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Main chain benzoxazine copolymer oligomer containing polystyrene, copolymer resin and preparation method thereof

A technology of benzoxazine copolymer resin and polystyrene, which is applied in the field of organic polymer materials, can solve the problems that cannot meet the requirements well, and achieve the effect of improving dielectric properties, improving thermal stability, and simple preparation process

Active Publication Date: 2021-03-02
淮北绿洲新材料有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the dielectric constant k of traditional benzoxazine resins is generally 3.5, and f is generally 0.02 (1GHz), which cannot well meet the requirements of the electronic information industry for substrate resins

Method used

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  • Main chain benzoxazine copolymer oligomer containing polystyrene, copolymer resin and preparation method thereof
  • Main chain benzoxazine copolymer oligomer containing polystyrene, copolymer resin and preparation method thereof
  • Main chain benzoxazine copolymer oligomer containing polystyrene, copolymer resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Add 0.05mol 4,4'-diaminodiphenylmethane and 0.2mol paraformaldehyde into a three-necked flask equipped with a condenser, magnetic stirring, and a thermometer, and add 60mL of toluene / N,N'-dimethylformamide mixed solvent (Volume ratio is 1:1), heated to 105°C and stirred for 60 minutes, then introduced nitrogen gas, added 0.025mol resorcinol, stirred for another 60 minutes, added 0.025mol p-cresol and 0.025mol poly-p-vinylphenol, aldehyde group , The molar ratio of phenolic hydroxyl group and amino functional group is 2:1:1, and then continue to react for 72h. After the reaction, pour the reaction solution into 100mL methanol solution (concentration 85wt%) and let it stand for 24h to obtain a precipitate. Vacuum drying for 6 hours, and finally grinding the dried product to obtain a powder which is the main chain benzoxazine copolymer oligomer.

[0032] The molecular structural formulas of 4,4'-diaminodiphenylmethane, resorcinol and p-cresol used in this example are respe...

Embodiment 2

[0039] Add 0.05mol 4,4'-diaminodiphenylmethane and 0.2mol paraformaldehyde into a three-necked flask equipped with a condenser, magnetic stirring, and thermometer, and add 60mL of xylene / methanol mixed solvent (volume ratio 3:1) . After heating to 120°C and stirring for 60 minutes, nitrogen gas was introduced, 0.025mol of 4,4'-dihydroxybiphenyl was added, and after stirring for 100 minutes, 0.025mol of phenol and 0.025mol of poly-p-vinylphenol were added, and the molar ratio of aldehyde groups, phenolic hydroxyl groups and amino functional groups 2:1:1, and then continue to react for 36 hours. After the reaction, pour the reaction solution into 100mL methanol solution (concentration 95wt%) and let it stand for 24 hours to obtain a precipitate. Vacuum dry the precipitate at 60°C for 6 hours, and finally dry it The powder obtained by grinding the product is the main chain benzoxazine copolymer oligomer.

[0040] The molecular structural formulas of 4,4'-diaminodiphenylmethane, ...

Embodiment 3

[0047] Add 0.05mol 1,6-hexamethylenediamine and 0.2mol paraformaldehyde into a 250mL three-neck flask equipped with a condenser, magnetic stirring, and a thermometer, add 60mL of toluene / ethanol mixed solvent (volume ratio: 1:5), and heat Stir at 80°C for 60min. After feeding nitrogen, add 0.025mol bisphenol A, stir for another 120min, add 0.025mol phenol, 0.025mol poly-p-vinylphenol, the molar ratio of aldehyde group, phenolic hydroxyl group and amino functional group is 2:1:1, and then continue to react for 100h After the reaction, pour the reaction liquid into 100mL methanol solution (concentration 60wt%), let it stand for 24 hours to obtain a precipitate, dry the precipitate in vacuum at 50°C for 24 hours, and finally grind the dried product to obtain a powder that is polystyrene End-capped backbone benzoxazine copolymer oligomer.

[0048] The molecular structural formulas of 1,6-hexamethylenediamine, bisphenol A and phenol used in this embodiment are respectively:

[00...

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Abstract

The invention relates to a main chain benzoxazine copolymer oligomer containing polystyrene, a copolymer resin and a preparation method thereof. The general formula of a main chain benzoxazine copolymer oligomer containing polystyrene is as described in claim 1. The copolymer oligomer of the present invention has both thermosetting and thermoplastic properties, good processing performance, and the copolymer resin obtained by curing at elevated temperature not only retains the advantages of high crosslinking density, high thermal stability and good toughness of pure main chain benzoxazine resin, It also forms a semi-interpenetrating cross-linked network structure with polystyrene, which further improves the thermal stability and toughness of the resin. In particular, the introduction of low-polar polystyrene makes the copolymer resin have excellent dielectric properties - low dielectric constant and ultra-low dielectric loss at high frequencies, which can be used for high-frequency and high-speed circuit board substrates, microwave and Millimeter wave communication, automotive radar, and other fields of composite materials.

Description

technical field [0001] The invention relates to the technical field of organic polymer materials, in particular to a main chain benzoxazine copolymer oligomer containing polystyrene, a copolymer resin and a preparation method thereof. Background technique [0002] Entering the 21st century, information transmission has entered the era of high-frequency signal transmission. In order to increase the speed of signal transmission, the high frequency of electronic information products puts forward higher requirements for the copper clad laminate (CCL) as the carrier of information transmission and the polymer resin of its important components. The matrix resin needs its dielectric strength at high frequencies. Performance combines low dielectric constant and ultra-low dielectric loss. [0003] Benzoxazines are intermediates of a class of oxygen-nitrogen-containing heterocyclic structures synthesized from phenols, amine compounds and paraformaldehyde. They are ring-opened and pol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G14/06
CPCC08G14/06
Inventor 曾鸣陈江炳
Owner 淮北绿洲新材料有限责任公司
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