METHOD OF OBTAINING POLYMER COMPOSITION FOR HIGH-FREQUENCY ENERGY ABSORBING Russian patent published in 2017 - IPC C08J3/20 C08L83/04 C08K3/18 C08K5/54 H01Q17/00 C08J5/00 

FIELD: radio engineering, communication.

SUBSTANCE: method of obtaining a polymer composition for high-frequency energy absorbing is based on the fact that components of the polymer composition are mixed to absorb high-frequency energy of the following makeup pts. wt.: a low molecular dimethylsiloxane caoutchouc SKTN 15-25, carbonyl iron P-10 105-175, a cold curing accelerator No. 68 1.5-2.5, ethyl silicate-40 1.5-2.5 and cured. The method includes the steps of weighing rubber of a low molecular dimethylsiloxane caoutchouc SKTN and ethyl silicate-40, the mixing these components to a uniform state for 10 minutes at a temperature of 25±10°C, then injecting into this mixture the carbonyl iron P-10, previously dried at a temperature of 120±5°C for 2-3 hours in a pan of a 2-3 cm, cooled to a temperature of 25±10°C and sieved through a sieve № 0.05. A mixture of a low molecular dimethylsiloxane caoutchouc SKTN, ethyl silicate-40, carbonyl iron P-10 is thoroughly mixed for 10 minutes at a temperature 25±10°C. Then, a cold curing accelerator No. 68 is injected into the prepared mixture and the mixture is mixed for 10 minutes at a temperature 25±10°C. The final mixture is kept at a temperature of 25±10°C for 10 minutes to remove air bubbles. Curing is carried out at a temperature of 25±10°C with not less than 20 hours, then at a temperature of 160±5°C for 7 hours.

EFFECT: reduction of shrinkage of the composition after its curing, ensuring the stability of the composition after exposuring high temperature and cyclic temperature changes, increasing the attenuation of the microwave signal wave.

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