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LCP film for FPC industry and preparation method thereof

A film, CH2CH3 technology, applied in the field of polymer films, can solve the problems of difficult to play the active role of stabilizers, violent volatilization and even decomposition, etc., to achieve the effect of improving signal transmission speed, low moisture absorption rate, and wide source of raw materials

Active Publication Date: 2019-03-15
苏州市新广益电子股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the boiling point of diphenyl phosphite is only 218-219°C, and it is bound to be violently volatilized or even decomposed at a processing temperature of 390°C, which will cause diphenyl phosphite to leave the system quickly, so it is difficult to use it as a stabilizer positive role

Method used

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  • LCP film for FPC industry and preparation method thereof
  • LCP film for FPC industry and preparation method thereof
  • LCP film for FPC industry and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The preparation of embodiment 1 liquid crystal polymer

[0028] The synthesis of liquid crystal monomer shown in formula I:

[0029]

[0030] Dissolve 0.1mol of phloroglucinol and 0.32mol of p-hydroxybenzoic acid in 100mL of methanol, add a few drops of concentrated sulfuric acid dropwise, heat and react for 2 hours, filter with suction, wash the solid with ethanol, and obtain intermediate Ⅰ of the liquid crystal monomer shown in formula Ⅰ ;

[0031] Dissolve 0.1 mol of intermediate I of the liquid crystal monomer shown in formula I in 120 mL of ethanol, add dropwise 0.32 mol of 1,7-dibromoheptane, add 0.02 mol of KOH, heat to 60°C for 3 hours, filter with suction, and recrystallize from ethanol to obtain Intermediate II of the liquid crystal monomer shown in formula I;

[0032] Add 0.1mol intermediate II of the liquid crystal monomer shown in formula I, 0.3mol potassium acrylate, 2g tetrabutylammonium bromide, a small amount of hydroquinone and 160mL tetrahydrofur...

Embodiment 2

[0040] The preparation of embodiment 2 liquid crystal polymer

[0041] The preparation of liquid crystal polymer comprises the following steps: the liquid crystal monomer shown in 40g described formula I and 65g described formula II, 3g photoinitiator 2-dimethylamino-2-benzyl-1-[4-(4 -Morpholinyl)phenyl]-1-butanone and 1g of benzotriazole UV absorber are poured into the liquid crystal cell, at 95°C, at 2mW / cm 2 , induced polymerization under 365nm ultraviolet light, exposed for 30 minutes, and obtained liquid crystal polymer with a yield of 90%;

[0042] In the general structural formula of formula II, R 1 = H, R 2 = Cl, R 3 =H.

Embodiment 3

[0043] Preparation of Embodiment 3 Liquid Crystal Polymer

[0044] The preparation of liquid crystal polymer comprises the following steps: the liquid crystal monomer shown in 35g of said formula I and 62g of said formula II, 2g of photoinitiator 1-hydroxycyclohexyl phenyl ketone and 1g of salicylic acid ester ultraviolet absorbing The agent is poured into the liquid crystal cell, at 95°C, at 2mW / cm 2 , induced polymerization under 365nm ultraviolet light, exposed for 30min, and obtained liquid crystal polymer with a yield of 95%;

[0045] In the general structural formula of formula II, R 1 = H, R 2 =OCH 3 , R 3 =Br.

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Abstract

The invention provides an LCP film for FPC industry and a preparation method thereof. The film is prepared from liquid crystal monomers shown as a formula I and a formula II. The preparation method comprises the following steps: pouring the liquid crystal monomers shown as the formula I and the formula II, a photoinitiator and an ultraviolet absorbent into a liquid crystal box, and inducing polymerization and exposure under ultraviolet light with the intensity of 2 mW / cm<2> and the wavelength of 365 nm at 95 DEG C for 30 min to obtain a liquid crystal polymer; dissolving the liquid crystal polymer in an organic solvent, sequentially adding polycarbonate resin, temperature-resistant Teflon resin and epoxy resin, stirring and mixing uniformly, transferring an obtained reaction liquid to a twin-screw extruder for extrusion granulation, and finally preparing dried particles into the LCP film according to a casting technology. The LCP film has low dielectric constant at high frequency, hasincreased signal transmission speed, and can be widely applied to 5G network.

Description

technical field [0001] The invention relates to the technical field of polymer films, in particular to an LCP film. Background technique [0002] FPC is the abbreviation of Flexible Printed Circuit, also known as flexible printed circuit board. It is a printed circuit board made of flexible insulating substrate. It has many advantages that rigid printed circuit boards do not have. Its wiring density is high, Light weight, thin thickness, good bendability. The use of FPC can greatly reduce the volume of electronic products, which is in line with the development direction of electronic products to high density, miniaturization and high reliability. Therefore, FPC has been widely used in aerospace, military, mobile communications, laptop computers, computer peripherals, smart phones, digital cameras and other fields or products. FPC also has the advantages of good heat dissipation and solderability, easy assembly and low overall cost. With the increase in sales of smart elec...

Claims

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Application Information

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IPC IPC(8): C08J5/18C08F220/36C08F222/20C08L33/14C08L69/00C08L27/12C08L63/00
CPCC08F220/36C08J5/18C08J2333/14C08J2463/00C08J2469/00C08J2427/12C08F220/365C08F222/20
Inventor 夏超华
Owner 苏州市新广益电子股份有限公司
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