摘要:
A part is made of a material comprising less than 90% by weight of a polymer selected from the group consisting of polytetrafluoroethylene, polyurethane, nitrile, fluoroelastomer, and polyphenylene sulfide; and more than 10% by weight of another material, comprising about 15% to 60% by volume of grains of titanium carbide dispersed through a metal matrix.
摘要:
Novel cobalt thiobis (alkylphenolates) and coordination compounds thereof with alcohols, alkyl amines, or aryl amines are effective anti-oxidant additives for various organic media such as oils of lubricating viscosity and plastics. Synergistic and improved antioxidant combinations are formed from the admixture of said additives and known antioxidants such as N-phenyl-1-naphthylamine. Additionally, these cobalt thiobis(alkylphenolates), coordination compounds thereof and said combinations are also highly useful as energy quenchers and antisludging agents in organic substrates.
摘要:
A radioactive tracer system for indicating drill bit wear or failure utilizing radioactive krypton 85 dissolved or dispersed in an organic or metal organic thickened grease. Preferably the radioactive krypton is placed so that when drill bit wear or failure occurs, the radioactive krypton 85 is released and effectively becomes diffused in the circulating drilling fluid. At the surface, the radioactive krypton 85 gas is separated from the circulating drilling fluid by gas-mud separating means and is transported as a gas to a counting chamber where an accurate radioactivity count of beta rays released from the krypton is obtained. The beta rays indicate drill bit wear or failure when detected above the normal background radioactivity of the recirculating drilling fluid.
摘要:
A lubricant film which prevents galling or sliding metal surfaces comprising: a solid lubricant comprising 60-80% wt % of MoS.sub.2 or MoS.sub.2 +graphite; a lubricant additive comprising at least one component which comprises 10-30% wt % of Sb.sub.2 O.sub.3, Fe powder Zn powder or Ag powder; and an organic binder comprising 3-15% by weight of at least one component selected from the group consisting of epoxy ester resin, acrylic resin and urea resin.
摘要翻译:一种防止金属表面磨损或滑动的润滑剂膜,包括:包含60-80重量%的MoS 2或MoS 2 +石墨的固体润滑剂; 包含至少一种包含10-30重量%的Sb 2 O 3,Fe粉末Zn粉末或Ag粉末的组分的润滑剂添加剂; 和包含3-15重量%的至少一种选自环氧酯树脂,丙烯酸树脂和尿素树脂的组分的有机粘合剂。
摘要:
Novel polyphenol compositions are prepared by successively reacting a phenol with formaldehyde or a reversible polymer thereof and sulfurizing the same with sulfur or a sulfur halide. The formaldehyde reaction and sulfurization may be effected in either order, but preferably the formaldehyde reaction takes place first. The resulting polyphenols are useful as oxidation inhibitors in lubricants. They may also be reacted with epoxides, and either the polyphenols or the epoxide reaction products thereof may be reacted with metal bases (especially alkali metal and alkaline earth metal bases, and preferably barium or calcium) to yield basic salts. The basic salts may also be reacted with epoxides, preferably ethylene oxide and propylene oxide. The basic salts thus obtained are useful in lubricants as detergents and oxidation inhibitors.
摘要:
A composition for producing an antifriction structural material comprising a carborane-containing polymer binder and an inorganic heat resistant solid lubricant. The binder is a polyester, a polyamide, a polyimide, or a polyoxadiazole containing carborane units attached to the polymer chain thereof. A process for producing said antifriction structural material from said composition comprising subjecting the composition to compression moulding at temperatures of up to 400*C, followed by coking at temperatures ranging from 400* to 900*C. The antifriction material according to the present invention is intended for operation in dry-friction units within a wide temperature range.
摘要:
Mixed transition metal-alkali metal derivatives of thiobis (alkylphenols) and thiobis (alkylphenol-phenolates) are novel compounds which have utility as oxidation stabilizers for various organic media, e.g., lubricant compositions.
摘要:
Compositions made by reacting (I) a metal phenoxide salt of a bridged phenol of 2 to about 20 phenol groups and (II) a carboxylic acid reagent containing from one to three carboxyl-based groups and a halogen-substituted hydrocarbon-based aliphatic or alicyclic group containing a halogen atom are useful as additives for lubricants and normally liquid fuels. Analogous thiophenoxide-based compositions are similarly useful. These compositions can also be used as intermediates for the preparation of other useful additive compositions through their reaction with alcohols, amino compounds, reactive small ring heterocycles and basically reacting metal compounds.
摘要:
A process for producing over-based sulfurized alkaline earth metal phenates useful as lubricating oil or fuel oil additives comprising reacting a phenol, sulfur, a dihydric alcohol and an alkaline earth metal oxide or hydroxide with about 0.99 to about 0.001 gram equivalents per phenolic hydroxyl group, and reacting the reaction product with carbon dioxide at a temperature of about 50.degree. to about 230.degree. C.