High temperature resistant radar wave absorbing coating and preparation method thereof

Abstract

The high temperature resistant radar wave absorbing coating and its preparation method relate to an electromagnetic wave absorbing coating. The components of the invention include carbonyl iron powder, epoxy resin, polyurethane prepolymer, silane coupling agent and mixed ketone organic solvent, in parts by weight Calculated, the content of each component is: carbonyl iron powder 65~69; epoxy resin 19~22; polyurethane prepolymer 30~33; KH560 silane coupling agent 0.4~0.8; methyl ethyl ketone and cyclohexanone mixed solvent 25~35 . The present invention applies a wide frequency band. The frequency of use of the absorbing coating can achieve a loss effect of more than -3.5dB in the range of X and Ku bands (8-18GHz).

Description

technical field [0001] The invention relates to an electromagnetic wave absorbing paint, in particular to a high temperature resistant absorbing paint and a preparation method thereof. Background technique [0002] In 1975, the U.S. Air Force first listed "reducing characteristic signals" as an important part of the advanced fighter concept in "Advanced Tactical Fighter Technology Evaluation and Integration". With the rapid development of electronic communication technology, various detection technologies continue to Breakthroughs, the stealth performance of aircraft has increasingly become one of the key factors in the "air dominance" capability. [0003] Stealth mainly includes radar detection and infrared detection stealth. Two methods are usually used in stealth design at home and abroad: the first is the appearance structure design stealth, such as the sawtooth structure design on the edge to enhance the scattering of electromagnetic waves, reduce the vertical structure...

AI Technical Summary

Problems solved by technology

During the flight and maneuvering of the aircraft, the temperature of the absorbing material increases due to friction and heat transfer, which requires the absorbing coating attached to its surface to withstand high temperatures, and is usually used as a binder for absorbing materials There are epoxy resin systems, acrylic resin systems, etc. Although they have good adhesion, the three-dimensional network microstructure formed after curing leads to obvious deterioration in flexibility and impact resistance. Withstand high temperature use conditions, whether it can meet the high temperature resistance becomes the key indicator to determine whether this type of absorbing coating can be used

Images