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High-strength low-temperature-resistant adhesive as well as preparation method and application thereof

An adhesive and low-temperature-resistant technology, applied in the field of aerospace materials, can solve the problems of low impact strength and unsatisfactory bonding strength, and achieve good bonding strength and high viscosity

Active Publication Date: 2021-05-28
九天行歌(山东)航天科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The aerospace adhesives in the prior art include high-temperature-resistant epoxy resin adhesives made of epoxy resin, curing agent, and accelerator. Knot strength is not ideal
In the prior art, there are also low-temperature resistant adhesives obtained from polyurethane and epoxy resin, but there is a technical problem of low impact strength

Method used

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  • High-strength low-temperature-resistant adhesive as well as preparation method and application thereof
  • High-strength low-temperature-resistant adhesive as well as preparation method and application thereof
  • High-strength low-temperature-resistant adhesive as well as preparation method and application thereof

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Experimental program
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preparation example Construction

[0057] The preparation method of above-mentioned adhesive comprises the following steps:

[0058] (1) Take castor oil and polyisocyanate, add them to reactor F1, mix at room temperature for 45-75min, then gradually raise the temperature of reactor F1 to 70-80°C, react for 3-5h, cool down to 45-55°C, keep warm After 8-12h, intermediate product A is obtained;

[0059] (2) Weigh the water and add it to the reaction kettle F2, gradually heat the reaction kettle F2 to 35~95°C, add the intermediate product A obtained in step (1) dropwise, the rate of addition is 3~5kg / min, at 35~95℃, Insulate at 95°C for 5-20 hours, vacuumize the reactor F2 until the vacuum degree reaches -0.08MPa, then gradually raise the temperature to 110-115°C, remove moisture, adjust the vacuum degree to above 0.098MPa, and keep warm at 110-115°C 1.5 to 2.5 hours to obtain the intermediate product B; the water content of the intermediate product B is below 0.1%;

[0060] (3) Add the defoamer and wetting agent...

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Abstract

The invention provides a high-strength low-temperature-resistant adhesive and a preparation method and application thereof. The adhesive is a castor oil / polyurethane amine novel epoxy curing adhesive, wherein the amine value is 200-300 mgKOH / g, the functionality is 7-13, the functionality is high, and the viscosity is large. The high-strength and low-temperature-resistant adhesive provided by the invention has good bonding strength, high and low temperature resistance, large-amplitude rapid temperature change resistance and impact resistance; wherein the bonding strength is 2 MPa or above and can reach 12 MPa; the adhesive can resist the low temperature of -30 DEG C or below, can resist the low temperature of -120 DEG C, and is not embrittled, separated and shrunk at the ultralow temperature; the adhesive is not damaged when the temperature is changed from -120 DEG C to 110 DEG C; the bonding strength retention rate after high-frequency impact is 75% or above and can reach 97%, the performance is excellent, and high-load and high-frequency vibration impact generated when a rocket lifts off and recovers five times can be borne.

Description

technical field [0001] The invention belongs to the technical field of aerospace materials, and in particular relates to a high-strength low-temperature-resistant adhesive and a preparation method and application thereof. Background technique [0002] Adhesives for aerospace are used in products such as launch vehicles, satellites, and spacecraft. Rockets, satellites, and spacecraft must withstand tests such as ultra-low temperature, ultra-high temperature, high vacuum, and ultraviolet rays due to the special launch environment and space orbit environment. Therefore, the adhesive used in the field of aerospace needs to have the characteristics of excellent high and low temperature resistance, high bond strength and high bond strength retention after high frequency impact resistance. The aerospace adhesives in the prior art include high-temperature-resistant epoxy resin adhesives made of epoxy resin, curing agent, and accelerator. Knot strength is not ideal. In the prior ar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J163/00C09J175/14C09J11/08C08G18/67
CPCC09J163/00C09J11/08C08G18/36C08L2201/08C08L75/14C08L33/04
Inventor 王志峰李兴宝张应宏刘炳申尹文良胡改娟姜媛陈博陈家恒
Owner 九天行歌(山东)航天科技有限公司
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