A method of manufacturing cyclophosphazenes PFPE derivatives to be used in the lubrication of magnetic recording media is herein provided. The method comprises: a) a (per)fluoropolyether (PFPE) polyol [PFPE (P.sub.pol)] comprising a fluoropolyoxyalkylene chain (R.sub.f) having two chain ends, each chain end comprising at least one hydroxy group, and b) the corresponding alkoxide of perfluoropolyether (P.sub.pol) [PFPE (P.sub.alk)] wherein the equivalent concentration of PFPE (P.sub.alk) in PFPE (P.sub.pol) is lower than 30%, preferably ranging from 5% to 15%; 2) contacting mixture (M) with a perhalocyclophosphazene (CP.sub.halo) to provide a mixture (M1) containing an equivalent ratio of PFPE (P.sub.alk)/(CP.sub.halo) of at least 1; 3) allowing mixture (M1) to react until complete disappearance of PCl groups to provide a mixture (M2); 4) submitting mixture (M2) to hydrolysis to provide a mixture (M3); 5) optionally removing (P.sub.pol) from mixture (M3) to provide a mixture (M4). A method of purifying mixture (M4) is also herein provided.

The present disclosure relates to methods, systems, hydraulic fluids and additives for reducing the rate of surface current degradation for components in a hydraulic system, wherein the hydraulic system is exposed to phosphate-ester-based hydraulic fluid.

The present disclosure relates to methods, systems, hydraulic fluids and additives for reducing the rate of surface current degradation for components in a hydraulic system, wherein the hydraulic system is exposed to phosphate-ester-based hydraulic fluid.

A coating is provided for use in an electro-cautery probe of a cauterization device to mask odors generated during a cauterization procedure. The coating is also provided to increase the longevity of the odor masking and prevent tissue charring.

A coating is provided for use in an electro-cautery probe of a cauterization device to mask odors generated during a cauterization procedure. The coating is also provided to increase the longevity of the odor masking and prevent tissue charring.

A lubricant compound is contained in a lubrication layer of a magnetic disk in which at least a magnetic layer, a protective layer, and a lubrication layer are sequentially provided on a substrate, and the lubricant compound contains a component A represented by Chemical formula 1 and a component B represented by Chemical formula 2: ##STR00001##
wherein X in Chemical formula 1 represents OH ##STR00002##
wherein X in Chemical formula 2 represents OCH.sub.2CH(OH)CH.sub.2OH,
and the lubricant compound further contains a component C made of a specific compound having a phosphezene ring in the structure thereof.

The present disclosure relates to methods, systems, hydraulic fluids and additives for reducing the rate of surface current degradation for components in a hydraulic system, wherein the hydraulic system is exposed to phosphate-ester-based hydraulic fluid.

The present disclosure relates to methods, systems, hydraulic fluids and additives for reducing the rate of surface current degradation for components in a hydraulic system, wherein the hydraulic system is exposed to phosphate-ester-based hydraulic fluid.

The present invention provides methods of reducing friction on a surface of an apparatus that stores or transports a gas, comprising: (a) contacting the surface either directly or through an intermediate organometallic layer with a fluorinated material in a diluent, wherein the fluorinated material has the following structure: ##STR00001##
wherein A is an oxygen radical or a chemical bond; n is 1 to 20; Y is H, F, C.sub.nH.sub.2n+1 or C.sub.nF.sub.2n+1; X is H or F; b is at least 1, m is 0 to 50, p is 1 to 20, and Z is an acid group or an acid derivative; (b) forming a hydrophobic surface layer on the surface; and (c) introducing the gas into the apparatus.

The present invention provides methods of reducing friction on a surface of an apparatus that stores or transports a gas, comprising: (a) contacting the surface either directly or through an intermediate organometallic layer with a fluorinated material in a diluent, wherein the fluorinated material has the following structure: ##STR00001##
wherein A is an oxygen radical or a chemical bond; n is 1 to 20; Y is H, F, C.sub.nH.sub.2n+1 or C.sub.nF.sub.2n+1; X is H or F; b is at least 1, m is 0 to 50, p is 1 to 20, and Z is an acid group or an acid derivative; (b) forming a hydrophobic surface layer on the surface; and (c) introducing the gas into the apparatus.