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Liquid crystal polymer composition and preparation method thereof

A technology of liquid crystal polymers and compositions, applied in the field of materials, can solve problems such as large lifting range and high dielectric loss

Pending Publication Date: 2022-05-17
KINGFA SCI & TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the polarity and high dielectric loss of carbon black itself, the dielectric loss of the liquid crystal polymer composition generally increases greatly after adding carbon black.

Method used

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  • Liquid crystal polymer composition and preparation method thereof
  • Liquid crystal polymer composition and preparation method thereof
  • Liquid crystal polymer composition and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Embodiment 1 Liquid crystal polymer resin 1

[0035] A liquid crystal polymer resin, comprising a structural unit shown in formula (I),

[0036]

[0037] In the liquid crystal polymer resin, the structural unit represented by formula (I) accounts for 20% by mole of all structural units.

[0038] The preparation method of the present embodiment liquid crystal polymer resin is as follows:

[0039]In a 100 liter reactor equipped with a nitrogen inlet and a stirrer with a stirring power display, add 61.2395 kg of p-hydroxybenzoic acid (HBA), 27.5200 kg of biphenol (BP), and 18.4146 kg of terephthalic acid (TPA) , 6.1382 kg isophthalic acid (IA) and 76.1938 kg acetic anhydride (AA) and 15.06 g magnesium acetate. After replacing the nitrogen, raise the reaction temperature to 145°C under a nitrogen atmosphere and reflux for 3 hours; then raise the temperature to 360°C at a rate of 60°C / hour, keep the reaction at this temperature for 30 minutes, and then evacuate to withi...

Embodiment 2

[0041] Embodiment 2 liquid crystal polymer resin 2

[0042] A liquid crystal polymer resin, comprising a structural unit shown in formula (I),

[0043]

[0044] In the liquid crystal polymer resin, the structural unit represented by formula (I) accounts for 25% by mole of all structural units.

[0045] The preparation method of the present embodiment liquid crystal polymer resin is as follows:

[0046] In a 100-liter reactor equipped with a nitrogen inlet and a stirrer with a stirring power display, add 1.6869 kg of p-hydroxybenzoic acid (HBA), 60.9038 kg of 2-hydroxy-6-naphthoic acid (HNA), 25.5844 kg of biphenyl diphenyl Phenol (BP), 22.8259 kg terephthalic acid (TPA) and 62.9641 kg acetic anhydride (AA) and 15.06 g magnesium acetate. After replacing the nitrogen, raise the reaction temperature to 145°C under a nitrogen atmosphere and reflux for 3 hours; then raise the temperature to 358°C (the highest pre-polymerization reaction temperature) at a rate of 60°C / hour, and...

Embodiment 3

[0048] Embodiment 3 liquid crystal polymer resin 3

[0049] A liquid crystal polymer resin, comprising a structural unit shown in formula (I),

[0050]

[0051] In the liquid crystal polymer resin, the structural unit represented by formula (I) accounts for 11.2% by mole of all structural units.

[0052] The preparation method of the present embodiment liquid crystal polymer resin is as follows:

[0053] In a 100-liter reactor equipped with a nitrogen inlet and a stirrer with a stirring power display, add 65.9614 kg of p-hydroxybenzoic acid (HBA), 7.1779 kg of 2-hydroxy-6-naphthoic acid (HNA), 15.9100 kg of biphenyl diphenyl Phenol (BP), 20.5315 kg terephthalic acid (TPA), 5.7658 kg para-acetaminophen (APAP) and 75.8369 kg acetic anhydride (AA) and 15.06 g magnesium acetate. After replacing the nitrogen, raise the reaction temperature to 145°C under a nitrogen atmosphere and reflux for 3 hours; then raise the temperature to 350°C at a rate of 60°C / hour, keep the reaction ...

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Abstract

The invention relates to a liquid crystal polymer composition which comprises the following components in parts by weight: 48-69.9 parts of liquid crystal polymer resin, 30-50 parts of filler and 0.3-2 parts of carbon black, and the pH value of the carbon black is less than or equal to 3. The carbon black with the pH value smaller than or equal to 3 is added into the liquid crystal polymer resin composition, and the prepared liquid crystal polymer resin composition is black in color and low in dielectric loss.

Description

technical field [0001] The invention relates to a liquid crystal polymer composition and a preparation method thereof, in particular to a thermotropic liquid crystal polymer composition containing carbon black for applications requiring low dielectric loss and a preparation method thereof, and belongs to the field of material technology. Background technique [0002] The thermotropic liquid crystal polymer composition is colored black by adding carbon black, injected into various moldings, and used in the fields of electronic and electrical connectors and the like. In order to make the liquid crystal resin composition black while not affecting its performance, CN1165580 discloses a liquid crystal polymer composition containing 0.1-10wt% carbon black, the flame retardancy of the composition reaches V-0 level; and JPH07196894 reports a liquid crystalline resin composition in which carbon black with a pH of 3.5-10 is added to a liquid crystalline polymer resin. JPH10101945A di...

Claims

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Application Information

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IPC IPC(8): C08L67/00C08K7/14C08K3/04C08K3/34C08K13/04
CPCC08K7/14C08K3/04C08K3/34C08K13/04C08L67/00C08L67/04C08L67/02Y02P20/10
Inventor 肖中鹏黄险波姜苏俊徐显骏
Owner KINGFA SCI & TECH CO LTD
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