(3)(其中Ar₃如上所定义)和
(d) HO-Ar₃-(CH=CH)n-COOH(4)(其中Ar₃如上所定义,n为0或1)。