ELECTROMAGNETIC WAVE ABSORBING COATING Russian patent published in 2011 - IPC C09D5/32 C09D123/34 H01Q17/00 

FIELD: chemistry.

SUBSTANCE: invention relates to formulation and technology of applying electromagnetic wave absorbing coatings on metal or rubber surfaces. The coating for absorbing electromagnetic energy of radar signals in the wavelength range of 1-20 cm is used to lower effective reflecting power of metal and rubber surfaces of ground-based and sea objects (tanks, artillery mounts, ships) for antiradar masking from attack by weapons flying towards a target guided by a radar signal (missiles, artillery projectiles, aeroplanes) based on a composition which contains binder in form of chlorosulphonated polyethylene CSPE-MR which can absorb large amounts of electromagnetic energy and is dissolved in toluene. Also dispersed in the solution is 3-20 mm long carbon fibre on which an insulating coating is deposited, curing agents and a component with large volume of air pockets - micro-glass spheres. The composition contains chlorosulphonated polyethylene CSPE-MR, toluene, magnesium oxide (MgO), zinc oxide (ZnO), polyethylene glycol PEG-35 or monoalkylphenol ether of polyethylene glycol OP-7 or OP-10, diphenylguanidine, micro-glass spheres MSO-A9, carbon fibre UKN-300, used in the composition for a 1^st coating layer; carbon fibre Uglen R-9 used in the composition for a 2^nd coating layer; steorox-6. The first layer based on the said composition is deposited on metal or rubber surfaces primed with a primer based on glyptal resin in order to increase adhesion by spraying a thickness of up to 2.8-3.2 mm (providing approximately 20-22 passages) and holding after each passage at 15 - 35°C for not less than 15 minutes and drying after applying the 1^st layer at 15-35°C for not less than 24 hours or at 65 - 75°C for 3-4 hours. A 2^nd layer of the same composition is deposited on top of the 1^st layer, where carbon fibre Uglen R-9 is used instead of carbon fibre UKN-300, with total thickness of not less than 5.5 mm (approximately 18-20 passages) with holding and drying similar to those used when depositing the 1^st layer.

EFFECT: low effective reflecting power of metal and rubber surfaces of ground-based and sea objects (tanks, artillery mounts, ships) for their antiradar masking from attack by weapons flying towards a target guided by a radar signal (missiles, artillery projectiles, aeroplanes).

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