An oil-well metal pipe according to the present disclosure has a pipe main body including a first end portion and a second end portion. The pipe main body includes a pin formed at the first end portion, and a box formed at the second end portion. The pin includes a pin contact surface including an external thread part, and the box includes a box contact surface including an internal thread part. The oil-well metal pipe according to the present disclosure also includes a resin coating containing a resin, a solid lubricant powder, and copper phthalocyanine on or above at least one of the pin contact surface and the box contact surface.

A method for preparing an estolide compound and an estolide compound prepared thereby are disclosed. The method for preparing an estolide compound includes: converting biomass fat into a fatty acid; separating the fatty acid into a C.sub.16 saturated fatty acid and a C.sub.18 unsaturated fatty acid; preparing a linear internal olefin (LIO); increasing an amount of oleic acid through partial hydrogenation of the C.sub.18 unsaturated fatty acid; synthesizing an estolide polymer through cross metathesis of the oleic acid; capping the C.sub.16 saturated fatty acid onto the estolide polymer; and reacting the estolide polymer with the linear internal olefin.

A method for preparing an estolide compound and an estolide compound prepared thereby are disclosed. The method for preparing an estolide compound includes: converting biomass fat into a fatty acid; separating the fatty acid into a C.sub.16 saturated fatty acid and a C.sub.18 unsaturated fatty acid; preparing a linear internal olefin (LIO); increasing an amount of oleic acid through partial hydrogenation of the C.sub.18 unsaturated fatty acid; synthesizing an estolide polymer through cross metathesis of the oleic acid; capping the C.sub.16 saturated fatty acid onto the estolide polymer; and reacting the estolide polymer with the linear internal olefin.

A coating composition for a lubricating coating film includes: (A) a phenolic resin (B) an epoxy resin having an epoxy equivalent weight of 600 to 4000; and (C) at least one type of solid lubricant. The epoxy equivalent weight is generally defined by the number average molecular weight per the number of epoxy groups in a single molecule. The coating composition has a weight ratio of component (A) to the total weight of component (A) and component (B) of at least 50 weight %. A lubricating coating film, formed from the coating composition, has a high level of flexibility on surfaces of various base materials.

The present invention relates to a mixture of polyalkylsiloxanes that cure at temperatures of about 170 C. while being unreactive under ambient conditions during storage or transport and which are obtained through a hydrosilylation reaction wherein a mixture of ethylenically unsaturated olefins consisting of 1-100% of one or more polyene(s), and 0-99 mol % of monounsaturated olefins with 6 to 15 carbon atoms is reacted with an amount of one or more polyalkylhydrosiloxanes in the presence of a hydrosilylation catalyst. Furthermore, the present invention relates to water-based compositions suitable for use in metal casting processes as a mold release agent comprising a mixture of polyalkylsiloxanes of the invention and a non-ionic surfactant. In addition, the present invention relates to the use of the polyalkylsiloxanes and mixtures of polyalkylsiloxanes as defined herein.

The invention relates to an aqueous lubricant composition comprising at least: water; at least one polyalkylene glycol; at least one antifreeze compound selected from glycols, preferably alkylene glycols; glycerol; diglycerol; triglycerol, and mixtures thereof; at least one gallic acid ester; andat least one pH-regulating additive, making it possible to maintain the pH of said lubricant composition between (8) and (15). It also relates to the use of such an aqueous lubricant composition, for lubricating and/or cooling the moving parts in a mechanical system or as a hydraulic fluid. The invention also relates to the use of at least one gallic acid ester as an additive for improving the tribological properties of an aqueous lubricant composition.

The invention relates to an aqueous lubricant composition comprising at least: water; at least one polyalkylene glycol; at least one antifreeze compound selected from glycols, preferably alkylene glycols; glycerol; diglycerol; triglycerol, and mixtures thereof; at least one gallic acid ester; andat least one pH-regulating additive, making it possible to maintain the pH of said lubricant composition between (8) and (15). It also relates to the use of such an aqueous lubricant composition, for lubricating and/or cooling the moving parts in a mechanical system or as a hydraulic fluid. The invention also relates to the use of at least one gallic acid ester as an additive for improving the tribological properties of an aqueous lubricant composition.

A fluorine-containing ether compound represented by the following formula. R.sup.1CH.sub.2R.sup.2[CH.sub.2R.sup.3CH.sub.2R.sup.2].sub.xCH.sub.2R.sup.4 (x is 1 or 2, R.sup.2 is a perfluoropolyether chain, R.sup.3 is represented by Formula (2), and R.sup.1 and R.sup.4 are each a terminal group having 1 to 50 carbon atoms, which has 1 to 4 polar groups, and in Formula (2), a1 and a2 are each 0 to 5, b is 0 or 1, and Y is an acyclic divalent saturated hydrocarbon group having 2 to 8 carbon atoms)

##STR00001##

A fluorine-containing ether compound represented by the following formula. R.sup.1CH.sub.2R.sup.2[CH.sub.2R.sup.3CH.sub.2R.sup.2].sub.xCH.sub.2R.sup.4 (x is 1 or 2, R.sup.2 is a perfluoropolyether chain, R.sup.3 is represented by Formula (2), and R.sup.1 and R.sup.4 are each a terminal group having 1 to 50 carbon atoms, which has 1 to 4 polar groups, and in Formula (2), a1 and a2 are each 0 to 5, b is 0 or 1, and Y is an acyclic divalent saturated hydrocarbon group having 2 to 8 carbon atoms)

##STR00001##

A fluorine-containing ether compound represented by the following formula. R.sup.1CH.sub.2R.sup.2aCH.sub.2R.sup.3aCH.sub.2R.sup.2bCH.sub.2R.sup.3bCH.sub.2R.sup.2cCH.sub.2R.sup.3cCH.sub.2R.sup.2dCH.sub.2R.sup.4 (R.sup.2a, R.sup.2b, R.sup.2c and R.sup.2d are each a perfluoropolyether chain, R.sup.3a, R.sup.3b, and R.sup.3c are each a divalent linking group having one or more polar groups, at least one of R.sup.3a, R.sup.3b, and R.sup.3c is represented by OCH.sub.2CH(OH)CH.sub.2O, and R.sup.1 and R.sup.4 are each a terminal group having 1 to 50 carbon atoms and one or more polar groups, and may be the same as or different from each other)