POLYMER COMPOSITION FOR ABSORBING HIGH-FREQUENCY ENERGY Russian patent published in 2013 - IPC C09D5/32 C08L83/04 C08K3/08 H01Q17/00 

FIELD: chemistry.

SUBSTANCE: polymer composition contains low-molecular weight dimethylsiloxane rubber STKN as a base, a cold curing catalyst K-68, radio carbonyl iron P-10 as absorbing filler, additionally a solution of high-molecular weight rubber SKT in liquid polymethylsiloxane and tetraethoxysilane or derivatives thereof, as well as polyethylene polyamine as a curing rate controller. When producing the polymer composition, carbonyl iron is first bound with low-molecular weight rubber SKTN in a mixture with derivatives of tetraethoxysilane and liquid polymethylsiloxane (component A). The mixture (component A) is held for at least 24 hours. The rubber SKT is bound with another portion of the liquid polymethylsiloxane and tetraethoxysilane derivatives (component B) and also held for 24 hours. Component A and component B are mixed with each other immediately before adding the catalyst. The amount of catalyst K-68 or mixture thereof with polyethylene polyamine determines the overall rate of cure and controlled time of loss of fluidity of the composition.

EFFECT: obtaining a polymer composition with absorbent properties with small layer thickness, having sufficient strength and elasticity of the vulcanisate in a wide temperature range, shorter curing time and enabling control of the rate of cure.

2 cl, 4 tbl, 5 ex