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Low-dielectric-constant liquid crystal polymer and preparation method thereof

A technology of liquid crystal polymer and low dielectric constant, which is applied in the field of low dielectric constant liquid crystal polymer and its preparation, can solve the problems of affecting signal propagation speed and large dielectric constant, and achieve less equipment and low dielectric constant performance and production cost reduction

Pending Publication Date: 2020-05-12
江苏沃特特种材料制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a low dielectric constant liquid crystal polymer and its preparation method, aiming to solve the problem in the prior art that the dielectric constant of the liquid crystal polyester resin is relatively large and thus affects the signal propagation speed

Method used

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  • Low-dielectric-constant liquid crystal polymer and preparation method thereof

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preparation example Construction

[0056] Preferably, the preparation method of the wholly aromatic liquid crystal polyester resin comprises the steps of:

[0057] S011. Provide at least 2 kinds of monomer substances, and perform polycondensation reaction to prepare a wholly aromatic liquid crystal polyester prepolymer;

[0058] S012. Performing a solid-state polycondensation reaction on the wholly aromatic liquid crystal polyester prepolymer to prepare the wholly aromatic liquid crystal polyester resin.

[0059] In the above step S011, the monomer substance is selected from at least two kinds of free aromatic diol, aromatic diamine, aromatic hydroxylamine, aromatic dicarboxylic acid, aromatic hydroxycarboxylic acid and aromatic aminocarboxylic acid. Since the whole aromatic liquid crystal polyester resin is composed of the monomers, the prepared whole aromatic liquid crystal polyester resin has better performance, so that the low dielectric constant liquid crystal polymer has more excellent resistance Thermal...

Embodiment 1

[0075] A low dielectric constant liquid crystal polymer

[0076] The low dielectric constant liquid crystal polymer includes, for example, 75 parts of wholly aromatic liquid crystal polyester resin; 25 parts of hollow glass microspheres; wherein, the diameter of the hollow glass microspheres is 20 μm, and the type is 3M iM16K.

[0077] The preparation method of the low dielectric constant liquid crystal polymer, the preparation method includes the following steps: weighing each component according to the low dielectric constant liquid crystal polymer; The hollow glass microspheres were dried at 130° C. for 4 hours; the dried fully aromatic liquid crystal polyester resin and the hollow glass microspheres were put into an automatic mixer and mixed uniformly to obtain a first mixture; The first mixture is put into a twin-screw extruder for melting and kneading, and then extruded, drawn, cooled and granulated to produce the low dielectric constant liquid crystal polymer.

Embodiment 2

[0079] A low dielectric constant liquid crystal polymer

[0080] The low dielectric constant liquid crystal polymer includes, for example, 85 parts of wholly aromatic liquid crystal polyester resin; 15 parts of hollow glass microspheres; wherein, the diameter of the hollow glass microspheres is 20 μm, and the type is 3M iM16K.

[0081] The preparation method of the low dielectric constant liquid crystal polymer, the preparation method includes the following steps: weighing each component according to the low dielectric constant liquid crystal polymer; The hollow glass microspheres were dried at 130° C. for 4 hours; the dried fully aromatic liquid crystal polyester resin and the hollow glass microspheres were put into an automatic mixer and mixed uniformly to obtain a first mixture; The first mixture is put into a twin-screw extruder for melting and kneading, and then extruded, drawn, cooled and granulated to produce the low dielectric constant liquid crystal polymer.

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Abstract

The invention provides a low-dielectric-constant liquid crystal polymer. The low-dielectric-constant liquid crystal polymer comprises, by weight, 50-90 parts of wholly aromatic liquid crystal polyester resin and 10-30 parts of hollow glass beads, wherein the diameter of the hollow glass beads is 10-50 [mu]m. The low-dielectric-constant liquid crystal polymer takes the wholly aromatic liquid crystal polyester resin as a parent material, the hollow glass beads with the diameter of 10-50 [mu]m are added, the wholly aromatic liquid crystal polyester resin is modified with the hollow glass beads, the hollow glass beads are of hollow structures and have hard shells, the interiors of the shells are rarefied gas, and the hollow glass beads with the hollow structures are added, so that the hollow glass beads are mixed with the wholly aromatic liquid crystal polyester resin, and the overall dielectric constant of the prepared liquid crystal polymer is reduced.

Description

technical field [0001] The invention relates to the field of polymer composite materials, in particular to a liquid crystal polymer with low dielectric constant and a preparation method thereof. Background technique [0002] Liquid crystal polymer (LCP) is an intermediate state polymer between solid crystal and liquid. Although its molecular arrangement is not as three-dimensionally ordered as solid crystal, it is not as disordered as liquid. Rather, it has a certain (one-dimensional or two-dimensional) orderliness. It is a new type of polymer material, which generally exhibits liquid crystallinity in the molten state. These materials have excellent heat resistance and formability. [0003] Liquid crystal polymers can be further divided into lyotropic liquid crystal polymers and thermotropic liquid crystal polymers. The former is in a liquid crystal state in a solvent, and the latter is in a liquid crystal state due to temperature changes. Thermotropic liquid crystal pol...

Claims

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Application Information

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IPC IPC(8): C08L67/03C08L67/04C08K7/28C08K7/14
CPCC08K7/14C08K7/28C08L67/03C08L67/04
Inventor 金东植刘彬孟华周小宇
Owner 江苏沃特特种材料制造有限公司
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