Novel, lubricious coatings for medical devices are disclosed. The coatings provide improved lubricity and durability, and are readily applied in coating processes. The present invention is also directed to a novel platinum catalyst for use in such coatings. The catalyst provides for rapid curing, while inhibiting cross-linking at ambient temperatures, thereby improving the production pot life of the coatings.

In one aspect, lubricant compositions are described herein. In some embodiments, a lubricant composition described herein comprises a grease and milled metal sulfide particles dispersed in the grease. In other cases, a lubricant composition described herein comprises a grease, polytetrafluroethylene particles, zinc dithiophosphate, and molybdenum dialkyldithiocarbamate, wherein the polytetrafluroethylene particles, zinc dithiophosphate, and molybdenum dialkyldithiocarbamate are dispersed in the grease.

In one aspect, lubricant compositions are described herein. In some embodiments, a lubricant composition described herein comprises a grease and milled metal sulfide particles dispersed in the grease. In other cases, a lubricant composition described herein comprises a grease, polytetrafluroethylene particles, zinc dithiophosphate, and molybdenum dialkyldithiocarbamate, wherein the polytetrafluroethylene particles, zinc dithiophosphate, and molybdenum dialkyldithiocarbamate are dispersed in the grease.

A lubricant composition includes an oil including a plurality of long-chain hydrocarbon molecules. A quantity of a catalytically active metal-organic additive is mixed with the oil. The metal-organic additive is formulated to fragment the long-chain hydrocarbon molecules of the oil into at least one of dimers and trimers under the influence of at least one of a mechanical loading and a thermal loading. In some embodiments, the metal-organic additive includes a compound of formula II: ##STR00001##
where: X is Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Y, Zr, Nb, Mo, Tc, Ru, Rh, Pd, Ag, Cd, Hf, Ta, W, Re, Os, Ir, Pt, Au, Hg, Rf, Db, Sg, Bh, Hs, Mt, Ds, Rg or Cn, and R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are alkyl or alkyl halide.

A lubricating oil composition includes: a lubricant base having a kinematic viscosity at 100 C. of 1.0 to 10 mm.sup.2/s and % C.sub.P of no less than 70; (A) 0.1 to 30 mass % of a poly(meth)acrylate viscosity index improver having a PSSI of no more than 5, a weight average molecular weight of 10,000 to 500,000, a ratio A/B of less than 2.4 and a ratio C/B of less than 1.4, the ratio A/B being a ratio of a viscosity increase effect A on kinematic viscosity at 100 C. to a viscosity increase effect B on HTHS viscosity at 150 C., and the ratio C/B being a ratio of a viscosity increase effect C on kinematic viscosity at 150 C. to the viscosity increase effect B on HTHS viscosity at 150 C.; and (B) 0.01 to 2.0 mass % of a friction modifier.

A lubricating oil composition includes: a lubricant base having a kinematic viscosity at 100 C. of 1.0 to 10 mm.sup.2/s and % C.sub.P of no less than 70; (A) 0.1 to 30 mass % of a poly(meth)acrylate viscosity index improver having a PSSI of no more than 5, a weight average molecular weight of 10,000 to 500,000, a ratio A/B of less than 2.4 and a ratio C/B of less than 1.4, the ratio A/B being a ratio of a viscosity increase effect A on kinematic viscosity at 100 C. to a viscosity increase effect B on HTHS viscosity at 150 C., and the ratio C/B being a ratio of a viscosity increase effect C on kinematic viscosity at 150 C. to the viscosity increase effect B on HTHS viscosity at 150 C.; and (B) 0.01 to 2.0 mass % of a friction modifier.

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.

In one aspect, lubricant compositions are described herein. In some embodiments, a lubricant composition described herein comprises a grease and milled metal sulfide particles dispersed in the grease. In other cases, a lubricant composition described herein comprises a grease, polytetrafluroethylene particles, zinc dithiophosphate, and molybdenum dialkylthiocarbamate, wherein the polytetrafluroethylene particles, zinc dithiophosphate, and molybdenum dialkyldithiocarbamate are dispersed in the grease.

In one aspect, lubricant compositions are described herein. In some embodiments, a lubricant composition described herein comprises a grease and milled metal sulfide particles dispersed in the grease. In other cases, a lubricant composition described herein comprises a grease, polytetrafluroethylene particles, zinc dithiophosphate, and molybdenum dialkylthiocarbamate, wherein the polytetrafluroethylene particles, zinc dithiophosphate, and molybdenum dialkyldithiocarbamate are dispersed in the grease.