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A temperature-resistant and flame-retardant poss modified diphthalonitrile and cyanate ester blended resin system

A technology of diphthalonitrile and cyanate ester, which is applied in the field of POSS modified diphthalonitrile and cyanate ester blended resin system, and can solve the problems of poor processability of diphthalonitrile polymers, etc. , to achieve the effect of improving manufacturability, good temperature resistance and good temperature resistance

Active Publication Date: 2021-07-13
HARBIN FRP INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of poor manufacturability of existing bisphthalonitrile polymers, and to provide a temperature-resistant and flame-retardant POSS modified bisphthalonitrile and cyanate blend resin system

Method used

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  • A temperature-resistant and flame-retardant poss modified diphthalonitrile and cyanate ester blended resin system
  • A temperature-resistant and flame-retardant poss modified diphthalonitrile and cyanate ester blended resin system
  • A temperature-resistant and flame-retardant poss modified diphthalonitrile and cyanate ester blended resin system

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specific Embodiment approach 1

[0012] Specific implementation mode 1: In this embodiment, a temperature-resistant and flame-retardant POSS-modified bis-phthalonitrile and cyanate blend resin system is a combination of POSS-modified bis-phthalonitrile prepolymer and flame-retardant After the cyanate ester is evenly mixed, it is obtained by heating and dissolving; wherein the mass percentage of the POSS-modified bis-phthalonitrile prepolymer in the POSS-modified bis-phthalonitrile and cyanate ester blended resin system is 10-50%.

[0013] The beneficial effect of this implementation mode:

[0014] Bisphthalonitrile prepolymer has good compatibility with cyanate ester. The blending of the two resins greatly improves its manufacturability. It becomes a viscous liquid at room temperature. The viscosity can be adjusted according to the ratio. It is suitable for various molding processes of composite materials. The temperature resistance of the blended resin is very good, and the glass transition temperature can...

specific Embodiment approach 2

[0016] Specific embodiment two: the difference between this embodiment and specific embodiment one is that the preparation method of the POSS-modified bisphthalonitrile prepolymer is: the silsesquioxane with cage or semi-cage structure containing hydroxyl Mix alkanes and 4-nitrophthalyl groups in equimolar proportions according to the amount of hydroxyl and nitro groups, add polar solvent and anhydrous potassium carbonate, fully react and stir at room temperature for 20-28 hours to obtain a mixture; pour the mixture into In deionized water, filter under reduced pressure to obtain precipitates, wash the precipitates, and obtain diphthalonitrile monomers containing cage or semi-cage silsesquioxane POSS structures after recrystallization; Melt, add amine curing agent, mix evenly, and stir for 25-40min to obtain bis-phthalonitrile prepolymer containing silsesquioxane POSS structure; silsesquioxane with cage or semi-cage structure containing hydroxyl The molar ratio of oxane to anh...

specific Embodiment approach 3

[0017] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the preparation method of the POSS modified bis-phthalonitrile prepolymer is: the bis-phthalonitrile monomer is mixed at 200-260 After melting at ℃, add an amine curing agent, mix well, and stir for 25-40 minutes to form a prepolymer; add a cage or semi-cage structure with any reactive functional group to the prepolymer Silsesquioxane and silsesquioxane are completely dissolved in the prepolymer, then stirred for 10-15min, and then cooled to room temperature to obtain a bisphthalonitrile prepolymer containing silsesquioxane POSS structure; The mass percent content of amine curing agent in bis-phthalonitrile prepolymer of semisiloxane POSS structure is 1-3%, and the silsesquisil with any kind of reactive functional group is cage or semi-cage structure The percentage content of oxane is 0.5-10%. It is the same as the specific embodiment 1 or 2.

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Abstract

A temperature-resistant and flame-retardant POSS modified diphthalonitrile and cyanate ester blended resin system, the invention relates to a temperature-resistant and flame-retardant POSS modified bisphthalonitrile and cyanate ester blend Resin system, the purpose of the present invention is in order to solve the problem that existing bis-phthalonitrile polymer manufacturability is poor, the POSS modified bis-phthalonitrile and cyanate ester blending resin system of the present invention is POSS modified Diphthalonitrile prepolymer and flame retardant cyanate ester are uniformly mixed and then heated and dissolved; among them, POSS modified diphthalonitrile and cyanate ester blended resin system are POSS modified diphthalonitrile The mass percent content of dicyanonitrile prepolymer is 10-50%. The blended resin system of the invention has good temperature resistance, and the glass transition temperature is higher than 400 DEG C. The invention is applied in the field of forming heat-resistant composite material products.

Description

technical field [0001] The invention relates to a temperature-resistant and flame-retardant POSS modified bisphthalonitrile and cyanate blend resin system. Background technique [0002] Bisphthalonitrile polymer has attracted extensive attention of domestic and foreign scholars for its excellent heat resistance and flame retardancy. However, the resin is solid at room temperature and has a high melting point, so only the RTM method can be used for composite molding, which will greatly limit the application of the resin. If the prepreg lay-up molding method is used to prepare the composite material, a solvent needs to be used to dissolve the prepreg, but the solvent must be removed during the curing process. If the method is not appropriate, the compactness of the composite material will be affected. Contents of the invention [0003] The object of the present invention is to solve the problem of poor manufacturability of existing bisphthalonitrile polymers, and to provide...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L79/04C08L83/10C08G77/452C08G73/06
CPCC08G73/0672C08G77/452C08L79/04C08L83/10C08L2201/02C08L2201/08
Inventor 李晓丹张东兴陈辉景磊朱楠韩明轩武海鹏路明坤
Owner HARBIN FRP INST
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