FIELD: organic chemistry and technology. SUBSTANCE: product: polymethyl(hexafluoroalkyl)siloxanes of the general formula $$$ where: n = 1-3 and $$$. Products were synthesized by copolymerization of 1,3,5-trimethyl-1,3,5-tris-(hexafluoroalkyl)-cyclotrisiloxane and 1,3,5-trimethyl-1,3,5-trivinylcyclotrisiloxane at mole ratio = 1:(0.0015-0.009), respectively, at 100-120 C in the presence of $$$-disodium hydroxypolymethyl-3,3,3-trifluoropropylsiloxane. Synthesized siloxanes were used in different industry branches. EFFECT: enhanced resistance of fluoro-containing siloxane polymers. 1 tbl
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