This article discusses the synthesis of polyorganosiloxanes with 1,1,1,2,2,3,3-heptafluoro-4,4-bis(trifluoromethyl)pentyl (R_f = CF₃CF₂CF₂C(CF₃)₂(CH₂)₃-) perfluoroalkyl substituents for the sake of hydrophobic coatings. Using perfluoroalkyl di- and trifunctional alkoxysilane derivatives, linear and branched siloxanes were obtained. The main emphasis of this work based on the simplicity of the proposed condensation approach in the active medium, the environmental component of the application of alkoxysilanes instead of toxic chlorosilanes, and the low cost and harmlessness of the perfluorinated compounds used. Varying the nature of the active medium, the ratio of reagents and temperature, it was shown that the polymers with the highest molecular weight (M_n ˃ 40,000) are obtained by refluxing the reaction mixture for 40 h in the ratio R_fSi(OEt)₃ + СH₃COOH = 1:15. The hydrophobizing ability of all the obtained polymers was tested by measuring the contact angle (θ) on glass and aluminum. Branched polymers with M_n = 37,600 and 42,000 showed the best results (θ ˃ 108). In addition, the work shows the prospects of hydrophobization ability of epoxy resins with the copolymers of triethoxysilane with branched perfluoroalkyl substituents and phenyltriethoxysilane in comparison with their known analogues.

本文讨论了具有1,1,1,2,2,3,3-七氟-4,4-双（三氟甲基）戊基（R _f = CF ₃ CF ₂ CF ₂ C（CF ₃）₂（ CH ₂）₃-）为了疏水涂层的全氟烷基取代基。使用全氟烷基二和三官能烷氧基硅烷衍生物，获得直链和支链硅氧烷。这项工作的主要重点是基于在活性介质中拟议的缩合方法的简便性，烷氧基硅烷代替有毒氯硅烷的应用的环境因素以及所用全氟化合物的低成本和无害性。改变所述活性介质，试剂和温度的比值的性质，它表明具有最高分子量的聚合物（M _Ñ通过回流反应混合物在比R 40小时得到˃40,000）_˚F的Si（OET ）₃  +СH ₃COOH = 1:15。通过测量在玻璃和铝上的接触角（θ）来测试所有获得的聚合物的疏水化能力。M _n  = 37,600和42,000的支化聚合物显示出最佳结果（θ˃108）。另外，与已知类似物相比，该工作显示了环氧树脂与具有支链全氟烷基取代基的三乙氧基硅烷和苯基三乙氧基硅烷的共聚物的疏水化能力的前景。