摘要:
It is an object of the present invention to provide a grease composition, for an outer ring rotation type rolling bearing, which is capable of satisfying all of high-temperature durability, low-temperature property, peeling resistance, and rust-preventive property. A grease composition (7) to be enclosed in the outer rig rotation type rolling bearing for use in automotive electric auxiliary machines contains base oil, a thickener, a peeling-resistant additive, a wear-resistant additive, and a rust-preventive agent. The base oil is mixed oil of trimellitic acid ester oil and synthetic hydrocarbon oil mixed therewith in a mass ratio of (70:30) to (90:10). The thickener consists of a diurea compound shown by a formula (1). €ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒR 1 -NHCONH-R 2 -NHCONH-R 1 €ƒ€ƒ€ƒ€ƒ€ƒ(1) wherein a reference symbol R 2 denotes a divalent aromatic hydrocarbon group having a carbon number of 6 to 15, and a reference symbol R 1 denotes a cyclohexyl group.
摘要:
The invention relates to a new ultra-thin hydrophobic and oleophobic layer formed by self-assembly on a surface of a solid substrate having compounds of the general formula A-B in which A is a group having the formula (I) in which Z is C or N+; X is C-H or C-L, wherein L is an electroattractive group chosen from F, CF3, NO2 and N(CH3)3+; Y is H or CH3, or Y, together with X, forms a heterocycle of 5 or 6 atoms; T is NH, CO, CONH or NH2+U-, wherein U- is a soluble anion, and B is a C1-C20 aliphatic linear alkyl group replaced partially or completely by F. The invention also relates to a method for preparing said layer and its use as a barrier film.
摘要:
It is an object of the present invention to provide a grease composition, for an outer ring rotation type rolling bearing, which is capable of satisfying all of high-temperature durability, low-temperature property, peeling resistance, and rust-preventive property. A grease composition (7) to be enclosed in the outer rig rotation type rolling bearing for use in automotive electric auxiliary machines contains base oil, a thickener, a peeling-resistant additive, a wear-resistant additive, and a rust-preventive agent. The base oil is mixed oil of trimellitic acid ester oil and synthetic hydrocarbon oil mixed therewith in a mass ratio of (70:30) to (90:10). The thickener consists of a diurea compound shown by a formula (1).
R 1 -NHCONH-R 2 -NHCONH-R 1 (1)
wherein a reference symbol R 2 denotes a divalent aromatic hydrocarbon group having a carbon number of 6 to 15, and a reference symbol R 1 denotes a cyclohexyl group.
摘要:
The invention provides a grease composition containing a thickener, a base oil and an antistatic agent, where the antistatic agent includes at least one selected from the group consisting of Li(CF 3 SO 2 ) 2 N and Li(CF 3 SO 2 ) 3 C; and a mechanical part where the above-mentioned grease composition is packed. The composition of the invention shows satisfactory results in the antistatic properties and the acoustic property.
摘要:
L'invention concerne une nouvelle couche ultra-mince hydrophobe et oléophobe formée par auto-assemblage sur une surface de substrat solide de composés de formule générale
A-B
dans laquelle A représente un groupe de formule
dans laquelle Z représente C ou N + , X représente C-H ou C-L, L étant un groupe électroattracteur choisi parmi F, CF 3 , NO 2 et N(CH 3 ) 3 + , Y représente H ou CH 3 , ou Y forme avec X un hétérocycle de 5 ou 6 atomes, T représente NH, CO, CONH ou NH 2 + U - , U - étant un anion soluble , et
B représente un groupe alkyl linéaire aliphatique C 1 -C 20 non substitué ou substitué partiellement ou complètement par F, ainsi qu'un procédé pour préparer cette couche et son utilisation comme film barrière.