申请人:Ueno Fine Chemicals Industry, Ltd.
公开号:EP2264127A1
公开(公告)日:2010-12-22
The present invention provides a liquid-crystalline polyester blend composition comprising 100 parts by weight of a liquid-crystalline polyester blend and 0.1 - 300 parts by weight of calcium titanate and/or barium titanate:
wherein said liquid-crystalline polyester blend is obtainable by combining liquid-crystalline polyester (A) (LCP A) and liquid-crystalline polyester (B) (LCP B) such that the ratio by weight of (LCP A)/ (LCP B) is 99/1 to 80/20;
wherein,
LCP A consists of 100 molar parts of major repeating units and optionally 0.1 - 2 molar parts of one or two repeating units that come from corresponding minor copolymerizing components,
wherein the major repeating units are selected from the group consisting of aromatic oxycarbonyl repeating unit, aromatic dioxy repeating unit and aromatic dicarbonyl repeating unit, wherein 40 - 8C mol% of the major repeating units are the unit represented by formula (I); and the amounts of the aromatic dioxy repeating unit and the aromatic dicarbonyl repeating unit in the major repeating units are equimolar; and
LCP B is selected from the group consisting of liquid-crystalline polyester (b-1) (LCP b-1) and liquid-crystalline polyester (b-2) (LCP b-2), each consisting of 100 molar parts of major repeating units and optionally 0.1 - 2 molar parts of one or two repeating units that come from corresponding minor copolymerizing components;
wherein the major repeating units of LCP b-1 are aromatic oxycarbonyl repeating units; and
the major repeating units of LCP b-2 are selected from the group consisting of aromatic oxycarbonyl repeating unit, aromatic dioxy repeating unit and aromatic dicarbonyl repeating unit, wherein the amounts of aromatic dioxy repeating unit and aromatic dicarbonyl repeating unit in the major repeating units are equimolar,
wherein greater than or equal to 90 mol% of the major repeating units of LCP b-1 and LCP b-2 each are repeating units represented by formulae (I) and (II), and the molar proportion of the repeating units represented by formulae (I) to (II) is from 10/90 to 50/50;
provided that at least one of LCP A and LCP B comprises one or two repeating units that come from corresponding minor copolymerizing components selected from the group consisting of aromatic diol, aromatic dicarboxylic acid, aromatic monocarboxylic acid and aromatic monohydroxy compound
The liquid-crystalline polyester blend composition of the present invention exhibits excellent dielectric properties as well as good mechanical properties and thermal properties.
本发明提供了一种液晶聚酯混合物组合物,该组合物由 100 份(按重量计)的液晶聚酯混合物和 0.1 - 300 份(按重量计)的钛酸钙和/或钛酸钡组成:
其中,所述液晶聚酯混合物可通过将液晶聚酯(A)(LCP A)和液晶聚酯(B)(LCP B)混合,使(LCP A)/(LCP B)的重量比为 99/1 至 80/20;
其中
LCP A 由 100 摩尔份的主要重复单元和 0.1 - 2 摩尔份的一个或两个重复单 元组成,这些重复单元来自相应的次要共聚组分、
其中主要重复单元选自芳香族氧羰基重复单元、芳香族二氧羰基重复单元和芳香族二羰基重复单元组成的组,其中 40 - 8C 摩尔%的主要重复单元是式 (I) 所代表的单元;主要重复单元中芳香族二氧羰基重复单元和芳香族二羰基重复单元的量为等摩尔;以及
LCP B 选自液晶聚酯(b-1)(LCP b-1)和液晶聚酯(b-2)(LCP b-2)所组成的组,每种液晶聚酯(b-1)由 100 摩尔份的主要重复单元和 0.1-2 摩尔份的一个或两个重复单元组成,这些重复单元来自相应的次要共聚组分;
其中 LCP b-1 的主要重复单元是芳香氧羰基重复单元;以及
LCP b-2 的主要重复单元选自芳香族氧羰基重复单元、芳香族二氧重复单元和芳香族二羰基重复单元组成的组,其中芳香族二氧重复单元和芳香族二羰基重复单元在主要重复单元中的含量为等摩尔、
其中 LCP b-1 和 LCP b-2 的主要重复单元中大于或等于 90 摩尔%分别为式 (I) 和 (II) 所代表的重复单元,且式 (I) 至 (II) 所代表的重复单元的摩尔比例为 10/90 至 50/50;
条件是 LCP A 和 LCP B 中至少有一个包含一个或两个重复单元,这些重复单元来自选 自芳香族二元醇、芳香族二羧酸、芳香族单羧酸和芳香族单羟基化合物的相应次要共聚组 分
本发明的液晶聚酯共混物具有优异的介电性能、机械性能和热性能。