A method is provided that forms a solid film on a bearing component of a rolling bearing. A solution containing a fluorine compound and a lubricant having no functional group is allowed to adhere to the bearing component as a liquid film, the fluorine compound containing 3-(trimethoxysilyl) propyl methacrylate, hexafluoropropene, and methyl methacrylate as components. The solid film is formed on the at least one of the bearing components by hardening the adhering liquid film.

A lubrication structure for a shock absorber of a vehicle has a protecting pipe and a self-lubricating layer. The protecting pipe is a non-circular metal tube and has an elongated slit. The self-lubricating layer is an engineering plastic layer, is deposited in the protecting pipe and has a shaft hole. When the lubrication structure is deposited between an outer tube and an inner tube of a shock absorber of a vehicle, the protecting pipe engages in the outer tube to prevent the self-lubricating layer from contacting the outer tube directly. The self-lubricating layer with a small friction coefficient is mounted around the inner shaft to enable the inner shaft to move smoothly relative to the outer tube. The lubrication structure has characteristics of low cost, small volume, and small tolerance, and the life and the practicality of the lubrication structure can be improved.

The present invention relates to the field of lubricant, and specifically provides a lubricant composition and its preparation method and use. The lubricant composition comprises a base oil and rubber particles having radiation crosslinked structure dispersed therein, wherein the base oil is continuous phase and the rubber particles are dispersed phase. The viscosity of the lubricant composition of the present invention can be effectively adjusted as temperature changes. As compared with the lubricant composition comprising chemically crosslinked rubber particles, it has a lower viscosity at low temperatures and a higher viscosity at high temperatures, and has a relatively high viscosity index, which can meet the application requirements at the temperature above 200? C. In addition, the lubricant composition of the present invention also has excellent antiwear and friction-reducing properties.

A fluorine-containing ether compound of the present invention is represented by Formula (1).

R.sup.1CH.sub.2R.sup.2CH.sub.2R.sup.3(1)

(In Formula (1), R.sup.1 is an organic end group having 3 or more carbon atoms which includes two or more polar groups with each polar group being bonded to different carbon atoms and the carbon atoms to which the polar groups are bonded being bonded to each other via a linking group including the carbon atoms which are not bonded to the polar groups, R.sup.2 includes a perfluoropolyether chain represented by Formula (3), and R.sup.3 is a hydroxyl group or R.sup.1)

(CF.sub.2).sub.y-1O((CF.sub.2).sub.yO).sub.z(CF.sub.2).sub.y-1(3)

(In Formula (3), y represents an integer of 2 to 4, and z represents an integer of 1 to 30).

Provided herein is a lubricant including a compound of Formula I

L-(CF.sub.2CF.sub.2O).sub.nCF.sub.2CH.sub.2ONOCH.sub.2CF.sub.2O(CF.sub.2CF.sub.2O).sub.m-M (Formula I) wherein L is selected from the group consisting of

##STR00001## M is selected from the group consisting of

##STR00002## wherein each instance of R.sup.1, R.sup.2, and R.sup.3 is independently selected from the group consisting of hydroxyl, alkoxyl, carbocycyl, phenyl, heterocycyl, piperonyl, carboxyl, alkylamido, acetamido, carbamoyl, N-alkylcarbamoyl, N,N-dialkylcarbamoyl, 2,3-dihydroxy-l-propoxyl, acryloyl, alkacryloyl, methacryloyl, a sustituent of methyl methacrylate, and a substituent of glycidyl ether; and wherein n1, m1, and n and m are the same or different.

A sliding member having a coating film and a method for forming a coating film, which can realize both of improvement in lubricity of the coating film by using a solid lubricant and improvement in adhesiveness of the coating film to a ground, and a method for forming a coating film.

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.

Disclosed are materials that possess both low adhesion and the ability to absorb water. The material passively absorbs water from the atmosphere and then expels this water upon impact with debris, to create a self-cleaning layer. The lubrication reduces friction and surface adhesion of the debris (such as an insect), which may then slide off the surface. The invention provides a material comprising a continuous matrix including a polymer having a low surface energy (less than 50 mJ/m.sup.2) and a plurality of inclusions, dispersed within the matrix, each comprising a hygroscopic material. The continuous matrix and the inclusions form a lubricating surface layer in the presence of humidity. The material optionally contains porous nanostructures that inject water back onto the surface after an impact, absorbing water under pressure and then releasing water when the pressure is removed. The material may be a coating or a surface, for example.

A sliding material includes a resin, first particles disposed in the resin and composed of an inorganic material, and second particles disposed in the resin and composed of an inorganic material whose Vickers hardness is higher than a Vickers hardness of the first particles. When a value obtained by dividing a Vickers hardness of the second particles by the Vickers hardness of the first particles is defined as a hardness ratio and when a value obtained by dividing a contained amount of the first particles with respect to the resin by a contained amount of the second particles with respect to the resin is defined as a content ratio, a value obtained by dividing the hardness ratio by the content ratio is greater than or equal to 0.3 and less than or equal to 2.8.

A sliding material includes a resin, first particles disposed in the resin and composed of an inorganic material, and second particles disposed in the resin and composed of an inorganic material whose Vickers hardness is higher than a Vickers hardness of the first particles. When a value obtained by dividing a Vickers hardness of the second particles by the Vickers hardness of the first particles is defined as a hardness ratio and when a value obtained by dividing a contained amount of the first particles with respect to the resin by a contained amount of the second particles with respect to the resin is defined as a content ratio, a value obtained by dividing the hardness ratio by the content ratio is greater than or equal to 0.3 and less than or equal to 2.8.