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High-temperature-resistant honeycomb core strip adhesive and preparation method and application thereof

A honeycomb core, high temperature resistant technology, used in adhesives, non-polymer adhesive additives, adhesive types, etc., can solve the problems of poor compression resistance and shear resistance of honeycomb core materials, honeycomb adhesion, and high cost. , to achieve the effect of improving infiltration phenomenon, improving preparation efficiency and good processability

Active Publication Date: 2020-08-25
AEROSPACE RES INST OF MATERIAL & PROCESSING TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Honeycomb substrates with a temperature resistance above 300°C include titanium alloy metal foil, glass cloth and high temperature resistant paper, but the density of titanium alloy metal foil is too high to meet the needs of light weight; high temperature resistant paper (PBO paper or PI paper, etc. , fibers randomly distributed) technology maturity and stability are not good, the cost is expensive, especially the prepared honeycomb core material has poor compressive and shear properties
Commonly used modifiers for toughening and modifying thermosetting resins include rubber elastomers and thermoplastic resins. Although rubber elastomers have good manufacturability, their temperature resistance grades are low; thermoplastic resins have high temperature resistance grades, but they dissolve in the main resin. Increase the viscosity of the core strip glue, especially in order to ensure a good toughening effect, it is necessary to add a sufficient amount of thermoplastic resin, which will lead to a substantial increase in the viscosity of the core strip glue, and serious wire drawing will occur when the core strip glue is coated. Process defects that cause massive sticking of honeycombs

Method used

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  • High-temperature-resistant honeycomb core strip adhesive and preparation method and application thereof
  • High-temperature-resistant honeycomb core strip adhesive and preparation method and application thereof
  • High-temperature-resistant honeycomb core strip adhesive and preparation method and application thereof

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preparation example Construction

[0034] According to a second aspect of the present invention, there is provided a method for preparing a high-temperature-resistant honeycomb core strip, which is used to prepare the honeycomb core strip described in the first aspect above, comprising the following steps:

[0035] Step 1: Add 1 / 4 to 1 / 3 of the thermoplastic resin to the active modifier, dissolve it in the range of 100 to 150°C, then lower the temperature to below 80°C, and add the remaining thermoplastic resin and inorganic nanoparticles to the active modifier Among modifiers, stir and disperse to obtain component A;

[0036]Step 2, under the condition of stirring at room temperature, adding the polyimide resin and component A into the solvent for dissolving and dispersing to obtain a uniform and stable honeycomb core strip glue.

[0037] In the present invention, 1 / 4 to 1 / 3 of the thermoplastic resin is pre-dissolved in the active modifier, which makes the prepared core strip glue have a certain viscosity and...

Embodiment 1

[0043] The high-temperature-resistant honeycomb core strip adhesive is prepared from the components of the mass ratio in Table 1 below:

[0044] Table 1

[0045] ingredient name content Remark factory thermosetting polyimide 100g phenynyl capped Institute of Chemistry, Chinese Academy of Sciences Alkynyl benzoxazine resin 40g Sichuan University thermoplastic polyimide resin 25g Particle size 18μm Evonik Nano silica 10g 200nm Evonik acetone 300g chemically pure Sinopharm Chemical Reagent

[0046] The high temperature resistant honeycomb core strip adhesive is prepared by the following method:

[0047] Preparation of component A: Weigh 7g of thermoplastic polyimide resin and add it to 40g of alkynyl benzoxazine resin, heat to 120°C and keep it warm until the thermoplastic polyimide resin is dissolved and transparent, then add 18g of thermoplastic polyimide resin under the condition of cooling to 50°C Polyimid...

Embodiment 2

[0053] The high-temperature-resistant honeycomb core strip adhesive is prepared from the components of the mass ratio in Table 2 below:

[0054] Table 2

[0055]

[0056] The high temperature resistant honeycomb core strip adhesive is prepared by the following method:

[0057] 1. Preparation of component A: Weigh 5g of thermoplastic polyamide-imide resin and add it to 60g of bismaleimide resin, heat to 120°C and keep it warm until the thermoplastic polyamide-imide resin is dissolved and transparent, then cool down to below 80°C , Add 15g of thermoplastic polyamideimide resin and 5g of nano-silica at 70°C, and disperse evenly at high speed.

[0058] 2. Preparation of high-temperature-resistant core strip glue: under the condition of high-speed stirring at room temperature, add 85g of component A and 100g of thermosetting polyimide resin into 210g of butanone, dissolve, mix and disperse evenly.

[0059] The room temperature tensile shear strength (GB / T7124-2008) of the high...

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Abstract

The invention provides a high-temperature-resistant honeycomb core strip adhesive and a preparation method and application thereof, and belongs to the technical field of honeycomb core material preparation. The core strip adhesive is prepared from the following components in parts by mass: 100 parts of polyimide resin; 5-60 parts of an active modifier; 10-35 parts of thermoplastic resin; 1-15 parts of inorganic nanoparticles; 150-350 parts of solvent. The preparation method comprises the following steps: adding 1 / 4-1 / 3 of the thermoplastic resin into the active modifier, dissolving at 100-150DEG C, cooling to below 80 DEG C, adding the remaining thermoplastic resin and inorganic nanoparticles into the active modifier, and stirring and dispersing to obtain a component A; and adding polyimide resin and the component A into a solvent for dissolving and dispersing under a room-temperature stirring condition to obtain the uniform and stable honeycomb core strip adhesive. The core strip adhesive has the characteristics of good manufacturability, low curing temperature, high temperature resistance, excellent mechanical properties and the like, and is especially suitable for preparation of ultrathin glass cloth honeycombs.

Description

technical field [0001] The invention belongs to the technical field of honeycomb preparation, and relates to a high-temperature-resistant honeycomb core strip adhesive, a preparation method and an application thereof. Background technique [0002] Honeycomb sandwich structure composite materials are widely used because of their advantages such as high specific strength, good impact resistance, vibration reduction, wave penetration, and strong designability, especially in the field of aerospace. One of the indispensable structural materials. With the continuous improvement of application requirements, the requirements for light weight and temperature resistance of composite materials are also continuously improved. At present, in the honeycomb sandwich structure, the two types of main materials, the honeycomb core and the panel, still have a relatively large difference in temperature resistance. The development and application of resin-based composite materials with a temper...

Claims

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Application Information

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IPC IPC(8): C09J179/08C09J161/34C09J179/04C09J11/04
CPCC09J179/08C09J11/04C08L2205/025C08L2205/03C08L2205/035C08K2201/011C08L2201/08C08L79/08C08L61/34C08K3/36C08L79/04C08K3/04
Inventor 张东霞赵伟栋赵培晔崔超赵云峰孙宏杰樊孟金陈薇张云鹭
Owner AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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