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Liquid crystal polymer film for flexible copper-clad plate applied to 5G communication and preparation method of liquid crystal polymer film

A technology of liquid crystal polymers and flexible copper clad laminates, which is applied in the direction of liquid crystal materials, chemical instruments and methods, etc., can solve the problems of poor mechanical properties of products, difficult control of molding processing technology, etc., and achieve the effect of improving the binding force

Active Publication Date: 2021-11-23
宁波聚嘉新材料科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing patent technologies such as CN111690326A, CN112080291A, etc. all improve the peel strength of LCP film and copper foil by changing the preparation process, but there are disadvantages such as difficult control of the molding process, poor mechanical properties of the product, and easy fibrillation.

Method used

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  • Liquid crystal polymer film for flexible copper-clad plate applied to 5G communication and preparation method of liquid crystal polymer film
  • Liquid crystal polymer film for flexible copper-clad plate applied to 5G communication and preparation method of liquid crystal polymer film
  • Liquid crystal polymer film for flexible copper-clad plate applied to 5G communication and preparation method of liquid crystal polymer film

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0047] The preparation method of the above-mentioned liquid crystal polymer film for 5G communication flexible copper clad laminate comprises the following steps:

[0048] S1: The monomer p-hydroxybenzoic acid, 6-hydroxy-2-naphthoic acid, biphenol, biphenyl dicarboxylic acid, octafluoro-4,4′-biphenol, acetylating reagent acetic anhydride, catalyst 4-di Aminopyridine and antioxidant tin powder are thrown into a Hastelloy polymerization kettle for prepolymerization to obtain a prepolymer;

[0049] S2: The prepolymer is discharged from the Hastelloy kettle, crushed, and solid-state polycondensed in a nitrogen atmosphere to obtain a liquid crystal polymer;

[0050] S3: Extrude and cast the prepared liquid crystal polymer through a screw extruder, exhaust, melt and plasticize it through a T-die to a cooling roll to obtain a primary liquid crystal polymer film;

[0051] S4: laminating, stretching, and winding the nascent liquid crystal polymer film to obtain a finished liquid cryst...

Embodiment 1

[0063] According to the ratio of 1# monomers, p-hydroxybenzoic acid, 6-hydroxy-2-naphthoic acid, biphenyldiphenol, biphenyldicarboxylic acid, octafluoro-4,4′-biphenol, 4-p-hydroxybenzoic acid, 6 -Hydroxy-2-naphthoic acid, biphenol, acetic anhydride with 1.2 times the total molar number of hydroxyl groups in octafluoro-4,4'-biphenol, 4-dimethylaminopyridine accounting for 100ppm of the total weight of the five monomers, Put tin powder accounting for 0.2% of the total weight of the five monomers into the Hastelloy polymerizer and keep it at 130°C for 2h; raise the temperature to 310°C at a rate of 0.4°C / min and keep it warm for 1h; pour 0.2MPa nitrogen into the polymerizer , the prepolymer is discharged through an 8-hole discharge valve with a diameter of 2mm, crushed, passed through a 20-mesh sieve, and dried at 120°C for 1 hour to obtain a prepolymer;

[0064] The prepared prepolymer was subjected to solid-state polycondensation in a rotary kiln at 195°C for 12 hours under the...

Embodiment 2

[0069] The difference from Example 1 is that p-hydroxybenzoic acid, 6-hydroxy-2-naphthoic acid, biphenyldiphenol, biphenyldicarboxylic acid, octafluoro-4,4'-biphenol , Acetic anhydride accounting for 1.4 times the total molar number of hydroxyl groups in p-hydroxybenzoic acid, 6-hydroxy-2-naphthoic acid, biphenol, and octafluoro-4,4'-biphenol, accounting for 130ppm of the total weight of the five monomers The 4-dimethylaminopyridine and tin powder accounting for 0.22% of the total weight of the five monomers were put into the Hastelloy polymerization kettle and kept at 135°C for 3h; the temperature was raised to 315°C at a rate of 0.5°C / min and kept for 2h; Pour 0.3MPa nitrogen into the polymerization kettle, release the prepolymer through an 8-hole discharge valve with a diameter of 2mm, crush it, pass through a 20-mesh sieve, and dry it at 125°C for 2 hours to obtain a prepolymer; Under the protection of nitrogen, solid-state polycondensation was carried out in a rotary kiln...

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Abstract

The invention belongs to the technical field of high-molecular polymers, and particularly relates to a liquid crystal polymer film for a flexible copper-clad plate applied to 5G communication and a preparation method of the liquid crystal polymer film. The liquid crystal polymer film provided by the invention comprises a liquid crystal polymer, and the liquid crystal polymer is prepared from the following monomers: p-hydroxybenzoic acid, 6-hydroxy-2-naphthoic acid, biphenol, biphenyl dicarboxylic acid and octafluoro-4,4'-diphenol. The preparation method comprises the steps of prepolymerization, solid phase polycondensation, mixing, melt extrusion, lamination, stretching and winding. According to the invention, binding force between metal copper foil and the liquid crystal polymer film prepared by introducing the novel monomer octafluoro-4,4'-diphenol, the p-hydroxybenzoic acid, the 6-hydroxy-2-naphthoic acid, the biphenol and the biphenyl dicarboxylic acid through copolymerization is substantially improved, peel strength can achieve 1.9 KN / m or more, and the use requirement of the FPC on the high-quality flexible copper-clad plate applied to 5G communication can be met.

Description

technical field [0001] The invention belongs to the technical field of polymer polymerization, and in particular relates to a liquid crystal polymer film used for 5G communication flexible copper-clad laminates and a preparation method thereof. Background technique [0002] Flexible printed circuit boards (FPC) have been extended from military, aerospace and other fields to consumer electronics and integrated circuits for people's livelihood, such as mobile phones, computers, automotive sensors, medical devices, etc., and consumer demand is increasing The bigger it is, the flexible copper clad laminate (FCCL), which is the key upstream material of FPC, will show a good development trend. [0003] FCCL is mainly composed of conductive materials (such as copper foil) and insulating base film materials. As the insulating base film material of FCCL, it needs to have good electrical properties, mechanical properties, heat resistance, moisture absorption properties and dimensional...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/00C08G63/682C08G63/80C08G63/87C08J5/18C09K19/38
CPCC08J5/18C08G63/682C08G63/80C08G63/87C09K19/3809C08J2367/00Y02A30/00
Inventor 王阳任忠平周建英
Owner 宁波聚嘉新材料科技有限公司
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