Novel non-symmetric, partially fluorinated compositions and method of manufacture which are useful as lubricants or as additives to lubricant formulations involving the molecular structure:
R1f—F′—R2—F″—R3h
where R1f represents a wholly or partially fluorinated organic residue end group, F′ and F″ represent functional linkages which may be alike or different, R2 represents the backbone and R3h represents a non-fluorinated organic residue end group. Such compositions are produced by reacting a mixture of alcohols, mercaptans or amines containing at least one partially fluorinated compound and at least one non-fluorinated compound in the mixture, thus producing the R1f and the R3h residues, with a difunctional organic compound (e.g., diacid, dinitrile, disulfonyl halide, diisocyanate, diisothiocyanate, diphosphoryl halide or dithiophosphoryl halide).
作者:Xiaobai Wang、Qun Ye、Jing Song、Ching Mui Cho、Chaobin He、Jianwei Xu
DOI:10.1039/c4ra15108a
日期:——
A series of fluorinatedpolyhedraloligomericsilsesquioxane (POSS) derivatives were prepared via hydrosilylation reaction and they were characterized by 1H, 13C, 29Si and 19F nuclear magnetic resonance (NMR) spectroscopy and elemental analysis. The thermal stability of POSS derivatives was studied using thermogravimetric analysis (TGA) and they exhibited high decomposition temperatures ranging from
The present invention relates to a process for the preparation of scratch-resistant coatings by dual cure of compositions comprising surface active benzoyl compounds wherein at least one non-polar fluorinated alkyl group is present. The invention also relates to a process for concentrating these surface-active photoinitiators in the surface of coatings, to novel surface active benzoyl compounds wherein at least one non-polar fluorinated alkyl group is present, to compositions wherein the novel surface active fluorinated photoinitiators are present, and to a method for improving the flow of a curable composition on substrates.
Acid Catalyzed Stereocontrolled Ferrier-Type Glycosylation Assisted by Perfluorinated Solvent
作者:Zhiqiang Lu、Yanzhi Li、Shaohua Xiang、Mengke Zuo、Yangxing Sun、Xingxing Jiang、Rongkai Jiao、Yinghong Wang、Yuqin Fu
DOI:10.3390/molecules27217234
日期:——
stereoselective formation of O-/S-glycosidic linkages that occurs via a Ferrier rearrangement of acetylated glycals. In this system, the weak interactions between perfluoro-n-hexane and substrates could augment the reactivity and stereocontrol. The initiation of transformation requires only an extremely low loading of resin-H+ and the mild conditions enable the accommodation of a broad spectrum of glycal donors
Process for the preparation of rigid polyurethane foam by reaction of a polyfunctional isocyanate-reactive composition with a polyisocyanate composition comprising the reaction product of a stoichiometric excess of an organic polyisocyanate and a substantially fluorinated isocyanate-reactive compound, optionally in the presence of an inert, insoluble fluorinated compound.