Abstract:
The present invention relates to a new grease intended particularly to be used in Hooke's joints in order to improve the NVH characteristics of said joints. According to the invention, the grease is comprised, expressed in weight % : 3 to 90 %, and preferably 40 to 70 % of a base oil; 2 to 80 %, and preferably 10 to 50 % of a thickening agent comprised of a dispersion of clay in oil; 0.5 to 10 %, and preferably 3 to 7 % of at least one organic molybdenum compound; 0 to 10 %, and preferably 1 to 5 % of at least one organic zinc compound; and 0 to 10 % of at least one conventional additive for grease.
Abstract:
A grease composition for use as a cable filling material which contains about 75 to 95 parts by weight of a base component of a liquid or semi-solid polyol having a molecular weight of at least 4000 and a reduced amount of mono-unsaturated compounds, about 1 to 15 parts by weight of a thickening agent such as colloidal particles of silica, and between 1 and 5 parts by weight of an antioxidant. Optionally, a thermoplastic elastomer can be added to improve bleed resistance.
Abstract:
A composition made by admixing a major amount of base oils of lubricating viscosity and minor amounts of additives. The additives can include a viscosity modifier, a dispersant, a friction modifier, an anti-oxidant, a suppressant, a tackifier, and thickeners. The dispersant can be a dissolved powered styrene-ethylene/propylene-block copolymer and the thickeners can be fumed silicia. The dispersants and the thickeners are pulverized and dissolved in the composition to provide for inhibition of oil separation during storage.
Abstract:
A tyre gel balancing composition having a storage modulus of between 3000 and 15000 Pa and the specific gravity less than 1000 kg/m in the temperature range between -20 and +90 DEG C, preferably its storage modulus is about 9000 Pa, is capable of balancing tyres by being able to flow under the vibrations caused by imbalance in a wheel assembly. The composition preferably comprises a mixture of: 1) paraffinic oils, polybutene oils, polyolesters or polyol ethers; 2) hydrophobic or hydrophilic fumed silica; 3) polyalkyl-methacrylates, styrene-ethylene-propylene block copolymers or polyhydroxycarboxylic acid derivatives; and optionally corrosion inhibitors and antioxidants.
Abstract:
A composition made by admixing a major amount of base oils of lubricating viscosity and minor amounts of additives. The additives can include a viscosity modifier, a dispersant, a friction modifier, an anti-oxidant, a suppressant, a tackifier, and thickeners. The dispersant can be a dissolved powered styrene-ethylene/propylene-block copolymer and the thickeners can be fumed silicia. The dispersants and the thickeners are pulverized and dissolved in the composition to provide for inhibition of oil separation during storage.
Abstract:
In a particular embodiment, the invention concerns a lubricating grease having 70 to 95 percent by weight of a mixture that includes at least a first ester of fatty acid and of sorbitan, and at least a second ester of fatty acid and of polyoxyalkylated sorbitan. The esters are present in quantities by weight, relative to the weight of the mixture, of 10 to 90 percent and 90 to 10 percent respectively. The grease also includes from 5 to 30 percent by weight of at least one thickening agent.
Abstract:
Elastic solids having reversible stress-induced fluidity are prepared, e.g., by combining liquid formulations with a crystalline mixed metal hydroxide conforming substantially to the formula Li.sub.m D.sub.d T(OH).sub.(m+2d+3+n.multidot.a) (A.sup.n).sub.a .multidot.xH.sub.2 O where m is amount of Li, d is amount of divalent metal D, T is a trivalent metal, A represents at least one anion or negative-valence radical of valence n and a is the amount of A, and xH.sub.2 O represents excess waters of hydration, if any. These make useful coatings. The instantly reversible fluidization of these unique elastic solids may be expressed as: .sigma.=k.sub..alpha. .epsilon. when .epsilon. F, (this equation represents a generalized form for the usual theological equations); for a cycle of .epsilon., -xF
Abstract:
The present invention provides a grease for copper electrical contacts having excellent properties which comprises polyol complex ester base oil and a specific amount of particular additives, i.e. quaternary ammonium salt-containing clay mineral, secondary aromatic amine antioxidant and a copper deactivator selected from the group consisting of benzotriazoles, thiodiazoles, and N,N'-disalicylidene- 1,2-diaminopropane. The grease according to the present invention can be applied effectively to a copper slide contact under both low temperature (ca.- 40.degree. C.) and high temperature (ca. 160.degree. C.) conditions.