This invention provides a threaded connection for oil country tubular goods that can suppress an increase in torque when making up a pin and a box in a cold climate. A threaded connection for oil country tubular goods of the present embodiment includes a pin and a box. The pin and the box each have a contact surface that has a thread portion and an unthreaded metal contact portion. The contact surface of the pin includes a photocured coating as an uppermost layer. The photocured coating contains a photocurable resin and perfluoropolyether. The contact surface of the box includes a solid lubricating coating as an uppermost layer.

Defoaming agents comprising a silicone oil and silica particulates, lubricating oil compositions comprising the defoaming agent, methods of lubrication using a lubricating oil composition comprising the defoaming agent, and methods of reducing the foaming tendency/stability and/or improving the air release rates of non-aqueous fluids, such as lubricant oils, are provided.

A coating composition for imparting a hydrophobic film on a target surface is provided that includes an oil of a silicone oil or a fluoropolymer oil or a combination thereof, a resin, and a dry lubricant. A solvent is present to form a solution of the oil and resin. A coating is imparted to an applicator that in turn can transfer the coating as a hydrophobic film. The coating composition is stable and able to impart hydrophobic film even after storage for several weeks at elevated temperature. The coating composition does so through the exclusion of synthetic waxes especially including silicone waxes. A kit is also provided that includes a wiper blade having the above coating composition applied along with instructions for the securement of the wiper blade to a vehicle to impart the hydrophobic film to a vehicle windshield contacted by the wiper blade.

A lubricant comprising (a) an oil of lubricating viscosity; (b) a polyether of number average molecular weight 1000 to 10,000; said polyether comprising alkylene oxide monomer units, where the alkylene group contains 3 to 6 carbon atoms, and ethylene oxide monomer units; and (c) one or more anti-foam agents, where the lubricant has a sulfated ash content of less than about 0.7 percent, is useful for lubricating a stationary gas engine where the engine drives a compressor and where both the engine and the compressor are lubricated with the same lubricant.

Provided is a silicone anti-foaming agent composition that not only has superior anti-foaming speed but also in which anti-foaming performance is not reduced even when used repeatedly or over a long period. The composition comprises: a polyorganosiloxane polymer crosslinked product having a polyoxyalkylene group, which includes: moiety structure (I): -R.sup.1-(R.sup.2.sub.2SiO).sub.d-R.sup.1(where R.sup.1 represents an alkylene group bonded to a silicon atom on the polysiloxane chain, R.sup.2 represents a monovalent hydrocarbon group, and d is 200 to 1000); and moiety structure (II): (C.sub.eH.sub.2e)O(EO).sub.x-(PO).sub.y-(BO).sub.z-R.sup.3 (where a single bond on the left end is bonded to a silicon atom on the polysiloxane chain, R.sup.3 represents a hydrogen atom, an alkyl group, an aryl group or an acyl group, e is 2 to 10, (x+y+z) is 40 to 100, x is 15 to 50, y is 15 to 50, and z is 0 to 50).

A refrigerator oil composition used in a refrigerant containing one or more unsaturated fluorinated hydrocarbon compounds selected from compounds represented by the following general formula (1): C.sub.xF.sub.yH.sub.z (1), wherein x is an integer of 2 to 6, y is an integer of 1 to 11, z is an integer of 1 to 11, and there are one or more carbon-carbon unsaturated bonds in the molecule, the refrigerator oil composition containing a base oil (A) that includes polyvinyl ether, a modified silicone compound (B), and a specific epoxy compound (C).

This invention relates to a lubricating oil composition, or concentrate therefor, comprising or resulting from the admixing of: (i) base oil, (ii) one or more styrenic block copolymers having a radial structure where one or more blocks derived from conjugated diene monomers are distal to the radial center and one more blocks derived from vinyl aromatic monomers that are proximal to the radial center, and (iii) optionally one or more dispersants and or detergents.

A lubricating oil composition comprising (A) a lubricating oil base oil the kinematic viscosity of which at 100 C. is in the range of from 1.4 to 6 mm.sup.2/s, (B) from 250 to 2000 ppm in terms of molybdenum of a molybdenum dialkyldithiocarbamate, (C) from 20 to 500 ppm in terms of sulphur of tetrabenzyl thiuram disulphide and (D) from 0.05 to 3.0 mass % of an amine. The lubricating oil composition of the present invention has a superior friction reducing effect and which has a superior fuel economy effect.

New compositions of matter that provide lubricant properties when cured into a coating on a substrate. The compositions are low molecular weight structured polysilicate compositions that have high silanol contents. The polysilicates are combined with a condensation catalyst and allowed to cure on the appropriate substrate. The cured coating has lubricant properties.

The invention concerns a threaded tubular component for drilling or working hydrocarbon wells, said tubular component having at one of its ends (1; 2) a threaded zone (3; 4) produced on its outer or inner peripheral surface depending on whether the threaded end is male or female in type, characterized in that at least a portion of the end (1; 2) is coated with a lubricating dry film (12) the matrix (13) of which comprises at least one migrating sliding agent (9) belonging to the oils or waxes family and principally distributed at the surface of the lubricating dry film (12) such that the coefficient of friction of the film (12) is less than 0.07 at loads of less than 40 N while the coefficient of friction of the film (12) is more than 0.1 at loads of more than 200 N.